merge changes for STORM-1654

43 files changed, 2724 insertions, 643 deletions

diff --git a/indra/llui/CMakeLists.txt b/indra/llui/CMakeLists.txt
index 0ab883cb70..772f173f17 100644
--- a/indra/llui/CMakeLists.txt
+++ b/indra/llui/CMakeLists.txt
@@ -5,6 +5,7 @@ project(llui)
 include(00-Common)
 include(LLCommon)
 include(LLImage)
+include(LLInventory)
 include(LLMath)
 include(LLMessage)
 include(LLRender)
@@ -16,6 +17,7 @@ include(LLXUIXML)
 include_directories(
     ${LLCOMMON_INCLUDE_DIRS}
     ${LLIMAGE_INCLUDE_DIRS}
+    ${LLINVENTORY_INCLUDE_DIRS}
     ${LLMATH_INCLUDE_DIRS}
     ${LLMESSAGE_INCLUDE_DIRS}
     ${LLRENDER_INCLUDE_DIRS}
@@ -35,6 +37,7 @@ set(llui_SOURCE_FILES
     llcheckboxctrl.cpp
     llclipboard.cpp
     llcombobox.cpp
+    llcommandmanager.cpp
     llconsole.cpp
     llcontainerview.cpp
     llctrlselectioninterface.cpp
@@ -99,6 +102,7 @@ set(llui_SOURCE_FILES
     lltimectrl.cpp
     lltransutil.cpp
     lltoggleablemenu.cpp
+    lltoolbar.cpp
     lltooltip.cpp
     llui.cpp
     lluicolortable.cpp
@@ -132,6 +136,7 @@ set(llui_HEADER_FILES
     llcheckboxctrl.h
     llclipboard.h
     llcombobox.h
+    llcommandmanager.h
     llconsole.h
     llcontainerview.h
     llctrlselectioninterface.h
@@ -201,6 +206,7 @@ set(llui_HEADER_FILES
     lltextvalidate.h
     lltimectrl.h
     lltoggleablemenu.h
+    lltoolbar.h
     lltooltip.h
     lltransutil.h
     lluicolortable.h
@@ -247,6 +253,7 @@ target_link_libraries(llui
     ${LLRENDER_LIBRARIES}
     ${LLWINDOW_LIBRARIES}
     ${LLIMAGE_LIBRARIES}
+    ${LLINVENTORY_LIBRARIES}
     ${LLVFS_LIBRARIES}    # ugh, just for LLDir
     ${LLXUIXML_LIBRARIES}
     ${LLXML_LIBRARIES}
diff --git a/indra/llui/llbutton.cpp b/indra/llui/llbutton.cpp
index 2459429f6e..74b8885e1f 100644
--- a/indra/llui/llbutton.cpp
+++ b/indra/llui/llbutton.cpp
@@ -83,10 +83,11 @@ LLButton::Params::Params()
 	label_color_selected("label_color_selected"),	// requires is_toggle true
 	label_color_disabled("label_color_disabled"),
 	label_color_disabled_selected("label_color_disabled_selected"),
-	highlight_color("highlight_color"),
 	image_color("image_color"),
 	image_color_disabled("image_color_disabled"),
-	image_overlay_color("image_overlay_color", LLColor4::white),
+	image_overlay_color("image_overlay_color", LLColor4::white % 0.75f),
+	image_overlay_disabled_color("image_overlay_disabled_color", LLColor4::white % 0.3f),
+	image_overlay_selected_color("image_overlay_selected_color", LLColor4::white),
 	flash_color("flash_color"),
 	pad_right("pad_right", LLUI::sSettingGroups["config"]->getS32("ButtonHPad")),
 	pad_left("pad_left", LLUI::sSettingGroups["config"]->getS32("ButtonHPad")),
@@ -99,10 +100,13 @@ LLButton::Params::Params()
 	scale_image("scale_image", true),
 	hover_glow_amount("hover_glow_amount"),
 	commit_on_return("commit_on_return", true),
+	display_pressed_state("display_pressed_state", true),
 	use_draw_context_alpha("use_draw_context_alpha", true),
 	badge("badge"),
 	handle_right_mouse("handle_right_mouse"),
-	held_down_delay("held_down_delay")
+	held_down_delay("held_down_delay"),
+	button_flash_count("button_flash_count"),
+	button_flash_rate("button_flash_rate")
 {
 	addSynonym(is_toggle, "toggle");
 	changeDefault(initial_value, LLSD(false));
@@ -136,12 +140,13 @@ LLButton::LLButton(const LLButton::Params& p)
 	mSelectedLabelColor(p.label_color_selected()),
 	mDisabledLabelColor(p.label_color_disabled()),
 	mDisabledSelectedLabelColor(p.label_color_disabled_selected()),
-	mHighlightColor(p.highlight_color()),
 	mImageColor(p.image_color()),
 	mFlashBgColor(p.flash_color()),
 	mDisabledImageColor(p.image_color_disabled()),
 	mImageOverlay(p.image_overlay()),
 	mImageOverlayColor(p.image_overlay_color()),
+	mImageOverlayDisabledColor(p.image_overlay_disabled_color()),
+	mImageOverlaySelectedColor(p.image_overlay_selected_color()),
 	mImageOverlayAlignment(LLFontGL::hAlignFromName(p.image_overlay_alignment)),
 	mImageOverlayTopPad(p.image_top_pad),
 	mImageOverlayBottomPad(p.image_bottom_pad),
@@ -159,12 +164,15 @@ LLButton::LLButton(const LLButton::Params& p)
 	mCommitOnReturn(p.commit_on_return),
 	mFadeWhenDisabled(FALSE),
 	mForcePressedState(false),
+	mDisplayPressedState(p.display_pressed_state),
 	mLastDrawCharsCount(0),
 	mMouseDownSignal(NULL),
 	mMouseUpSignal(NULL),
 	mHeldDownSignal(NULL),
 	mUseDrawContextAlpha(p.use_draw_context_alpha),
-	mHandleRightMouse(p.handle_right_mouse)
+	mHandleRightMouse(p.handle_right_mouse),
+	mButtonFlashCount(p.button_flash_count),
+	mButtonFlashRate(p.button_flash_rate)
 {
 	static LLUICachedControl<S32> llbutton_orig_h_pad ("UIButtonOrigHPad", 0);
 	static Params default_params(LLUICtrlFactory::getDefaultParams<LLButton>());
@@ -292,6 +300,24 @@ void LLButton::onCommit()
 	LLUICtrl::onCommit();
 }
 
+boost::signals2::connection LLButton::setClickedCallback(const CommitCallbackParam& cb)
+{
+	return setClickedCallback(initCommitCallback(cb));
+}
+boost::signals2::connection LLButton::setMouseDownCallback(const CommitCallbackParam& cb)
+{
+	return setMouseDownCallback(initCommitCallback(cb));
+}
+boost::signals2::connection LLButton::setMouseUpCallback(const CommitCallbackParam& cb)
+{
+	return setMouseUpCallback(initCommitCallback(cb));
+}
+boost::signals2::connection LLButton::setHeldDownCallback(const CommitCallbackParam& cb)
+{
+	return setHeldDownCallback(initCommitCallback(cb));
+}
+
+
 boost::signals2::connection LLButton::setClickedCallback( const commit_signal_t::slot_type& cb )
 {
 	if (!mCommitSignal) mCommitSignal = new commit_signal_t();
@@ -314,7 +340,7 @@ boost::signals2::connection LLButton::setHeldDownCallback( const commit_signal_t
 }
 
 
-// *TODO: Deprecate (for backwards compatability only)
+// *TODO: Deprecate (for backwards compatibility only)
 boost::signals2::connection LLButton::setClickedCallback( button_callback_t cb, void* data )
 {
 	return setClickedCallback(boost::bind(cb, data));
@@ -511,15 +537,6 @@ BOOL	LLButton::handleRightMouseUp(S32 x, S32 y, MASK mask)
 	return TRUE;
 }
 
-
-void LLButton::onMouseEnter(S32 x, S32 y, MASK mask)
-{
-	LLUICtrl::onMouseEnter(x, y, mask);
-
-	if (isInEnabledChain())
-		mNeedsHighlight = TRUE;
-}
-
 void LLButton::onMouseLeave(S32 x, S32 y, MASK mask)
 {
 	LLUICtrl::onMouseLeave(x, y, mask);
@@ -534,6 +551,10 @@ void LLButton::setHighlight(bool b)
 
 BOOL LLButton::handleHover(S32 x, S32 y, MASK mask)
 {
+	if (isInEnabledChain() 
+		&& (!gFocusMgr.getMouseCapture() || gFocusMgr.getMouseCapture() == this))
+		mNeedsHighlight = TRUE;
+
 	if (!childrenHandleHover(x, y, mask))
 	{
 		if (mMouseDownTimer.getStarted())
@@ -554,21 +575,29 @@ BOOL LLButton::handleHover(S32 x, S32 y, MASK mask)
 	return TRUE;
 }
 
+void LLButton::getOverlayImageSize(S32& overlay_width, S32& overlay_height)
+{
+	overlay_width = mImageOverlay->getWidth();
+	overlay_height = mImageOverlay->getHeight();
+
+	F32 scale_factor = llmin((F32)getRect().getWidth() / (F32)overlay_width, (F32)getRect().getHeight() / (F32)overlay_height, 1.f);
+	overlay_width = llround((F32)overlay_width * scale_factor);
+	overlay_height = llround((F32)overlay_height * scale_factor);
+}
+
 
 // virtual
 void LLButton::draw()
 {
 	F32 alpha = mUseDrawContextAlpha ? getDrawContext().mAlpha : getCurrentTransparency();
 	bool flash = FALSE;
-	static LLUICachedControl<F32> button_flash_rate("ButtonFlashRate", 0);
-	static LLUICachedControl<S32> button_flash_count("ButtonFlashCount", 0);
 
 	if( mFlashing )
 	{
 		F32 elapsed = mFlashingTimer.getElapsedTimeF32();
-		S32 flash_count = S32(elapsed * button_flash_rate * 2.f);
+		S32 flash_count = S32(elapsed * mButtonFlashRate * 2.f);
 		// flash on or off?
-		flash = (flash_count % 2 == 0) || flash_count > S32((F32)button_flash_count * 2.f);
+		flash = (flash_count % 2 == 0) || flash_count > S32((F32)mButtonFlashCount * 2.f);
 	}
 
 	bool pressed_by_keyboard = FALSE;
@@ -597,7 +626,7 @@ void LLButton::draw()
 	LLColor4 glow_color = LLColor4::white;
 	LLRender::eBlendType glow_type = LLRender::BT_ADD_WITH_ALPHA;
 	LLUIImage* imagep = NULL;
-	if (pressed)
+	if (pressed && mDisplayPressedState)
 	{
 		imagep = selected ? mImagePressedSelected : mImagePressed;
 	}
@@ -707,16 +736,7 @@ void LLButton::draw()
 	}
 
 	// Unselected label assignments
-	LLWString label;
-
-	if( getToggleState() )
-	{
-		label = mSelectedLabel;
-	}
-	else
-	{
-		label = mUnselectedLabel;
-	}
+	LLWString label = getCurrentLabel();
 
 	// overlay with keyboard focus border
 	if (hasFocus())
@@ -781,18 +801,16 @@ void LLButton::draw()
 	if (mImageOverlay.notNull())
 	{
 		// get max width and height (discard level 0)
-		S32 overlay_width = mImageOverlay->getWidth();
-		S32 overlay_height = mImageOverlay->getHeight();
+		S32 overlay_width;
+		S32 overlay_height;
 
-		F32 scale_factor = llmin((F32)getRect().getWidth() / (F32)overlay_width, (F32)getRect().getHeight() / (F32)overlay_height, 1.f);
-		overlay_width = llround((F32)overlay_width * scale_factor);
-		overlay_height = llround((F32)overlay_height * scale_factor);
+		getOverlayImageSize(overlay_width, overlay_height);
 
 		S32 center_x = getLocalRect().getCenterX();
 		S32 center_y = getLocalRect().getCenterY();
 
 		//FUGLY HACK FOR "DEPRESSED" BUTTONS
-		if (pressed)
+		if (pressed && mDisplayPressedState)
 		{
 			center_y--;
 			center_x++;
@@ -803,7 +821,11 @@ void LLButton::draw()
 		LLColor4 overlay_color = mImageOverlayColor.get();
 		if (!enabled)
 		{
-			overlay_color.mV[VALPHA] = 0.5f;
+			overlay_color = mImageOverlayDisabledColor.get();
+		}
+		else if (getToggleState())
+		{
+			overlay_color = mImageOverlaySelectedColor.get();
 		}
 		overlay_color.mV[VALPHA] *= alpha;
 
@@ -811,6 +833,7 @@ void LLButton::draw()
 		{
 		case LLFontGL::LEFT:
 			text_left += overlay_width + mImgOverlayLabelSpace;
+			text_width -= overlay_width + mImgOverlayLabelSpace;
 			mImageOverlay->draw(
 				mLeftHPad,
 				center_y - (overlay_height / 2), 
@@ -828,6 +851,7 @@ void LLButton::draw()
 			break;
 		case LLFontGL::RIGHT:
 			text_right -= overlay_width + mImgOverlayLabelSpace;
+			text_width -= overlay_width + mImgOverlayLabelSpace;
 			mImageOverlay->draw(
 				getRect().getWidth() - mRightHPad - overlay_width,
 				center_y - (overlay_height / 2), 
@@ -863,7 +887,7 @@ void LLButton::draw()
 
 		S32 y_offset = 2 + (getRect().getHeight() - 20)/2;
 	
-		if (pressed)
+		if (pressed && mDisplayPressedState)
 		{
 			y_offset--;
 			x++;
@@ -919,7 +943,7 @@ void LLButton::setToggleState(BOOL b)
 
 void LLButton::setFlashing( BOOL b )	
 { 
-	if (b != mFlashing)
+	if ((bool)b != mFlashing)
 	{
 		mFlashing = b; 
 		mFlashingTimer.reset();
@@ -959,6 +983,23 @@ void LLButton::setLabelSelected( const LLStringExplicit& label )
 	mSelectedLabel = label;
 }
 
+bool LLButton::labelIsTruncated() const
+{
+	return getCurrentLabel().getString().size() > mLastDrawCharsCount;
+}
+
+const LLUIString& LLButton::getCurrentLabel() const
+{
+	if( getToggleState() )
+	{
+		return mSelectedLabel;
+	}
+	else
+	{
+		return mUnselectedLabel;
+	}
+}
+
 void LLButton::setImageUnselected(LLPointer<LLUIImage> image)
 {
 	mImageUnselected = image;
@@ -970,16 +1011,7 @@ void LLButton::setImageUnselected(LLPointer<LLUIImage> image)
 
 void LLButton::autoResize()
 {
-	LLUIString label;
-	if(getToggleState())
-	{
-		label = mSelectedLabel;
-	}
-	else
-	{
-		label = mUnselectedLabel;
-	}
-	resize(label);
+	resize(getCurrentLabel());
 }
 
 void LLButton::resize(LLUIString label)
@@ -989,11 +1021,32 @@ void LLButton::resize(LLUIString label)
 	// get current btn length 
 	S32 btn_width =getRect().getWidth();
     // check if it need resize 
-	if (mAutoResize == TRUE)
+	if (mAutoResize)
 	{ 
-		if (btn_width - (mRightHPad + mLeftHPad) < label_width)
+		S32 min_width = label_width + mLeftHPad + mRightHPad;
+		if (mImageOverlay)
+		{
+			S32 overlay_width = mImageOverlay->getWidth();
+			F32 scale_factor = (getRect().getHeight() - (mImageOverlayBottomPad + mImageOverlayTopPad)) / (F32)mImageOverlay->getHeight();
+			overlay_width = llround((F32)overlay_width * scale_factor);
+
+			switch(mImageOverlayAlignment)
+			{
+			case LLFontGL::LEFT:
+			case LLFontGL::RIGHT:
+				min_width += overlay_width + mImgOverlayLabelSpace;
+				break;
+			case LLFontGL::HCENTER:
+				min_width = llmax(min_width, overlay_width + mLeftHPad + mRightHPad);
+				break;
+			default:
+				// draw nothing
+				break;
+			}
+		}
+		if (btn_width < min_width)
 		{
-			setRect(LLRect( getRect().mLeft, getRect().mTop, getRect().mLeft + label_width + mLeftHPad + mRightHPad , getRect().mBottom));
+			reshape(min_width, getRect().getHeight());
 		}
 	} 
 }
@@ -1140,7 +1193,7 @@ void LLButton::setFloaterToggle(LLUICtrl* ctrl, const LLSD& sdname)
 	// Set the button control value (toggle state) to the floater visibility control (Sets the value as well)
 	button->setControlVariable(LLFloater::getControlGroup()->getControl(vis_control_name));
 	// Set the clicked callback to toggle the floater
-	button->setClickedCallback(boost::bind(&LLFloaterReg::toggleFloaterInstance, sdname));
+	button->setClickedCallback(boost::bind(&LLFloaterReg::toggleInstance, sdname, LLSD()));
 }
 
 // static
diff --git a/indra/llui/llbutton.h b/indra/llui/llbutton.h
index 5968916006..deaa0823c6 100644
--- a/indra/llui/llbutton.h
+++ b/indra/llui/llbutton.h
@@ -91,10 +91,11 @@ public:
 								label_color_selected,
 								label_color_disabled,
 								label_color_disabled_selected,
-								highlight_color,
 								image_color,
 								image_color_disabled,
 								image_overlay_color,
+								image_overlay_selected_color,
+								image_overlay_disabled_color,
 								flash_color;
 
 		// layout
@@ -120,7 +121,8 @@ public:
 		// misc
 		Optional<bool>			is_toggle,
 								scale_image,
-								commit_on_return;
+								commit_on_return,
+								display_pressed_state;
 		
 		Optional<F32>				hover_glow_amount;
 		Optional<TimeIntervalParam>	held_down_delay;
@@ -131,6 +133,9 @@ public:
 
 		Optional<bool>				handle_right_mouse;
 
+		Optional<S32>				button_flash_count;
+		Optional<F32>				button_flash_rate;
+
 		Params();
 	};
 	
@@ -157,7 +162,6 @@ public:
 	virtual void	draw();
 	/*virtual*/ BOOL postBuild();
 
-	virtual void	onMouseEnter(S32 x, S32 y, MASK mask);
 	virtual void	onMouseLeave(S32 x, S32 y, MASK mask);
 	virtual void	onMouseCaptureLost();
 
@@ -168,6 +172,11 @@ public:
 	void			setUseEllipses( BOOL use_ellipses )					{ mUseEllipses = use_ellipses; }
 
 
+	boost::signals2::connection setClickedCallback(const CommitCallbackParam& cb);
+	boost::signals2::connection setMouseDownCallback(const CommitCallbackParam& cb);
+	boost::signals2::connection setMouseUpCallback(const CommitCallbackParam& cb);
+	boost::signals2::connection setHeldDownCallback(const CommitCallbackParam& cb);
+
 	boost::signals2::connection setClickedCallback( const commit_signal_t::slot_type& cb ); // mouse down and up within button
 	boost::signals2::connection setMouseDownCallback( const commit_signal_t::slot_type& cb );
 	boost::signals2::connection setMouseUpCallback( const commit_signal_t::slot_type& cb ); // mouse up, EVEN IF NOT IN BUTTON
@@ -235,6 +244,8 @@ public:
 
 
 	S32				getLastDrawCharsCount() const { return mLastDrawCharsCount; }
+	bool			labelIsTruncated() const;
+	const LLUIString&	getCurrentLabel() const;
 
 	void			setScaleImage(BOOL scale)			{ mScaleImage = scale; }
 	BOOL			getScaleImage() const				{ return mScaleImage; }
@@ -270,14 +281,16 @@ public:
 protected:
 	LLPointer<LLUIImage> getImageUnselected() const	{ return mImageUnselected; }
 	LLPointer<LLUIImage> getImageSelected() const	{ return mImageSelected; }
+	void getOverlayImageSize(S32& overlay_width, S32& overlay_height);
 
 	LLFrameTimer	mMouseDownTimer;
+	bool			mNeedsHighlight;
+	S32				mButtonFlashCount;
+	F32				mButtonFlashRate;
 
-private:
 	void			drawBorder(LLUIImage* imagep, const LLColor4& color, S32 size);
 	void			resetMouseDownTimer();
 
-private:
 	commit_signal_t* 			mMouseDownSignal;
 	commit_signal_t* 			mMouseUpSignal;
 	commit_signal_t* 			mHeldDownSignal;
@@ -293,6 +306,8 @@ private:
 	LLPointer<LLUIImage>		mImageOverlay;
 	LLFontGL::HAlign			mImageOverlayAlignment;
 	LLUIColor					mImageOverlayColor;
+	LLUIColor					mImageOverlaySelectedColor;
+	LLUIColor					mImageOverlayDisabledColor;
 
 	LLPointer<LLUIImage>		mImageUnselected;
 	LLUIString					mUnselectedLabel;
@@ -321,21 +336,19 @@ private:
 	   flash icon name is set in attributes(by default it isn't). First way is used otherwise. */
 	LLPointer<LLUIImage>		mImageFlash;
 
-	LLUIColor					mHighlightColor;
 	LLUIColor					mFlashBgColor;
 
 	LLUIColor					mImageColor;
 	LLUIColor					mDisabledImageColor;
 
-	BOOL						mIsToggle;
-	BOOL						mScaleImage;
-
-	BOOL						mDropShadowedText;
-	BOOL						mAutoResize;
-	BOOL						mUseEllipses;
-	BOOL						mBorderEnabled;
+	bool						mIsToggle;
+	bool						mScaleImage;
 
-	BOOL						mFlashing;
+	bool						mDropShadowedText;
+	bool						mAutoResize;
+	bool						mUseEllipses;
+	bool						mBorderEnabled;
+	bool						mFlashing;
 
 	LLFontGL::HAlign			mHAlign;
 	S32							mLeftHPad;
@@ -355,10 +368,10 @@ private:
 	F32							mHoverGlowStrength;
 	F32							mCurGlowStrength;
 
-	BOOL						mNeedsHighlight;
-	BOOL						mCommitOnReturn;
-	BOOL						mFadeWhenDisabled;
+	bool						mCommitOnReturn;
+	bool						mFadeWhenDisabled;
 	bool						mForcePressedState;
+	bool						mDisplayPressedState;
 
 	LLFrameTimer				mFlashingTimer;
 
diff --git a/indra/llui/llclipboard.cpp b/indra/llui/llclipboard.cpp
index 984c4ec5fb..6910b962a1 100644
--- a/indra/llui/llclipboard.cpp
+++ b/indra/llui/llclipboard.cpp
@@ -40,6 +40,7 @@ LLClipboard gClipboard;
 
 LLClipboard::LLClipboard()
 {
+	mSourceItem = NULL;
 }
 
 
@@ -134,3 +135,8 @@ BOOL LLClipboard::canPastePrimaryString() const
 {
 	return LLView::getWindow()->isPrimaryTextAvailable();
 }
+
+void LLClipboard::setSourceObject(const LLUUID& source_id, LLAssetType::EType type) 
+{
+	mSourceItem = new LLInventoryObject (source_id, LLUUID::null, type, "");
+}
diff --git a/indra/llui/llclipboard.h b/indra/llui/llclipboard.h
index 24cb46c3f4..9371b94284 100644
--- a/indra/llui/llclipboard.h
+++ b/indra/llui/llclipboard.h
@@ -30,6 +30,8 @@
 
 #include "llstring.h"
 #include "lluuid.h"
+#include "stdenums.h"
+#include "llinventory.h"
 
 
 class LLClipboard
@@ -52,9 +54,14 @@ public:
 	BOOL		canPastePrimaryString() const;
 	const LLWString&	getPastePrimaryWString(LLUUID* source_id = NULL);	
 
+	// Support clipboard for object known only by their uuid and asset type
+	void		  setSourceObject(const LLUUID& source_id, LLAssetType::EType type);
+	const LLInventoryObject* getSourceObject() { return mSourceItem; }
+	
 private:
-	LLUUID		mSourceID;
+	LLUUID      mSourceID;
 	LLWString	mString;
+	LLInventoryObject* mSourceItem;
 };
 
 
diff --git a/indra/llui/llcommandmanager.cpp b/indra/llui/llcommandmanager.cpp
new file mode 100644
index 0000000000..128ba609cb
--- /dev/null
+++ b/indra/llui/llcommandmanager.cpp
@@ -0,0 +1,171 @@
+/** 
+ * @file llcommandmanager.cpp
+ * @brief LLCommandManager class
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+// A control that displays the name of the chosen item, which when
+// clicked shows a scrolling box of options.
+
+#include "linden_common.h"
+
+#include "llcommandmanager.h"
+#include "lldir.h"
+#include "llerror.h"
+#include "llxuiparser.h"
+
+#include <boost/foreach.hpp>
+
+
+//
+// LLCommandId class
+//
+
+const LLCommandId LLCommandId::null = LLCommandId();
+
+//
+// LLCommand class
+//
+
+LLCommand::Params::Params()
+	: available_in_toybox("available_in_toybox", false)
+	, icon("icon")
+	, label_ref("label_ref")
+	, name("name")
+	, tooltip_ref("tooltip_ref")
+	, execute_function("execute_function")
+	, execute_parameters("execute_parameters")
+	, execute_stop_function("execute_stop_function")
+	, execute_stop_parameters("execute_stop_parameters")
+	, is_enabled_function("is_enabled_function")
+	, is_enabled_parameters("is_enabled_parameters")
+	, is_running_function("is_running_function")
+	, is_running_parameters("is_running_parameters")
+	, is_starting_function("is_starting_function")
+	, is_starting_parameters("is_starting_parameters")
+{
+}
+
+LLCommand::LLCommand(const LLCommand::Params& p)
+	: mAvailableInToybox(p.available_in_toybox)
+	, mIcon(p.icon)
+	, mIdentifier(p.name)
+	, mLabelRef(p.label_ref)
+	, mTooltipRef(p.tooltip_ref)
+	, mExecuteFunction(p.execute_function)
+	, mExecuteParameters(p.execute_parameters)
+	, mExecuteStopFunction(p.execute_stop_function)
+	, mExecuteStopParameters(p.execute_stop_parameters)
+	, mIsEnabledFunction(p.is_enabled_function)
+	, mIsEnabledParameters(p.is_enabled_parameters)
+	, mIsRunningFunction(p.is_running_function)
+	, mIsRunningParameters(p.is_running_parameters)
+	, mIsStartingFunction(p.is_starting_function)
+	, mIsStartingParameters(p.is_starting_parameters)
+{
+}
+
+
+//
+// LLCommandManager class
+//
+
+LLCommandManager::LLCommandManager()
+{
+}
+
+LLCommandManager::~LLCommandManager()
+{
+	for (CommandVector::iterator cmdIt = mCommands.begin(); cmdIt != mCommands.end(); ++cmdIt)
+	{
+		LLCommand * command = *cmdIt;
+
+		delete command;
+	}
+}
+
+U32 LLCommandManager::commandCount() const
+{
+	return mCommands.size();
+}
+
+LLCommand * LLCommandManager::getCommand(U32 commandIndex)
+{
+	return mCommands[commandIndex];
+}
+
+LLCommand * LLCommandManager::getCommand(const LLCommandId& commandId)
+{
+	LLCommand * command_match = NULL;
+
+	CommandIndexMap::const_iterator found = mCommandIndices.find(commandId.uuid());
+	
+	if (found != mCommandIndices.end())
+	{
+		command_match = mCommands[found->second];
+	}
+
+	return command_match;
+}
+
+void LLCommandManager::addCommand(LLCommand * command)
+{
+	LLCommandId command_id = command->id();
+	mCommandIndices[command_id.uuid()] = mCommands.size();
+	mCommands.push_back(command);
+
+	lldebugs << "Successfully added command: " << command->id().name() << llendl;
+}
+
+//static
+bool LLCommandManager::load()
+{
+	LLCommandManager& mgr = LLCommandManager::instance();
+
+	std::string commands_file = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, "commands.xml");
+
+	LLCommandManager::Params commandsParams;
+
+	LLSimpleXUIParser parser;
+	
+	if (!parser.readXUI(commands_file, commandsParams))
+	{
+		llerrs << "Unable to load xml file: " << commands_file << llendl;
+		return false;
+	}
+
+	if (!commandsParams.validateBlock())
+	{
+		llerrs << "Invalid commands file: " << commands_file << llendl;
+		return false;
+	}
+
+	BOOST_FOREACH(LLCommand::Params& commandParams, commandsParams.commands)
+	{
+		LLCommand * command = new LLCommand(commandParams);
+
+		mgr.addCommand(command);
+	}
+
+	return true;
+}
diff --git a/indra/llui/llcommandmanager.h b/indra/llui/llcommandmanager.h
new file mode 100644
index 0000000000..9b93ab735a
--- /dev/null
+++ b/indra/llui/llcommandmanager.h
@@ -0,0 +1,217 @@
+/** 
+ * @file llcommandmanager.h
+ * @brief LLCommandManager class to hold commands
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLCOMMANDMANAGER_H
+#define LL_LLCOMMANDMANAGER_H
+
+#include "llinitparam.h"
+#include "llsingleton.h"
+
+
+class LLCommand;
+class LLCommandManager;
+
+
+class LLCommandId
+{
+public:
+	friend class LLCommand;
+	friend class LLCommandManager;
+
+	struct Params : public LLInitParam::Block<Params>
+	{
+		Mandatory<std::string> name;
+
+		Params()
+		:	name("name")
+		{}
+	};
+
+	LLCommandId()
+		: mName("null command")
+	{
+		mUUID = LLUUID::generateNewID(mName);
+	}
+	
+	LLCommandId(const std::string& name)
+		: mName(name)
+	{
+		mUUID = LLUUID::generateNewID(name);
+	}
+
+	LLCommandId(const Params& p)
+	:	mName(p.name)
+	{
+		mUUID = LLUUID::generateNewID(p.name);
+	}
+
+	LLCommandId(const LLUUID& uuid)
+	:	mName(""),
+		mUUID(uuid)
+	{
+	}
+	
+	const std::string& name() const { return mName; }
+	const LLUUID& uuid() const { return mUUID; }
+
+	bool operator!=(const LLCommandId& command) const
+	{
+		return (mUUID != command.mUUID);
+	}
+
+	bool operator==(const LLCommandId& command) const
+	{
+		return (mUUID == command.mUUID);
+	}
+
+	bool operator<(const LLCommandId& command) const
+	{
+		return (mName < command.mName);
+	}
+
+	static const LLCommandId null;
+
+private:
+	std::string mName;
+	LLUUID		mUUID;
+};
+
+typedef std::list<LLCommandId> command_id_list_t;
+
+
+class LLCommand
+{
+public:
+	struct Params : public LLInitParam::Block<Params>
+	{
+		Mandatory<bool>			available_in_toybox;
+		Mandatory<std::string>	icon;
+		Mandatory<std::string>	label_ref;
+		Mandatory<std::string>	name;
+		Mandatory<std::string>	tooltip_ref;
+
+		Mandatory<std::string>	execute_function;
+		Optional<LLSD>			execute_parameters;
+
+		Optional<std::string>	execute_stop_function;
+		Optional<LLSD>			execute_stop_parameters;
+		
+		Optional<std::string>	is_enabled_function;
+		Optional<LLSD>			is_enabled_parameters;
+
+		Optional<std::string>	is_running_function;
+		Optional<LLSD>			is_running_parameters;
+
+		Optional<std::string>	is_starting_function;
+		Optional<LLSD>			is_starting_parameters;
+
+		Params();
+	};
+
+	LLCommand(const LLCommand::Params& p);
+
+	const bool availableInToybox() const { return mAvailableInToybox; }
+	const std::string& icon() const { return mIcon; }
+	const LLCommandId& id() const { return mIdentifier; }
+	const std::string& labelRef() const { return mLabelRef; }
+	const std::string& tooltipRef() const { return mTooltipRef; }
+
+	const std::string& executeFunctionName() const { return mExecuteFunction; }
+	const LLSD& executeParameters() const { return mExecuteParameters; }
+
+	const std::string& executeStopFunctionName() const { return mExecuteStopFunction; }
+	const LLSD& executeStopParameters() const { return mExecuteStopParameters; }
+	
+	const std::string& isEnabledFunctionName() const { return mIsEnabledFunction; }
+	const LLSD& isEnabledParameters() const { return mIsEnabledParameters; }
+
+	const std::string& isRunningFunctionName() const { return mIsRunningFunction; }
+	const LLSD& isRunningParameters() const { return mIsRunningParameters; }
+
+	const std::string& isStartingFunctionName() const { return mIsStartingFunction; }
+	const LLSD& isStartingParameters() const { return mIsStartingParameters; }
+
+private:
+	LLCommandId mIdentifier;
+
+	bool        mAvailableInToybox;
+	std::string mIcon;
+	std::string mLabelRef;
+	std::string mTooltipRef;
+
+	std::string mExecuteFunction;
+	LLSD        mExecuteParameters;
+
+	std::string mExecuteStopFunction;
+	LLSD        mExecuteStopParameters;
+	
+	std::string mIsEnabledFunction;
+	LLSD        mIsEnabledParameters;
+
+	std::string mIsRunningFunction;
+	LLSD        mIsRunningParameters;
+
+	std::string mIsStartingFunction;
+	LLSD        mIsStartingParameters;
+};
+
+
+class LLCommandManager
+:	public LLSingleton<LLCommandManager>
+{
+public:
+	struct Params : public LLInitParam::Block<Params>
+	{
+		Multiple< LLCommand::Params, AtLeast<1> > commands;
+
+		Params()
+			:	commands("command")
+		{
+		}
+	};
+
+	LLCommandManager();
+	~LLCommandManager();
+
+	U32 commandCount() const;
+	LLCommand * getCommand(U32 commandIndex);
+	LLCommand * getCommand(const LLCommandId& commandId);
+
+	static bool load();
+
+protected:
+	void addCommand(LLCommand * command);
+
+private:
+	typedef std::map<LLUUID, U32>		CommandIndexMap;
+	typedef std::vector<LLCommand *>	CommandVector;
+	
+	CommandVector	mCommands;
+	CommandIndexMap	mCommandIndices;
+};
+
+
+#endif // LL_LLCOMMANDMANAGER_H
diff --git a/indra/llui/lldockcontrol.cpp b/indra/llui/lldockcontrol.cpp
index b1c27126d9..6397bbd0de 100644
--- a/indra/llui/lldockcontrol.cpp
+++ b/indra/llui/lldockcontrol.cpp
@@ -92,11 +92,12 @@ void LLDockControl::setDock(LLView* dockWidget)
 
 void LLDockControl::getAllowedRect(LLRect& rect)
 {
-	rect = mDockableFloater->getRootView()->getRect();
+	rect = mDockableFloater->getRootView()->getChild<LLView>("non_toolbar_panel")->getRect();
 }
 
 void LLDockControl::repositionDockable()
 {
+	if (!mDockWidget) return;
 	LLRect dockRect = mDockWidget->calcScreenRect();
 	LLRect rootRect;
 	mGetAllowedRectCallback(rootRect);
@@ -160,7 +161,7 @@ bool LLDockControl::isDockVisible()
 			case TOP:
 			{
 				// check is dock inside parent rect
-				// assume that parent for all dockable flaoters
+				// assume that parent for all dockable floaters
 				// is the root view
 				LLRect dockParentRect =
 						mDockWidget->getRootView()->calcScreenRect();
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index bc494e97f5..d1d840729d 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -62,6 +62,17 @@
 // use this to control "jumping" behavior when Ctrl-Tabbing
 const S32 TABBED_FLOATER_OFFSET = 0;
 
+namespace LLInitParam
+{
+	void TypeValues<LLFloaterEnums::EOpenPositioning>::declareValues()
+	{
+		declare("none",       LLFloaterEnums::OPEN_POSITIONING_NONE);
+		declare("cascading",  LLFloaterEnums::OPEN_POSITIONING_CASCADING);
+		declare("centered",   LLFloaterEnums::OPEN_POSITIONING_CENTERED);
+		declare("specified",  LLFloaterEnums::OPEN_POSITIONING_SPECIFIED);
+	}
+}
+
 std::string	LLFloater::sButtonNames[BUTTON_COUNT] = 
 {
 	"llfloater_close_btn",		//BUTTON_CLOSE
@@ -154,7 +165,6 @@ LLFloater::Params::Params()
 :	title("title"),
 	short_title("short_title"),
 	single_instance("single_instance", false),
-	auto_tile("auto_tile", false),
 	can_resize("can_resize", false),
 	can_minimize("can_minimize", true),
 	can_close("can_close", true),
@@ -164,7 +174,9 @@ LLFloater::Params::Params()
 	save_rect("save_rect", false),
 	save_visibility("save_visibility", false),
 	can_dock("can_dock", false),
-	open_centered("open_centered", false),
+	open_positioning("open_positioning", LLFloaterEnums::OPEN_POSITIONING_NONE),
+	specified_left("specified_left"),
+	specified_bottom("specified_bottom"),
 	header_height("header_height", 0),
 	legacy_header_height("legacy_header_height", 0),
 	close_image("close_image"),
@@ -227,12 +239,14 @@ LLFloater::LLFloater(const LLSD& key, const LLFloater::Params& p)
 	mShortTitle(p.short_title),
 	mSingleInstance(p.single_instance),
 	mKey(key),
-	mAutoTile(p.auto_tile),
 	mCanTearOff(p.can_tear_off),
 	mCanMinimize(p.can_minimize),
 	mCanClose(p.can_close),
 	mDragOnLeft(p.can_drag_on_left),
 	mResizable(p.can_resize),
+	mOpenPositioning(p.open_positioning),
+	mSpecifiedLeft(p.specified_left),
+	mSpecifiedBottom(p.specified_bottom),
 	mMinWidth(p.min_width),
 	mMinHeight(p.min_height),
 	mHeaderHeight(p.header_height),
@@ -459,15 +473,24 @@ void LLFloater::layoutResizeCtrls()
 	mResizeHandle[3]->setRect(rect);
 }
 
-void LLFloater::enableResizeCtrls(bool enable)
+void LLFloater::enableResizeCtrls(bool enable, bool width, bool height)
 {
+	mResizeBar[LLResizeBar::LEFT]->setVisible(enable && width);
+	mResizeBar[LLResizeBar::LEFT]->setEnabled(enable && width);
+
+	mResizeBar[LLResizeBar::TOP]->setVisible(enable && height);
+	mResizeBar[LLResizeBar::TOP]->setEnabled(enable && height);
+	
+	mResizeBar[LLResizeBar::RIGHT]->setVisible(enable && width);
+	mResizeBar[LLResizeBar::RIGHT]->setEnabled(enable && width);
+	
+	mResizeBar[LLResizeBar::BOTTOM]->setVisible(enable && height);
+	mResizeBar[LLResizeBar::BOTTOM]->setEnabled(enable && height);
+
 	for (S32 i = 0; i < 4; ++i)
 	{
-		mResizeBar[i]->setVisible(enable);
-		mResizeBar[i]->setEnabled(enable);
-
-		mResizeHandle[i]->setVisible(enable);
-		mResizeHandle[i]->setEnabled(enable);
+		mResizeHandle[i]->setVisible(enable && width && height);
+		mResizeHandle[i]->setEnabled(enable && width && height);
 	}
 }
 
@@ -660,6 +683,7 @@ void LLFloater::openFloater(const LLSD& key)
 	}
 	else
 	{
+		applyControlsAndPosition(LLFloaterReg::getLastFloaterCascading());
 		setMinimized(FALSE);
 		setVisibleAndFrontmost(mAutoFocus);
 	}
@@ -822,43 +846,100 @@ LLMultiFloater* LLFloater::getHost()
 	return (LLMultiFloater*)mHostHandle.get(); 
 }
 
-void    LLFloater::applySavedVariables()
+void LLFloater::applyControlsAndPosition(LLFloater* other)
 {
-	applyRectControl();
-	applyDockState();
+	if (!applyDockState())
+	{
+		if (!applyRectControl())
+		{
+			applyPositioning(other);
+		}
+	}
 }
 
-void LLFloater::applyRectControl()
+bool LLFloater::applyRectControl()
 {
-	// first, center on screen if requested	
-	if (mOpenCentered)
-	{
-		center();
-	}
+	bool saved_rect = false;
 
-	// override center if we have saved rect control
+	// If we have a saved rect, use it
 	if (mRectControl.size() > 1)
 	{
 		const LLRect& rect = getControlGroup()->getRect(mRectControl);
-		if (rect.getWidth() > 0 && rect.getHeight() > 0)
+		saved_rect = rect.notEmpty();
+		if (saved_rect)
 		{
-			translate( rect.mLeft - getRect().mLeft, rect.mBottom - getRect().mBottom);
+			setOrigin(rect.mLeft, rect.mBottom);
+
 			if (mResizable)
 			{
 				reshape(llmax(mMinWidth, rect.getWidth()), llmax(mMinHeight, rect.getHeight()));
 			}
 		}
 	}
+
+	return saved_rect;
 }
 
-void LLFloater::applyDockState()
+bool LLFloater::applyDockState()
 {
+	bool docked = false;
+
 	if (mDocStateControl.size() > 1)
 	{
-		bool dockState = getControlGroup()->getBOOL(mDocStateControl);
-		setDocked(dockState);
+		docked = getControlGroup()->getBOOL(mDocStateControl);
+		setDocked(docked);
 	}
 
+	return docked;
+}
+
+void LLFloater::applyPositioning(LLFloater* other)
+{
+	// Otherwise position according to the positioning code
+	switch (mOpenPositioning)
+	{
+	case LLFloaterEnums::OPEN_POSITIONING_CENTERED:
+		center();
+		break;
+
+	case LLFloaterEnums::OPEN_POSITIONING_SPECIFIED:
+		{
+			// Translate relative to snap rect
+			setOrigin(mSpecifiedLeft, mSpecifiedBottom);
+			const LLRect& snap_rect = gFloaterView->getSnapRect();
+			translate(snap_rect.mLeft, snap_rect.mBottom);
+			translateIntoRect(snap_rect, FALSE);
+		}
+		break;
+
+	case LLFloaterEnums::OPEN_POSITIONING_CASCADING:
+		if (other != NULL)
+		{
+			stackWith(*other);
+		}
+		else
+		{
+			static const U32 CASCADING_FLOATER_HOFFSET = 0;
+			static const U32 CASCADING_FLOATER_VOFFSET = 0;
+			
+			const LLRect& snap_rect = gFloaterView->getSnapRect();
+
+			const S32 horizontal_offset = CASCADING_FLOATER_HOFFSET;
+			const S32 vertical_offset = snap_rect.getHeight() - CASCADING_FLOATER_VOFFSET;
+
+			S32 rect_height = getRect().getHeight();
+			setOrigin(horizontal_offset, vertical_offset - rect_height);
+
+			translate(snap_rect.mLeft, snap_rect.mBottom);
+			translateIntoRect(snap_rect, FALSE);
+		}
+		break;
+
+	case LLFloaterEnums::OPEN_POSITIONING_NONE:
+	default:
+		// Do nothing
+		break;
+	}
 }
 
 void LLFloater::applyTitle()
@@ -1029,7 +1110,7 @@ void LLFloater::setMinimized(BOOL minimize)
 
 	if (minimize == mMinimized) return;
 
-	if(mMinimizeSignal)
+	if (mMinimizeSignal)
 	{
 		(*mMinimizeSignal)(this, LLSD(minimize));
 	}
@@ -2451,6 +2532,52 @@ void LLFloaterView::closeAllChildren(bool app_quitting)
 	}
 }
 
+void LLFloaterView::hiddenFloaterClosed(LLFloater* floater)
+{
+	for (hidden_floaters_t::iterator it = mHiddenFloaters.begin(), end_it = mHiddenFloaters.end();
+		it != end_it;
+		++it)
+	{
+		if (it->first.get() == floater)
+		{
+			it->second.disconnect();
+			mHiddenFloaters.erase(it);
+			break;
+		}
+	}
+}
+
+void LLFloaterView::hideAllFloaters()
+{
+	child_list_t child_list = *(getChildList());
+
+	for (child_list_iter_t it = child_list.begin(); it != child_list.end(); ++it)
+	{
+		LLFloater* floaterp = dynamic_cast<LLFloater*>(*it);
+		if (floaterp && floaterp->getVisible())
+		{
+			floaterp->setVisible(false);
+			boost::signals2::connection connection = floaterp->mCloseSignal.connect(boost::bind(&LLFloaterView::hiddenFloaterClosed, this, floaterp));
+			mHiddenFloaters.push_back(std::make_pair(floaterp->getHandle(), connection));
+		}
+	}
+}
+
+void LLFloaterView::showHiddenFloaters()
+{
+	for (hidden_floaters_t::iterator it = mHiddenFloaters.begin(), end_it = mHiddenFloaters.end();
+		it != end_it;
+		++it)
+	{
+		LLFloater* floaterp = it->first.get();
+		if (floaterp)
+		{
+			floaterp->setVisible(true);
+		}
+		it->second.disconnect();
+	}
+	mHiddenFloaters.clear();
+}
 
 BOOL LLFloaterView::allChildrenClosed()
 {
@@ -2549,7 +2676,7 @@ void LLFloaterView::adjustToFitScreen(LLFloater* floater, BOOL allow_partial_out
 	}
 
 	// move window fully onscreen
-	if (floater->translateIntoRect( getLocalRect(), allow_partial_outside ))
+	if (floater->translateIntoRect( getSnapRect(), allow_partial_outside ))
 	{
 		floater->clearSnapTarget();
 	}
@@ -2775,7 +2902,6 @@ void LLFloater::setInstanceName(const std::string& name)
 		{
 			mDocStateControl = LLFloaterReg::declareDockStateControl(ctrl_name);
 		}
-
 	}
 }
 
@@ -2837,8 +2963,10 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	mHeaderHeight = p.header_height;
 	mLegacyHeaderHeight = p.legacy_header_height;
 	mSingleInstance = p.single_instance;
-	mAutoTile = p.auto_tile;
-	mOpenCentered = p.open_centered;
+
+	mOpenPositioning = p.open_positioning;
+	mSpecifiedLeft = p.specified_left;
+	mSpecifiedBottom = p.specified_bottom;
 
 	if (p.save_rect && mRectControl.empty())
 	{
@@ -2848,7 +2976,6 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	{
 		mVisibilityControl = "t"; // flag to build mVisibilityControl name once mInstanceName is set
 	}
-
 	if(p.save_dock_state)
 	{
 		mDocStateControl = "t"; // flag to build mDocStateControl name once mInstanceName is set
@@ -2857,7 +2984,7 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	// open callback 
 	if (p.open_callback.isProvided())
 	{
-		mOpenSignal.connect(initCommitCallback(p.open_callback));
+		setOpenCallback(initCommitCallback(p.open_callback));
 	}
 	// close callback 
 	if (p.close_callback.isProvided())
@@ -2872,6 +2999,11 @@ boost::signals2::connection LLFloater::setMinimizeCallback( const commit_signal_
 	return mMinimizeSignal->connect(cb); 
 }
 
+boost::signals2::connection LLFloater::setOpenCallback( const commit_signal_t::slot_type& cb )
+{
+	return mOpenSignal.connect(cb);
+}
+
 boost::signals2::connection LLFloater::setCloseCallback( const commit_signal_t::slot_type& cb )
 {
 	return mCloseSignal.connect(cb);
@@ -2916,7 +3048,9 @@ bool LLFloater::initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::str
 			return FALSE;
 		}
 
-		parser.readXUI(referenced_xml, params, LLUICtrlFactory::getInstance()->getCurFileName());
+		Params referenced_params;
+		parser.readXUI(referenced_xml, referenced_params, LLUICtrlFactory::getInstance()->getCurFileName());
+		params.fillFrom(referenced_params);
 
 		// add children using dimensions from referenced xml for consistent layout
 		setShape(params.rect);
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 58c2d34253..8beb11507e 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -35,6 +35,7 @@
 #include "lluuid.h"
 //#include "llnotificationsutil.h"
 #include <set>
+#include <boost/signals2.hpp>
 
 class LLDragHandle;
 class LLResizeHandle;
@@ -59,11 +60,35 @@ const BOOL CLOSE_NO = FALSE;
 const BOOL ADJUST_VERTICAL_YES = TRUE;
 const BOOL ADJUST_VERTICAL_NO = FALSE;
 
+namespace LLFloaterEnums
+{
+	enum EOpenPositioning
+	{
+		OPEN_POSITIONING_NONE,
+		OPEN_POSITIONING_CASCADING,
+		OPEN_POSITIONING_CENTERED,
+		OPEN_POSITIONING_SPECIFIED,
+
+		OPEN_POSITIONING_COUNT
+	};
+}
+
+namespace LLInitParam
+{
+	template<>
+	struct TypeValues<LLFloaterEnums::EOpenPositioning> : public TypeValuesHelper<LLFloaterEnums::EOpenPositioning>
+	{
+		static void declareValues();
+	};
+}
+
+
 class LLFloater : public LLPanel
 {
-friend class LLFloaterView;
-friend class LLFloaterReg;
-friend class LLMultiFloater;
+	friend class LLFloaterView;
+	friend class LLFloaterReg;
+	friend class LLMultiFloater;
+
 public:
 	struct KeyCompare
 	{
@@ -95,7 +120,6 @@ public:
 								short_title;
 		
 		Optional<bool>			single_instance,
-								auto_tile,
 								can_resize,
 								can_minimize,
 								can_close,
@@ -104,8 +128,13 @@ public:
 								save_rect,
 								save_visibility,
 								save_dock_state,
-								can_dock,
-								open_centered;
+								can_dock;
+		
+		Optional<LLFloaterEnums::EOpenPositioning>	open_positioning;
+		Optional<S32>								specified_left;
+		Optional<S32>								specified_bottom;
+
+		
 		Optional<S32>			header_height,
 								legacy_header_height; // HACK see initFromXML()
 
@@ -144,6 +173,7 @@ public:
 	bool buildFromFile(const std::string &filename, LLXMLNodePtr output_node = NULL);
 
 	boost::signals2::connection setMinimizeCallback( const commit_signal_t::slot_type& cb );
+	boost::signals2::connection setOpenCallback( const commit_signal_t::slot_type& cb );
 	boost::signals2::connection setCloseCallback( const commit_signal_t::slot_type& cb );
 
 	void initFromParams(const LLFloater::Params& p);
@@ -265,8 +295,6 @@ public:
 
 	virtual void    setTornOff(bool torn_off) { mTornOff = torn_off; }
 
-	void			stackWith(LLFloater& other);
-
 	// Return a closeable floater, if any, given the current focus.
 	static LLFloater* getClosableFloaterFromFocus(); 
 
@@ -290,11 +318,17 @@ public:
 
 	void			updateTransparency(ETypeTransparency transparency_type);
 		
+	void			enableResizeCtrls(bool enable, bool width = true, bool height = true);
+
+	bool			isPositioning(LLFloaterEnums::EOpenPositioning p) const { return (p == mOpenPositioning); }
 protected:
-	virtual void    applySavedVariables();
+	void			applyControlsAndPosition(LLFloater* other);
+
+	void			stackWith(LLFloater& other);
 
-	void			applyRectControl();
-	void			applyDockState();
+	virtual bool	applyRectControl();
+	bool			applyDockState();
+	void			applyPositioning(LLFloater* other);
 	void			storeRectControl();
 	void			storeVisibilityControl();
 	void			storeDockStateControl();
@@ -339,7 +373,6 @@ private:
 	BOOL			offerClickToButton(S32 x, S32 y, MASK mask, EFloaterButton index);
 	void			addResizeCtrls();
 	void			layoutResizeCtrls();
-	void			enableResizeCtrls(bool enable);
 	void 			addDragHandle();
 	void			layoutDragHandle();		// repair layout
 
@@ -377,14 +410,16 @@ private:
 	
 	BOOL			mSingleInstance;	// TRUE if there is only ever one instance of the floater
 	std::string		mInstanceName;		// Store the instance name so we can remove ourselves from the list
-	BOOL			mAutoTile;			// TRUE if placement of new instances tiles
 	
 	BOOL			mCanTearOff;
 	BOOL			mCanMinimize;
 	BOOL			mCanClose;
 	BOOL			mDragOnLeft;
 	BOOL			mResizable;
-	bool			mOpenCentered;
+
+	LLFloaterEnums::EOpenPositioning	mOpenPositioning;
+	S32									mSpecifiedLeft;
+	S32									mSpecifiedBottom;
 	
 	S32				mMinWidth;
 	S32				mMinHeight;
@@ -427,8 +462,6 @@ private:
 	typedef std::map<LLHandle<LLFloater>, LLFloater*>::iterator handle_map_iter_t;
 	static handle_map_t	sFloaterMap;
 
-	std::vector<LLHandle<LLView> > mMinimizedHiddenChildren;
-
 	BOOL			mHasBeenDraggedWhileMinimized;
 	S32				mPreviousMinimizedBottom;
 	S32				mPreviousMinimizedLeft;
@@ -482,6 +515,10 @@ public:
 	BOOL			allChildrenClosed();
 	void			shiftFloaters(S32 x_offset, S32 y_offset);
 
+	void			hideAllFloaters();
+	void			showHiddenFloaters();
+
+
 	LLFloater* getFrontmost() const;
 	LLFloater* getBackmost() const;
 	LLFloater* getParentFloater(LLView* viewp) const;
@@ -496,11 +533,15 @@ public:
 	void setFloaterSnapView(LLHandle<LLView> snap_view) {mSnapView = snap_view; }
 
 private:
+	void hiddenFloaterClosed(LLFloater* floater);
+
 	LLHandle<LLView>	mSnapView;
 	BOOL			mFocusCycleMode;
 	S32				mSnapOffsetBottom;
 	S32				mSnapOffsetRight;
 	S32				mMinimizePositionVOffset;
+	typedef std::vector<std::pair<LLHandle<LLFloater>, boost::signals2::connection> > hidden_floaters_t;
+	hidden_floaters_t mHiddenFloaters;
 };
 
 //
diff --git a/indra/llui/llfloaterreg.cpp b/indra/llui/llfloaterreg.cpp
index fc7dcfcc4e..0edfc8da2d 100644
--- a/indra/llui/llfloaterreg.cpp
+++ b/indra/llui/llfloaterreg.cpp
@@ -59,19 +59,57 @@ void LLFloaterReg::add(const std::string& name, const std::string& filename, con
 //static
 LLFloater* LLFloaterReg::getLastFloaterInGroup(const std::string& name)
 {
-	LLRect rect;
 	const std::string& groupname = sGroupMap[name];
 	if (!groupname.empty())
 	{
 		instance_list_t& list = sInstanceMap[groupname];
 		if (!list.empty())
 		{
-			return list.back();
+			for (instance_list_t::reverse_iterator iter = list.rbegin(); iter != list.rend(); ++iter)
+			{
+				LLFloater* inst = *iter;
+
+				if (inst->getVisible() && !inst->isMinimized())
+				{
+					return inst;
+				}
+			}
 		}
 	}
 	return NULL;
 }
 
+LLFloater* LLFloaterReg::getLastFloaterCascading()
+{
+	LLRect candidate_rect;
+	candidate_rect.mTop = 100000;
+	LLFloater* candidate_floater = NULL;
+
+	std::map<std::string,std::string>::const_iterator it = sGroupMap.begin(), it_end = sGroupMap.end();
+	for( ; it != it_end; ++it)
+	{
+		const std::string& group_name = it->second;
+
+		instance_list_t& instances = sInstanceMap[group_name];
+
+		for (instance_list_t::const_iterator iter = instances.begin(); iter != instances.end(); ++iter)
+		{
+			LLFloater* inst = *iter;
+
+			if (inst->getVisible() && inst->isPositioning(LLFloaterEnums::OPEN_POSITIONING_CASCADING))
+			{
+				if (candidate_rect.mTop > inst->getRect().mTop)
+				{
+					candidate_floater = inst;
+					candidate_rect = inst->getRect();
+				}
+			}
+		}
+	}
+
+	return candidate_floater;
+}
+
 //static
 LLFloater* LLFloaterReg::findInstance(const std::string& name, const LLSD& key)
 {
@@ -107,37 +145,32 @@ LLFloater* LLFloaterReg::getInstance(const std::string& name, const LLSD& key)
 			if (!groupname.empty())
 			{
 				instance_list_t& list = sInstanceMap[groupname];
-				int index = list.size();
 
 				res = build_func(key);
-				
+				if (!res)
+				{
+					llwarns << "Failed to build floater type: '" << name << "'." << llendl;
+					return NULL;
+				}
 				bool success = res->buildFromFile(xui_file, NULL);
 				if (!success)
 				{
 					llwarns << "Failed to build floater type: '" << name << "'." << llendl;
 					return NULL;
 				}
-					
+
 				// Note: key should eventually be a non optional LLFloater arg; for now, set mKey to be safe
 				if (res->mKey.isUndefined()) 
 				{
-						res->mKey = key;
+					res->mKey = key;
 				}
 				res->setInstanceName(name);
-				res->applySavedVariables(); // Can't apply rect and dock state until setting instance name
-				if (res->mAutoTile && !res->getHost() && index > 0)
-				{
-					LLFloater* last_floater = getLastFloaterInGroup(groupname);
-					if (last_floater)
-					{
-						res->stackWith(*last_floater);
-						gFloaterView->adjustToFitScreen(res, true);
-					}
-				}
-				else
-				{
-					gFloaterView->adjustToFitScreen(res, false);
-				}
+
+				LLFloater *last_floater = (list.empty() ? NULL : list.back());
+				res->applyControlsAndPosition(last_floater);
+
+				gFloaterView->adjustToFitScreen(res, false);
+
 				list.push_back(res);
 			}
 		}
@@ -403,70 +436,71 @@ void LLFloaterReg::registerControlVariables()
 	}
 }
 
-// Callbacks
-
-// static
-// Call once (i.e use for init callbacks)
-void LLFloaterReg::initUICtrlToFloaterVisibilityControl(LLUICtrl* ctrl, const LLSD& sdname)
+//static
+void LLFloaterReg::toggleInstanceOrBringToFront(const LLSD& sdname, const LLSD& key)
 {
-	// Get the visibility control name for the floater
-	std::string vis_control_name = LLFloaterReg::declareVisibilityControl(sdname.asString());
-	// Set the control value to the floater visibility control (Sets the value as well)
-	ctrl->setControlVariable(LLFloater::getControlGroup()->getControl(vis_control_name));
-}
+	//
+	// Floaters controlled by the toolbar behave a bit differently from others.
+	// Namely they have 3-4 states as defined in the design wiki page here:
+	//   https://wiki.lindenlab.com/wiki/FUI_Button_states
+	//
+	// The basic idea is this:
+	// * If the target floater is minimized, this button press will un-minimize it.
+	// * Else if the target floater is closed open it.
+	// * Else if the target floater does not have focus, give it focus.
+	//       * Also, if it is not on top, bring it forward when focus is given.
+	// * Else the target floater is open, close it.
+	// 
 
-// callback args may use "floatername.key" format
-static void parse_name_key(std::string& name, LLSD& key)
-{
-	std::string instname = name;
-	std::size_t dotpos = instname.find(".");
-	if (dotpos != std::string::npos)
+	std::string name = sdname.asString();
+	LLFloater* instance = getInstance(name, key); 
+
+	if (!instance)
+	{
+		lldebugs << "Unable to get instance of floater '" << name << "'" << llendl;
+	}
+	else if (instance->isMinimized())
+	{
+		instance->setMinimized(FALSE);
+		instance->setFocus(TRUE);
+	}
+	else if (!instance->isShown())
+	{
+		instance->openFloater(key);
+		instance->setFocus(TRUE);
+	}
+	else if (!instance->hasFocus() && !instance->getIsChrome())
+	{
+		instance->setFocus(TRUE);
+	}
+	else
 	{
-		name = instname.substr(0, dotpos);
-		key = LLSD(instname.substr(dotpos+1, std::string::npos));
+		instance->closeFloater();
 	}
 }
 
-//static
-void LLFloaterReg::showFloaterInstance(const LLSD& sdname)
-{
-	LLSD key;
-	std::string name = sdname.asString();
-	parse_name_key(name, key);
-	showInstance(name, key, TRUE);
-}
-//static
-void LLFloaterReg::hideFloaterInstance(const LLSD& sdname)
-{
-	LLSD key;
-	std::string name = sdname.asString();
-	parse_name_key(name, key);
-	hideInstance(name, key);
-}
-//static
-void LLFloaterReg::toggleFloaterInstance(const LLSD& sdname)
+// static
+U32 LLFloaterReg::getVisibleFloaterInstanceCount()
 {
-	LLSD key;
-	std::string name = sdname.asString();
-	parse_name_key(name, key);
-	toggleInstance(name, key);
-}
+	U32 count = 0;
 
-//static
-bool LLFloaterReg::floaterInstanceVisible(const LLSD& sdname)
-{
-	LLSD key;
-	std::string name = sdname.asString();
-	parse_name_key(name, key);
-	return instanceVisible(name, key);
-}
+	std::map<std::string,std::string>::const_iterator it = sGroupMap.begin(), it_end = sGroupMap.end();
+	for( ; it != it_end; ++it)
+	{
+		const std::string& group_name = it->second;
 
-//static
-bool LLFloaterReg::floaterInstanceMinimized(const LLSD& sdname)
-{
-	LLSD key;
-	std::string name = sdname.asString();
-	parse_name_key(name, key);
-	LLFloater* instance = findInstance(name, key); 
-	return LLFloater::isShown(instance);
+		instance_list_t& instances = sInstanceMap[group_name];
+
+		for (instance_list_t::const_iterator iter = instances.begin(); iter != instances.end(); ++iter)
+		{
+			LLFloater* inst = *iter;
+
+			if (inst->getVisible() && !inst->isMinimized())
+			{
+				count++;
+			}
+		}
+	}
+
+	return count;
 }
diff --git a/indra/llui/llfloaterreg.h b/indra/llui/llfloaterreg.h
index a2027a77a0..534cf8b40a 100644
--- a/indra/llui/llfloaterreg.h
+++ b/indra/llui/llfloaterreg.h
@@ -87,6 +87,7 @@ public:
 
 	// Helpers
 	static LLFloater* getLastFloaterInGroup(const std::string& name);
+	static LLFloater* getLastFloaterCascading();
 	
 	// Find / get (create) / remove / destroy
 	static LLFloater* findInstance(const std::string& name, const LLSD& key = LLSD());
@@ -123,12 +124,7 @@ public:
 	static void registerControlVariables();
 
 	// Callback wrappers
-	static void initUICtrlToFloaterVisibilityControl(LLUICtrl* ctrl, const LLSD& sdname);
-	static void showFloaterInstance(const LLSD& sdname);
-	static void hideFloaterInstance(const LLSD& sdname);
-	static void toggleFloaterInstance(const LLSD& sdname);
-	static bool floaterInstanceVisible(const LLSD& sdname);
-	static bool floaterInstanceMinimized(const LLSD& sdname);
+	static void toggleInstanceOrBringToFront(const LLSD& sdname, const LLSD& key = LLSD());
 	
 	// Typed find / get / show
 	template <class T>
@@ -151,6 +147,7 @@ public:
 
 	static void blockShowFloaters(bool value) { sBlockShowFloaters = value;}
 	
+	static U32 getVisibleFloaterInstanceCount();
 };
 
 #endif
diff --git a/indra/llui/llhelp.h b/indra/llui/llhelp.h
index 83317bd03c..1726347a78 100644
--- a/indra/llui/llhelp.h
+++ b/indra/llui/llhelp.h
@@ -32,6 +32,7 @@ class LLHelp
 {
  public:
 	virtual void showTopic(const std::string &topic) = 0;
+	virtual std::string getURL(const std::string &topic) = 0;
 	// return default (fallback) topic name suitable for showTopic()
 	virtual std::string defaultTopic() = 0;
 	// return topic to use before the user logs in
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index a250404292..4991c4afa6 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -58,7 +58,9 @@ LLLayoutPanel::LLLayoutPanel(const Params& p)
 	mCollapsed(FALSE),
 	mCollapseAmt(0.f),
 	mVisibleAmt(1.f), // default to fully visible
-	mResizeBar(NULL) 
+	mResizeBar(NULL),
+	mFractionalSize(0.f),
+	mOrientation(LLLayoutStack::HORIZONTAL)
 {
 	// Set the expanded min dim if it is provided, otherwise it gets the p.min_dim value
 	if (p.expanded_min_dim.isProvided())
@@ -88,9 +90,22 @@ LLLayoutPanel::~LLLayoutPanel()
 	mResizeBar = NULL;
 }
 
-F32 LLLayoutPanel::getCollapseFactor(LLLayoutStack::ELayoutOrientation orientation)
+void LLLayoutPanel::reshape(S32 width, S32 height, BOOL called_from_parent)
 {
-	if (orientation == LLLayoutStack::HORIZONTAL)
+	if (mOrientation == LLLayoutStack::HORIZONTAL)
+	{
+		mFractionalSize += width - llround(mFractionalSize);
+	}
+	else
+	{
+		mFractionalSize += height - llround(mFractionalSize);
+	}
+	LLPanel::reshape(width, height, called_from_parent);
+}
+
+F32 LLLayoutPanel::getCollapseFactor()
+{
+	if (mOrientation == LLLayoutStack::HORIZONTAL)
 	{
 		F32 collapse_amt = 
 			clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, (F32)getRelevantMinDim() / (F32)llmax(1, getRect().getWidth()));
@@ -149,11 +164,11 @@ void LLLayoutStack::draw()
 		// scale clipping rectangle by visible amount
 		if (mOrientation == HORIZONTAL)
 		{
-			clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor(mOrientation));
+			clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor());
 		}
 		else
 		{
-			clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor(mOrientation));
+			clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor());
 		}
 
 		LLPanel* panelp = (*panel_it);
@@ -193,36 +208,15 @@ bool LLLayoutStack::addChild(LLView* child, S32 tab_group)
 	LLLayoutPanel* panelp = dynamic_cast<LLLayoutPanel*>(child);
 	if (panelp)
 	{
+		panelp->mFractionalSize = (mOrientation == HORIZONTAL)
+									? panelp->getRect().getWidth()
+									: panelp->getRect().getHeight();
+		panelp->setOrientation(mOrientation);
 		mPanels.push_back(panelp);
 	}
 	return LLView::addChild(child, tab_group);
 }
 
-
-S32 LLLayoutStack::getDefaultHeight(S32 cur_height)
-{
-	// if we are spanning our children (crude upward propagation of size)
-	// then don't enforce our size on our children
-	if (mOrientation == HORIZONTAL)
-	{
-		cur_height = llmax(mMinHeight, getRect().getHeight());
-	}
-
-	return cur_height;
-}
-
-S32 LLLayoutStack::getDefaultWidth(S32 cur_width)
-{
-	// if we are spanning our children (crude upward propagation of size)
-	// then don't enforce our size on our children
-	if (mOrientation == VERTICAL)
-	{
-		cur_width = llmax(mMinWidth, getRect().getWidth());
-	}
-
-	return cur_width;
-}
-
 void LLLayoutStack::movePanel(LLPanel* panel_to_move, LLPanel* target_panel, bool move_to_front)
 {
 	LLLayoutPanel* embedded_panel_to_move = findEmbeddedPanel(panel_to_move);
@@ -317,9 +311,11 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	createResizeBars();
 
 	// calculate current extents
-	S32 total_width = 0;
-	S32 total_height = 0;
+	F32 total_size = 0.f;
 
+	//
+	// animate visibility
+	//
 	e_panel_list_t::iterator panel_it;
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end();	++panel_it)
 	{
@@ -361,179 +357,110 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 			}
 		}
 
-		if (panelp->mCollapsed)
-		{
-			panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, 1.f, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
-		}
-		else
-		{
-			panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, 0.f, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
-		}
+		F32 collapse_state = panelp->mCollapsed ? 1.f : 0.f;
+		panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, collapse_state, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
 
-		if (mOrientation == HORIZONTAL)
-		{
-			// enforce minimize size constraint by default
-			if (panelp->getRect().getWidth() < panelp->getRelevantMinDim())
-			{
-				panelp->reshape(panelp->getRelevantMinDim(), panelp->getRect().getHeight());
-			}
-        	total_width += llround(panelp->getRect().getWidth() * panelp->getCollapseFactor(mOrientation));
-        	// want n-1 panel gaps for n panels
-			if (panel_it != mPanels.begin())
-			{
-				total_width += mPanelSpacing;
-			}
-		}
-		else //VERTICAL
+        total_size += panelp->mFractionalSize * panelp->getCollapseFactor();
+        // want n-1 panel gaps for n panels
+		if (panel_it != mPanels.begin())
 		{
-			// enforce minimize size constraint by default
-			if (panelp->getRect().getHeight() < panelp->getRelevantMinDim())
-			{
-				panelp->reshape(panelp->getRect().getWidth(), panelp->getRelevantMinDim());
-			}
-			total_height += llround(panelp->getRect().getHeight() * panelp->getCollapseFactor(mOrientation));
-			if (panel_it != mPanels.begin())
-			{
-				total_height += mPanelSpacing;
-			}
+			total_size += mPanelSpacing;
 		}
 	}
 
 	S32 num_resizable_panels = 0;
-	S32 shrink_headroom_available = 0;
-	S32 shrink_headroom_total = 0;
+	F32 shrink_headroom_available = 0.f;
+	F32 shrink_headroom_total = 0.f;
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
+		LLLayoutPanel* panelp = (*panel_it);
+
 		// panels that are not fully visible do not count towards shrink headroom
-		if ((*panel_it)->getCollapseFactor(mOrientation) < 1.f) 
+		if (panelp->getCollapseFactor() < 1.f) 
 		{
 			continue;
 		}
 
-		S32 relevant_dimension = (mOrientation == HORIZONTAL) ? (*panel_it)->getRect().getWidth() : (*panel_it)->getRect().getHeight();
-		S32 relevant_min = (*panel_it)->getRelevantMinDim();
+		F32 cur_size = panelp->mFractionalSize;
+		F32 min_size = (F32)panelp->getRelevantMinDim();
 		
 		// if currently resizing a panel or the panel is flagged as not automatically resizing
 		// only track total available headroom, but don't use it for automatic resize logic
-		if ((*panel_it)->mResizeBar->hasMouseCapture() 
-			|| (!(*panel_it)->mAutoResize 
+		if (panelp->mResizeBar->hasMouseCapture() 
+			|| (!panelp->mAutoResize 
 				&& !force_resize))
 		{
-			shrink_headroom_total += relevant_dimension - relevant_min;
+			shrink_headroom_total += cur_size - min_size;
 		}
 		else
 		{
 			num_resizable_panels++;
 			
-			shrink_headroom_available += relevant_dimension - relevant_min;
-			shrink_headroom_total += relevant_dimension - relevant_min;
+			shrink_headroom_available += cur_size - min_size;
+			shrink_headroom_total += cur_size - min_size;
 		}
 	}
 
 	// calculate how many pixels need to be distributed among layout panels
 	// positive means panels need to grow, negative means shrink
-	S32 pixels_to_distribute;
-	if (mOrientation == HORIZONTAL)
-	{
-		pixels_to_distribute = getRect().getWidth() - total_width;
-	}
-	else //VERTICAL
-	{
-		pixels_to_distribute = getRect().getHeight() - total_height;
-	}
+	F32 pixels_to_distribute = (mOrientation == HORIZONTAL)
+							? getRect().getWidth() - total_size
+							: getRect().getHeight() - total_size;
 
 	// now we distribute the pixels...
-	S32 cur_x = 0;
-	S32 cur_y = getRect().getHeight();
+	F32 cur_x = 0.f;
+	F32 cur_y = (F32)getRect().getHeight();
 
 	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
 		LLLayoutPanel* panelp = (*panel_it);
 
-		S32 cur_width = panelp->getRect().getWidth();
-		S32 cur_height = panelp->getRect().getHeight();
-		S32 new_width = cur_width;
-		S32 new_height = cur_height;
-		S32 relevant_min = panelp->getRelevantMinDim();
-
-		if (mOrientation == HORIZONTAL)
-		{
-			new_width = llmax(relevant_min, new_width);
-		}
-		else
-		{
-			new_height = llmax(relevant_min, new_height);
-		}
-		S32 delta_size = 0;
+		F32 min_size = panelp->getRelevantMinDim();
+		F32 delta_size = 0.f;
 
 		// if panel can automatically resize (not animating, and resize flag set)...
-		if (panelp->getCollapseFactor(mOrientation) == 1.f 
+		if (panelp->getCollapseFactor() == 1.f 
 			&& (force_resize || panelp->mAutoResize) 
 			&& !panelp->mResizeBar->hasMouseCapture()) 
 		{
-			if (mOrientation == HORIZONTAL)
+			if (pixels_to_distribute < 0.f)
 			{
-				// if we're shrinking
-				if (pixels_to_distribute < 0)
-				{
-					// shrink proportionally to amount over minimum
-					// so we can do this in one pass
-					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_width - relevant_min) / (F32)shrink_headroom_available)) : 0;
-					shrink_headroom_available -= (cur_width - relevant_min);
-				}
-				else
-				{
-					// grow all elements equally
-					delta_size = llround((F32)pixels_to_distribute / (F32)num_resizable_panels);
-					num_resizable_panels--;
-				}
-				pixels_to_distribute -= delta_size;
-				new_width = llmax(relevant_min, cur_width + delta_size);
+				// shrink proportionally to amount over minimum
+				// so we can do this in one pass
+				delta_size = (shrink_headroom_available > 0.f) 
+					? pixels_to_distribute * ((F32)(panelp->mFractionalSize - min_size) / shrink_headroom_available) 
+					: 0.f;
+				shrink_headroom_available -= (panelp->mFractionalSize - min_size);
 			}
 			else
 			{
-				new_width = getDefaultWidth(new_width);
-			}
-
-			if (mOrientation == VERTICAL)
-			{
-				if (pixels_to_distribute < 0)
-				{
-					// shrink proportionally to amount over minimum
-					// so we can do this in one pass
-					delta_size = (shrink_headroom_available > 0) ? llround((F32)pixels_to_distribute * ((F32)(cur_height - relevant_min) / (F32)shrink_headroom_available)) : 0;
-					shrink_headroom_available -= (cur_height - relevant_min);
-				}
-				else
-				{
-					delta_size = llround((F32)pixels_to_distribute / (F32)num_resizable_panels);
-					num_resizable_panels--;
-				}
-				pixels_to_distribute -= delta_size;
-				new_height = llmax(relevant_min, cur_height + delta_size);
-			}
-			else
-			{
-				new_height = getDefaultHeight(new_height);
-			}
-		}
-		else
-		{
-			if (mOrientation == HORIZONTAL)
-			{
-				new_height = getDefaultHeight(new_height);
-			}
-			else // VERTICAL
-			{
-				new_width = getDefaultWidth(new_width);
+				// grow all elements equally
+				delta_size = pixels_to_distribute / (F32)num_resizable_panels;
+				num_resizable_panels--;
 			}
+			
+			panelp->mFractionalSize = llmax(min_size, panelp->mFractionalSize + delta_size);
+			pixels_to_distribute -= delta_size;
 		}
 
 		// adjust running headroom count based on new sizes
 		shrink_headroom_total += delta_size;
 
 		LLRect panel_rect;
-		panel_rect.setLeftTopAndSize(cur_x, cur_y, new_width, new_height);
+		if (mOrientation == HORIZONTAL)
+		{
+			panel_rect.setLeftTopAndSize(llround(cur_x), 
+										llround(cur_y), 
+										llround(panelp->mFractionalSize), 
+										getRect().getHeight());
+		}
+		else
+		{
+			panel_rect.setLeftTopAndSize(llround(cur_x), 
+										llround(cur_y), 
+										getRect().getWidth(), 
+										llround(panelp->mFractionalSize));
+		}
 		panelp->setShape(panel_rect);
 
 		LLRect resize_bar_rect = panel_rect;
@@ -549,13 +476,14 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 		}
 		(*panel_it)->mResizeBar->setRect(resize_bar_rect);
 
+		F32 size = ((*panel_it)->mFractionalSize * (*panel_it)->getCollapseFactor()) + (F32)mPanelSpacing;
 		if (mOrientation == HORIZONTAL)
 		{
-			cur_x += llround(new_width * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
+			cur_x += size;
 		}
 		else //VERTICAL
 		{
-			cur_y -= llround(new_height * (*panel_it)->getCollapseFactor(mOrientation)) + mPanelSpacing;
+			cur_y -= size;
 		}
 	}
 
@@ -570,13 +498,13 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 		{
 			(*panel_it)->mResizeBar->setResizeLimits(
 				relevant_min, 
-				relevant_min + shrink_headroom_total);
+				relevant_min + llround(shrink_headroom_total));
 		}
 		else //VERTICAL
 		{
 			(*panel_it)->mResizeBar->setResizeLimits(
 				relevant_min, 
-				relevant_min + shrink_headroom_total);
+				relevant_min + llround(shrink_headroom_total));
 		}
 
 		// toggle resize bars based on panel visibility, resizability, etc
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index d8ef0aeaca..5d79505fc3 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -126,8 +126,6 @@ protected:
 private:
 	void createResizeBars();
 	void calcMinExtents();
-	S32 getDefaultHeight(S32 cur_height);
-	S32 getDefaultWidth(S32 cur_width);
 
 	const ELayoutOrientation mOrientation;
 
@@ -181,6 +179,8 @@ public:
 
 	void initFromParams(const Params& p);
 
+	void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
+
 	S32 getMinDim() const { return mMinDim; }
 	void setMinDim(S32 value) { mMinDim = value; if (!mExpandedMinDimSpecified) mExpandedMinDim = value; }
 
@@ -202,22 +202,26 @@ public:
 		return min_dim;
 	}
 
+	void setOrientation(LLLayoutStack::ELayoutOrientation orientation) { mOrientation = orientation; }
+
 protected:
 	LLLayoutPanel(const Params& p);
 	
-	F32 getCollapseFactor(LLLayoutStack::ELayoutOrientation orientation);
+	F32 getCollapseFactor();
 
-	bool mExpandedMinDimSpecified;
-	S32 mExpandedMinDim;
+	bool	mExpandedMinDimSpecified;
+	S32		mExpandedMinDim;
 	
-	S32 mMinDim;
-	S32 mMaxDim;
-	BOOL mAutoResize;
-	BOOL mUserResize;
-	BOOL mCollapsed;
+	S32		mMinDim;
+	S32		mMaxDim;
+	bool	mAutoResize;
+	bool	mUserResize;
+	bool	mCollapsed;
+	F32		mVisibleAmt;
+	F32		mCollapseAmt;
+	F32		mFractionalSize;
+	LLLayoutStack::ELayoutOrientation mOrientation;
 	class LLResizeBar* mResizeBar;
-	F32 mVisibleAmt;
-	F32 mCollapseAmt;
 };
 
 
diff --git a/indra/llui/lllineeditor.h b/indra/llui/lllineeditor.h
index 583bde360a..2518dbe3c7 100644
--- a/indra/llui/lllineeditor.h
+++ b/indra/llui/lllineeditor.h
@@ -60,7 +60,7 @@ public:
 
 	typedef boost::function<void (LLLineEditor* caller)> keystroke_callback_t;
 	
-	struct MaxLength : public LLInitParam::Choice<MaxLength>
+	struct MaxLength : public LLInitParam::ChoiceBlock<MaxLength>
 	{
 		Alternative<S32> bytes, chars;
 		
diff --git a/indra/llui/llloadingindicator.cpp b/indra/llui/llloadingindicator.cpp
index c4eec1835c..6ac38f5ad4 100644
--- a/indra/llui/llloadingindicator.cpp
+++ b/indra/llui/llloadingindicator.cpp
@@ -34,6 +34,7 @@
 // Project includes
 #include "lluictrlfactory.h"
 #include "lluiimage.h"
+#include "boost/foreach.hpp"
 
 // registered in llui.cpp to avoid being left out by MS linker
 //static LLDefaultChildRegistry::Register<LLLoadingIndicator> r("loading_indicator");
@@ -51,11 +52,9 @@ LLLoadingIndicator::LLLoadingIndicator(const Params& p)
 
 void LLLoadingIndicator::initFromParams(const Params& p)
 {
-	for (LLInitParam::ParamIterator<LLUIImage*>::const_iterator it = p.images().image.begin(), end_it = p.images().image.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(LLUIImage* image, p.images.image)
 	{
-		mImages.push_back(it->getValue());
+		mImages.push_back(image);
 	}
 
 	// Start timer for switching images.
diff --git a/indra/llui/llloadingindicator.h b/indra/llui/llloadingindicator.h
index 7c44478848..c1f979c111 100644
--- a/indra/llui/llloadingindicator.h
+++ b/indra/llui/llloadingindicator.h
@@ -51,7 +51,7 @@ class LLLoadingIndicator
 	LOG_CLASS(LLLoadingIndicator);
 public:
 
-	struct Images : public LLInitParam::Block<Images>
+	struct Images : public LLInitParam::BatchBlock<Images>
 	{
 		Multiple<LLUIImage*>	image;
 
@@ -63,7 +63,7 @@ public:
 	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
 	{
 		Optional<F32>			images_per_sec;
-		Batch<Images>			images;
+		Optional<Images>		images;
 
 		Params()
 		:	images_per_sec("images_per_sec", 1.0f),
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index 6cac841cde..3ef8d8ff35 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -947,7 +947,7 @@ LLMenuItemBranchGL::LLMenuItemBranchGL(const LLMenuItemBranchGL::Params& p)
 
 LLMenuItemBranchGL::~LLMenuItemBranchGL()
 {
-	LLView::deleteViewByHandle(mBranchHandle);
+	delete mBranchHandle.get();
 }
 
 // virtual
@@ -1731,7 +1731,7 @@ void LLMenuGL::setCanTearOff(BOOL tear_off)
 	{
 		LLMenuItemTearOffGL::Params p;
 		mTearOffItem = LLUICtrlFactory::create<LLMenuItemTearOffGL>(p);
-		addChildInBack(mTearOffItem);
+		addChild(mTearOffItem);
 	}
 	else if (!tear_off && mTearOffItem != NULL)
 	{
diff --git a/indra/llui/llnotifications.cpp b/indra/llui/llnotifications.cpp
index ffe5908a9d..8f7025a9a6 100644
--- a/indra/llui/llnotifications.cpp
+++ b/indra/llui/llnotifications.cpp
@@ -46,6 +46,7 @@
 
 #include <algorithm>
 #include <boost/regex.hpp>
+#include <boost/foreach.hpp>
 
 
 const std::string NOTIFICATION_PERSIST_VERSION = "0.93";
@@ -416,23 +417,17 @@ LLNotificationTemplate::LLNotificationTemplate(const LLNotificationTemplate::Par
 		mSoundEffect = LLUUID(LLUI::sSettingGroups["config"]->getString(p.sound));
 	}
 
-	for(LLInitParam::ParamIterator<LLNotificationTemplate::UniquenessContext>::const_iterator it = p.unique.contexts.begin(),
-			end_it = p.unique.contexts.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(const LLNotificationTemplate::UniquenessContext& context, p.unique.contexts)
 	{
-		mUniqueContext.push_back(it->value);
+		mUniqueContext.push_back(context.value);
 	}
 	
 	lldebugs << "notification \"" << mName << "\": tag count is " << p.tags.size() << llendl;
 	
-	for(LLInitParam::ParamIterator<LLNotificationTemplate::Tag>::const_iterator it = p.tags.begin(),
-			end_it = p.tags.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(const LLNotificationTemplate::Tag& tag, p.tags)
 	{
-		lldebugs << "    tag \"" << std::string(it->value) << "\"" << llendl;
-		mTags.push_back(it->value);
+		lldebugs << "    tag \"" << std::string(tag.value) << "\"" << llendl;
+		mTags.push_back(tag.value);
 	}
 
 	mForm = LLNotificationFormPtr(new LLNotificationForm(p.name, p.form_ref.form));
@@ -1397,14 +1392,12 @@ void replaceFormText(LLNotificationForm::Params& form, const std::string& patter
 	{
 		form.ignore.text = replace;
 	}
-	for (LLInitParam::ParamIterator<LLNotificationForm::FormElement>::iterator it = form.form_elements.elements.begin(),
-			end_it = form.form_elements.elements.end();
-		it != end_it;
-		++it)
+
+	BOOST_FOREACH(LLNotificationForm::FormElement& element, form.form_elements.elements)
 	{
-		if (it->button.isChosen() && it->button.text() == pattern)
+		if (element.button.isChosen() && element.button.text() == pattern)
 		{
-			it->button.text = replace;
+			element.button.text = replace;
 		}
 	}
 }
@@ -1453,48 +1446,42 @@ bool LLNotifications::loadTemplates()
 
 	mTemplates.clear();
 
-	for(LLInitParam::ParamIterator<LLNotificationTemplate::GlobalString>::const_iterator it = params.strings.begin(), end_it = params.strings.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(LLNotificationTemplate::GlobalString& string, params.strings)
 	{
-		mGlobalStrings[it->name] = it->value;
+		mGlobalStrings[string.name] = string.value;
 	}
 
 	std::map<std::string, LLNotificationForm::Params> form_templates;
 
-	for(LLInitParam::ParamIterator<LLNotificationTemplate::Template>::const_iterator it = params.templates.begin(), end_it = params.templates.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(LLNotificationTemplate::Template& notification_template, params.templates)
 	{
-		form_templates[it->name] = it->form;
+		form_templates[notification_template.name] = notification_template.form;
 	}
 
-	for(LLInitParam::ParamIterator<LLNotificationTemplate::Params>::iterator it = params.notifications.begin(), end_it = params.notifications.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(LLNotificationTemplate::Params& notification, params.notifications)
 	{
-		if (it->form_ref.form_template.isChosen())
+		if (notification.form_ref.form_template.isChosen())
 		{
 			// replace form contents from template
-			it->form_ref.form = form_templates[it->form_ref.form_template.name];
-			if(it->form_ref.form_template.yes_text.isProvided())
+			notification.form_ref.form = form_templates[notification.form_ref.form_template.name];
+			if(notification.form_ref.form_template.yes_text.isProvided())
 			{
-				replaceFormText(it->form_ref.form, "$yestext", it->form_ref.form_template.yes_text);
+				replaceFormText(notification.form_ref.form, "$yestext", notification.form_ref.form_template.yes_text);
 			}
-			if(it->form_ref.form_template.no_text.isProvided())
+			if(notification.form_ref.form_template.no_text.isProvided())
 			{
-				replaceFormText(it->form_ref.form, "$notext", it->form_ref.form_template.no_text);
+				replaceFormText(notification.form_ref.form, "$notext", notification.form_ref.form_template.no_text);
 			}
-			if(it->form_ref.form_template.cancel_text.isProvided())
+			if(notification.form_ref.form_template.cancel_text.isProvided())
 			{
-				replaceFormText(it->form_ref.form, "$canceltext", it->form_ref.form_template.cancel_text);
+				replaceFormText(notification.form_ref.form, "$canceltext", notification.form_ref.form_template.cancel_text);
 			}
-			if(it->form_ref.form_template.ignore_text.isProvided())
+			if(notification.form_ref.form_template.ignore_text.isProvided())
 			{
-				replaceFormText(it->form_ref.form, "$ignoretext", it->form_ref.form_template.ignore_text);
+				replaceFormText(notification.form_ref.form, "$ignoretext", notification.form_ref.form_template.ignore_text);
 			}
 		}
-		mTemplates[it->name] = LLNotificationTemplatePtr(new LLNotificationTemplate(*it));
+		mTemplates[notification.name] = LLNotificationTemplatePtr(new LLNotificationTemplate(notification));
 	}
 
 	return true;
@@ -1517,12 +1504,9 @@ bool LLNotifications::loadVisibilityRules()
 
 	mVisibilityRules.clear();
 
-	for(LLInitParam::ParamIterator<LLNotificationVisibilityRule::Rule>::iterator it = params.rules.begin(), 
-			end_it = params.rules.end();
-		it != end_it;
-		++it)
+	BOOST_FOREACH(LLNotificationVisibilityRule::Rule& rule, params.rules)
 	{
-		mVisibilityRules.push_back(LLNotificationVisibilityRulePtr(new LLNotificationVisibilityRule(*it)));
+		mVisibilityRules.push_back(LLNotificationVisibilityRulePtr(new LLNotificationVisibilityRule(rule)));
 	}
 
 	return true;
diff --git a/indra/llui/llnotifications.h b/indra/llui/llnotifications.h
index 0c4d4fc897..462d69be2e 100644
--- a/indra/llui/llnotifications.h
+++ b/indra/llui/llnotifications.h
@@ -201,7 +201,7 @@ public:
 		FormInput();
 	};
 
-	struct FormElement : public LLInitParam::Choice<FormElement>
+	struct FormElement : public LLInitParam::ChoiceBlock<FormElement>
 	{
 		Alternative<FormButton> button;
 		Alternative<FormInput>	input;
@@ -312,7 +312,7 @@ public:
 		Optional<LLNotificationContext*>		context;
 		Optional<void*>							responder;
 
-		struct Functor : public LLInitParam::Choice<Functor>
+		struct Functor : public LLInitParam::ChoiceBlock<Functor>
 		{
 			Alternative<std::string>										name;
 			Alternative<LLNotificationFunctorRegistry::ResponseFunctor>	function;
diff --git a/indra/llui/llnotificationtemplate.h b/indra/llui/llnotificationtemplate.h
index ab777d37a5..fb50c9c123 100644
--- a/indra/llui/llnotificationtemplate.h
+++ b/indra/llui/llnotificationtemplate.h
@@ -91,7 +91,7 @@ struct LLNotificationTemplate
 		// <notification> <unique/> </notification>
 		// as well as
 		// <notification> <unique> <context></context> </unique>...
-		Flag			dummy_val;
+		Optional<LLInitParam::Flag>	dummy_val;
 	public:
 		Multiple<UniquenessContext>	contexts;
 
@@ -147,7 +147,7 @@ struct LLNotificationTemplate
 		{}
 	};
 
-	struct FormRef : public LLInitParam::Choice<FormRef>
+	struct FormRef : public LLInitParam::ChoiceBlock<FormRef>
 	{
 		Alternative<LLNotificationForm::Params>		form;
 		Alternative<TemplateRef>					form_template;
diff --git a/indra/llui/llnotificationvisibilityrule.h b/indra/llui/llnotificationvisibilityrule.h
index 78bdec2a8f..78788a275c 100644
--- a/indra/llui/llnotificationvisibilityrule.h
+++ b/indra/llui/llnotificationvisibilityrule.h
@@ -59,7 +59,7 @@ struct LLNotificationVisibilityRule
 		{}
 	};
 
-	struct Rule : public LLInitParam::Choice<Rule>
+	struct Rule : public LLInitParam::ChoiceBlock<Rule>
 	{
 		Alternative<Filter>		show;
 		Alternative<Filter>		hide;
diff --git a/indra/llui/llpanel.h b/indra/llui/llpanel.h
index 790025cb2d..ab1c87caff 100644
--- a/indra/llui/llpanel.h
+++ b/indra/llui/llpanel.h
@@ -96,9 +96,6 @@ public:
 		Params();
 	};
 
-	// valid children for LLPanel are stored in this registry
-	typedef LLDefaultChildRegistry child_registry_t;
-
 protected:
 	friend class LLUICtrlFactory;
 	// RN: for some reason you can't just use LLUICtrlFactory::getDefaultParams as a default argument in VC8
diff --git a/indra/llui/llresizehandle.h b/indra/llui/llresizehandle.h
index 531eb1db61..7541b9e6c0 100644
--- a/indra/llui/llresizehandle.h
+++ b/indra/llui/llresizehandle.h
@@ -55,7 +55,7 @@ public:
 	virtual BOOL	handleMouseUp(S32 x, S32 y, MASK mask);
 
 	void			setResizeLimits( S32 min_width, S32 min_height ) { mMinWidth = min_width; mMinHeight = min_height; }
-
+	
 private:
 	BOOL			pointInHandle( S32 x, S32 y );
 
diff --git a/indra/llui/llscrolllistcolumn.h b/indra/llui/llscrolllistcolumn.h
index 12baea8e0c..b4d4a6d05e 100644
--- a/indra/llui/llscrolllistcolumn.h
+++ b/indra/llui/llscrolllistcolumn.h
@@ -95,7 +95,7 @@ public:
 		Optional<ESortDirection, SortNames>	sort_direction;
 		Optional<bool>						sort_ascending;
 
-		struct Width : public LLInitParam::Choice<Width>
+		struct Width : public LLInitParam::ChoiceBlock<Width>
 		{
 			Alternative<bool>	dynamic_width;
 			Alternative<S32>		pixel_width;
@@ -112,7 +112,7 @@ public:
 		Optional<Width>						width;
 
 		// either an image or label is used in column header
-		struct Header : public LLInitParam::Choice<Header>
+		struct Header : public LLInitParam::ChoiceBlock<Header>
 		{
 			Alternative<std::string>			label;
 			Alternative<LLUIImage*>			image;
diff --git a/indra/llui/llsdparam.cpp b/indra/llui/llsdparam.cpp
index 04919e6991..6fa90933a4 100644
--- a/indra/llui/llsdparam.cpp
+++ b/indra/llui/llsdparam.cpp
@@ -34,6 +34,7 @@
 static 	LLInitParam::Parser::parser_read_func_map_t sReadFuncs;
 static 	LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
 static 	LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
+static const LLSD NO_VALUE_MARKER;
 
 //
 // LLParamSDParser
@@ -45,7 +46,7 @@ LLParamSDParser::LLParamSDParser()
 
 	if (sReadFuncs.empty())
 	{
-		registerParserFuncs<LLInitParam::NoParamValue>(readNoValue, &LLParamSDParser::writeNoValue);
+		registerParserFuncs<LLInitParam::Flag>(readFlag, &LLParamSDParser::writeFlag);
 		registerParserFuncs<S32>(readS32, &LLParamSDParser::writeTypedValue<S32>);
 		registerParserFuncs<U32>(readU32, &LLParamSDParser::writeU32Param);
 		registerParserFuncs<F32>(readF32, &LLParamSDParser::writeTypedValue<F32>);
@@ -60,29 +61,34 @@ LLParamSDParser::LLParamSDParser()
 }
 
 // special case handling of U32 due to ambiguous LLSD::assign overload
-bool LLParamSDParser::writeU32Param(LLParamSDParser::parser_t& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
+bool LLParamSDParser::writeU32Param(LLParamSDParser::parser_t& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
 {
 	LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
 	if (!sdparser.mWriteRootSD) return false;
 	
-	LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
-	if (!sd_to_write) return false;
+	parser_t::name_stack_range_t range(name_stack.begin(), name_stack.end());
+	LLSD& sd_to_write = LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
+	sd_to_write.assign((S32)*((const U32*)val_ptr));
 
-	sd_to_write->assign((S32)*((const U32*)val_ptr));
 	return true;
 }
 
-bool LLParamSDParser::writeNoValue(LLParamSDParser::parser_t& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
+bool LLParamSDParser::writeFlag(LLParamSDParser::parser_t& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
 {
 	LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
 	if (!sdparser.mWriteRootSD) return false;
 
-	LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
-	if (!sd_to_write) return false;
+	parser_t::name_stack_range_t range(name_stack.begin(), name_stack.end());
+	LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
 
 	return true;
 }
 
+void LLParamSDParser::submit(LLInitParam::BaseBlock& block, const LLSD& sd, LLInitParam::Parser::name_stack_t& name_stack)
+{
+	mCurReadSD = &sd;
+	block.submitValue(name_stack, *this);
+}
 
 void LLParamSDParser::readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool silent)
 {
@@ -90,51 +96,17 @@ void LLParamSDParser::readSD(const LLSD& sd, LLInitParam::BaseBlock& block, bool
 	mNameStack.clear();
 	setParseSilently(silent);
 
-	readSDValues(sd, block);
+	LLParamSDParserUtilities::readSDValues(boost::bind(&LLParamSDParser::submit, this, boost::ref(block), _1, _2), sd, mNameStack);
+	//readSDValues(sd, block);
 }
 
 void LLParamSDParser::writeSD(LLSD& sd, const LLInitParam::BaseBlock& block)
 {
 	mNameStack.clear();
 	mWriteRootSD = &sd;
-	block.serializeBlock(*this);
-}
 
-const LLSD NO_VALUE_MARKER;
-
-void LLParamSDParser::readSDValues(const LLSD& sd, LLInitParam::BaseBlock& block)
-{
-	if (sd.isMap())
-	{
-		for (LLSD::map_const_iterator it = sd.beginMap();
-			it != sd.endMap();
-			++it)
-		{
-			mNameStack.push_back(make_pair(it->first, newParseGeneration()));
-			readSDValues(it->second, block);
-			mNameStack.pop_back();
-		}
-	}
-	else if (sd.isArray())
-	{
-		for (LLSD::array_const_iterator it = sd.beginArray();
-			it != sd.endArray();
-			++it)
-		{
-			mNameStack.back().second = newParseGeneration();
-			readSDValues(*it, block);
-		}
-	}
-	else if (sd.isUndefined())
-	{
-		mCurReadSD = &NO_VALUE_MARKER;
-		block.submitValue(mNameStack, *this);
-	}
-	else
-	{
-		mCurReadSD = &sd;
-		block.submitValue(mNameStack, *this);
-	}
+	name_stack_t name_stack;
+	block.serializeBlock(*this, name_stack);
 }
 
 /*virtual*/ std::string LLParamSDParser::getCurrentElementName()
@@ -150,83 +122,8 @@ void LLParamSDParser::readSDValues(const LLSD& sd, LLInitParam::BaseBlock& block
 	return full_name;
 }
 
-LLSD* LLParamSDParser::getSDWriteNode(const parser_t::name_stack_t& name_stack)
-{
-	//TODO: implement nested LLSD writing
-	LLSD* sd_to_write = mWriteRootSD;
-	bool new_traversal = false;
-	for (name_stack_t::const_iterator it = name_stack.begin(), prev_it = mNameStack.begin();
-		it != name_stack.end();
-		++it)
-	{
-		bool new_array_entry = false;
-		if (prev_it == mNameStack.end())
-		{
-			new_traversal = true;
-		}
-		else
-		{
-			if (!new_traversal						// have not diverged yet from previous trace
-				&& prev_it->first == it->first		// names match
-				&& prev_it->second != it->second)	// versions differ
-			{
-				// name stacks match, but version numbers differ in last place.
-				// create a different entry at this point using an LLSD array
-				new_array_entry = true;
-			}
-			if (prev_it->first != it->first			// names differ
-				|| prev_it->second != it->second)	// versions differ
-			{
-				// at this point we have diverged from our last trace
-				// so any elements referenced here are new
-				new_traversal = true;
-			}
-		}
-
-		LLSD* child_sd = it->first.empty() ? sd_to_write : &(*sd_to_write)[it->first];
 
-		if (child_sd->isArray())
-		{
-			if (new_traversal)
-			{
-				// write to new element at end
-				sd_to_write = &(*child_sd)[child_sd->size()];
-			}
-			else
-			{
-				// write to last of existing elements, or first element if empty
-				sd_to_write = &(*child_sd)[llmax(0, child_sd->size() - 1)];
-			}
-		}
-		else
-		{
-			if (new_array_entry && !child_sd->isArray())
-			{
-				// copy child contents into first element of an array
-				LLSD new_array = LLSD::emptyArray();
-				new_array.append(*child_sd);
-				// assign array to slot that previously held the single value
-				*child_sd = new_array;
-				// return next element in that array
-				sd_to_write = &((*child_sd)[1]);
-			}
-			else
-			{
-				sd_to_write = child_sd;
-			}
-		}
-		if (prev_it != mNameStack.end())
-		{
-			++prev_it;
-		}
-	}
-	mNameStack = name_stack;
-	
-	//llinfos << ll_pretty_print_sd(*mWriteRootSD) << llendl;
-	return sd_to_write;
-}
-
-bool LLParamSDParser::readNoValue(Parser& parser, void* val_ptr)
+bool LLParamSDParser::readFlag(Parser& parser, void* val_ptr)
 {
 	LLParamSDParser& self = static_cast<LLParamSDParser&>(parser);
 	return self.mCurReadSD == &NO_VALUE_MARKER;
@@ -312,3 +209,132 @@ bool LLParamSDParser::readSD(Parser& parser, void* val_ptr)
 	*((LLSD*)val_ptr) = *self.mCurReadSD;
     return true;
 }
+
+// static
+LLSD& LLParamSDParserUtilities::getSDWriteNode(LLSD& input, LLInitParam::Parser::name_stack_range_t& name_stack_range)
+{
+	LLSD* sd_to_write = &input;
+	
+	for (LLInitParam::Parser::name_stack_t::iterator it = name_stack_range.first;
+		it != name_stack_range.second;
+		++it)
+	{
+		bool new_traversal = it->second;
+
+		LLSD* child_sd = it->first.empty() ? sd_to_write : &(*sd_to_write)[it->first];
+
+		if (child_sd->isArray())
+		{
+			if (new_traversal)
+			{
+				// write to new element at end
+				sd_to_write = &(*child_sd)[child_sd->size()];
+			}
+			else
+			{
+				// write to last of existing elements, or first element if empty
+				sd_to_write = &(*child_sd)[llmax(0, child_sd->size() - 1)];
+			}
+		}
+		else
+		{
+			if (new_traversal 
+				&& child_sd->isDefined() 
+				&& !child_sd->isArray())
+			{
+				// copy child contents into first element of an array
+				LLSD new_array = LLSD::emptyArray();
+				new_array.append(*child_sd);
+				// assign array to slot that previously held the single value
+				*child_sd = new_array;
+				// return next element in that array
+				sd_to_write = &((*child_sd)[1]);
+			}
+			else
+			{
+				sd_to_write = child_sd;
+			}
+		}
+		it->second = false;
+	}
+	
+	return *sd_to_write;
+}
+
+//static
+void LLParamSDParserUtilities::readSDValues(read_sd_cb_t cb, const LLSD& sd, LLInitParam::Parser::name_stack_t& stack)
+{
+	if (sd.isMap())
+	{
+		for (LLSD::map_const_iterator it = sd.beginMap();
+			it != sd.endMap();
+			++it)
+		{
+			stack.push_back(make_pair(it->first, true));
+			readSDValues(cb, it->second, stack);
+			stack.pop_back();
+		}
+	}
+	else if (sd.isArray())
+	{
+		for (LLSD::array_const_iterator it = sd.beginArray();
+			it != sd.endArray();
+			++it)
+		{
+			stack.back().second = true;
+			readSDValues(cb, *it, stack);
+		}
+	}
+	else if (sd.isUndefined())
+	{
+		if (!cb.empty())
+		{
+			cb(NO_VALUE_MARKER, stack);
+		}
+	}
+	else
+	{
+		if (!cb.empty())
+		{
+			cb(sd, stack);
+		}
+	}
+}
+
+//static
+void LLParamSDParserUtilities::readSDValues(read_sd_cb_t cb, const LLSD& sd)
+{
+	LLInitParam::Parser::name_stack_t stack = LLInitParam::Parser::name_stack_t();
+	readSDValues(cb, sd, stack);
+}
+namespace LLInitParam
+{
+	// LLSD specialization
+	// block param interface
+	bool ParamValue<LLSD, TypeValues<LLSD>, false>::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name)
+	{
+		LLSD& sd = LLParamSDParserUtilities::getSDWriteNode(mValue, name_stack);
+
+		LLSD::String string;
+
+		if (p.readValue<LLSD::String>(string))
+		{
+			sd = string;
+			return true;
+		}
+		return false;
+	}
+
+	//static
+	void ParamValue<LLSD, TypeValues<LLSD>, false>::serializeElement(Parser& p, const LLSD& sd, Parser::name_stack_t& name_stack)
+	{
+		p.writeValue<LLSD::String>(sd.asString(), name_stack);
+	}
+
+	void ParamValue<LLSD, TypeValues<LLSD>, false>::serializeBlock(Parser& p, Parser::name_stack_t& name_stack, const BaseBlock* diff_block) const
+	{
+		// read from LLSD value and serialize out to parser (which could be LLSD, XUI, etc)
+		Parser::name_stack_t stack;
+		LLParamSDParserUtilities::readSDValues(boost::bind(&serializeElement, boost::ref(p), _1, _2), mValue, stack);
+	}
+}
diff --git a/indra/llui/llsdparam.h b/indra/llui/llsdparam.h
index f776c781b3..c1cfa98399 100644
--- a/indra/llui/llsdparam.h
+++ b/indra/llui/llsdparam.h
@@ -29,6 +29,16 @@
 #define LL_LLSDPARAM_H
 
 #include "llinitparam.h"
+#include "boost/function.hpp"
+
+struct LLParamSDParserUtilities
+{
+	static LLSD& getSDWriteNode(LLSD& input, LLInitParam::Parser::name_stack_range_t& name_stack_range);
+
+	typedef boost::function<void (const LLSD&, LLInitParam::Parser::name_stack_t&)> read_sd_cb_t;
+	static void readSDValues(read_sd_cb_t cb, const LLSD& sd, LLInitParam::Parser::name_stack_t& stack);
+	static void readSDValues(read_sd_cb_t cb, const LLSD& sd);
+};
 
 class LLParamSDParser 
 :	public LLInitParam::Parser
@@ -45,27 +55,25 @@ public:
 	/*virtual*/ std::string getCurrentElementName();
 
 private:
-	void readSDValues(const LLSD& sd, LLInitParam::BaseBlock& block);
+	void submit(LLInitParam::BaseBlock& block, const LLSD& sd, LLInitParam::Parser::name_stack_t& name_stack);
 
 	template<typename T>
-	static bool writeTypedValue(Parser& parser, const void* val_ptr, const parser_t::name_stack_t& name_stack)
+	static bool writeTypedValue(Parser& parser, const void* val_ptr, parser_t::name_stack_t& name_stack)
 	{
 		LLParamSDParser& sdparser = static_cast<LLParamSDParser&>(parser);
 		if (!sdparser.mWriteRootSD) return false;
 		
-		LLSD* sd_to_write = sdparser.getSDWriteNode(name_stack);
-		if (!sd_to_write) return false;
+		LLInitParam::Parser::name_stack_range_t range(name_stack.begin(), name_stack.end());
+		LLSD& sd_to_write = LLParamSDParserUtilities::getSDWriteNode(*sdparser.mWriteRootSD, range);
 
-		sd_to_write->assign(*((const T*)val_ptr));
+		sd_to_write.assign(*((const T*)val_ptr));
 		return true;
 	}
 
-	LLSD* getSDWriteNode(const parser_t::name_stack_t& name_stack);
+	static bool writeU32Param(Parser& parser, const void* value_ptr, parser_t::name_stack_t& name_stack);
+	static bool writeFlag(Parser& parser, const void* value_ptr, parser_t::name_stack_t& name_stack);
 
-	static bool writeU32Param(Parser& parser, const void* value_ptr, const parser_t::name_stack_t& name_stack);
-	static bool writeNoValue(Parser& parser, const void* value_ptr, const parser_t::name_stack_t& name_stack);
-
-	static bool readNoValue(Parser& parser, void* val_ptr);
+	static bool readFlag(Parser& parser, void* val_ptr);
 	static bool readS32(Parser& parser, void* val_ptr);
 	static bool readU32(Parser& parser, void* val_ptr);
 	static bool readF32(Parser& parser, void* val_ptr);
@@ -85,29 +93,29 @@ private:
 
 template<typename T>
 class LLSDParamAdapter : public T
+{
+public:
+	LLSDParamAdapter() {}
+	LLSDParamAdapter(const LLSD& sd)
 	{
-	public:
-		LLSDParamAdapter() {}
-		LLSDParamAdapter(const LLSD& sd)
-		{
-			LLParamSDParser parser;
-			parser.readSD(sd, *this);
-		}
-
-		operator LLSD() const
-		{
-			LLParamSDParser parser;
-			LLSD sd;
-			parser.writeSD(sd, *this);
-			return sd;
-		}
+		LLParamSDParser parser;
+		parser.readSD(sd, *this);
+	}
+
+	operator LLSD() const
+	{
+		LLParamSDParser parser;
+		LLSD sd;
+		parser.writeSD(sd, *this);
+		return sd;
+	}
 		
-		LLSDParamAdapter(const T& val)
-		: T(val)
-		{
-			T::operator=(val);
-		}
-	};
+	LLSDParamAdapter(const T& val)
+	: T(val)
+	{
+		T::operator=(val);
+	}
+};
 
 #endif // LL_LLSDPARAM_H
 
diff --git a/indra/llui/lltextbase.h b/indra/llui/lltextbase.h
index 7d545a1ba6..384d9116fc 100644
--- a/indra/llui/lltextbase.h
+++ b/indra/llui/lltextbase.h
@@ -237,7 +237,7 @@ public:
 	friend class LLNormalTextSegment;
 	friend class LLUICtrlFactory;
 
-	struct LineSpacingParams : public LLInitParam::Choice<LineSpacingParams>
+	struct LineSpacingParams : public LLInitParam::ChoiceBlock<LineSpacingParams>
 	{
 		Alternative<F32>	multiple;
 		Alternative<S32>	pixels;
diff --git a/indra/llui/lltoolbar.cpp b/indra/llui/lltoolbar.cpp
new file mode 100644
index 0000000000..629c7d9bc7
--- /dev/null
+++ b/indra/llui/lltoolbar.cpp
@@ -0,0 +1,1053 @@
+/** 
+ * @file lltoolbar.cpp
+ * @author Richard Nelson
+ * @brief User customizable toolbar class
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include <boost/foreach.hpp>
+#include "lltoolbar.h"
+
+#include "llcommandmanager.h"
+#include "llmenugl.h"
+#include "lltrans.h"
+#include "llinventory.h"
+#include "lliconctrl.h"
+
+// uncomment this and remove the one in llui.cpp when there is an external reference to this translation unit
+// thanks, MSVC!
+//static LLDefaultChildRegistry::Register<LLToolBar> r1("toolbar");
+
+namespace LLToolBarEnums
+{
+	LLLayoutStack::ELayoutOrientation getOrientation(SideType sideType)
+	{
+		LLLayoutStack::ELayoutOrientation orientation = LLLayoutStack::HORIZONTAL;
+
+		if ((sideType == SIDE_LEFT) || (sideType == SIDE_RIGHT))
+		{
+			orientation = LLLayoutStack::VERTICAL;
+		}
+
+		return orientation;
+	}
+}
+
+using namespace LLToolBarEnums;
+
+
+namespace LLInitParam
+{
+	void TypeValues<ButtonType>::declareValues()
+	{
+		declare("icons_with_text",	BTNTYPE_ICONS_WITH_TEXT);
+		declare("icons_only",		BTNTYPE_ICONS_ONLY);
+	}
+
+	void TypeValues<SideType>::declareValues()
+	{
+		declare("bottom",	SIDE_BOTTOM);
+		declare("left",		SIDE_LEFT);
+		declare("right",	SIDE_RIGHT);
+		declare("top",		SIDE_TOP);
+	}
+}
+
+LLToolBar::Params::Params()
+:	button_display_mode("button_display_mode"),
+	commands("command"),
+	side("side", SIDE_TOP),
+	button_icon("button_icon"),
+	button_icon_and_text("button_icon_and_text"),
+	read_only("read_only", false),
+	wrap("wrap", true),
+	pad_left("pad_left"),
+	pad_top("pad_top"),
+	pad_right("pad_right"),
+	pad_bottom("pad_bottom"),
+	pad_between("pad_between"),
+	min_girth("min_girth"),
+	button_panel("button_panel")
+{}
+
+LLToolBar::LLToolBar(const LLToolBar::Params& p)
+:	LLUICtrl(p),
+	mReadOnly(p.read_only),
+	mButtonType(p.button_display_mode),
+	mSideType(p.side),
+	mWrap(p.wrap),
+	mNeedsLayout(false),
+	mModified(false),
+	mButtonPanel(NULL),
+	mCenteringStack(NULL),
+	mPadLeft(p.pad_left),
+	mPadRight(p.pad_right),
+	mPadTop(p.pad_top),
+	mPadBottom(p.pad_bottom),
+	mPadBetween(p.pad_between),
+	mMinGirth(p.min_girth),
+	mPopupMenuHandle(),
+	mStartDragItemCallback(NULL),
+	mHandleDragItemCallback(NULL),
+	mHandleDropCallback(NULL),
+	mDragAndDropTarget(false)
+{
+	mButtonParams[LLToolBarEnums::BTNTYPE_ICONS_WITH_TEXT] = p.button_icon_and_text;
+	mButtonParams[LLToolBarEnums::BTNTYPE_ICONS_ONLY] = p.button_icon;
+}
+
+LLToolBar::~LLToolBar()
+{
+	delete mPopupMenuHandle.get();
+}
+
+void LLToolBar::createContextMenu()
+{
+	if (!mPopupMenuHandle.get())
+	{
+		// Setup bindings specific to this instance for the context menu options
+
+		LLUICtrl::CommitCallbackRegistry::ScopedRegistrar commit_reg;
+		commit_reg.add("Toolbars.EnableSetting", boost::bind(&LLToolBar::onSettingEnable, this, _2));
+
+		LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_reg;
+		enable_reg.add("Toolbars.CheckSetting", boost::bind(&LLToolBar::isSettingChecked, this, _2));
+
+		// Create the context menu
+		LLContextMenu* menu = LLUICtrlFactory::instance().createFromFile<LLContextMenu>("menu_toolbars.xml", LLMenuGL::sMenuContainer, LLMenuHolderGL::child_registry_t::instance());
+
+		if (menu)
+		{
+			menu->setBackgroundColor(LLUIColorTable::instance().getColor("MenuPopupBgColor"));
+
+			mPopupMenuHandle = menu->getHandle();
+		}
+		else
+		{
+			llwarns << "Unable to load toolbars context menu." << llendl;
+		}
+	}
+}
+
+void LLToolBar::initFromParams(const LLToolBar::Params& p)
+{
+	// Initialize the base object
+	LLUICtrl::initFromParams(p);
+	
+	LLLayoutStack::ELayoutOrientation orientation = getOrientation(p.side);
+
+	LLLayoutStack::Params centering_stack_p;
+	centering_stack_p.name = "centering_stack";
+	centering_stack_p.rect = getLocalRect();
+	centering_stack_p.follows.flags = FOLLOWS_ALL;
+	centering_stack_p.orientation = orientation;
+	centering_stack_p.mouse_opaque = false;
+
+	mCenteringStack = LLUICtrlFactory::create<LLLayoutStack>(centering_stack_p);
+	addChild(mCenteringStack);
+	
+	LLLayoutPanel::Params border_panel_p;
+	border_panel_p.name = "border_panel";
+	border_panel_p.rect = getLocalRect();
+	border_panel_p.auto_resize = true;
+	border_panel_p.user_resize = false;
+	border_panel_p.mouse_opaque = false;
+	
+	mCenteringStack->addChild(LLUICtrlFactory::create<LLLayoutPanel>(border_panel_p));
+
+	LLLayoutPanel::Params center_panel_p;
+	center_panel_p.name = "center_panel";
+	center_panel_p.rect = getLocalRect();
+	center_panel_p.auto_resize = false;
+	center_panel_p.user_resize = false;
+	center_panel_p.mouse_opaque = false;
+	LLLayoutPanel* center_panel = LLUICtrlFactory::create<LLLayoutPanel>(center_panel_p);
+	mCenteringStack->addChild(center_panel);
+
+	LLPanel::Params button_panel_p(p.button_panel);
+	button_panel_p.rect = center_panel->getLocalRect();
+		button_panel_p.follows.flags = FOLLOWS_BOTTOM|FOLLOWS_LEFT;
+	mButtonPanel = LLUICtrlFactory::create<LLPanel>(button_panel_p);
+	center_panel->addChild(mButtonPanel);
+	
+	mCenteringStack->addChild(LLUICtrlFactory::create<LLLayoutPanel>(border_panel_p));
+
+	BOOST_FOREACH(LLCommandId id, p.commands)
+	{
+		addCommand(id);
+	}
+
+	mNeedsLayout = true;
+}
+
+bool LLToolBar::addCommand(const LLCommandId& commandId, int rank)
+{
+	LLCommand * command = LLCommandManager::instance().getCommand(commandId);
+	if (!command) return false;
+	
+	// Create the button and do the things that don't need ordering
+	LLToolBarButton* button = createButton(commandId);
+	mButtonPanel->addChild(button);
+	mButtonMap.insert(std::make_pair(commandId.uuid(), button));
+
+
+	// Insert the command and button in the right place in their respective lists
+	if ((rank >= mButtonCommands.size()) || (rank == RANK_NONE))
+	{
+		// In that case, back load
+		mButtonCommands.push_back(commandId);
+		mButtons.push_back(button);
+	}
+	else 
+	{
+		// Insert in place: iterate to the right spot...
+		std::list<LLToolBarButton*>::iterator it_button = mButtons.begin();
+		command_id_list_t::iterator it_command = mButtonCommands.begin();
+		while (rank > 0)
+		{
+			++it_button;
+			++it_command;
+			rank--;
+		}
+		// ...then insert
+		mButtonCommands.insert(it_command,commandId);
+		mButtons.insert(it_button,button);
+	}
+
+	mNeedsLayout = true;
+
+	return true;
+}
+
+// Remove a command from the list
+// Returns the rank of the command in the original list so that doing addCommand(id,rank) right after
+// a removeCommand(id) would leave the list unchanged.
+// Returns RANK_NONE if the command is not found in the list
+int LLToolBar::removeCommand(const LLCommandId& commandId)
+{
+	if (!hasCommand(commandId)) return RANK_NONE;
+	
+	// First erase the map record
+	command_id_map::iterator it = mButtonMap.find(commandId.uuid());
+	mButtonMap.erase(it);
+	
+	// Now iterate on the commands and buttons to identify the relevant records
+	int rank = 0;
+	std::list<LLToolBarButton*>::iterator it_button = mButtons.begin();
+	command_id_list_t::iterator it_command = mButtonCommands.begin();
+	while (*it_command != commandId)
+	{
+		++it_button;
+		++it_command;
+		++rank;
+	}
+	
+	// Delete the button and erase the command and button records
+	delete (*it_button);
+	mButtonCommands.erase(it_command);
+	mButtons.erase(it_button);
+
+	mNeedsLayout = true;
+	
+	return rank;
+}
+
+void LLToolBar::clearCommandsList()
+{
+	// Clears the commands list
+	mButtonCommands.clear();
+	// This will clear the buttons
+	createButtons();
+}
+
+bool LLToolBar::hasCommand(const LLCommandId& commandId) const
+{
+	if (commandId != LLCommandId::null)
+	{
+		command_id_map::const_iterator it = mButtonMap.find(commandId.uuid());
+		return (it != mButtonMap.end());
+	}
+
+	return false;
+}
+
+bool LLToolBar::enableCommand(const LLCommandId& commandId, bool enabled)
+{
+	LLButton * command_button = NULL;
+	
+	if (commandId != LLCommandId::null)
+	{
+		command_id_map::iterator it = mButtonMap.find(commandId.uuid());
+		if (it != mButtonMap.end())
+		{
+			it->second->setEnabled(enabled);
+		}
+	}
+
+	return (command_button != NULL);
+}
+
+BOOL LLToolBar::handleRightMouseDown(S32 x, S32 y, MASK mask)
+{
+	LLRect button_panel_rect;
+	mButtonPanel->localRectToOtherView(mButtonPanel->getLocalRect(), &button_panel_rect, this);
+	BOOL handle_it_here = !mReadOnly && button_panel_rect.pointInRect(x, y);
+
+	if (handle_it_here)
+	{
+		createContextMenu();
+
+		LLContextMenu * menu = (LLContextMenu *) mPopupMenuHandle.get();
+
+		if (menu)
+		{
+			menu->show(x, y);
+
+			LLMenuGL::showPopup(this, menu, x, y);
+		}
+	}
+
+	return handle_it_here;
+}
+
+BOOL LLToolBar::isSettingChecked(const LLSD& userdata)
+{
+	BOOL retval = FALSE;
+
+	const std::string setting_name = userdata.asString();
+
+	if (setting_name == "icons_with_text")
+	{
+		retval = (mButtonType == BTNTYPE_ICONS_WITH_TEXT);
+	}
+	else if (setting_name == "icons_only")
+	{
+		retval = (mButtonType == BTNTYPE_ICONS_ONLY);
+	}
+
+	return retval;
+}
+
+void LLToolBar::onSettingEnable(const LLSD& userdata)
+{
+	llassert(!mReadOnly);
+
+	const std::string setting_name = userdata.asString();
+
+	if (setting_name == "icons_with_text")
+	{
+		setButtonType(BTNTYPE_ICONS_WITH_TEXT);
+	}
+	else if (setting_name == "icons_only")
+	{
+		setButtonType(BTNTYPE_ICONS_ONLY);
+	}
+}
+
+void LLToolBar::setButtonType(LLToolBarEnums::ButtonType button_type)
+{
+	bool regenerate_buttons = (mButtonType != button_type);
+	
+	mButtonType = button_type;
+
+	if (regenerate_buttons)
+	{
+		createButtons();
+	}
+}
+
+void LLToolBar::resizeButtonsInRow(std::vector<LLToolBarButton*>& buttons_in_row, S32 max_row_girth)
+{
+	// make buttons in current row all same girth
+	BOOST_FOREACH(LLToolBarButton* button, buttons_in_row)
+	{
+		if (getOrientation(mSideType) == LLLayoutStack::HORIZONTAL)
+		{
+			button->reshape(button->mWidthRange.clamp(button->getRect().getWidth()), max_row_girth);
+		}
+		else // VERTICAL
+		{
+			button->reshape(max_row_girth, button->getRect().getHeight());
+		}
+	}
+}
+
+// Returns the position of the coordinates as a rank in the button list. 
+// The rank is the position a tool dropped in (x,y) would assume in the button list.
+// The returned value is between 0 and mButtons.size(), 0 being the first element to the left
+// (or top) and mButtons.size() the last one to the right (or bottom).
+// Various drag data are stored in the toolbar object though are not exposed outside (and shouldn't).
+int LLToolBar::getRankFromPosition(S32 x, S32 y)
+{
+	if (mButtons.empty())
+	{
+		return RANK_NONE;
+	}
+	
+	int rank = 0;
+
+	// Convert the toolbar coord into button panel coords
+	LLLayoutStack::ELayoutOrientation orientation = getOrientation(mSideType);
+	S32 button_panel_x = 0;
+	S32 button_panel_y = 0;
+	localPointToOtherView(x, y, &button_panel_x, &button_panel_y, mButtonPanel);
+	S32 dx = x - button_panel_x;
+	S32 dy = y - button_panel_y;
+	
+	// Simply compare the passed coord with the buttons outbound box + padding
+	std::list<LLToolBarButton*>::iterator it_button = mButtons.begin();
+	std::list<LLToolBarButton*>::iterator end_button = mButtons.end();
+	LLRect button_rect;
+	while (it_button != end_button)
+	{
+		button_rect = (*it_button)->getRect();
+		S32 point_x = button_rect.mRight + mPadRight;
+		S32 point_y = button_rect.mBottom - mPadBottom;
+
+		if ((button_panel_x < point_x) && (button_panel_y > point_y))
+		{
+			break;
+		}
+		rank++;
+		++it_button;
+	}
+	
+	// Update the passed coordinates to the hit button relevant corner 
+	// (different depending on toolbar orientation)
+	if (rank < mButtons.size())
+	{
+		if (orientation == LLLayoutStack::HORIZONTAL)
+		{
+			// Horizontal
+			S32 mid_point = (button_rect.mRight + button_rect.mLeft) / 2;
+			if (button_panel_x < mid_point)
+			{
+		mDragx = button_rect.mLeft - mPadLeft;
+		mDragy = button_rect.mTop + mPadTop;
+	}
+	else
+	{
+				rank++;
+				mDragx = button_rect.mRight + mPadRight - 1;
+				mDragy = button_rect.mTop + mPadTop;
+			}
+		}
+		else
+		{
+			// Vertical
+			S32 mid_point = (button_rect.mTop + button_rect.mBottom) / 2;
+			if (button_panel_y > mid_point)
+			{
+				mDragx = button_rect.mLeft - mPadLeft;
+				mDragy = button_rect.mTop + mPadTop;
+			}
+			else
+			{
+				rank++;
+				mDragx = button_rect.mLeft - mPadLeft;
+				mDragy = button_rect.mBottom - mPadBottom + 1;
+			}
+		}
+	}
+	else
+	{
+		// We hit passed the end of the list so put the insertion point at the end
+		if (orientation == LLLayoutStack::HORIZONTAL)
+	{
+			mDragx = button_rect.mRight + mPadRight;
+			mDragy = button_rect.mTop + mPadTop;
+	}
+	else
+	{
+			mDragx = button_rect.mLeft - mPadLeft;
+			mDragy = button_rect.mBottom - mPadBottom;
+		}
+	}
+
+	// Update the "girth" of the caret, i.e. the width or height (depending of orientation)
+	if (orientation == LLLayoutStack::HORIZONTAL)
+	{
+		mDragGirth = button_rect.getHeight() + mPadBottom + mPadTop;
+	}
+	else
+	{
+		mDragGirth = button_rect.getWidth() + mPadLeft + mPadRight;
+	}
+
+	// The delta account for the coord model change (i.e. convert back to toolbar coord)
+	mDragx += dx;
+	mDragy += dy;
+	
+	return rank;
+}
+
+int LLToolBar::getRankFromPosition(const LLCommandId& id)
+{
+	if (!hasCommand(id))
+	{
+		return RANK_NONE;
+	}
+	int rank = 0;
+	std::list<LLToolBarButton*>::iterator it_button = mButtons.begin();
+	std::list<LLToolBarButton*>::iterator end_button = mButtons.end();
+	while (it_button != end_button)
+	{
+		if ((*it_button)->mId == id)
+		{
+			break;
+		}
+		rank++;
+		++it_button;
+	}
+	return rank;
+}
+
+void LLToolBar::updateLayoutAsNeeded()
+{
+	if (!mNeedsLayout) return;
+
+	LLLayoutStack::ELayoutOrientation orientation = getOrientation(mSideType);
+	
+	// our terminology for orientation-agnostic layout is such that
+	// length refers to a distance in the direction we stack the buttons 
+	// and girth refers to a distance in the direction buttons wrap
+	S32 max_row_girth = 0;
+	S32 max_row_length = 0;
+
+	S32 max_length;
+	S32 max_total_girth;
+	S32 cur_start;
+	S32 cur_row ;
+	S32 row_pad_start;
+	S32 row_pad_end;
+	S32 girth_pad_end;
+	S32 row_running_length;
+
+	if (orientation == LLLayoutStack::HORIZONTAL)
+	{
+		max_length = getRect().getWidth() - mPadLeft - mPadRight;
+		max_total_girth = getRect().getHeight() - mPadTop - mPadBottom;
+		row_pad_start = mPadLeft;
+		row_pad_end = mPadRight;
+		cur_row = mPadTop;
+		girth_pad_end = mPadBottom;
+	}
+	else // VERTICAL
+	{
+		max_length = getRect().getHeight() - mPadTop - mPadBottom;
+		max_total_girth = getRect().getWidth() - mPadLeft - mPadRight;
+		row_pad_start = mPadTop;
+		row_pad_end = mPadBottom;
+		cur_row = mPadLeft;
+		girth_pad_end = mPadRight;
+	}
+	
+	row_running_length = row_pad_start;
+	cur_start = row_pad_start;
+
+
+	LLRect panel_rect = mButtonPanel->getLocalRect();
+
+	std::vector<LLToolBarButton*> buttons_in_row;
+
+	BOOST_FOREACH(LLToolBarButton* button, mButtons)
+	{
+		button->reshape(button->mWidthRange.getMin(), button->mDesiredHeight);
+		button->autoResize();
+
+		S32 button_clamped_width = button->mWidthRange.clamp(button->getRect().getWidth());
+		S32 button_length = (orientation == LLLayoutStack::HORIZONTAL)
+							? button_clamped_width
+							: button->getRect().getHeight();
+		S32 button_girth = (orientation == LLLayoutStack::HORIZONTAL)
+							? button->getRect().getHeight()
+							: button_clamped_width;
+		
+		// wrap if needed
+		if (mWrap
+			&& row_running_length + button_length > max_length	// out of room...
+			&& cur_start != row_pad_start)						// ...and not first button in row
+		{
+			if (orientation == LLLayoutStack::VERTICAL)
+			{	// row girth (width in this case) is clamped to allowable button widths
+				max_row_girth = button->mWidthRange.clamp(max_row_girth);
+			}
+
+			// make buttons in current row all same girth
+			resizeButtonsInRow(buttons_in_row, max_row_girth);
+			buttons_in_row.clear();
+
+			max_row_length = llmax(max_row_length, row_running_length);
+			row_running_length = row_pad_start;
+			cur_start = row_pad_start;
+			cur_row += max_row_girth + mPadBetween;
+			max_row_girth = 0;
+		}
+
+		LLRect button_rect;
+		if (orientation == LLLayoutStack::HORIZONTAL)
+		{
+			button_rect.setLeftTopAndSize(cur_start, panel_rect.mTop - cur_row, button_clamped_width, button->getRect().getHeight());
+		}
+		else // VERTICAL
+		{
+			button_rect.setLeftTopAndSize(cur_row, panel_rect.mTop - cur_start, button_clamped_width, button->getRect().getHeight());
+		}
+		button->setShape(button_rect);
+		
+		buttons_in_row.push_back(button);
+
+		row_running_length += button_length + mPadBetween;
+		cur_start = row_running_length;
+		max_row_girth = llmax(button_girth, max_row_girth);
+	}
+
+	// final resizing in "girth" direction
+	S32 total_girth =	cur_row				// current row position...
+						+ max_row_girth		// ...incremented by size of final row...
+						+ girth_pad_end;	// ...plus padding reserved on end
+	total_girth = llmax(total_girth,mMinGirth);
+	
+	max_row_length = llmax(max_row_length, row_running_length - mPadBetween + row_pad_end);
+
+	resizeButtonsInRow(buttons_in_row, max_row_girth);
+
+	// grow and optionally shift toolbar to accommodate buttons
+	if (orientation == LLLayoutStack::HORIZONTAL)
+	{
+		if (mSideType == SIDE_TOP)
+		{ // shift down to maintain top edge
+			translate(0, getRect().getHeight() - total_girth);
+		}
+
+		reshape(getRect().getWidth(), total_girth);
+		mButtonPanel->reshape(max_row_length, total_girth);
+	}
+	else // VERTICAL
+	{
+		if (mSideType == SIDE_RIGHT)
+		{ // shift left to maintain right edge
+			translate(getRect().getWidth() - total_girth, 0);
+		}
+		
+		reshape(total_girth, getRect().getHeight());
+		mButtonPanel->reshape(total_girth, max_row_length);
+	}
+
+	// make parent fit button panel
+	mButtonPanel->getParent()->setShape(mButtonPanel->getLocalRect());
+
+	// re-center toolbar buttons
+	mCenteringStack->updateLayout();
+
+	// don't clear flag until after we've resized ourselves, to avoid laying out every frame
+	mNeedsLayout = false;
+}
+
+
+void LLToolBar::draw()
+{
+	if (mButtons.empty())
+	{
+		mButtonPanel->setVisible(FALSE);
+		mButtonPanel->setMouseOpaque(FALSE);
+	}
+	else
+	{
+		mButtonPanel->setVisible(TRUE);
+		mButtonPanel->setMouseOpaque(TRUE);
+	}
+
+	// Update enable/disable state and highlight state for editable toolbars
+	if (!mReadOnly)
+	{
+		for (toolbar_button_list::iterator btn_it = mButtons.begin(); btn_it != mButtons.end(); ++btn_it)
+		{
+			LLToolBarButton* btn = *btn_it;
+			LLCommand* command = LLCommandManager::instance().getCommand(btn->mId);
+
+			if (command && btn->mIsEnabledSignal)
+			{
+				const bool button_command_enabled = (*btn->mIsEnabledSignal)(btn, command->isEnabledParameters());
+				btn->setEnabled(button_command_enabled);
+			}
+
+			if (command && btn->mIsRunningSignal)
+			{
+				const bool button_command_running = (*btn->mIsRunningSignal)(btn, command->isRunningParameters());
+				btn->setToggleState(button_command_running);
+			}
+		}
+	}
+
+	updateLayoutAsNeeded();
+	// rect may have shifted during layout
+	LLUI::popMatrix();
+	LLUI::pushMatrix();
+	LLUI::translate((F32)getRect().mLeft, (F32)getRect().mBottom, 0.f);
+
+	// Position the caret 
+	LLIconCtrl* caret = getChild<LLIconCtrl>("caret");
+	caret->setVisible(FALSE);
+	if (mDragAndDropTarget && !mButtonCommands.empty())
+	{
+		LLRect caret_rect = caret->getRect();
+		LLRect toolbar_rect = getRect();
+		if (getOrientation(mSideType) == LLLayoutStack::HORIZONTAL)
+		{
+			caret->setRect(LLRect(mDragx-caret_rect.getWidth()/2+1,
+								  mDragy,
+								  mDragx+caret_rect.getWidth()/2+1,
+								  mDragy-mDragGirth));
+		}
+		else
+		{
+			caret->setRect(LLRect(mDragx,
+								  mDragy+caret_rect.getHeight()/2,
+								  mDragx+mDragGirth,
+								  mDragy-caret_rect.getHeight()/2));
+		}
+		caret->setVisible(TRUE);
+	}
+		
+	LLUICtrl::draw();
+	caret->setVisible(FALSE);
+	mDragAndDropTarget = false;
+}
+
+void LLToolBar::reshape(S32 width, S32 height, BOOL called_from_parent)
+{
+	LLUICtrl::reshape(width, height, called_from_parent);
+	mNeedsLayout = true;
+}
+
+void LLToolBar::createButtons()
+{
+	BOOST_FOREACH(LLToolBarButton* button, mButtons)
+	{
+		delete button;
+	}
+	mButtons.clear();
+	mButtonMap.clear();
+	
+	BOOST_FOREACH(LLCommandId& command_id, mButtonCommands)
+	{
+		LLToolBarButton* button = createButton(command_id);
+		mButtons.push_back(button);
+		mButtonPanel->addChild(button);
+		mButtonMap.insert(std::make_pair(command_id.uuid(), button));
+	}
+	mNeedsLayout = true;
+}
+
+void LLToolBarButton::callIfEnabled(LLUICtrl::commit_callback_t commit, LLUICtrl* ctrl, const LLSD& param )
+{
+	LLCommand* command = LLCommandManager::instance().getCommand(mId);
+
+	if (!mIsEnabledSignal || (*mIsEnabledSignal)(this, command->isEnabledParameters()))
+	{
+		commit(ctrl, param);
+	}
+}
+
+LLToolBarButton* LLToolBar::createButton(const LLCommandId& id)
+{
+	LLCommand* commandp = LLCommandManager::instance().getCommand(id);
+	if (!commandp) return NULL;
+
+	LLToolBarButton::Params button_p;
+	button_p.name = id.name();
+	button_p.label = LLTrans::getString(commandp->labelRef());
+	button_p.tool_tip = LLTrans::getString(commandp->tooltipRef());
+	button_p.image_overlay = LLUI::getUIImage(commandp->icon());
+	button_p.overwriteFrom(mButtonParams[mButtonType]);
+	LLToolBarButton* button = LLUICtrlFactory::create<LLToolBarButton>(button_p);
+
+	if (!mReadOnly)
+	{
+		enable_callback_t isEnabledCB;
+
+		const std::string& isEnabledFunction = commandp->isEnabledFunctionName();
+		if (isEnabledFunction.length() > 0)
+		{
+			LLUICtrl::EnableCallbackParam isEnabledParam;
+			isEnabledParam.function_name = isEnabledFunction;
+			isEnabledParam.parameter = commandp->isEnabledParameters();
+			isEnabledCB = initEnableCallback(isEnabledParam);
+
+			if (NULL == button->mIsEnabledSignal)
+			{
+				button->mIsEnabledSignal = new enable_signal_t();
+			}
+
+			button->mIsEnabledSignal->connect(isEnabledCB);
+		}
+
+		LLUICtrl::CommitCallbackParam executeParam;
+		executeParam.function_name = commandp->executeFunctionName();
+		executeParam.parameter = commandp->executeParameters();
+
+		// If we have a "stop" function then we map the command to mouse down / mouse up otherwise commit
+		const std::string& executeStopFunction = commandp->executeStopFunctionName();
+		if (executeStopFunction.length() > 0)
+		{
+			LLUICtrl::CommitCallbackParam executeStopParam;
+			executeStopParam.function_name = executeStopFunction;
+			executeStopParam.parameter = commandp->executeStopParameters();
+			LLUICtrl::commit_callback_t execute_func = initCommitCallback(executeParam);
+			LLUICtrl::commit_callback_t stop_func = initCommitCallback(executeStopParam);
+			
+			button->setMouseDownCallback(boost::bind(&LLToolBarButton::callIfEnabled, button, execute_func, _1, _2));
+			button->setMouseUpCallback(boost::bind(&LLToolBarButton::callIfEnabled, button, stop_func, _1, _2));
+		}
+		else
+		{
+			button->setCommitCallback(executeParam);
+		}
+
+
+
+		const std::string& isRunningFunction = commandp->isRunningFunctionName();
+		if (isRunningFunction.length() > 0)
+		{
+			LLUICtrl::EnableCallbackParam isRunningParam;
+			isRunningParam.function_name = isRunningFunction;
+			isRunningParam.parameter = commandp->isRunningParameters();
+			enable_signal_t::slot_type isRunningCB = initEnableCallback(isRunningParam);
+
+			if (NULL == button->mIsRunningSignal)
+			{
+				button->mIsRunningSignal = new enable_signal_t();
+			}
+
+			button->mIsRunningSignal->connect(isRunningCB);
+		}
+	}
+
+	// Drag and drop behavior must work also if provided in the Toybox and, potentially, any read-only toolbar
+	button->setStartDragCallback(mStartDragItemCallback);
+	button->setHandleDragCallback(mHandleDragItemCallback);
+
+	button->setCommandId(id);
+
+	return button;
+}
+
+BOOL LLToolBar::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
+										EDragAndDropType cargo_type,
+										void* cargo_data,
+										EAcceptance* accept,
+										std::string& tooltip_msg)
+{
+	// If we have a drop callback, that means that we can handle the drop
+	BOOL handled = (mHandleDropCallback ? TRUE : FALSE);
+	
+	// if drop is set, it's time to call the callback to get the operation done
+	if (handled && drop)
+	{
+		handled = mHandleDropCallback(cargo_data, x, y ,this);
+	}
+	
+	// We accept only single tool drop on toolbars
+	*accept = (handled ? ACCEPT_YES_SINGLE : ACCEPT_NO);
+	
+	// We'll use that flag to change the visual aspect of the toolbar target on draw()
+	mDragAndDropTarget = false;
+	
+	// Convert drag position into insert position and rank 
+	if (!isReadOnly() && handled && !drop)
+	{
+		LLInventoryItem* inv_item = (LLInventoryItem*)cargo_data;
+		LLAssetType::EType type = inv_item->getType();
+		if (type == LLAssetType::AT_WIDGET)
+		{
+			LLCommandId dragged_command(inv_item->getUUID());
+			int orig_rank = getRankFromPosition(dragged_command);
+			mDragRank = getRankFromPosition(x, y);
+			// Don't DaD if we're dragging a command on itself
+			mDragAndDropTarget = ((orig_rank != RANK_NONE) && ((mDragRank == orig_rank) || ((mDragRank-1) == orig_rank)) ? false : true);
+			//llinfos << "Merov debug : DaD, rank = " << mDragRank << ", dragged uui = " << inv_item->getUUID() << llendl; 
+			/* Do the following if you want to animate the button itself
+			LLCommandId dragged_command(inv_item->getUUID());
+			removeCommand(dragged_command);
+			addCommand(dragged_command,rank);
+			*/
+		}
+		else
+		{
+			handled = FALSE;
+		}
+	}
+	
+	return handled;
+}
+
+LLToolBarButton::LLToolBarButton(const Params& p) 
+:	LLButton(p),
+	mMouseDownX(0),
+	mMouseDownY(0),
+	mWidthRange(p.button_width),
+	mDesiredHeight(p.desired_height),
+	mId(""),
+	mIsEnabledSignal(NULL),
+	mIsRunningSignal(NULL),
+	mIsStartingSignal(NULL),
+	mIsDragged(false),
+	mStartDragItemCallback(NULL),
+	mHandleDragItemCallback(NULL),
+	mOriginalImageSelected(p.image_selected),
+	mOriginalImageUnselected(p.image_unselected),
+	mOriginalImagePressed(p.image_pressed),
+	mOriginalImagePressedSelected(p.image_pressed_selected),
+	mOriginalLabelColor(p.label_color),
+	mOriginalLabelColorSelected(p.label_color_selected),
+	mOriginalImageOverlayColor(p.image_overlay_color),
+	mOriginalImageOverlaySelectedColor(p.image_overlay_selected_color)
+{
+	mButtonFlashRate = 0.0;
+	mButtonFlashCount = 0;
+}
+
+LLToolBarButton::~LLToolBarButton()
+{
+	delete mIsEnabledSignal;
+	delete mIsRunningSignal;
+	delete mIsStartingSignal;
+}
+
+BOOL LLToolBarButton::handleMouseDown(S32 x, S32 y, MASK mask)
+{
+	mMouseDownX = x;
+	mMouseDownY = y;
+	return LLButton::handleMouseDown(x, y, mask);
+}
+
+BOOL LLToolBarButton::handleHover(S32 x, S32 y, MASK mask)
+{
+	BOOL handled = FALSE;
+		
+	S32 mouse_distance_squared = (x - mMouseDownX) * (x - mMouseDownX) + (y - mMouseDownY) * (y - mMouseDownY);
+	S32 drag_threshold = LLUI::sSettingGroups["config"]->getS32("DragAndDropDistanceThreshold");
+	if (mouse_distance_squared > drag_threshold * drag_threshold
+		&& hasMouseCapture() && 
+		mStartDragItemCallback && mHandleDragItemCallback)
+	{
+		if (!mIsDragged)
+		{
+			mStartDragItemCallback(x,y,mId.uuid());
+			mIsDragged = true;
+			handled = TRUE;
+		}
+		else 
+		{
+			handled = mHandleDragItemCallback(x,y,mId.uuid(),LLAssetType::AT_WIDGET);
+		}
+	}
+	else
+	{
+		handled = LLButton::handleHover(x, y, mask);
+	}
+	return handled;
+}
+
+void LLToolBarButton::onMouseEnter(S32 x, S32 y, MASK mask)
+{
+	LLUICtrl::onMouseEnter(x, y, mask);
+
+	// Always highlight toolbar buttons, even if they are disabled
+	if (!gFocusMgr.getMouseCapture() || gFocusMgr.getMouseCapture() == this)
+	{
+		mNeedsHighlight = TRUE;
+	}
+}
+
+void LLToolBarButton::onMouseCaptureLost()
+{
+	mIsDragged = false;
+}
+
+void LLToolBarButton::onCommit()
+{
+	LLCommand* command = LLCommandManager::instance().getCommand(mId);
+
+	if (!mIsEnabledSignal || (*mIsEnabledSignal)(this, command->isEnabledParameters()))
+	{
+		LLButton::onCommit();
+	}
+}
+
+void LLToolBarButton::reshape(S32 width, S32 height, BOOL called_from_parent)
+{
+	LLButton::reshape(mWidthRange.clamp(width), height, called_from_parent);
+}
+
+void LLToolBarButton::setEnabled(BOOL enabled)
+{
+	if (enabled)
+	{
+		mImageSelected = mOriginalImageSelected;
+		mImageUnselected = mOriginalImageUnselected;
+		mImagePressed = mOriginalImagePressed;
+		mImagePressedSelected = mOriginalImagePressedSelected;
+		mUnselectedLabelColor = mOriginalLabelColor;
+		mSelectedLabelColor = mOriginalLabelColorSelected;
+		mImageOverlayColor = mOriginalImageOverlayColor;
+		mImageOverlaySelectedColor = mOriginalImageOverlaySelectedColor;
+	}
+	else
+	{
+		mImageSelected = mImageDisabledSelected;
+		mImageUnselected = mImageDisabled;
+		mImagePressed = mImageDisabled;
+		mImagePressedSelected = mImageDisabledSelected;
+		mUnselectedLabelColor = mDisabledLabelColor;
+		mSelectedLabelColor = mDisabledSelectedLabelColor;
+		mImageOverlayColor = mImageOverlayDisabledColor;
+		mImageOverlaySelectedColor = mImageOverlayDisabledColor;
+	}
+}
+
+
+const std::string LLToolBarButton::getToolTip() const	
+{ 
+	std::string tooltip;
+	if (labelIsTruncated() || getCurrentLabel().empty())
+	{
+		return LLTrans::getString(LLCommandManager::instance().getCommand(mId)->labelRef()) + " -- " + LLView::getToolTip();
+	}
+	else
+	{
+		return LLView::getToolTip();
+	}
+}
+
+
+
+
+
+
+
+
+
diff --git a/indra/llui/lltoolbar.h b/indra/llui/lltoolbar.h
new file mode 100644
index 0000000000..616710ea70
--- /dev/null
+++ b/indra/llui/lltoolbar.h
@@ -0,0 +1,259 @@
+/** 
+ * @file lltoolbar.h
+ * @author Richard Nelson
+ * @brief User customizable toolbar class
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLTOOLBAR_H
+#define LL_LLTOOLBAR_H
+
+#include "llbutton.h"
+#include "llcommandmanager.h"
+#include "lllayoutstack.h"
+#include "lluictrl.h"
+#include "llcommandmanager.h"
+#include "llassettype.h"
+
+class LLToolBar;
+
+typedef boost::function<void (S32 x, S32 y, const LLUUID& uuid)> tool_startdrag_callback_t;
+typedef boost::function<BOOL (S32 x, S32 y, const LLUUID& uuid, LLAssetType::EType type)> tool_handledrag_callback_t;
+typedef boost::function<BOOL (void* data, S32 x, S32 y, LLToolBar* toolbar)> tool_handledrop_callback_t;
+
+class LLToolBarButton : public LLButton
+{
+	friend class LLToolBar;
+public:
+	struct Params : public LLInitParam::Block<Params, LLButton::Params>
+	{
+		Optional<LLUI::RangeS32::Params>	button_width;
+		Optional<S32>						desired_height;
+
+		Params()
+		:	button_width("button_width"),
+			desired_height("desired_height", 20)
+		{}
+
+	};
+
+	LLToolBarButton(const Params& p);
+	~LLToolBarButton();
+
+	BOOL handleMouseDown(S32 x, S32 y, MASK mask);
+	BOOL handleHover(S32 x, S32 y, MASK mask);
+	void reshape(S32 width, S32 height, BOOL called_from_parent = true);
+	void setEnabled(BOOL enabled);
+	void setCommandId(const LLCommandId& id) { mId = id; }
+
+	void setStartDragCallback(tool_startdrag_callback_t cb)   { mStartDragItemCallback  = cb; }
+	void setHandleDragCallback(tool_handledrag_callback_t cb) { mHandleDragItemCallback = cb; }
+
+	void onMouseEnter(S32 x, S32 y, MASK mask);
+	void onMouseCaptureLost();
+
+	void onCommit();
+
+	virtual const std::string getToolTip() const;		
+
+private:
+	void callIfEnabled(LLUICtrl::commit_callback_t commit, LLUICtrl* ctrl, const LLSD& param );
+
+	LLCommandId		mId;
+	S32				mMouseDownX;
+	S32				mMouseDownY;
+	LLUI::RangeS32	mWidthRange;
+	S32				mDesiredHeight;
+	bool							mIsDragged;
+	tool_startdrag_callback_t		mStartDragItemCallback;
+	tool_handledrag_callback_t		mHandleDragItemCallback;
+
+	enable_signal_t*	mIsEnabledSignal;
+	enable_signal_t*	mIsRunningSignal;
+	enable_signal_t*	mIsStartingSignal;
+	LLPointer<LLUIImage>	mOriginalImageSelected,
+							mOriginalImageUnselected,
+							mOriginalImagePressed,
+							mOriginalImagePressedSelected;
+	LLUIColor				mOriginalLabelColor,
+							mOriginalLabelColorSelected,
+							mOriginalImageOverlayColor,
+							mOriginalImageOverlaySelectedColor;
+};
+
+
+namespace LLToolBarEnums
+{
+	enum ButtonType
+	{
+		BTNTYPE_ICONS_WITH_TEXT = 0,
+		BTNTYPE_ICONS_ONLY,
+
+		BTNTYPE_COUNT
+	};
+
+	enum SideType
+	{
+		SIDE_BOTTOM,
+		SIDE_LEFT,
+		SIDE_RIGHT,
+		SIDE_TOP,
+	};
+}
+
+// NOTE: This needs to occur before Param block declaration for proper compilation.
+namespace LLInitParam
+{
+	template<>
+	struct TypeValues<LLToolBarEnums::ButtonType> : public TypeValuesHelper<LLToolBarEnums::ButtonType>
+	{
+		static void declareValues();
+	};
+
+	template<>
+	struct TypeValues<LLToolBarEnums::SideType> : public TypeValuesHelper<LLToolBarEnums::SideType>
+	{
+		static void declareValues();
+	};
+}
+
+
+class LLToolBar
+:	public LLUICtrl
+{
+public:
+	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
+	{
+		Mandatory<LLToolBarEnums::ButtonType>	button_display_mode;
+		Mandatory<LLToolBarEnums::SideType>		side;
+
+		Optional<LLToolBarButton::Params>		button_icon,
+												button_icon_and_text;
+
+		Optional<bool>							read_only,
+												wrap;
+
+		Optional<S32>							pad_left,
+												pad_top,
+												pad_right,
+												pad_bottom,
+												pad_between,
+												min_girth;
+		// get rid of this
+		Multiple<LLCommandId::Params>			commands;
+
+		Optional<LLPanel::Params>				button_panel;
+
+		Params();
+	};
+
+	// virtuals
+	void draw();
+	void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
+	int  getRankFromPosition(S32 x, S32 y);	
+	int  getRankFromPosition(const LLCommandId& id);	
+	BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);
+	virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
+								   EDragAndDropType cargo_type,
+								   void* cargo_data,
+								   EAcceptance* accept,
+								   std::string& tooltip_msg);
+	
+	static const int RANK_NONE = -1;
+	
+	bool addCommand(const LLCommandId& commandId, int rank = RANK_NONE);
+	int  removeCommand(const LLCommandId& commandId);		// Returns the rank the removed command was at, RANK_NONE if not found
+	bool hasCommand(const LLCommandId& commandId) const;
+	bool enableCommand(const LLCommandId& commandId, bool enabled);
+
+	void setStartDragCallback(tool_startdrag_callback_t cb)   { mStartDragItemCallback  = cb; }
+	void setHandleDragCallback(tool_handledrag_callback_t cb) { mHandleDragItemCallback = cb; }
+	void setHandleDropCallback(tool_handledrop_callback_t cb) { mHandleDropCallback     = cb; }
+	bool isReadOnly() const { return mReadOnly; }
+
+	LLToolBarButton* createButton(const LLCommandId& id);
+
+	bool hasButtons() const { return !mButtons.empty(); }
+	bool isModified() const { return mModified; }
+
+protected:
+	friend class LLUICtrlFactory;
+	LLToolBar(const Params&);
+	~LLToolBar();
+
+	void initFromParams(const Params&);
+	tool_startdrag_callback_t		mStartDragItemCallback;
+	tool_handledrag_callback_t		mHandleDragItemCallback;
+	tool_handledrop_callback_t		mHandleDropCallback;
+	bool							mDragAndDropTarget;
+	int								mDragRank;
+	S32								mDragx,
+									mDragy,
+									mDragGirth;
+
+public:
+	// Methods used in loading and saving toolbar settings
+	void setButtonType(LLToolBarEnums::ButtonType button_type);
+	LLToolBarEnums::ButtonType getButtonType() { return mButtonType; }
+	command_id_list_t& getCommandsList() { return mButtonCommands; }
+	void clearCommandsList();
+					   
+private:
+	void createContextMenu();
+	void updateLayoutAsNeeded();
+	void createButtons();
+	void resizeButtonsInRow(std::vector<LLToolBarButton*>& buttons_in_row, S32 max_row_girth);
+	BOOL isSettingChecked(const LLSD& userdata);
+	void onSettingEnable(const LLSD& userdata);
+
+	const bool						mReadOnly;
+
+	typedef std::list<LLToolBarButton*> toolbar_button_list;
+	toolbar_button_list				mButtons;
+	command_id_list_t				mButtonCommands;
+	typedef std::map<LLUUID, LLToolBarButton*> command_id_map;
+	command_id_map					mButtonMap;
+
+	LLToolBarEnums::ButtonType		mButtonType;
+	LLLayoutStack*					mCenteringStack;
+	LLLayoutStack*					mWrapStack;
+	LLPanel*						mButtonPanel;
+	LLToolBarEnums::SideType		mSideType;
+	
+	bool							mWrap;
+	bool							mNeedsLayout;
+	bool							mModified;
+	S32								mPadLeft,
+									mPadRight,
+									mPadTop,
+									mPadBottom,
+									mPadBetween,
+									mMinGirth;
+
+	LLToolBarButton::Params			mButtonParams[LLToolBarEnums::BTNTYPE_COUNT];
+
+	LLHandle<class LLContextMenu>			mPopupMenuHandle;
+};
+
+
+#endif  // LL_LLTOOLBAR_H
diff --git a/indra/llui/lltooltip.cpp b/indra/llui/lltooltip.cpp
index bc6461a0c2..23cdd9ad9a 100644
--- a/indra/llui/lltooltip.cpp
+++ b/indra/llui/lltooltip.cpp
@@ -200,7 +200,7 @@ LLToolTip::LLToolTip(const LLToolTip::Params& p)
 		icon_params.image_selected(imagep);
 
 		icon_params.scale_image(true);
-		icon_params.flash_color(icon_params.highlight_color());
+		icon_params.flash_color.control = "ButtonUnselectedFgColor";
 		mInfoButton  = LLUICtrlFactory::create<LLButton>(icon_params);
 		if (p.click_callback.isProvided())
 		{
diff --git a/indra/llui/llui.cpp b/indra/llui/llui.cpp
index 58ba9e05f5..79ad99a770 100644
--- a/indra/llui/llui.cpp
+++ b/indra/llui/llui.cpp
@@ -41,6 +41,7 @@
 #include "llgl.h"
 
 // Project includes
+#include "llcommandmanager.h"
 #include "llcontrol.h"
 #include "llui.h"
 #include "lluicolortable.h"
@@ -57,6 +58,7 @@
 #include "llfiltereditor.h"
 #include "llflyoutbutton.h"
 #include "llsearcheditor.h"
+#include "lltoolbar.h"
 
 // for XUIParse
 #include "llquaternion.h"
@@ -87,13 +89,14 @@ std::list<std::string> gUntranslated;
 /*static*/ LLUI::remove_popup_t	LLUI::sRemovePopupFunc;
 /*static*/ LLUI::clear_popups_t	LLUI::sClearPopupsFunc;
 
-// register filtereditor here
+// register filter editor here
 static LLDefaultChildRegistry::Register<LLFilterEditor> register_filter_editor("filter_editor");
 static LLDefaultChildRegistry::Register<LLFlyoutButton> register_flyout_button("flyout_button");
 static LLDefaultChildRegistry::Register<LLSearchEditor> register_search_editor("search_editor");
 
 // register other widgets which otherwise may not be linked in
 static LLDefaultChildRegistry::Register<LLLoadingIndicator> register_loading_indicator("loading_indicator");
+static LLDefaultChildRegistry::Register<LLToolBar> register_toolbar("toolbar");
 
 //
 // Functions
@@ -103,7 +106,7 @@ void make_ui_sound(const char* namep)
 	std::string name = ll_safe_string(namep);
 	if (!LLUI::sSettingGroups["config"]->controlExists(name))
 	{
-		llwarns << "tried to make ui sound for unknown sound name: " << name << llendl;	
+		llwarns << "tried to make UI sound for unknown sound name: " << name << llendl;	
 	}
 	else
 	{
@@ -114,12 +117,12 @@ void make_ui_sound(const char* namep)
 			{
 				if (LLUI::sSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
 				{
-					llinfos << "ui sound name: " << name << " triggered but silent (null uuid)" << llendl;	
+					llinfos << "UI sound name: " << name << " triggered but silent (null uuid)" << llendl;	
 				}				
 			}
 			else
 			{
-				llwarns << "ui sound named: " << name << " does not translate to a valid uuid" << llendl;	
+				llwarns << "UI sound named: " << name << " does not translate to a valid uuid" << llendl;	
 			}
 
 		}
@@ -127,7 +130,7 @@ void make_ui_sound(const char* namep)
 		{
 			if (LLUI::sSettingGroups["config"]->getBOOL("UISndDebugSpamToggle"))
 			{
-				llinfos << "ui sound name: " << name << llendl;	
+				llinfos << "UI sound name: " << name << llendl;	
 			}
 			LLUI::sAudioCallback(uuid);
 		}
@@ -471,7 +474,7 @@ void gl_draw_scaled_image_with_border(S32 x, S32 y, S32 width, S32 height, LLTex
 		return;
 	}
 
-	// add in offset of current image to current ui translation
+	// add in offset of current image to current UI translation
 	const LLVector3 ui_scale = gGL.getUIScale();
 	const LLVector3 ui_translation = (gGL.getUITranslation() + LLVector3(x, y, 0.f)).scaledVec(ui_scale);
 
@@ -1613,16 +1616,16 @@ void LLUI::initClass(const settings_map_t& settings,
 
 	LLUICtrl::CommitCallbackRegistry::Registrar& reg = LLUICtrl::CommitCallbackRegistry::defaultRegistrar();
 
-	// Callbacks for associating controls with floater visibilty:
-	reg.add("Floater.Toggle", boost::bind(&LLFloaterReg::toggleFloaterInstance, _2));
-	reg.add("Floater.Show", boost::bind(&LLFloaterReg::showFloaterInstance, _2));
-	reg.add("Floater.Hide", boost::bind(&LLFloaterReg::hideFloaterInstance, _2));
-	reg.add("Floater.InitToVisibilityControl", boost::bind(&LLFloaterReg::initUICtrlToFloaterVisibilityControl, _1, _2));
+	// Callbacks for associating controls with floater visibility:
+	reg.add("Floater.Toggle", boost::bind(&LLFloaterReg::toggleInstance, _2, LLSD()));
+	reg.add("Floater.ToggleOrBringToFront", boost::bind(&LLFloaterReg::toggleInstanceOrBringToFront, _2, LLSD()));
+	reg.add("Floater.Show", boost::bind(&LLFloaterReg::showInstance, _2, LLSD(), FALSE));
+	reg.add("Floater.Hide", boost::bind(&LLFloaterReg::hideInstance, _2, LLSD()));
 	
 	// Button initialization callback for toggle buttons
 	reg.add("Button.SetFloaterToggle", boost::bind(&LLButton::setFloaterToggle, _1, _2));
 	
-	// Button initialization callback for toggle buttons on dockale floaters
+	// Button initialization callback for toggle buttons on dockable floaters
 	reg.add("Button.SetDockableFloaterToggle", boost::bind(&LLButton::setDockableFloaterToggle, _1, _2));
 
 	// Display the help topic for the current context
@@ -1631,8 +1634,12 @@ void LLUI::initClass(const settings_map_t& settings,
 	// Currently unused, but kept for reference:
 	reg.add("Button.ToggleFloater", boost::bind(&LLButton::toggleFloaterAndSetToggleState, _1, _2));
 	
-	// Used by menus along with Floater.Toggle to display visibility as a checkmark
-	LLUICtrl::EnableCallbackRegistry::defaultRegistrar().add("Floater.Visible", boost::bind(&LLFloaterReg::floaterInstanceVisible, _2));
+	// Used by menus along with Floater.Toggle to display visibility as a check-mark
+	LLUICtrl::EnableCallbackRegistry::defaultRegistrar().add("Floater.Visible", boost::bind(&LLFloaterReg::instanceVisible, _2, LLSD()));
+	LLUICtrl::EnableCallbackRegistry::defaultRegistrar().add("Floater.IsOpen", boost::bind(&LLFloaterReg::instanceVisible, _2, LLSD()));
+
+	// Parse the master list of commands
+	LLCommandManager::load();
 }
 
 void LLUI::cleanupClass()
@@ -2026,12 +2033,12 @@ void LLUI::positionViewNearMouse(LLView* view, S32 spawn_x, S32 spawn_y)
 								CURSOR_HEIGHT + MOUSE_CURSOR_PADDING * 2);
 
 	S32 local_x, local_y;
-	// convert screen coordinates to tooltipview-local coordinates
+	// convert screen coordinates to tooltip view-local coordinates
 	parent->screenPointToLocal(spawn_x, spawn_y, &local_x, &local_y);
 
 	// Start at spawn position (using left/top)
 	view->setOrigin( local_x, local_y - view->getRect().getHeight());
-	// Make sure we're onscreen and not overlapping the mouse
+	// Make sure we're on-screen and not overlapping the mouse
 	view->translateIntoRectWithExclusion( virtual_window_rect, mouse_rect, FALSE );
 }
 
@@ -2100,7 +2107,7 @@ namespace LLInitParam
 
 	void ParamValue<LLUIColor, TypeValues<LLUIColor> >::updateValueFromBlock()
 	{
-		if (control.isProvided())
+		if (control.isProvided() && !control().empty())
 		{
 			updateValue(LLUIColorTable::instance().getColor(control));
 		}
@@ -2257,9 +2264,11 @@ namespace LLInitParam
 		// in this case, that is left+width and bottom+height
 		LLRect& value = getValue();
 
+		right.set(value.mRight, false);
 		left.set(value.mLeft, make_block_authoritative);
 		width.set(value.getWidth(), make_block_authoritative);
 
+		top.set(value.mTop, false);
 		bottom.set(value.mBottom, make_block_authoritative);
 		height.set(value.getHeight(), make_block_authoritative);
 	}
diff --git a/indra/llui/llui.h b/indra/llui/llui.h
index 7801a01ace..28e84fa444 100644
--- a/indra/llui/llui.h
+++ b/indra/llui/llui.h
@@ -41,6 +41,7 @@
 #include <boost/signals2.hpp>
 #include "lllazyvalue.h"
 #include "llframetimer.h"
+#include <limits>
 
 // LLUIFactory
 #include "llsd.h"
@@ -148,6 +149,122 @@ class LLUI
 	LOG_CLASS(LLUI);
 public:
 	//
+	// Classes
+	//
+
+	struct RangeS32 
+	{
+		struct Params : public LLInitParam::Block<Params>
+		{
+			Optional<S32>	minimum,
+							maximum;
+
+			Params()
+			:	minimum("min", 0),
+				maximum("max", S32_MAX)
+			{}
+		};
+
+		// correct for inverted params
+		RangeS32(const Params& p = Params())
+		:	mMin(p.minimum),
+			mMax(p.maximum)
+		{
+			sanitizeRange();
+		}
+
+		RangeS32(S32 minimum, S32 maximum)
+		:	mMin(minimum),
+			mMax(maximum)
+		{
+			sanitizeRange();
+		}
+
+		S32 clamp(S32 input)
+		{
+			if (input < mMin) return mMin;
+			if (input > mMax) return mMax;
+			return input;
+		}
+
+		void setRange(S32 minimum, S32 maximum)
+		{
+			mMin = minimum;
+			mMax = maximum;
+			sanitizeRange();
+		}
+
+		S32 getMin() { return mMin; }
+		S32 getMax() { return mMax; }
+
+		bool operator==(const RangeS32& other) const
+		{
+			return mMin == other.mMin 
+				&& mMax == other.mMax;
+		}
+	private:
+		void sanitizeRange()
+		{
+			if (mMin > mMax)
+			{
+				llwarns << "Bad interval range (" << mMin << ", " << mMax << ")" << llendl;
+				// since max is usually the most dangerous one to ignore (buffer overflow, etc), prefer it
+				// in the case of a malformed range
+				mMin = mMax;
+			}
+		}
+
+
+		S32	mMin,
+			mMax;
+	};
+
+	struct ClampedS32 : public RangeS32
+	{
+		struct Params : public LLInitParam::Block<Params, RangeS32::Params>
+		{
+			Mandatory<S32> value;
+
+			Params()
+			:	value("", 0)
+			{
+				addSynonym(value, "value");
+			}
+		};
+
+		ClampedS32(const Params& p)
+		:	RangeS32(p)
+		{}
+
+		ClampedS32(const RangeS32& range)
+		:	RangeS32(range)
+		{
+			// set value here, after range has been sanitized
+			mValue = clamp(0);
+		}
+
+		ClampedS32(S32 value, const RangeS32& range = RangeS32())
+		:	RangeS32(range)
+		{
+			mValue = clamp(value);
+		}
+
+		S32 get()
+		{
+			return mValue;
+		}
+
+		void set(S32 value)
+		{
+			mValue = clamp(value);
+		}
+
+
+	private:
+		S32 mValue;
+	};
+
+	//
 	// Methods
 	//
 	typedef std::map<std::string, LLControlGroup*> settings_map_t;
@@ -365,7 +482,7 @@ template <typename T> LLRegisterWith<LLInitClassList> LLInitClass<T>::sRegister(
 template <typename T> LLRegisterWith<LLDestroyClassList> LLDestroyClass<T>::sRegister(&T::destroyClass);
 
 // useful parameter blocks
-struct TimeIntervalParam : public LLInitParam::Choice<TimeIntervalParam>
+struct TimeIntervalParam : public LLInitParam::ChoiceBlock<TimeIntervalParam>
 {
 	Alternative<F32>		seconds;
 	Alternative<S32>		frames;
diff --git a/indra/llui/lluicolortable.h b/indra/llui/lluicolortable.h
index 76518789ec..6a7a681d57 100644
--- a/indra/llui/lluicolortable.h
+++ b/indra/llui/lluicolortable.h
@@ -44,7 +44,7 @@ LOG_CLASS(LLUIColorTable);
 	typedef std::map<std::string, LLUIColor>  string_color_map_t;
 
 public:
-	struct ColorParams : LLInitParam::Choice<ColorParams>
+	struct ColorParams : LLInitParam::ChoiceBlock<ColorParams>
 	{
 		Alternative<LLColor4>    value;
 		Alternative<std::string> reference;
diff --git a/indra/llui/lluictrl.cpp b/indra/llui/lluictrl.cpp
index 9b9e2ddb55..2fa260ded1 100644
--- a/indra/llui/lluictrl.cpp
+++ b/indra/llui/lluictrl.cpp
@@ -992,6 +992,16 @@ void LLUICtrl::setTransparencyType(ETypeTransparency type)
 	mTransparencyType = type;
 }
 
+boost::signals2::connection LLUICtrl::setCommitCallback(const CommitCallbackParam& cb)
+{
+	return setCommitCallback(initCommitCallback(cb));
+}
+
+boost::signals2::connection LLUICtrl::setValidateCallback(const EnableCallbackParam& cb)
+{
+	return setValidateCallback(initEnableCallback(cb));
+}
+
 boost::signals2::connection LLUICtrl::setCommitCallback( const commit_signal_t::slot_type& cb ) 
 { 
 	if (!mCommitSignal) mCommitSignal = new commit_signal_t();
diff --git a/indra/llui/lluictrl.h b/indra/llui/lluictrl.h
index 8a8b589e9c..3e055a9d06 100644
--- a/indra/llui/lluictrl.h
+++ b/indra/llui/lluictrl.h
@@ -76,14 +76,14 @@ public:
 		Optional<enable_callback_t> function;
 	};
 		
-	struct EnableControls : public LLInitParam::Choice<EnableControls>
+	struct EnableControls : public LLInitParam::ChoiceBlock<EnableControls>
 	{
 		Alternative<std::string> enabled;
 		Alternative<std::string> disabled;
 		
 		EnableControls();
 	};	
-	struct ControlVisibility : public LLInitParam::Choice<ControlVisibility>
+	struct ControlVisibility : public LLInitParam::ChoiceBlock<ControlVisibility>
 	{
 		Alternative<std::string> visible;
 		Alternative<std::string> invisible;
@@ -235,6 +235,9 @@ public:
 	// topic then put in help_topic_out
 	bool                    findHelpTopic(std::string& help_topic_out);
 
+	boost::signals2::connection setCommitCallback(const CommitCallbackParam& cb);
+	boost::signals2::connection setValidateCallback(const EnableCallbackParam& cb);
+
 	boost::signals2::connection setCommitCallback( const commit_signal_t::slot_type& cb );
 	boost::signals2::connection setValidateCallback( const enable_signal_t::slot_type& cb );
 
diff --git a/indra/llui/lluictrlfactory.h b/indra/llui/lluictrlfactory.h
index d345ad4cd0..d612ad5005 100644
--- a/indra/llui/lluictrlfactory.h
+++ b/indra/llui/lluictrlfactory.h
@@ -125,12 +125,12 @@ private:
 
 	// base case for recursion, there are NO base classes of LLInitParam::BaseBlock
 	template<int DUMMY>
-	class ParamDefaults<LLInitParam::BaseBlockWithFlags, DUMMY> : public LLSingleton<ParamDefaults<LLInitParam::BaseBlockWithFlags, DUMMY> >
+	class ParamDefaults<LLInitParam::BaseBlock, DUMMY> : public LLSingleton<ParamDefaults<LLInitParam::BaseBlock, DUMMY> >
 	{
 	public:
-		const LLInitParam::BaseBlockWithFlags& get() { return mBaseBlock; }
+		const LLInitParam::BaseBlock& get() { return mBaseBlock; }
 	private:
-		LLInitParam::BaseBlockWithFlags mBaseBlock;
+		LLInitParam::BaseBlock mBaseBlock;
 	};
 
 public:
@@ -172,7 +172,7 @@ public:
 	static T* createFromFile(const std::string &filename, LLView *parent, const widget_registry_t& registry, LLXMLNodePtr output_node = NULL)
 	{
 		T* widget = NULL;
-
+		
 		std::string skinned_filename = findSkinnedFilename(filename);
 		instance().pushFileName(filename);
 		{
@@ -201,10 +201,10 @@ public:
 				// not of right type, so delete it
 				if (!widget) 
 				{
+					llwarns << "Widget in " << filename << " was of type " << typeid(view).name() << " instead of expected type " << typeid(T).name() << llendl;
 					delete view;
 					view = NULL;
 				}
-			
 			}
 		}
 fail:
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index 3ddfb090c8..fdb84f1ec5 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -862,15 +862,16 @@ BOOL LLView::handleToolTip(S32 x, S32 y, MASK mask)
 
 	// parents provide tooltips first, which are optionally
 	// overridden by children, in case child is mouse_opaque
-	if (!mToolTipMsg.empty())
+	std::string tooltip = getToolTip();
+	if (!tooltip.empty())
 	{
 		// allow "scrubbing" over ui by showing next tooltip immediately
 		// if previous one was still visible
 		F32 timeout = LLToolTipMgr::instance().toolTipVisible() 
-			? 0.f
+			? LLUI::sSettingGroups["config"]->getF32( "ToolTipFastDelay" )
 			: LLUI::sSettingGroups["config"]->getF32( "ToolTipDelay" );
 		LLToolTipMgr::instance().show(LLToolTip::Params()
-			.message(mToolTipMsg)
+			.message(tooltip)
 			.sticky_rect(calcScreenRect())
 			.delay_time(timeout));
 
@@ -1601,13 +1602,6 @@ LLView* LLView::findNextSibling(LLView* child)
 	return (next_it != mChildList.end()) ? *next_it : NULL;
 }
 
-void LLView::deleteViewByHandle(LLHandle<LLView> handle)
-{
-	LLView* viewp = handle.get();
-
-	delete viewp;
-}
-
 
 LLCoordGL getNeededTranslation(const LLRect& input, const LLRect& constraint, BOOL allow_partial_outside)
 {
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index fe15307a5d..6d1dda90af 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -97,13 +97,10 @@ private:
 	static std::vector<LLViewDrawContext*> sDrawContextStack;
 };
 
-class LLViewWidgetRegistry : public LLChildRegistry<LLViewWidgetRegistry>
-{};
-
 class LLView : public LLMouseHandler, public LLMortician, public LLFocusableElement
 {
 public:
-	struct Follows : public LLInitParam::Choice<Follows>
+	struct Follows : public LLInitParam::ChoiceBlock<Follows>
 	{
 		Alternative<std::string>	string;
 		Alternative<U32>			flags;
@@ -152,7 +149,8 @@ public:
 		Params();
 	};
 
-	typedef LLViewWidgetRegistry child_registry_t;
+	// most widgets are valid children of LLView
+	typedef LLDefaultChildRegistry child_registry_t;
 
 	void initFromParams(const LLView::Params&);
 
@@ -242,7 +240,7 @@ public:
 
 	ECursorType	getHoverCursor() { return mHoverCursor; }
 
-	const std::string& getToolTip() const			{ return mToolTipMsg.getString(); }
+	virtual const std::string getToolTip() const			{ return mToolTipMsg.getString(); }
 
 	void		sendChildToFront(LLView* child);
 	void		sendChildToBack(LLView* child);
@@ -472,6 +470,20 @@ public:
 		return dynamic_cast<T*>(widgetp);
 	}
 
+	template <class T> T* getParentByType() const
+	{
+		LLView* parent = getParent();
+		while(parent)
+		{
+			if (dynamic_cast<T*>(parent))
+			{
+				return static_cast<T*>(parent);
+			}
+			parent = parent->getParent();
+		}
+		return NULL;
+	}
+
 	//////////////////////////////////////////////
 	// statics
 	//////////////////////////////////////////////
@@ -487,7 +499,6 @@ public:
 	// return query for iterating over focus roots in tab order
 	static const LLCtrlQuery & getFocusRootsQuery();
 
-	static void deleteViewByHandle(LLHandle<LLView> handle);
 	static LLWindow*	getWindow(void) { return LLUI::sWindow; }
 
 	// Set up params after XML load before calling new(),
diff --git a/indra/llui/tests/llurlentry_stub.cpp b/indra/llui/tests/llurlentry_stub.cpp
index d522123260..4f251db93b 100644
--- a/indra/llui/tests/llurlentry_stub.cpp
+++ b/indra/llui/tests/llurlentry_stub.cpp
@@ -124,8 +124,8 @@ namespace LLInitParam
 	{
 		descriptor.mCurrentBlockPtr = this;
 	}
-	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, S32 generation){ return true; }
-	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t name_stack, const LLInitParam::BaseBlock* diff_block) const {}
+	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name){ return true; }
+	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t& name_stack, const LLInitParam::BaseBlock* diff_block) const {}
 	bool BaseBlock::inspectBlock(Parser& parser, Parser::name_stack_t name_stack, S32 min_value, S32 max_value) const { return true; }
 	bool BaseBlock::mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { return true; }
 	bool BaseBlock::validateBlock(bool emit_errors) const { return true; }
diff --git a/indra/llui/tests/llurlentry_test.cpp b/indra/llui/tests/llurlentry_test.cpp
index 2f814f4200..c1fb050206 100644
--- a/indra/llui/tests/llurlentry_test.cpp
+++ b/indra/llui/tests/llurlentry_test.cpp
@@ -72,7 +72,6 @@ S32 LLUIImage::getHeight() const
 
 namespace LLInitParam
 {
-	S32 Parser::sNextParseGeneration = 0;
 	BlockDescriptor::BlockDescriptor() {}
 	ParamDescriptor::ParamDescriptor(param_handle_t p, 
 						merge_func_t merge_func, 
diff --git a/indra/llui/tests/llurlmatch_test.cpp b/indra/llui/tests/llurlmatch_test.cpp
index fb6a2eabf1..627f3129e9 100644
--- a/indra/llui/tests/llurlmatch_test.cpp
+++ b/indra/llui/tests/llurlmatch_test.cpp
@@ -66,8 +66,6 @@ namespace LLInitParam
 	BaseBlock::BaseBlock() {}
 	BaseBlock::~BaseBlock() {}
 
-	S32 Parser::sNextParseGeneration = 0;
-
 	BlockDescriptor::BlockDescriptor() {}
 	ParamDescriptor::ParamDescriptor(param_handle_t p, 
 						merge_func_t merge_func, 
@@ -98,8 +96,8 @@ namespace LLInitParam
 		mEnclosingBlockOffset = 0x7FFFffff & ((U32)(my_addr - block_addr));
 	}
 
-	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, S32 generation){ return true; }
-	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t name_stack, const LLInitParam::BaseBlock* diff_block) const {}
+	bool BaseBlock::deserializeBlock(Parser& p, Parser::name_stack_range_t name_stack, bool new_name){ return true; }
+	void BaseBlock::serializeBlock(Parser& parser, Parser::name_stack_t& name_stack, const LLInitParam::BaseBlock* diff_block) const {}
 	bool BaseBlock::inspectBlock(Parser& parser, Parser::name_stack_t name_stack, S32 min_count, S32 max_count) const { return true; }
 	bool BaseBlock::mergeBlock(BlockDescriptor& block_data, const BaseBlock& other, bool overwrite) { return true; }
 	bool BaseBlock::validateBlock(bool emit_errors) const { return true; }