EXP-1758 WIP Progress spinner not shown during merketplace synch if Merchant Outbox floater was previously minimized

rewrote layout_stack resizing logic to be symmetrical

49 files changed, 755 insertions, 588 deletions

diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 0e7060e22c..b67030dc34 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -34,10 +34,13 @@
 #include "llpanel.h"
 #include "llresizebar.h"
 #include "llcriticaldamp.h"
+#include "boost/foreach.hpp"
 
 static LLDefaultChildRegistry::Register<LLLayoutStack> register_layout_stack("layout_stack");
 static LLLayoutStack::LayoutStackRegistry::Register<LLLayoutPanel> register_layout_panel("layout_panel");
 
+static const F32 MAX_FRACTIONAL_VALUE = 0.99999f;
+
 void LLLayoutStack::OrientationNames::declareValues()
 {
 	declare("horizontal", HORIZONTAL);
@@ -49,15 +52,12 @@ void LLLayoutStack::OrientationNames::declareValues()
 //
 LLLayoutPanel::Params::Params()	
 :	expanded_min_dim("expanded_min_dim", 0),
-	min_dim("min_dim", 0),
-	max_dim("max_dim", S32_MAX),
-	user_resize("user_resize", true),
+	min_dim("min_dim", -1),
+	user_resize("user_resize", false),
 	auto_resize("auto_resize", true)
 {
 	addSynonym(min_dim, "min_width");
 	addSynonym(min_dim, "min_height");
-	addSynonym(max_dim, "max_width");
-	addSynonym(max_dim, "max_height");
 }
 
 LLLayoutPanel::LLLayoutPanel(const Params& p)	
@@ -65,7 +65,6 @@ LLLayoutPanel::LLLayoutPanel(const Params& p)
 	mExpandedMinDimSpecified(false),
 	mExpandedMinDim(p.min_dim),
  	mMinDim(p.min_dim), 
- 	mMaxDim(p.max_dim), 
  	mAutoResize(p.auto_resize),
  	mUserResize(p.user_resize),
 	mCollapsed(FALSE),
@@ -73,6 +72,8 @@ LLLayoutPanel::LLLayoutPanel(const Params& p)
 	mVisibleAmt(1.f), // default to fully visible
 	mResizeBar(NULL),
 	mFractionalSize(0.f),
+	mTargetDim(0),
+	mIgnoreReshape(false),
 	mOrientation(LLLayoutStack::HORIZONTAL)
 {
 	// Set the expanded min dim if it is provided, otherwise it gets the p.min_dim value
@@ -103,33 +104,85 @@ LLLayoutPanel::~LLLayoutPanel()
 	mResizeBar = NULL;
 }
 
-void LLLayoutPanel::reshape(S32 width, S32 height, BOOL called_from_parent)
+F32 LLLayoutPanel::getAutoResizeFactor() const
+{
+	return mVisibleAmt * (1.f - mCollapseAmt);
+}
+ 
+F32 LLLayoutPanel::getVisibleAmount() const
+{
+	return mVisibleAmt;
+}
+
+S32 LLLayoutPanel::getLayoutDim() const
+{
+	return llround((mOrientation == LLLayoutStack::HORIZONTAL)
+					? getRect().getWidth()
+					: getRect().getHeight());
+}
+ 
+S32 LLLayoutPanel::getVisibleDim() const
+{
+	F32 min_dim = getRelevantMinDim();
+	return llround(mVisibleAmt
+					* (min_dim
+						+ (((F32)mTargetDim - min_dim) * (1.f - mCollapseAmt))));
+}
+ 
+void LLLayoutPanel::setOrientation( LLLayoutStack::ELayoutOrientation orientation )
 {
-	if (mOrientation == LLLayoutStack::HORIZONTAL)
+	mOrientation = orientation;
+	S32 layout_dim = llround((mOrientation == LLLayoutStack::HORIZONTAL)
+		? getRect().getWidth()
+		: getRect().getHeight());
+
+	if (mMinDim == -1)
 	{
-		mFractionalSize += width - llround(mFractionalSize);
+		if (!mAutoResize)
+		{
+			setMinDim(layout_dim);
+		}
+		else
+		{
+			setMinDim(0);
+		}
 	}
-	else
+
+	mTargetDim = llmax(layout_dim, getMinDim());
+}
+ 
+void LLLayoutPanel::setVisible( BOOL visible )
+{
+	if (visible != getVisible())
 	{
-		mFractionalSize += height - llround(mFractionalSize);
+		LLLayoutStack* stackp = dynamic_cast<LLLayoutStack*>(getParent());
+		stackp->mNeedsLayout = true;
 	}
-	LLPanel::reshape(width, height, called_from_parent);
+	LLPanel::setVisible(visible);
 }
 
-F32 LLLayoutPanel::getCollapseFactor()
+void LLLayoutPanel::reshape( S32 width, S32 height, BOOL called_from_parent /*= TRUE*/ )
 {
-	if (mOrientation == LLLayoutStack::HORIZONTAL)
+	if (!mIgnoreReshape && !mAutoResize)
 	{
-		F32 collapse_amt = 
-			clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, (F32)getRelevantMinDim() / (F32)llmax(1, getRect().getWidth()));
-		return mVisibleAmt * collapse_amt;
+		mTargetDim = (mOrientation == LLLayoutStack::HORIZONTAL) ? width : height;
 	}
-	else
+	LLPanel::reshape(width, height, called_from_parent);
+}
+
+void LLLayoutPanel::handleReshape(const LLRect& new_rect, bool by_user)
+{
+	LLLayoutStack* stackp = dynamic_cast<LLLayoutStack*>(getParent());
+	if (stackp)
 	{
-		F32 collapse_amt = 
-			clamp_rescale(mCollapseAmt, 0.f, 1.f, 1.f, llmin(1.f, (F32)getRelevantMinDim() / (F32)llmax(1, getRect().getHeight())));
-		return mVisibleAmt * collapse_amt;
+		stackp->mNeedsLayout = true;
+		if (by_user)
+		{
+			// tell layout stack to account for new shape
+			stackp->updatePanelRect(this, new_rect);
+		}
 	}
+	LLPanel::handleReshape(new_rect, by_user);
 }
 
 //
@@ -147,12 +200,11 @@ LLLayoutStack::Params::Params()
 
 LLLayoutStack::LLLayoutStack(const LLLayoutStack::Params& p) 
 :	LLView(p),
-	mMinWidth(0),
-	mMinHeight(0),
 	mPanelSpacing(p.border_size),
 	mOrientation(p.orientation),
 	mAnimate(p.animate),
 	mAnimatedThisFrame(false),
+	mNeedsLayout(true),
 	mClip(p.clip),
 	mOpenTimeConstant(p.open_time_constant),
 	mCloseTimeConstant(p.close_time_constant)
@@ -169,26 +221,26 @@ void LLLayoutStack::draw()
 {
 	updateLayout();
 
-	e_panel_list_t::iterator panel_it;
-	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	// always clip to stack itself
+	LLLocalClipRect clip(getLocalRect());
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
 	{
 		// clip to layout rectangle, not bounding rectangle
-		LLRect clip_rect = (*panel_it)->getRect();
+		LLRect clip_rect = panelp->getRect();
 		// scale clipping rectangle by visible amount
 		if (mOrientation == HORIZONTAL)
 		{
-			clip_rect.mRight = clip_rect.mLeft + llround((F32)clip_rect.getWidth() * (*panel_it)->getCollapseFactor());
+			clip_rect.mRight = clip_rect.mLeft + panelp->getVisibleDim();
 		}
 		else
 		{
-			clip_rect.mBottom = clip_rect.mTop - llround((F32)clip_rect.getHeight() * (*panel_it)->getCollapseFactor());
+			clip_rect.mBottom = clip_rect.mTop - panelp->getVisibleDim();
 		}
 
-		LLPanel* panelp = (*panel_it);
-
-		LLLocalClipRect clip(clip_rect, mClip);
-		// only force drawing invisible children if visible amount is non-zero
-		drawChild(panelp, 0, 0, !clip_rect.isEmpty());
+		{LLLocalClipRect clip(clip_rect, mClip);
+			// only force drawing invisible children if visible amount is non-zero
+			drawChild(panelp, 0, 0, !clip_rect.isEmpty());
+		}
 	}
 	mAnimatedThisFrame = false;
 }
@@ -201,12 +253,10 @@ void LLLayoutStack::removeChild(LLView* view)
 	{
 		mPanels.erase(std::find(mPanels.begin(), mPanels.end(), embedded_panelp));
 		delete embedded_panelp;
+		updateFractionalSizes();
+		mNeedsLayout = true;
 	}
 
-	// need to update resizebars
-
-	calcMinExtents();
-
 	LLView::removeChild(view);
 }
 
@@ -221,29 +271,15 @@ 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);
+		createResizeBar(panelp);
+		mNeedsLayout = true;
 	}
-	return LLView::addChild(child, tab_group);
-}
-
-void LLLayoutStack::movePanel(LLPanel* panel_to_move, LLPanel* target_panel, bool move_to_front)
-{
-	LLLayoutPanel* embedded_panel_to_move = findEmbeddedPanel(panel_to_move);
-	LLLayoutPanel* embedded_target_panel = move_to_front ? *mPanels.begin() : findEmbeddedPanel(target_panel);
+	BOOL result = LLView::addChild(child, tab_group);
 
-	if (!embedded_panel_to_move || !embedded_target_panel || embedded_panel_to_move == embedded_target_panel)
-	{
-		llwarns << "One of the panels was not found in stack or NULL was passed instead of valid panel" << llendl;
-		return;
-	}
-	e_panel_list_t::iterator it = std::find(mPanels.begin(), mPanels.end(), embedded_panel_to_move);
-	mPanels.erase(it);
-	it = move_to_front ? mPanels.begin() : std::find(mPanels.begin(), mPanels.end(), embedded_target_panel);
-	mPanels.insert(it, embedded_panel_to_move);
+	updateFractionalSizes();
+	return result;
 }
 
 void LLLayoutStack::addPanel(LLLayoutPanel* panel, EAnimate animate)
@@ -258,23 +294,19 @@ void LLLayoutStack::addPanel(LLLayoutPanel* panel, EAnimate animate)
 	}
 }
 
-void LLLayoutStack::removePanel(LLPanel* panel)
-{
-	removeChild(panel);
-}
-
 void LLLayoutStack::collapsePanel(LLPanel* panel, BOOL collapsed)
 {
 	LLLayoutPanel* panel_container = findEmbeddedPanel(panel);
 	if (!panel_container) return;
 
 	panel_container->mCollapsed = collapsed;
+	mNeedsLayout = true;
 }
 
 void LLLayoutStack::updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize)
 {
 	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
-
+	
 	if (panel)
 	{
 		panel->mAutoResize = auto_resize;
@@ -291,51 +323,246 @@ void LLLayoutStack::setPanelUserResize(const std::string& panel_name, BOOL user_
 	}
 }
 
-bool LLLayoutStack::getPanelMinSize(const std::string& panel_name, S32* min_dimp)
+
+static LLFastTimer::DeclareTimer FTM_UPDATE_LAYOUT("Update LayoutStacks");
+
+void LLLayoutStack::updateLayout()
+{	
+	LLFastTimer ft(FTM_UPDATE_LAYOUT);
+
+	if (!mNeedsLayout) return;
+
+	bool animation_in_progress = animatePanels();
+	F32 total_visible_fraction = 0.f;
+	S32 space_to_distribute = (mOrientation == HORIZONTAL)
+							? getRect().getWidth()
+							: getRect().getHeight();
+
+	// first, assign minimum dimensions
+	LLLayoutPanel* panelp = NULL;
+	BOOST_FOREACH(panelp, mPanels)
+	{
+		if (panelp->mAutoResize)
+		{
+			panelp->mTargetDim = panelp->getRelevantMinDim();
+		}
+		space_to_distribute -= panelp->getVisibleDim() + llround((F32)mPanelSpacing * panelp->getVisibleAmount());
+		total_visible_fraction += panelp->mFractionalSize * panelp->getAutoResizeFactor();
+	}
+
+	llassert(total_visible_fraction < 1.01f);
+
+	// don't need spacing after last panel
+	space_to_distribute += panelp ? llround((F32)mPanelSpacing * panelp->getVisibleAmount()) : 0;
+
+	// scale up space to distribute, since some of might will go to an invisible fraction of the auto-resize space
+	space_to_distribute = (total_visible_fraction > 0.f)
+						? llround((F32)space_to_distribute / total_visible_fraction)
+						: space_to_distribute;
+
+	if (space_to_distribute > 0)
+	{	// give space proportionally to auto resize panels, even invisible ones
+		BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+		{
+			if (panelp->mAutoResize == TRUE)
+			{
+				S32 delta = llround((F32)space_to_distribute * panelp->mFractionalSize/* * panelp->getAutoResizeFactor()*/);
+				panelp->mTargetDim += delta;
+			}
+		}
+	}
+
+	F32 cur_pos = (mOrientation == HORIZONTAL) ? 0.f : (F32)getRect().getHeight();
+
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		F32 panel_dim = panelp->mTargetDim;
+		F32 panel_visible_dim = panelp->getVisibleDim();
+
+		LLRect panel_rect;
+		if (mOrientation == HORIZONTAL)
+		{
+			panel_rect.setLeftTopAndSize(llround(cur_pos),
+										getRect().getHeight(),
+										llround(panel_dim),
+										getRect().getHeight());
+		}
+		else
+		{
+			panel_rect.setLeftTopAndSize(0,
+				llround(cur_pos),
+				getRect().getWidth(),
+				llround(panel_dim));
+		}
+		panelp->setIgnoreReshape(true);
+		panelp->setShape(panel_rect);
+		panelp->setIgnoreReshape(false);
+
+		static LLUICachedControl<S32> resize_bar_overlap ("UIResizeBarOverlap", 0);
+		LLRect resize_bar_rect(panel_rect);
+
+		F32 panel_spacing = (F32)mPanelSpacing * panelp->getVisibleAmount();
+		if (mOrientation == HORIZONTAL)
+		{
+			resize_bar_rect.mLeft = panel_rect.mRight - resize_bar_overlap;
+			resize_bar_rect.mRight = panel_rect.mRight + panel_spacing + resize_bar_overlap;
+
+			cur_pos += panel_visible_dim + panel_spacing;
+		}
+		else //VERTICAL
+		{
+			resize_bar_rect.mTop = panel_rect.mBottom + resize_bar_overlap;
+			resize_bar_rect.mBottom = panel_rect.mBottom - panel_spacing - resize_bar_overlap;
+
+			cur_pos -= panel_visible_dim + panel_spacing;
+		}
+		panelp->mResizeBar->setShape(resize_bar_rect);
+	}
+
+	updateResizeBarLimits();
+
+	// clear animation flag at end, since panel resizes will set it
+	// and leave it set if there is any animation in progress
+	mNeedsLayout = animation_in_progress;
+} // end LLLayoutStack::updateLayout
+
+LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
+{
+	if (!panelp) return NULL;
+
+	e_panel_list_t::const_iterator panel_it;
+	BOOST_FOREACH(LLLayoutPanel* p, mPanels)
+	{
+		if (p == panelp)
+		{
+			return p;
+		}
+	}
+	return NULL;
+}
+
+LLLayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
 {
-	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	LLLayoutPanel* result = NULL;
 
-	if (panel && min_dimp)
+	BOOST_FOREACH(LLLayoutPanel* p, mPanels)
 	{
-		*min_dimp = panel->getRelevantMinDim();
+		if (p->getName() == name)
+		{
+			result = p;
+			break;
+		}
 	}
 
-	return NULL != panel;
+	return result;
 }
 
-bool LLLayoutStack::getPanelMaxSize(const std::string& panel_name, S32* max_dimp)
+void LLLayoutStack::createResizeBar(LLLayoutPanel* panelp)
 {
-	LLLayoutPanel* panel = findEmbeddedPanelByName(panel_name);
+	BOOST_FOREACH(LLLayoutPanel* lp, mPanels)
+	{
+		if (lp->mResizeBar == NULL)
+		{
+			LLResizeBar::Side side = (mOrientation == HORIZONTAL) ? LLResizeBar::RIGHT : LLResizeBar::BOTTOM;
+			LLRect resize_bar_rect = getRect();
 
-	if (panel)
+			LLResizeBar::Params resize_params;
+			resize_params.name("resize");
+			resize_params.resizing_view(lp);
+			resize_params.min_size(lp->getRelevantMinDim());
+			resize_params.side(side);
+			resize_params.snapping_enabled(false);
+			LLResizeBar* resize_bar = LLUICtrlFactory::create<LLResizeBar>(resize_params);
+			lp->mResizeBar = resize_bar;
+			LLView::addChild(resize_bar, 0);
+		}
+	}
+	// bring all resize bars to the front so that they are clickable even over the panels
+	// with a bit of overlap
+	for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
 	{
-		if (max_dimp) *max_dimp = panel->mMaxDim;
+		LLResizeBar* resize_barp = (*panel_it)->mResizeBar;
+		sendChildToFront(resize_barp);
 	}
+}
 
-	return NULL != panel;
+// update layout stack animations, etc. once per frame
+// NOTE: we use this to size world view based on animating UI, *before* we draw the UI
+// we might still need to call updateLayout during UI draw phase, in case UI elements
+// are resizing themselves dynamically
+//static 
+void LLLayoutStack::updateClass()
+{
+	for (instance_iter it = beginInstances(); it != endInstances(); ++it)
+	{
+		it->updateLayout();
+	}
 }
 
-static LLFastTimer::DeclareTimer FTM_UPDATE_LAYOUT("Update LayoutStacks");
-void LLLayoutStack::updateLayout(BOOL force_resize)
+void LLLayoutStack::updateFractionalSizes()
 {
-	LLFastTimer ft(FTM_UPDATE_LAYOUT);
-	static LLUICachedControl<S32> resize_bar_overlap ("UIResizeBarOverlap", 0);
-	calcMinExtents();
-	createResizeBars();
+	F32 total_resizable_dim = 0;
+	S32 num_auto_resize_panels = 0;
+
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		if (panelp->mAutoResize)
+		{
+			total_resizable_dim += llmax(0, panelp->getLayoutDim() - panelp->getRelevantMinDim());
+			num_auto_resize_panels++;
+		}
+	}
 
-	// calculate current extents
-	F32 total_size = 0.f;
+	F32 total_fractional_size = 0.f;
+	
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		if (panelp->mAutoResize)
+		{
+			F32 panel_resizable_dim = llmax(0.f, (F32)(panelp->getLayoutDim() - panelp->getRelevantMinDim()));
+			panelp->mFractionalSize = llmin(MAX_FRACTIONAL_VALUE, (panel_resizable_dim == 0.f)
+																	? (1.f - MAX_FRACTIONAL_VALUE)
+																	: panel_resizable_dim / total_resizable_dim);
+			total_fractional_size += panelp->mFractionalSize;
+			// check for NaNs
+			llassert(panelp->mFractionalSize == panelp->mFractionalSize);
+		}
+	}
 
+	if (total_fractional_size == 0.f)
+	{ // equal distribution
+		BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+		{
+			if (panelp->mAutoResize)
+			{
+				panelp->mFractionalSize = 1.f / (F32)num_auto_resize_panels;
+			}
+		}
+	}
+	else
+	{ // renormalize
+		BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
+		{
+			if (panelp->mAutoResize)
+			{
+				panelp->mFractionalSize /= total_fractional_size;
+			}
+		}
+	}
+}
+
+bool LLLayoutStack::animatePanels()
+{
+	bool animation_in_progress = false;
+	
 	//
 	// animate visibility
 	//
-	e_panel_list_t::iterator panel_it;
-	for (panel_it = mPanels.begin(); panel_it != mPanels.end();	++panel_it)
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
 	{
-		LLLayoutPanel* panelp = (*panel_it);
-		if (panelp->getVisible()) 
+		if (panelp->getVisible())
 		{
-			if (mAnimate)
+			if (mAnimate && panelp->mVisibleAmt < 1.f)
 			{
 				if (!mAnimatedThisFrame)
 				{
@@ -345,15 +572,21 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 						panelp->mVisibleAmt = 1.f;
 					}
 				}
+				
+				animation_in_progress = true;
 			}
 			else
 			{
-				panelp->mVisibleAmt = 1.f;
+				if (panelp->mVisibleAmt != 1.f)
+				{
+					panelp->mVisibleAmt = 1.f;
+					animation_in_progress = true;
+				}
 			}
 		}
 		else // not visible
 		{
-			if (mAnimate)
+			if (mAnimate && panelp->mVisibleAmt > 0.f)
 			{
 				if (!mAnimatedThisFrame)
 				{
@@ -363,297 +596,206 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 						panelp->mVisibleAmt = 0.f;
 					}
 				}
+
+				animation_in_progress = true;
 			}
 			else
 			{
-				panelp->mVisibleAmt = 0.f;
+				if (panelp->mVisibleAmt != 0.f)
+				{
+					panelp->mVisibleAmt = 0.f;
+					animation_in_progress = true;
+				}
 			}
 		}
 
 		F32 collapse_state = panelp->mCollapsed ? 1.f : 0.f;
-		panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, collapse_state, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
-
-        total_size += panelp->mFractionalSize * panelp->getCollapseFactor();
-        // want n-1 panel gaps for n panels
-		if (panel_it != mPanels.begin())
-		{
-			total_size += mPanelSpacing;
-		}
-	}
-
-	S32 num_resizable_panels = 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 (panelp->getCollapseFactor() < 1.f) 
-		{
-			continue;
-		}
-
-		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 (panelp->mResizeBar->hasMouseCapture() 
-			|| (!panelp->mAutoResize 
-				&& !force_resize))
-		{
-			shrink_headroom_total += cur_size - min_size;
-		}
-		else
-		{
-			num_resizable_panels++;
-			
-			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
-	F32 pixels_to_distribute = (mOrientation == HORIZONTAL)
-							? getRect().getWidth() - total_size
-							: getRect().getHeight() - total_size;
-
-	// now we distribute the pixels...
-	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);
-
-		F32 min_size = panelp->getRelevantMinDim();
-		F32 delta_size = 0.f;
-
-		// if panel can automatically resize (not animating, and resize flag set)...
-		if (panelp->getCollapseFactor() == 1.f 
-			&& (force_resize || panelp->mAutoResize) 
-			&& !panelp->mResizeBar->hasMouseCapture()) 
+		if (panelp->mCollapseAmt != collapse_state)
 		{
-			if (pixels_to_distribute < 0.f)
+			if (!mAnimatedThisFrame)
 			{
-				// 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);
+				panelp->mCollapseAmt = lerp(panelp->mCollapseAmt, collapse_state, LLCriticalDamp::getInterpolant(mCloseTimeConstant));
 			}
-			else
+			animation_in_progress = true;
+			
+			if (llabs(panelp->mCollapseAmt - collapse_state) < 0.001f)
 			{
-				// grow all elements equally
-				delta_size = pixels_to_distribute / (F32)num_resizable_panels;
-				num_resizable_panels--;
+				panelp->mCollapseAmt = collapse_state;
 			}
-			
-			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;
+	mAnimatedThisFrame = true;
 
-		LLRect panel_rect;
-		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);
+	return animation_in_progress;
+}
 
-		LLRect resize_bar_rect = panel_rect;
-		if (mOrientation == HORIZONTAL)
-		{
-			resize_bar_rect.mLeft = panel_rect.mRight - resize_bar_overlap;
-			resize_bar_rect.mRight = panel_rect.mRight + mPanelSpacing + resize_bar_overlap;
-		}
-		else
-		{
-			resize_bar_rect.mTop = panel_rect.mBottom + resize_bar_overlap;
-			resize_bar_rect.mBottom = panel_rect.mBottom - mPanelSpacing - resize_bar_overlap;
-		}
-		(*panel_it)->mResizeBar->setRect(resize_bar_rect);
+void LLLayoutStack::updatePanelRect( LLLayoutPanel* resized_panel, const LLRect& new_rect )
+{
+	S32 new_dim = (mOrientation == HORIZONTAL)
+					? new_rect.getWidth()
+					: new_rect.getHeight();
+	S32 delta_dim = new_dim - resized_panel->getVisibleDim();
+	if (delta_dim == 0) return;
 
-		F32 size = ((*panel_it)->mFractionalSize * (*panel_it)->getCollapseFactor()) + (F32)mPanelSpacing;
-		if (mOrientation == HORIZONTAL)
-		{
-			cur_x += size;
-		}
-		else //VERTICAL
-		{
-			cur_y -= size;
-		}
-	}
+	F32 total_visible_fraction = 0.f;
+	F32 delta_auto_resize_headroom = 0.f;
+	F32 total_auto_resize_headroom = 0.f;
 
-	// update resize bars with new limits
-	LLLayoutPanel* last_resizeable_panel = NULL;
-	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
-	{
-		LLLayoutPanel* panelp = (*panel_it);
-		S32 relevant_min = panelp->getRelevantMinDim();
+	LLLayoutPanel* other_resize_panel = NULL;
+	LLLayoutPanel* following_panel = NULL;
 
-		if (mOrientation == HORIZONTAL)
+	BOOST_REVERSE_FOREACH(LLLayoutPanel* panelp, mPanels)
+	{
+		if (panelp->mAutoResize)
 		{
-			(*panel_it)->mResizeBar->setResizeLimits(
-				relevant_min, 
-				relevant_min + llround(shrink_headroom_total));
+			total_auto_resize_headroom += (F32)(panelp->mTargetDim - panelp->getRelevantMinDim());
+			total_visible_fraction += panelp->mFractionalSize * panelp->getAutoResizeFactor();
 		}
-		else //VERTICAL
+
+		if (panelp == resized_panel)
 		{
-			(*panel_it)->mResizeBar->setResizeLimits(
-				relevant_min, 
-				relevant_min + llround(shrink_headroom_total));
+			other_resize_panel = following_panel;
 		}
 
-		// toggle resize bars based on panel visibility, resizability, etc
-		BOOL resize_bar_enabled = panelp->getVisible() && (*panel_it)->mUserResize;
-		(*panel_it)->mResizeBar->setVisible(resize_bar_enabled);
-
-		if ((*panel_it)->mUserResize || (*panel_it)->mAutoResize)
+		if (panelp->getVisible() && !panelp->mCollapsed)
 		{
-			last_resizeable_panel = (*panel_it);
+			following_panel = panelp;
 		}
 	}
 
-	// hide last resize bar as there is nothing past it
-	// resize bars need to be in between two resizable panels
-	if (last_resizeable_panel)
+	if (resized_panel->mAutoResize == FALSE)
 	{
-		last_resizeable_panel->mResizeBar->setVisible(FALSE);
+		delta_auto_resize_headroom += -delta_dim;
 	}
-
-	// not enough room to fit existing contents
-	if (force_resize == FALSE
-		// layout did not complete by reaching target position
-		&& ((mOrientation == VERTICAL && llround(cur_y) != -mPanelSpacing)
-			|| (mOrientation == HORIZONTAL && llround(cur_x) != getRect().getWidth() + mPanelSpacing)))
+	if (other_resize_panel && other_resize_panel->mAutoResize == FALSE)
 	{
-		// do another layout pass with all stacked elements contributing
-		// even those that don't usually resize
-		llassert_always(force_resize == FALSE);
-		updateLayout(TRUE);
+		delta_auto_resize_headroom += delta_dim;
 	}
 
-	 mAnimatedThisFrame = true;
-} // end LLLayoutStack::updateLayout
 
+	//delta_auto_resize_headroom = (total_visible_fraction > 0.f)
+	//								? delta_auto_resize_headroom / total_visible_fraction
+	//								: 0.f;
 
-LLLayoutPanel* LLLayoutStack::findEmbeddedPanel(LLPanel* panelp) const
-{
-	if (!panelp) return NULL;
+	F32 fraction_given_up = 0.f;
+	F32 fraction_remaining = 1.f;
+	F32 updated_auto_resize_headroom = total_auto_resize_headroom + delta_auto_resize_headroom;
 
-	e_panel_list_t::const_iterator panel_it;
-	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	enum
 	{
-		if ((*panel_it) == panelp)
-		{
-			return *panel_it;
-		}
-	}
-	return NULL;
-}
-
-LLLayoutPanel* LLLayoutStack::findEmbeddedPanelByName(const std::string& name) const
-{
-	LLLayoutPanel* result = NULL;
+		BEFORE_RESIZED_PANEL,
+		RESIZED_PANEL,
+		NEXT_PANEL,
+		AFTER_RESIZED_PANEL
+	} which_panel = BEFORE_RESIZED_PANEL;
 
-	for (e_panel_list_t::const_iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	BOOST_FOREACH(LLLayoutPanel* panelp, mPanels)
 	{
-		LLLayoutPanel* p = *panel_it;
+		if (!panelp->getVisible() || panelp->mCollapsed) continue;
 
-		if (p->getName() == name)
+		if (panelp == resized_panel)
 		{
-			result = p;
-			break;
+			which_panel = RESIZED_PANEL;
 		}
-	}
-
-	return result;
-}
 
-// Compute sum of min_width or min_height of children
-void LLLayoutStack::calcMinExtents()
-{
-	mMinWidth = 0;
-	mMinHeight = 0;
-
-	e_panel_list_t::iterator panel_it;
-	for (panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
-	{
-		if (mOrientation == HORIZONTAL)
+		switch(which_panel)
 		{
-            mMinWidth += (*panel_it)->getRelevantMinDim();
-			if (panel_it != mPanels.begin())
+		case BEFORE_RESIZED_PANEL:
+			if (panelp->mAutoResize)
+			{	// freeze current size as fraction of overall auto_resize space
+				F32 fractional_adjustment_factor = total_auto_resize_headroom / updated_auto_resize_headroom;
+				F32 new_fractional_size = llclamp(panelp->mFractionalSize * fractional_adjustment_factor,
+													0.f,
+													MAX_FRACTIONAL_VALUE);
+				F32 fraction_delta = (new_fractional_size - panelp->mFractionalSize);
+				fraction_given_up -= fraction_delta;
+				fraction_remaining -= panelp->mFractionalSize;
+				panelp->mFractionalSize += fraction_delta;
+				llassert(!llisnan(panelp->mFractionalSize));
+			}
+			else
 			{
-				mMinWidth += mPanelSpacing;
+				// leave non auto-resize panels alone
 			}
-		}
-		else //VERTICAL
-		{
-			mMinHeight += (*panel_it)->getRelevantMinDim();
-			if (panel_it != mPanels.begin())
+			break;
+		case RESIZED_PANEL:
+			if (panelp->mAutoResize)
+			{	// freeze new size as fraction
+				F32 new_fractional_size = (updated_auto_resize_headroom == 0.f)
+					? 1.f
+					: llmin(MAX_FRACTIONAL_VALUE, ((F32)(new_dim - panelp->getRelevantMinDim()) / updated_auto_resize_headroom));
+				fraction_given_up -= new_fractional_size - panelp->mFractionalSize;
+				fraction_remaining -= panelp->mFractionalSize;
+				panelp->mFractionalSize = new_fractional_size;
+				llassert(!llisnan(panelp->mFractionalSize));
+			}
+			else
+			{	// freeze new size as original size
+				panelp->mTargetDim = new_dim;
+				fraction_remaining -= fraction_given_up;
+			}
+			which_panel = NEXT_PANEL;
+			break;
+		case NEXT_PANEL:
+			if (panelp->mAutoResize)
+			{
+				F32 new_fractional_size = (F32)(panelp->mTargetDim - panelp->getRelevantMinDim() + delta_auto_resize_headroom) 
+												/ updated_auto_resize_headroom;
+				fraction_given_up -= new_fractional_size - panelp->mFractionalSize;
+				fraction_remaining -= panelp->mFractionalSize;
+				panelp->mFractionalSize = new_fractional_size;
+			}
+			else
+			{
+				panelp->mTargetDim -= delta_dim;
+			}
+			which_panel = AFTER_RESIZED_PANEL;
+			break;
+		case AFTER_RESIZED_PANEL:
+			if (panelp->mAutoResize)
 			{
-				mMinHeight += mPanelSpacing;
+				panelp->mFractionalSize += (panelp->mFractionalSize / fraction_remaining) * fraction_given_up;
 			}
+		default:
+			break;
 		}
 	}
 }
 
-void LLLayoutStack::createResizeBars()
+void LLLayoutStack::reshape(S32 width, S32 height, BOOL called_from_parent)
 {
-	for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
+	mNeedsLayout = true;
+	LLView::reshape(width, height, called_from_parent);
+}
+
+void LLLayoutStack::updateResizeBarLimits()
+{
+	LLLayoutPanel* previous_visible_panelp = NULL;
+	BOOST_REVERSE_FOREACH(LLLayoutPanel* visible_panelp, mPanels)
 	{
-		LLLayoutPanel* lp = (*panel_it);
-		if (lp->mResizeBar == NULL)
+		if (!visible_panelp->getVisible() || visible_panelp->mCollapsed)
 		{
-			LLResizeBar::Side side = (mOrientation == HORIZONTAL) ? LLResizeBar::RIGHT : LLResizeBar::BOTTOM;
-			LLRect resize_bar_rect = getRect();
-
-			LLResizeBar::Params resize_params;
-			resize_params.name("resize");
-			resize_params.resizing_view(lp);
-			resize_params.min_size(lp->getRelevantMinDim());
-			resize_params.side(side);
-			resize_params.snapping_enabled(false);
-			LLResizeBar* resize_bar = LLUICtrlFactory::create<LLResizeBar>(resize_params);
-			lp->mResizeBar = resize_bar;
-			LLView::addChild(resize_bar, 0);
+			visible_panelp->mResizeBar->setVisible(FALSE);
+			continue;
+		}
 
-			// bring all resize bars to the front so that they are clickable even over the panels
-			// with a bit of overlap
-			for (e_panel_list_t::iterator panel_it = mPanels.begin(); panel_it != mPanels.end(); ++panel_it)
-			{
-				LLResizeBar* resize_barp = (*panel_it)->mResizeBar;
-				sendChildToFront(resize_barp);
-			}
+		// toggle resize bars based on panel visibility, resizability, etc
+		if (visible_panelp->mUserResize 
+			&& previous_visible_panelp 
+			&& previous_visible_panelp->mUserResize)
+		{
+			visible_panelp->mResizeBar->setVisible(TRUE);
+			visible_panelp->mResizeBar->setResizeLimits(visible_panelp->getRelevantMinDim(), 
+														visible_panelp->getVisibleDim() 
+															+ (previous_visible_panelp->getVisibleDim() 
+																- previous_visible_panelp->getRelevantMinDim()));
+		}
+		else
+		{
+			visible_panelp->mResizeBar->setVisible(FALSE);
 		}
-	}
-}
 
-// update layout stack animations, etc. once per frame
-// NOTE: we use this to size world view based on animating UI, *before* we draw the UI
-// we might still need to call updateLayout during UI draw phase, in case UI elements
-// are resizing themselves dynamically
-//static 
-void LLLayoutStack::updateClass()
-{
-	for (instance_iter it = beginInstances(); it != endInstances(); ++it)
-	{
-		it->updateLayout();
+		previous_visible_panelp = visible_panelp;
 	}
 }
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index 3b308a359d..a343e11cec 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -5,7 +5,7 @@
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2010, Linden Research, Inc.
+ * Copyright (C) 2010, Linden Reshasearch, Inc.
  * 
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -72,12 +72,11 @@ public:
 	/*virtual*/ void removeChild(LLView*);
 	/*virtual*/ BOOL postBuild();
 	/*virtual*/ bool addChild(LLView* child, S32 tab_group = 0);
+	/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
+
 
 	static LLView* fromXML(LLXMLNodePtr node, LLView *parent, LLXMLNodePtr output_node = NULL);
 
-	S32 getMinWidth() const { return mMinWidth; }
-	S32 getMinHeight() const { return mMinHeight; }
-	
 	typedef enum e_animate
 	{
 		NO_ANIMATE,
@@ -85,47 +84,27 @@ public:
 	} EAnimate;
 
 	void addPanel(LLLayoutPanel* panel, EAnimate animate = NO_ANIMATE);
-	void removePanel(LLPanel* panel);
 	void collapsePanel(LLPanel* panel, BOOL collapsed = TRUE);
 	S32 getNumPanels() { return mPanels.size(); }
-	/**
-	 * Moves panel_to_move before target_panel inside layout stack (both panels should already be there).
-	 * If move_to_front is true target_panel is ignored and panel_to_move is moved to the beginning of mPanels
-	 */
-	void movePanel(LLPanel* panel_to_move, LLPanel* target_panel, bool move_to_front = false);
 
 	void updatePanelAutoResize(const std::string& panel_name, BOOL auto_resize);
 	void setPanelUserResize(const std::string& panel_name, BOOL user_resize);
 	
-	/**
-	 * Gets minimal dimension along layout_stack axis of the specified by name panel.
-	 *
-	 * @returns true if specified by panel_name internal panel exists, false otherwise.
-	 */
-	bool getPanelMinSize(const std::string& panel_name, S32* min_dimp);
-
-	/**
-	 * Gets maximal dimension along layout_stack axis of the specified by name panel.
-	 *
-	 * @returns true if specified by panel_name internal panel exists, false otherwise.
-	 */
-	bool getPanelMaxSize(const std::string& panel_name, S32* max_dim);
-	
-	void updateLayout(BOOL force_resize = FALSE);
-	
+	void updateLayout();
+
 	S32 getPanelSpacing() const { return mPanelSpacing; }
-	BOOL getAnimate () const { return mAnimate; }
-	void setAnimate (BOOL animate) { mAnimate = animate; }
 	
 	static void updateClass();
 
 protected:
 	LLLayoutStack(const Params&);
 	friend class LLUICtrlFactory;
+	friend class LLLayoutPanel;
 
 private:
-	void createResizeBars();
-	void calcMinExtents();
+	void updateResizeBarLimits();
+	bool animatePanels();
+	void createResizeBar(LLLayoutPanel* panel);
 
 	const ELayoutOrientation mOrientation;
 
@@ -134,9 +113,9 @@ private:
 
 	LLLayoutPanel* findEmbeddedPanel(LLPanel* panelp) const;
 	LLLayoutPanel* findEmbeddedPanelByName(const std::string& name) const;
+	void updateFractionalSizes();
+	void updatePanelRect( LLLayoutPanel* param1, const LLRect& new_rect );
 
-	S32 mMinWidth;  // calculated by calcMinExtents
-	S32 mMinHeight;  // calculated by calcMinExtents
 	S32 mPanelSpacing;
 
 	// true if we already applied animation this frame
@@ -145,6 +124,7 @@ private:
 	bool mClip;
 	F32 mOpenTimeConstant;
 	F32 mCloseTimeConstant;
+	bool mNeedsLayout;
 }; // end class LLLayoutStack
 
 
@@ -156,8 +136,7 @@ public:
 	struct Params : public LLInitParam::Block<Params, LLPanel::Params>
 	{
 		Optional<S32>			expanded_min_dim,
-								min_dim,
-								max_dim;
+								min_dim;
 		Optional<bool>			user_resize,
 								auto_resize;
 
@@ -168,14 +147,17 @@ public:
 
 	void initFromParams(const Params& p);
 
+	void handleReshape(const LLRect& new_rect, bool by_user);
+
 	void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
+	
+
+	void setVisible(BOOL visible);
 
+	S32 getLayoutDim() const;
 	S32 getMinDim() const { return mMinDim; }
 	void setMinDim(S32 value) { mMinDim = value; if (!mExpandedMinDimSpecified) mExpandedMinDim = value; }
 
-	S32 getMaxDim() const { return mMaxDim; }
-	void setMaxDim(S32 value) { mMaxDim = value; }
-
 	S32 getExpandedMinDim() const { return mExpandedMinDim; }
 	void setExpandedMinDim(S32 value) { mExpandedMinDim = value; mExpandedMinDimSpecified = true; }
 	
@@ -191,8 +173,14 @@ public:
 		return min_dim;
 	}
 
-	F32 getCollapseFactor();
-	void setOrientation(LLLayoutStack::ELayoutOrientation orientation) { mOrientation = orientation; }
+	F32 getAutoResizeFactor() const;
+	F32 getVisibleAmount() const;
+	S32 getVisibleDim() const;
+
+	void setOrientation(LLLayoutStack::ELayoutOrientation orientation);
+	void storeOriginalDim();
+
+	void setIgnoreReshape(bool ignore) { mIgnoreReshape = ignore; }
 
 protected:
 	LLLayoutPanel(const Params& p);
@@ -201,13 +189,14 @@ protected:
 	S32		mExpandedMinDim;
 	
 	S32		mMinDim;
-	S32		mMaxDim;
 	bool	mAutoResize;
 	bool	mUserResize;
 	bool	mCollapsed;
 	F32		mVisibleAmt;
 	F32		mCollapseAmt;
 	F32		mFractionalSize;
+	S32		mTargetDim;
+	bool	mIgnoreReshape;
 	LLLayoutStack::ELayoutOrientation mOrientation;
 	class LLResizeBar* mResizeBar;
 };
diff --git a/indra/llui/llresizebar.cpp b/indra/llui/llresizebar.cpp
index 02f60c76fa..87aeb4d7a7 100644
--- a/indra/llui/llresizebar.cpp
+++ b/indra/llui/llresizebar.cpp
@@ -79,6 +79,8 @@ LLResizeBar::LLResizeBar(const LLResizeBar::Params& p)
 
 BOOL LLResizeBar::handleMouseDown(S32 x, S32 y, MASK mask)
 {
+	if (!canResize()) return FALSE;
+
 	// Route future Mouse messages here preemptively.  (Release on mouse up.)
 	// No handler needed for focus lost since this clas has no state that depends on it.
 	gFocusMgr.setMouseCapture( this );
@@ -243,7 +245,7 @@ BOOL LLResizeBar::handleHover(S32 x, S32 y, MASK mask)
 		handled = TRUE;
 	}
 
-	if( handled )
+	if( handled && canResize() )
 	{
 		switch( mSide )
 		{
diff --git a/indra/llui/llresizebar.h b/indra/llui/llresizebar.h
index 0725fbd846..6daf191918 100644
--- a/indra/llui/llresizebar.h
+++ b/indra/llui/llresizebar.h
@@ -70,6 +70,7 @@ public:
 	void			setResizeLimits( S32 min_size, S32 max_size ) { mMinSize = min_size; mMaxSize = max_size; }
 	void			setEnableSnapping(BOOL enable) { mSnappingEnabled = enable; }
 	void			setAllowDoubleClickSnapping(BOOL allow) { mAllowDoubleClickSnapping = allow; }
+	bool			canResize() { return getEnabled() && mMaxSize > mMinSize; }
 
 private:
 	S32				mDragLastScreenX;
diff --git a/indra/llui/llwindowshade.cpp b/indra/llui/llwindowshade.cpp
index ae8b30b1ba..a8bb29374e 100644
--- a/indra/llui/llwindowshade.cpp
+++ b/indra/llui/llwindowshade.cpp
@@ -176,12 +176,12 @@ void LLWindowShade::draw()
 	{
 		hide();
 	}
-	else if (notification_area->getCollapseFactor() < 0.01f)
+	else if (notification_area->getVisibleAmount() < 0.01f)
 	{
 		displayLatestNotification();
 	}
 
-	if (!notification_area->getVisible() && (notification_area->getCollapseFactor() < 0.001f))
+	if (!notification_area->getVisible() && (notification_area->getVisibleAmount() < 0.001f))
 	{
 		getChildRef<LLLayoutPanel>("background_area").setBackgroundVisible(false);
 		setMouseOpaque(false);
diff --git a/indra/newview/llchathistory.cpp b/indra/newview/llchathistory.cpp
index 42de47e777..f530d10ddc 100644
--- a/indra/newview/llchathistory.cpp
+++ b/indra/newview/llchathistory.cpp
@@ -621,7 +621,6 @@ void LLChatHistory::initFromParams(const LLChatHistory::Params& p)
 	panel_p.has_border = false;
 	panel_p.mouse_opaque = false;
 	panel_p.min_dim = 30;
-	panel_p.max_dim = S32_MAX;
 	panel_p.auto_resize = true;
 	panel_p.user_resize = false;
 
diff --git a/indra/newview/llchicletbar.cpp b/indra/newview/llchicletbar.cpp
index a879651060..a32fd307f1 100644
--- a/indra/newview/llchicletbar.cpp
+++ b/indra/newview/llchicletbar.cpp
@@ -42,28 +42,6 @@ namespace
 {
 	const std::string& PANEL_CHICLET_NAME	= "chiclet_list_panel";
 
-	S32 get_panel_min_width(LLLayoutStack* stack, LLView* panel)
-	{
-		S32 minimal_width = 0;
-		llassert(stack);
-		if ( stack && panel && panel->getVisible() )
-		{
-			stack->getPanelMinSize(panel->getName(), &minimal_width);
-		}
-		return minimal_width;
-	}
-
-	S32 get_panel_max_width(LLLayoutStack* stack, LLPanel* panel)
-	{
-		S32 max_width = 0;
-		llassert(stack);
-		if ( stack && panel && panel->getVisible() )
-		{
-			stack->getPanelMaxSize(panel->getName(), &max_width);
-		}
-		return max_width;
-	}
-
 	S32 get_curr_width(LLUICtrl* ctrl)
 	{
 		S32 cur_width = 0;
@@ -234,15 +212,10 @@ void LLChicletBar::reshape(S32 width, S32 height, BOOL called_from_parent)
 	{
 		// Firstly, update layout stack to ensure we deal with correct panel sizes.
 		{
-			BOOL saved_anim = mToolbarStack->getAnimate();
 			// Set chiclet panel to be autoresized by default.
 			mToolbarStack->updatePanelAutoResize(PANEL_CHICLET_NAME, TRUE);
-			// Disable animation to prevent layout updating in several frames.
-			mToolbarStack->setAnimate(FALSE);
 			// Force the updating of layout to reset panels collapse factor.
 			mToolbarStack->updateLayout();
-			// Restore animate state.
-			mToolbarStack->setAnimate(saved_anim);
 		}
 
 		// chiclet bar is narrowed
diff --git a/indra/newview/llfloaternotificationsconsole.cpp b/indra/newview/llfloaternotificationsconsole.cpp
index 29af81d64c..2681d4b34d 100644
--- a/indra/newview/llfloaternotificationsconsole.cpp
+++ b/indra/newview/llfloaternotificationsconsole.cpp
@@ -220,7 +220,7 @@ void LLFloaterNotificationConsole::addChannel(const std::string& name, bool open
 void LLFloaterNotificationConsole::removeChannel(const std::string& name)
 {
 	LLPanel* panelp = getChild<LLPanel>(name);
-	getChildRef<LLLayoutStack>("notification_channels").removePanel(panelp);
+	getChildRef<LLView>("notification_channels").removeChild(panelp);
 	delete panelp;
 
 	updateResizeLimits();
diff --git a/indra/newview/llimfloater.cpp b/indra/newview/llimfloater.cpp
index f5cda52d44..228260c41a 100644
--- a/indra/newview/llimfloater.cpp
+++ b/indra/newview/llimfloater.cpp
@@ -385,9 +385,6 @@ void LLIMFloater::onSlide()
 
 	getChild<LLButton>("slide_left_btn")->setVisible(mControlPanel->getParent()->getVisible());
 	getChild<LLButton>("slide_right_btn")->setVisible(!mControlPanel->getParent()->getVisible());
-
-	LLLayoutStack* stack = getChild<LLLayoutStack>("im_panels");
-	if (stack) stack->setAnimate(true);
 }
 
 //static
diff --git a/indra/newview/llsidepanelinventory.cpp b/indra/newview/llsidepanelinventory.cpp
index 9d069c3996..e40cc4662b 100644
--- a/indra/newview/llsidepanelinventory.cpp
+++ b/indra/newview/llsidepanelinventory.cpp
@@ -248,7 +248,6 @@ BOOL LLSidepanelInventory::postBuild()
 
 		// Disable user_resize on main inventory panel by default
 		inv_stack->setPanelUserResize(MAIN_INVENTORY_LAYOUT_PANEL_NAME, false);
-		inv_stack->setPanelUserResize(INBOX_OUTBOX_LAYOUT_PANEL_NAME, false);
 
 		// Collapse marketplace panel by default
 		inv_stack->collapsePanel(getChild<LLLayoutPanel>(INBOX_OUTBOX_LAYOUT_PANEL_NAME), true);
diff --git a/indra/newview/skins/default/xui/en/floater_help_browser.xml b/indra/newview/skins/default/xui/en/floater_help_browser.xml
index d101bca694..cd075abc41 100644
--- a/indra/newview/skins/default/xui/en/floater_help_browser.xml
+++ b/indra/newview/skins/default/xui/en/floater_help_browser.xml
@@ -34,7 +34,6 @@
          left_delta="0"
          top_delta="0"
          name="external_controls"
-         user_resize="false"
          width="620">
             <web_browser
              trusted_content="true" 
diff --git a/indra/newview/skins/default/xui/en/floater_im_session.xml b/indra/newview/skins/default/xui/en/floater_im_session.xml
index a2739a8339..ca73883e53 100644
--- a/indra/newview/skins/default/xui/en/floater_im_session.xml
+++ b/indra/newview/skins/default/xui/en/floater_im_session.xml
@@ -16,7 +16,7 @@
  min_width="250"
  min_height="190">
   <layout_stack
-   animate="false" 
+   animate="true" 
    default_tab_group="2"
   follows="all"
   height="320"
@@ -32,8 +32,7 @@
       min_width="115"
       width="150" 
       height="320" 
-      auto_resize="false"
-      user_resize="false">
+      auto_resize="false">
       <panel
         name="panel_im_control_panel"
         layout="topleft"
diff --git a/indra/newview/skins/default/xui/en/floater_media_browser.xml b/indra/newview/skins/default/xui/en/floater_media_browser.xml
index c3324a6aa4..ce788654aa 100644
--- a/indra/newview/skins/default/xui/en/floater_media_browser.xml
+++ b/indra/newview/skins/default/xui/en/floater_media_browser.xml
@@ -37,7 +37,6 @@
          min_height="20"
          name="nav_controls"
          top="400"
-         user_resize="false"
          width="800">
             <button
              follows="left|top"
@@ -113,7 +112,6 @@
          min_height="20"         
          name="time_controls"
          top_delta="0"
-         user_resize="false"
          width="800">
             <button
              follows="left|top"
@@ -171,7 +169,6 @@
          min_height="20"         
          name="parcel_owner_controls"
          top_delta="0"
-         user_resize="false"
          width="540">
             <button
              enabled="false"
@@ -193,7 +190,6 @@
          left_delta="0"
          name="external_controls"
          top_delta="0"
-         user_resize="false"
          width="540">
           <web_browser
              bottom="-30"
diff --git a/indra/newview/skins/default/xui/en/floater_test_layout_stacks.xml b/indra/newview/skins/default/xui/en/floater_test_layout_stacks.xml
new file mode 100644
index 0000000000..dbe75f8b53
--- /dev/null
+++ b/indra/newview/skins/default/xui/en/floater_test_layout_stacks.xml
@@ -0,0 +1,223 @@
+<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
+<floater
+ can_resize="true"
+ can_close="true"
+ bevel_style="in"
+ height="300"
+ layout="topleft"
+ min_height="40"
+ min_width="420"
+ name="Test Floater"
+ title="LAYOUTSTACK TESTS"
+ width="420">
+  <layout_stack name="test_stack"
+              left="0"
+              top="0"
+              width="100"
+              height="250"
+              follows="left|top|bottom"
+              orientation="vertical">
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="11"
+                  min_height="0"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                  min_height="0"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                  min_height="0"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+  </layout_stack>
+  <layout_stack name="test_stack"
+              left_pad="5"
+              top="0"
+              width="100"
+              height="250"
+              follows="left|top|bottom"
+              orientation="vertical">
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="100"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  visible="false"
+                  bg_alpha_color="blue"
+                  height="100"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                  auto_resize="false"
+                  user_resize="true"
+                  height="50"
+                  min_height="10"
+                  bg_alpha_color="green"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                min_height="10"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="100"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="100"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="100"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="100"
+                  visible="true"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+  </layout_stack>
+  <layout_stack name="test_stack"
+               left_pad="5"
+               top="0"
+               width="100"
+               height="250"
+               follows="left|top|bottom"
+               orientation="vertical">
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  height="11"
+                  bg_alpha_color="blue"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="11"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+  </layout_stack>
+  <layout_stack name="test_stack"
+               left_pad="5"
+               top="0"
+               width="100"
+               height="250"
+               follows="left|top|bottom"
+               orientation="vertical">
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="fixed"
+                auto_resize="false"
+                  user_resize="true"
+                height="50"
+                bg_alpha_color="green"
+                background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="black">fixed</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="11"
+                  min_height="0"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="11"
+                  min_height="0"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+    <layout_panel name="flex"
+                  auto_resize="true"
+                  user_resize="true"
+                  bg_alpha_color="blue"
+                  height="11"
+                  min_height="0"
+                  background_visible="true">
+      <text follows="top|left|right" halign="center" text_color="white">flex</text>
+    </layout_panel>
+  </layout_stack>
+</floater>
diff --git a/indra/newview/skins/default/xui/en/floater_ui_preview.xml b/indra/newview/skins/default/xui/en/floater_ui_preview.xml
index 3921cfcd2c..06d4327293 100644
--- a/indra/newview/skins/default/xui/en/floater_ui_preview.xml
+++ b/indra/newview/skins/default/xui/en/floater_ui_preview.xml
@@ -22,6 +22,7 @@ or specifying its path in the "Editor Path" field.</string>
      layout="topleft"
      left="0"
      mouse_opaque="false"
+     default_tab_group="1"
      name="main_panel"
      right="750"
      top="0">
@@ -196,6 +197,7 @@ or specifying its path in the "Editor Path" field.</string>
          left="10"
          name="name_list"
          right="-10"
+         tab_group="1"
          search_column="1"
          top="80">
             <scroll_list.columns
diff --git a/indra/newview/skins/default/xui/en/floater_voice_controls.xml b/indra/newview/skins/default/xui/en/floater_voice_controls.xml
index 6807b01fa3..cea19ec75c 100644
--- a/indra/newview/skins/default/xui/en/floater_voice_controls.xml
+++ b/indra/newview/skins/default/xui/en/floater_voice_controls.xml
@@ -49,7 +49,6 @@
          width="263">
         <layout_panel
          follows="top|left|right"
-         user_resize="false"
          auto_resize="false"
          layout="topleft"
          min_height="20"
@@ -89,7 +88,7 @@
              visible="true"
              width="20" />
         </layout_panel>
-        <layout_panel name="leave_call_panel" height="26" min_height="26" user_resize="false" auto_resize="false">
+        <layout_panel name="leave_call_panel" height="26" min_height="26" auto_resize="false">
         <layout_stack
          clip="true"
          follows="left|top|right"
@@ -110,7 +109,6 @@
           </layout_panel>
           <layout_panel
            auto_resize="false"
-           user_resize="false"
            follows="top|right"
            height="23"
            visible="true"
@@ -133,7 +131,6 @@
           top_pad="0"
           height="132"
           name="callers_panel"
-          user_resize="false" 
           auto_resize="true"
           width="280">
         <avatar_list
diff --git a/indra/newview/skins/default/xui/en/floater_web_content.xml b/indra/newview/skins/default/xui/en/floater_web_content.xml
index 57d1c92acb..cea10adca8 100644
--- a/indra/newview/skins/default/xui/en/floater_web_content.xml
+++ b/indra/newview/skins/default/xui/en/floater_web_content.xml
@@ -31,7 +31,6 @@
       min_height="20"
       name="nav_controls"
       top="400"
-      user_resize="false"
       width="770">
       <button
         image_overlay="Arrow_Left_Off"
@@ -160,7 +159,6 @@
       left_delta="0"
       name="external_controls"
       top_delta="0"
-      user_resize="false"
       auto_resize="true"
       width="585">
       <web_browser
@@ -173,8 +171,7 @@
     </layout_panel>
     <layout_panel name="status_bar" 
                   height="23"
-                  auto_resize="false"
-                  user_resize="false">
+                  auto_resize="false">
       <text
         type="string"
         length="200"
diff --git a/indra/newview/skins/default/xui/en/main_view.xml b/indra/newview/skins/default/xui/en/main_view.xml
index b4be17e677..a87027a113 100644
--- a/indra/newview/skins/default/xui/en/main_view.xml
+++ b/indra/newview/skins/default/xui/en/main_view.xml
@@ -23,7 +23,6 @@
               left="0"
               top="0"
               width="1024"
-              user_resize="false"
               auto_resize="false"
               visible="true">
       <view mouse_opaque="false"
@@ -40,7 +39,6 @@
                   name="nav_bar_container"
                   tab_stop="false"
                   width="1024"
-                  user_resize="false"
                   visible="false"/>
     <layout_panel auto_resize="true"  
                   follows="all"
diff --git a/indra/newview/skins/default/xui/en/menu_inventory_add.xml b/indra/newview/skins/default/xui/en/menu_inventory_add.xml
index 0f42000ae7..e91f5af3d5 100644
--- a/indra/newview/skins/default/xui/en/menu_inventory_add.xml
+++ b/indra/newview/skins/default/xui/en/menu_inventory_add.xml
@@ -3,6 +3,7 @@
  layout="topleft"
  left="0"
  mouse_opaque="false"
+ can_tear_off="true"
  name="menu_inventory_add"
  visible="false">
             <menu
diff --git a/indra/newview/skins/default/xui/en/panel_adhoc_control_panel.xml b/indra/newview/skins/default/xui/en/panel_adhoc_control_panel.xml
index 93cafd4a53..d68fa6ca6c 100644
--- a/indra/newview/skins/default/xui/en/panel_adhoc_control_panel.xml
+++ b/indra/newview/skins/default/xui/en/panel_adhoc_control_panel.xml
@@ -27,8 +27,7 @@
          mouse_opaque="false"
          width="147"
          top="0"
-         name="speakers_list_panel"
-         user_resize="false">
+         name="speakers_list_panel">
             <avatar_list
              color="DkGray2"
              follows="all"
@@ -50,7 +49,6 @@
          min_height="25"
          width="130"
          name="call_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="all"
@@ -68,7 +66,6 @@
          min_height="25"
          width="130"
          name="end_call_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="all"
@@ -85,7 +82,6 @@
          min_height="25"
          width="130"
          name="voice_ctrls_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="all"
diff --git a/indra/newview/skins/default/xui/en/panel_bottomtray_lite.xml b/indra/newview/skins/default/xui/en/panel_bottomtray_lite.xml
index b5e1a5f16d..f4722b05d6 100644
--- a/indra/newview/skins/default/xui/en/panel_bottomtray_lite.xml
+++ b/indra/newview/skins/default/xui/en/panel_bottomtray_lite.xml
@@ -31,7 +31,6 @@
      width="1000">
         <layout_panel
          auto_resize="false"
-         user_resize="false" 
          min_width="2"
          width="2" />
         <layout_panel
@@ -40,8 +39,7 @@
          height="28"
          layout="topleft"
          width="310"
-         min_width="188"
-         user_resize="false">
+         min_width="188">
           <panel
             left="0"
             filename="panel_nearby_chat_bar.xml"
@@ -61,8 +59,7 @@
          width="82"
          top_delta="0"
          min_width="52"
-         name="gesture_panel"
-         user_resize="false">
+         name="gesture_panel">
             <gesture_combo_list
              follows="left|right"
              height="23"
@@ -80,7 +77,6 @@
         </layout_panel>
         <layout_panel
          auto_resize="false"
-         user_resize="false" 
          min_width="3"
          name="after_gesture_panel"
          width="3"/>
diff --git a/indra/newview/skins/default/xui/en/panel_chiclet_bar.xml b/indra/newview/skins/default/xui/en/panel_chiclet_bar.xml
index 41d1036a4d..6d4008a4ed 100644
--- a/indra/newview/skins/default/xui/en/panel_chiclet_bar.xml
+++ b/indra/newview/skins/default/xui/en/panel_chiclet_bar.xml
@@ -28,7 +28,6 @@
          mouse_opaque="false"
          name="chiclet_list_panel"
          top="0"
-         user_resize="false"
          width="189">
       <chiclet_panel
              chiclet_padding="4"
@@ -78,7 +77,6 @@
       </chiclet_panel>
     </layout_panel>
     <layout_panel auto_resize="false"
-                      user_resize="false"
                       width="4"
                       min_width="4"/>
     <layout_panel
@@ -90,7 +88,6 @@
          min_width="37"
          name="im_well_panel"
          top="0"
-         user_resize="false"
          width="37">
       <chiclet_im_well
              follows="right"
@@ -139,7 +136,6 @@ image_pressed_selected  "Lit" + "Selected" - there are new messages and the Well
          min_width="37"
          name="notification_well_panel"
          top="0"
-         user_resize="false"
          width="37">
       <chiclet_notification
              follows="right"
diff --git a/indra/newview/skins/default/xui/en/panel_classified_info.xml b/indra/newview/skins/default/xui/en/panel_classified_info.xml
index 6c8d994bc6..d4a2745d1d 100644
--- a/indra/newview/skins/default/xui/en/panel_classified_info.xml
+++ b/indra/newview/skins/default/xui/en/panel_classified_info.xml
@@ -289,8 +289,7 @@
           left="0"
           top="0"
           width="290"
-          height="16"
-          user_resize="false">
+          height="16">
         <text
          follows="left|top"
          font.style="BOLD"
@@ -327,8 +326,7 @@
           left="0"
           top="0"
           width="290"
-          height="16"
-          user_resize="false">
+          height="16">
         <text
          follows="left|top"
          font.style="BOLD"
@@ -357,8 +355,7 @@
           left="0"
           top="0"
           width="290"
-          height="215"
-          user_resize="false">
+          height="215">
         <text
          auto_resize="false"
          follows="left|top"
@@ -416,7 +413,6 @@
 			  layout="bottomleft"
 			  left="0"
 			  name="layout_panel1"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="101">
 			  <button
@@ -436,7 +432,6 @@
 			  layout="bottomleft"
 			  left_pad="3"
 			  name="show_on_map_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="100">
 			  <button
@@ -455,7 +450,6 @@
 			  layout="bottomleft"
 			  left_pad="3"
 			  name="edit_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="101">
 			  <button
diff --git a/indra/newview/skins/default/xui/en/panel_edit_classified.xml b/indra/newview/skins/default/xui/en/panel_edit_classified.xml
index e512d63f9e..3509eaa285 100644
--- a/indra/newview/skins/default/xui/en/panel_edit_classified.xml
+++ b/indra/newview/skins/default/xui/en/panel_edit_classified.xml
@@ -319,7 +319,6 @@
 			  layout="bottomleft"
 			  left="0"
 			  name="save_changes_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="156">
 			  <button
@@ -339,7 +338,6 @@
 			  layout="bottomleft"
 			  left_pad="3"
 			  name="show_on_map_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="157">
 			  <button
diff --git a/indra/newview/skins/default/xui/en/panel_edit_pick.xml b/indra/newview/skins/default/xui/en/panel_edit_pick.xml
index 2ec2e03e8c..0faa1598b1 100644
--- a/indra/newview/skins/default/xui/en/panel_edit_pick.xml
+++ b/indra/newview/skins/default/xui/en/panel_edit_pick.xml
@@ -201,7 +201,6 @@
 			  layout="topleft"
 			  left="0"
 			  name="layout_panel1"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="150">
 		        <button
@@ -221,7 +220,6 @@
 			  layout="topleft"
 			  left_pad="4"
 			  name="layout_panel2"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="146">
 		        <button
diff --git a/indra/newview/skins/default/xui/en/panel_edit_profile.xml b/indra/newview/skins/default/xui/en/panel_edit_profile.xml
index 442eb8c28d..2c7c8133d1 100644
--- a/indra/newview/skins/default/xui/en/panel_edit_profile.xml
+++ b/indra/newview/skins/default/xui/en/panel_edit_profile.xml
@@ -435,7 +435,6 @@
 			  layout="bottomleft"
 			  name="save_changes_btn_lp"
 			  top="0"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="153">
         <button
@@ -456,7 +455,6 @@
 			  left_pad="3"
 			  name="show_on_map_btn_lp"
 			  top="0"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="154">
         <button
diff --git a/indra/newview/skins/default/xui/en/panel_edit_wearable.xml b/indra/newview/skins/default/xui/en/panel_edit_wearable.xml
index c8764a6a84..69a692e2c4 100644
--- a/indra/newview/skins/default/xui/en/panel_edit_wearable.xml
+++ b/indra/newview/skins/default/xui/en/panel_edit_wearable.xml
@@ -454,7 +454,6 @@
              left="0"			
              mouse_opaque="false"
              name="save_as_btn_lp"
-             user_resize="false" 
              auto_resize="true"
              width="154">
                 <button
@@ -474,7 +473,6 @@
              left_pad="3"			
              mouse_opaque="false"
              name="revert_btn_lp"
-             user_resize="false" 
              auto_resize="true"
              width="152">
                 <button
diff --git a/indra/newview/skins/default/xui/en/panel_group_control_panel.xml b/indra/newview/skins/default/xui/en/panel_group_control_panel.xml
index c1dc2aaaf7..ad10e53a4e 100644
--- a/indra/newview/skins/default/xui/en/panel_group_control_panel.xml
+++ b/indra/newview/skins/default/xui/en/panel_group_control_panel.xml
@@ -26,8 +26,7 @@
          mouse_opaque="false"
          width="145"
          top="0"
-         name="speakers_list_panel"
-         user_resize="false">
+         name="speakers_list_panel">
             <avatar_list
              color="DkGray2"
              follows="all"
@@ -48,8 +47,7 @@
          layout="topleft"
          min_height="28"
          width="130"
-         name="group_info_btn_panel"
-         user_resize="false">
+         name="group_info_btn_panel">
             <button
              follows="left|right|bottom"
              height="23"
@@ -66,8 +64,7 @@
          layout="topleft"
          min_height="28"
          width="130"
-         name="call_btn_panel"
-         user_resize="false">
+         name="call_btn_panel">
             <button
              follows="all"
              height="23"
@@ -84,7 +81,6 @@
          min_height="28"
          width="130"
          name="end_call_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="all"
@@ -101,7 +97,6 @@
          min_height="28"
          width="130"
          name="voice_ctrls_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="all"
diff --git a/indra/newview/skins/default/xui/en/panel_group_info_sidetray.xml b/indra/newview/skins/default/xui/en/panel_group_info_sidetray.xml
index ec3f3b48bc..206496cc0e 100644
--- a/indra/newview/skins/default/xui/en/panel_group_info_sidetray.xml
+++ b/indra/newview/skins/default/xui/en/panel_group_info_sidetray.xml
@@ -97,6 +97,7 @@ background_visible="true"
        follows="all"
        layout="topleft"
        auto_resize="true"
+       user_resize="true"
        height="513"
        width="313">
    <accordion
@@ -195,7 +196,6 @@ background_visible="true"
 				layout="bottomleft"
 				left="0"
 				name="btn_refresh_lp"
-			    user_resize="false" 
 			    auto_resize="false"
 				width="24">
 					<button
@@ -215,7 +215,6 @@ background_visible="true"
 				layout="bottomleft"
 				left_pad="3"
 				name="btn_chat_lp"
-			    user_resize="false" 
 			    auto_resize="true"
 				width="91">
 					<button
@@ -234,7 +233,6 @@ background_visible="true"
 				layout="bottomleft"
 				left_pad="3"
 				name="call_btn_lp"
-			    user_resize="false" 
 			    auto_resize="true"
 				width="91">
 					<button
@@ -255,7 +253,6 @@ background_visible="true"
 				layout="bottomleft"
 				left_pad="3"
 				name="btn_apply_lp"
-			    user_resize="false" 
 			    auto_resize="true"
 				width="91">
 					<button
diff --git a/indra/newview/skins/default/xui/en/panel_im_control_panel.xml b/indra/newview/skins/default/xui/en/panel_im_control_panel.xml
index 9f73b7c540..8fcd6ccbaf 100644
--- a/indra/newview/skins/default/xui/en/panel_im_control_panel.xml
+++ b/indra/newview/skins/default/xui/en/panel_im_control_panel.xml
@@ -32,8 +32,7 @@
          min_height="20"
          width="140"
          name="view_profile_btn_panel"
-         top="0" 
-         user_resize="false">
+         top="0" >
             <button
              follows="left|top|right"
              height="23"
@@ -49,8 +48,7 @@
          layout="topleft"
          min_height="25"
          width="140"
-         name="add_friend_btn_panel"
-         user_resize="false">
+         name="add_friend_btn_panel">
             <button
              follows="left|top|right"
              height="23"
@@ -66,8 +64,7 @@
          layout="topleft"
          min_height="25"
          width="140"
-         name="teleport_btn_panel"
-         user_resize="false">
+         name="teleport_btn_panel">
         <button
              auto_resize="false"
              follows="left|top|right"
@@ -84,8 +81,7 @@
          layout="topleft"
          min_height="25"
          width="140"
-         name="share_btn_panel"
-         user_resize="false">
+         name="share_btn_panel">
            <button
              auto_resize="true"
              follows="left|top|right"
@@ -101,8 +97,7 @@
          layout="topleft"
          min_height="25"
          width="140"
-         name="pay_btn_panel"
-         user_resize="false">
+         name="pay_btn_panel">
            <button
              auto_resize="true"
              follows="left|top|right"
@@ -118,8 +113,7 @@
          layout="topleft"
          min_height="25"
          width="140"
-         name="call_btn_panel"
-         user_resize="false">
+         name="call_btn_panel">
             <button
              follows="left|top|right"
              height="23"
@@ -135,7 +129,6 @@
          min_height="25"
          width="140"
          name="end_call_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="left|top|right"
@@ -152,7 +145,6 @@
          min_height="25"
          width="140"
          name="voice_ctrls_btn_panel"
-         user_resize="false"
          visible="false">
             <button
              follows="left|top|right"
@@ -169,7 +161,6 @@
        layout="topleft"
        min_height="0"
        width="140"
-       name="spacer"
-       user_resize="false" />
+       name="spacer"/>
     </layout_stack>
 </panel>
diff --git a/indra/newview/skins/default/xui/en/panel_landmarks.xml b/indra/newview/skins/default/xui/en/panel_landmarks.xml
index 23d8cb11ca..2a5933e3e9 100644
--- a/indra/newview/skins/default/xui/en/panel_landmarks.xml
+++ b/indra/newview/skins/default/xui/en/panel_landmarks.xml
@@ -114,7 +114,6 @@
 		       height="25"
 		       layout="topleft"
 		       name="options_gear_btn_panel"
-		       user_resize="false"
 		       width="32">
 		          <menu_button
 		           follows="bottom|left"
@@ -135,7 +134,6 @@
 		       height="25"
 		       layout="topleft"
 		       name="add_btn_panel"
-		       user_resize="false"
 		       width="32">
 		          <button
 		           follows="bottom|left"
@@ -156,7 +154,6 @@
 		       height="25"
 		       layout="topleft"
 		       name="dummy_panel"
-		       user_resize="false"
 		       width="212">
 		          <icon
 		           follows="bottom|left|right"
@@ -173,7 +170,6 @@
 		       height="25"
 		       layout="topleft"
 		       name="trash_btn_panel"
-		       user_resize="false"
 		       width="31">
 		          <dnd_button
 		           follows="bottom|left"
diff --git a/indra/newview/skins/default/xui/en/panel_login.xml b/indra/newview/skins/default/xui/en/panel_login.xml
index 6521bf2a4e..223326dd06 100644
--- a/indra/newview/skins/default/xui/en/panel_login.xml
+++ b/indra/newview/skins/default/xui/en/panel_login.xml
@@ -48,7 +48,6 @@ name="login"
 layout="topleft"
 width="705"
 min_width="705"
-user_resize="false"
 height="80">
 <text
 follows="left|bottom"
@@ -165,7 +164,6 @@ follows="right|bottom"
 name="links"
 width="205"
 min_width="205"
-user_resize="false"
 height="80">
    <text
 follows="right|bottom"
diff --git a/indra/newview/skins/default/xui/en/panel_main_inventory.xml b/indra/newview/skins/default/xui/en/panel_main_inventory.xml
index e6c5110999..9f84cdc43e 100644
--- a/indra/newview/skins/default/xui/en/panel_main_inventory.xml
+++ b/indra/newview/skins/default/xui/en/panel_main_inventory.xml
@@ -119,7 +119,6 @@
        height="25"
        layout="topleft"
        name="options_gear_btn_panel"
-       user_resize="false"
        width="32">
           <menu_button
            follows="bottom|left"
@@ -140,7 +139,6 @@
        height="25"
        layout="topleft"
        name="add_btn_panel"
-       user_resize="false"
        width="32">
           <button
            follows="bottom|left"
@@ -161,7 +159,6 @@
        height="25"
        layout="topleft"
        name="dummy_panel"
-       user_resize="false"
        width="212">
           <icon
            follows="bottom|left|right"
@@ -178,7 +175,6 @@
        height="25"
        layout="topleft"
        name="trash_btn_panel"
-       user_resize="false"
        width="31">
           <dnd_button
            follows="bottom|left"
diff --git a/indra/newview/skins/default/xui/en/panel_navigation_bar.xml b/indra/newview/skins/default/xui/en/panel_navigation_bar.xml
index 7a8e872dc9..9dee68efa7 100644
--- a/indra/newview/skins/default/xui/en/panel_navigation_bar.xml
+++ b/indra/newview/skins/default/xui/en/panel_navigation_bar.xml
@@ -141,7 +141,6 @@
            max_width="5"
            min_width="5"
            name="nav_bar_resize_handle_panel"
-           user_resize="false"
            width="5">
              <icon
                follows="top|right"
diff --git a/indra/newview/skins/default/xui/en/panel_nearby_media.xml b/indra/newview/skins/default/xui/en/panel_nearby_media.xml
index bfc503f05b..d1cb64f7ad 100644
--- a/indra/newview/skins/default/xui/en/panel_nearby_media.xml
+++ b/indra/newview/skins/default/xui/en/panel_nearby_media.xml
@@ -196,7 +196,6 @@
 			name="stop"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			height="22"
@@ -224,7 +223,6 @@
 			name="play"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			height="22"
@@ -252,7 +250,6 @@
 			name="pause"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			min_width="22"
@@ -279,7 +276,6 @@
 			name="volume_slider_ctrl"
 			mouse_opaque="false"
 			auto_resize="true"
-			user_resize="false"
 			follows="left|right"
 			layout="topleft"
 			top="0"
@@ -304,7 +300,6 @@
 			name="mute"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			height="72"
@@ -333,7 +328,6 @@
 			name="zoom"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			height="28"
@@ -361,7 +355,6 @@
 			name="unzoom"
 			mouse_opaque="false"
 			auto_resize="false"
-			user_resize="false"
 			layout="topleft"
 			top="0"
 			min_width="21"
@@ -388,8 +381,7 @@
 		<layout_panel
 			name="right_bookend"
 			width="0"
-			mouse_opaque="false"
-			user_resize="false" />
+			mouse_opaque="false"/>
 	  </layout_stack>
 	</panel>
   </panel>
diff --git a/indra/newview/skins/default/xui/en/panel_outfit_edit.xml b/indra/newview/skins/default/xui/en/panel_outfit_edit.xml
index e1cd78bad8..b61f110e32 100644
--- a/indra/newview/skins/default/xui/en/panel_outfit_edit.xml
+++ b/indra/newview/skins/default/xui/en/panel_outfit_edit.xml
@@ -198,7 +198,6 @@ It is calculated as border_size + 2*UIResizeBarOverlap
                  height="154"
                  name="add_button_and_combobox"
                  width="311"
-                 user_resize="false"
                  visible="true">
 
             <!-- List containing items from the COF and Base outfit -->
@@ -271,8 +270,7 @@ It is calculated as border_size + 2*UIResizeBarOverlap
                  height="30"
                  name="filter_panel"
                  width="311"
-                 visible="false"
-                 user_resize="false">
+                 visible="false">
 
                     <filter_editor
 		             background_image="TextField_Search_Off"
@@ -515,7 +513,6 @@ It is calculated as border_size + 2*UIResizeBarOverlap
                      left="0"			
                      mouse_opaque="false"
                      name="save_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="156">
         <button
@@ -550,7 +547,6 @@ It is calculated as border_size + 2*UIResizeBarOverlap
                      left_pad="3"			
                      mouse_opaque="false"
                      name="revert_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="147">
         <button
diff --git a/indra/newview/skins/default/xui/en/panel_outfits_inventory.xml b/indra/newview/skins/default/xui/en/panel_outfits_inventory.xml
index 2ad2416179..405d9513db 100644
--- a/indra/newview/skins/default/xui/en/panel_outfits_inventory.xml
+++ b/indra/newview/skins/default/xui/en/panel_outfits_inventory.xml
@@ -84,7 +84,6 @@
                      left="0"			
                      mouse_opaque="false"
                      name="save_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="156">
                     <button
@@ -118,7 +117,6 @@
                      left_pad="3"			
                      mouse_opaque="false"
                      name="wear_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="147">
                     <button
diff --git a/indra/newview/skins/default/xui/en/panel_people.xml b/indra/newview/skins/default/xui/en/panel_people.xml
index 0ebfd9c037..98c7c49ff4 100644
--- a/indra/newview/skins/default/xui/en/panel_people.xml
+++ b/indra/newview/skins/default/xui/en/panel_people.xml
@@ -284,7 +284,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 				       height="25"
 				       layout="topleft"
 				       name="options_gear_btn_panel"
-				       user_resize="false"
 				       width="32">
 				          <menu_button
 				           follows="bottom|left"
@@ -305,7 +304,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 				       height="25"
 				       layout="topleft"
 				       name="add_btn_panel"
-				       user_resize="false"
 				       width="32">
 				          <button
 				           follows="bottom|left"
@@ -326,7 +324,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 				       height="25"
 				       layout="topleft"
 				       name="dummy_panel"
-				       user_resize="false"
 				       width="210">
 				          <icon
 				           follows="bottom|left|right"
@@ -343,7 +340,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 				       height="25"
 				       layout="topleft"
 				       name="trash_btn_panel"
-				       user_resize="false"
 				       width="31">
 				          <dnd_button
 				           follows="bottom|left"
@@ -602,7 +598,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			layout="bottomleft"
 			left="0"
 			name="view_profile_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="68">
 				<button
@@ -623,7 +618,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			layout="bottomleft"
 			left_pad="3"
 			name="im_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="41">
 				<button
@@ -644,7 +638,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			layout="bottomleft"
 			left_pad="3"
 			name="call_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="52">
 				<button
@@ -665,7 +658,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			layout="bottomleft"
 			left_pad="3"
 			name="share_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="66">
 				<button
@@ -686,7 +678,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			layout="bottomleft"
 			left_pad="3"
 			name="teleport_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="77">
 				<button
@@ -720,7 +711,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			left="0"			
 			mouse_opaque="false"
 			name="group_info_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="108">
 				<button
@@ -743,7 +733,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			left_pad="3"
 			mouse_opaque="false"
 			name="chat_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="101">
 				<button
@@ -766,7 +755,6 @@ Looking for people to hang out with? Try the [secondlife:///app/worldmap World M
 			left_pad="3"
 			mouse_opaque="false"
 			name="group_call_btn_lp"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="96">
 				<button
diff --git a/indra/newview/skins/default/xui/en/panel_pick_info.xml b/indra/newview/skins/default/xui/en/panel_pick_info.xml
index 24046d5cca..79d190e1e0 100644
--- a/indra/newview/skins/default/xui/en/panel_pick_info.xml
+++ b/indra/newview/skins/default/xui/en/panel_pick_info.xml
@@ -139,7 +139,6 @@
 			  layout="bottomleft"
 			  left="0"
 			  name="layout_panel1"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="101">
 			  <button
@@ -158,7 +157,6 @@
 			  layout="bottomleft"
 			  left_pad="3"
 			  name="show_on_map_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="100">
 			  <button
@@ -177,7 +175,6 @@
 			  layout="bottomleft"
 			  left_pad="3"
 			  name="edit_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="101">
 			  <button
diff --git a/indra/newview/skins/default/xui/en/panel_picks.xml b/indra/newview/skins/default/xui/en/panel_picks.xml
index 85f402dfa2..8def96cada 100644
--- a/indra/newview/skins/default/xui/en/panel_picks.xml
+++ b/indra/newview/skins/default/xui/en/panel_picks.xml
@@ -102,7 +102,6 @@ bg_opaque_color="DkGray2"
 			  layout="bottomleft"
 			  left="0"
 			  name="gear_menu_btn"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="51">
 				<button
@@ -124,7 +123,6 @@ bg_opaque_color="DkGray2"
 			  height="18"
 			  layout="bottomleft"
 			  name="trash_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="18">
 				<button
@@ -170,7 +168,6 @@ bg_opaque_color="DkGray2"
 			  layout="topleft"
 			  left="0"
 			  name="info_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  top="0"
 			  width="95">
@@ -192,7 +189,6 @@ bg_opaque_color="DkGray2"
 			  layout="bottomleft" 
 			  left_pad="2"
 			  name="teleport_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true"
 			  width="117">
 		        <button
@@ -212,7 +208,6 @@ bg_opaque_color="DkGray2"
 			  height="28"
 			  layout="bottomleft"
 			  name="show_on_map_btn_lp"
-		      user_resize="false" 
 		      auto_resize="true" 
 			  left_pad="2"
 			  width="90">
diff --git a/indra/newview/skins/default/xui/en/panel_place_profile.xml b/indra/newview/skins/default/xui/en/panel_place_profile.xml
index e280115bda..308acf0c0c 100644
--- a/indra/newview/skins/default/xui/en/panel_place_profile.xml
+++ b/indra/newview/skins/default/xui/en/panel_place_profile.xml
@@ -238,7 +238,6 @@
                  mouse_opaque="false"
                  name="here_panel"
                  top="0"
-                 user_resize="false"
                  width="60">
                     <icon
                      follows="top|left"
@@ -259,7 +258,6 @@
                  mouse_opaque="false"
                  name="for_sale_panel"
                  top="0"
-                 user_resize="false"
                  width="60">
                     <icon
                      follows="top|left"
diff --git a/indra/newview/skins/default/xui/en/panel_places.xml b/indra/newview/skins/default/xui/en/panel_places.xml
index 670aa47313..f169dbb702 100644
--- a/indra/newview/skins/default/xui/en/panel_places.xml
+++ b/indra/newview/skins/default/xui/en/panel_places.xml
@@ -92,7 +92,6 @@ background_visible="true"
 			left="0"			
 			mouse_opaque="false"
 			name="lp1"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="193">
 			
@@ -115,7 +114,6 @@ background_visible="true"
 					left="0"			
 					mouse_opaque="false"
 					name="teleport_btn_lp"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="109">
 						<button
@@ -137,7 +135,6 @@ background_visible="true"
 					left_pad="3"
 					mouse_opaque="false"
 					name="chat_btn_lp"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="86">
 						<button
@@ -161,7 +158,6 @@ background_visible="true"
 			left_pad="0"			
 			mouse_opaque="false"
 			name="lp2"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="116">
 			
@@ -185,7 +181,6 @@ background_visible="true"
 					left_pad="0"
 					mouse_opaque="false"
 					name="edit_btn_lp"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="84">
 						<button
@@ -208,7 +203,6 @@ background_visible="true"
 					left_pad="0"
 					mouse_opaque="false"
 					name="overflow_btn_lp"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="24">
 						<menu_button
@@ -246,7 +240,6 @@ background_visible="true"
 					left_pad="3"			
 					mouse_opaque="false"
 					name="profile_btn_lp"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="102">
 						<button
@@ -283,7 +276,6 @@ background_visible="true"
 					mouse_opaque="false"
 					name="close_btn_lp"
 					top="0"
-				    user_resize="false" 
 				    auto_resize="true"
 					width="51">
 						<button
@@ -324,7 +316,6 @@ background_visible="true"
 			mouse_opaque="false"
 			name="save_btn_lp"
 			top="0"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="153">
 				<button
@@ -347,7 +338,6 @@ background_visible="true"
 			mouse_opaque="false"
 			name="cancel_btn_lp"
 			top="0"
-		    user_resize="false" 
 		    auto_resize="true"
 			width="154">
 				<button
diff --git a/indra/newview/skins/default/xui/en/panel_postcard_settings.xml b/indra/newview/skins/default/xui/en/panel_postcard_settings.xml
index 2e0bb88f53..e9427a2388 100644
--- a/indra/newview/skins/default/xui/en/panel_postcard_settings.xml
+++ b/indra/newview/skins/default/xui/en/panel_postcard_settings.xml
@@ -50,7 +50,6 @@
          layout="topleft"
          left="0"
          name="postcard_image_size_lp"
-         user_resize="false" 
          auto_resize="false"
          top="0"
          right="-1"
@@ -99,7 +98,6 @@
          layout="topleft"
          left="0"
          name="postcard_image_format_quality_lp"
-         user_resize="false" 
          auto_resize="true"
          top="0"
          right="-1"
diff --git a/indra/newview/skins/default/xui/en/panel_prim_media_controls.xml b/indra/newview/skins/default/xui/en/panel_prim_media_controls.xml
index 273c252474..198ccd6e2f 100644
--- a/indra/newview/skins/default/xui/en/panel_prim_media_controls.xml
+++ b/indra/newview/skins/default/xui/en/panel_prim_media_controls.xml
@@ -31,8 +31,7 @@
 		width="0"
 		name="left_bookend_bottom"
 		mouse_opaque="false"
-		layout="topleft"
-		user_resize="false" />
+		layout="topleft"/>
 	<layout_panel
 		name="media_progress_indicator"
 		mouse_opaque="false"
@@ -41,7 +40,6 @@
 		left="0"
 		top="0"
 		auto_resize="false"
-		user_resize="false"
 		min_width="100"
 		width="200">
 	  <progress_bar
@@ -59,8 +57,7 @@
 		name="right_bookend_bottom"
 		width="0"
 		mouse_opaque="false"
-		layout="topleft"
-		user_resize="false" />
+		layout="topleft"/>
   </layout_stack>
   <layout_stack
 	  name="media_controls"
@@ -79,13 +76,11 @@
 		top="0"
 		width="0"
 		mouse_opaque="false"
-		layout="topleft"
-		user_resize="false" />
+		layout="topleft"/>
 	<layout_panel
 		name="back"
 		top="0"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		mouse_opaque="false"
 		min_width="22"
@@ -114,7 +109,6 @@
 		name="fwd"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		min_width="22"
 		top="0"
@@ -142,7 +136,6 @@
 		name="home"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="22"
@@ -170,7 +163,6 @@
 		name="media_stop"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="22"
@@ -198,7 +190,6 @@
 		name="reload"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="22"
@@ -226,7 +217,6 @@
 		name="stop"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="22"
@@ -254,7 +244,6 @@
 		name="play"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="22"
@@ -282,7 +271,6 @@
 		name="pause"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		min_width="22"
@@ -310,7 +298,6 @@
 		name="media_address"
 		mouse_opaque="false"
 		auto_resize="true"
-		user_resize="false"
 		height="24"
 		follows="left|right|bottom"
 		layout="topleft"
@@ -343,8 +330,7 @@
 			layout="topleft"
 			width="16"
 			mouse_opaque="false"
-			auto_resize="false"
-			user_resize="false">
+			auto_resize="false">
 		  <icon
 			  name="media_whitelist_flag"
 			  follows="top|right"
@@ -358,8 +344,7 @@
 			layout="topleft"
 			width="16"
 			mouse_opaque="false"
-			auto_resize="false"
-			user_resize="false">
+			auto_resize="false">
 		  <icon
 			  name="media_secure_lock_flag"
 			  height="16"
@@ -374,7 +359,6 @@
 		name="media_play_position"
 		mouse_opaque="false"
 		auto_resize="true"
-		user_resize="false"
 		follows="left|right"
 		layout="topleft"
 		top="0"
@@ -399,7 +383,6 @@
 		name="skip_back"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		min_width="22"
@@ -428,7 +411,6 @@
 		name="skip_forward"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		min_width="22"
@@ -455,7 +437,6 @@
 		name="media_volume"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="72"
@@ -511,7 +492,6 @@
 		name="zoom_frame"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		height="28"
@@ -539,7 +519,6 @@
 		name="close"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		min_width="21"
@@ -567,7 +546,6 @@
 		name="new_window"
 		mouse_opaque="false"
 		auto_resize="false"
-		user_resize="false"
 		layout="topleft"
 		top="0"
 		min_width="22"
@@ -596,8 +574,7 @@
 		mouse_opaque="false"
 		top="0"
 		width="0"
-		layout="topleft"
-		user_resize="false" />
+		layout="topleft"/>
   </layout_stack>
   <panel
 	  name="media_region"
diff --git a/indra/newview/skins/default/xui/en/panel_progress.xml b/indra/newview/skins/default/xui/en/panel_progress.xml
index 4535c56339..7275e8d89b 100644
--- a/indra/newview/skins/default/xui/en/panel_progress.xml
+++ b/indra/newview/skins/default/xui/en/panel_progress.xml
@@ -20,14 +20,12 @@
          layout="topleft"
          min_width="10"
          name="panel1"
-         user_resize="false"
          width="150" />
         <layout_panel
          height="768"
          layout="topleft"
          min_width="640"
          name="panel2"
-         user_resize="false"
          width="640">
             <layout_stack
              follows="left|right|top|bottom"
@@ -121,7 +119,6 @@
          layout="topleft"
          min_width="10"
          name="panel6"
-         user_resize="false"
          width="150" />
     </layout_stack>
     <button
diff --git a/indra/newview/skins/default/xui/en/panel_snapshot_local.xml b/indra/newview/skins/default/xui/en/panel_snapshot_local.xml
index ae0215a578..b966358f18 100644
--- a/indra/newview/skins/default/xui/en/panel_snapshot_local.xml
+++ b/indra/newview/skins/default/xui/en/panel_snapshot_local.xml
@@ -96,7 +96,6 @@
          layout="topleft"
          left="0"
          name="local_image_size_lp"
-         user_resize="false" 
          auto_resize="false"
          top="0"
          right="-1"
@@ -145,7 +144,6 @@
          layout="topleft"
          left="0"
          name="local_image_format_quality_lp"
-         user_resize="false" 
          auto_resize="true"
          top="0"
          right="-1"
diff --git a/indra/newview/skins/default/xui/en/panel_snapshot_profile.xml b/indra/newview/skins/default/xui/en/panel_snapshot_profile.xml
index 91ac9ad658..5bd383b81e 100644
--- a/indra/newview/skins/default/xui/en/panel_snapshot_profile.xml
+++ b/indra/newview/skins/default/xui/en/panel_snapshot_profile.xml
@@ -84,7 +84,6 @@
          layout="topleft"
          left="0"
          name="profile_image_size_lp"
-         user_resize="false" 
          auto_resize="false"
          top="0"
          right="-1"
@@ -132,7 +131,6 @@
          layout="topleft"
          left="0"
          name="profile_image_metadata_lp"
-         user_resize="false" 
          auto_resize="true"
          top="0"
          right="-1"
diff --git a/indra/newview/skins/default/xui/en/panel_toolbar_view.xml b/indra/newview/skins/default/xui/en/panel_toolbar_view.xml
index 3c69a0cb6c..58911bed56 100644
--- a/indra/newview/skins/default/xui/en/panel_toolbar_view.xml
+++ b/indra/newview/skins/default/xui/en/panel_toolbar_view.xml
@@ -20,7 +20,6 @@
                 mouse_opaque="false">
   <layout_panel name="vertical_toolbar_panel"
                 auto_resize="true"
-                user_resize="false"
                 width="1024"
                 height="500"
                 mouse_opaque="false">
@@ -34,7 +33,6 @@
                   mouse_opaque="false">
       <layout_panel name="left_toolbar_panel"
                     auto_resize="false"
-                    user_resize="false"
                     height="500"
                     width="30"
                     mouse_opaque="false">
@@ -61,7 +59,6 @@
       </layout_panel>
       <layout_panel name="non_toolbar_panel"
                     auto_resize="true"
-                    user_resize="false"
                     mouse_opaque="false"
                     height="100"
                     width="200">
@@ -102,7 +99,6 @@
       </layout_panel>
       <layout_panel name="right_toolbar_panel"
                     auto_resize="false"
-                    user_resize="false"
                     height="500"
                     width="30"
                     mouse_opaque="false">
@@ -132,7 +128,6 @@
   </layout_panel>
   <layout_panel name="bottom_toolbar_panel"
                 auto_resize="false"
-                user_resize="false"
                 height="30"
                 width="1024"
                 mouse_opaque="false">
diff --git a/indra/newview/skins/default/xui/en/sidepanel_inventory.xml b/indra/newview/skins/default/xui/en/sidepanel_inventory.xml
index b52784d6bc..d4162f6d9a 100644
--- a/indra/newview/skins/default/xui/en/sidepanel_inventory.xml
+++ b/indra/newview/skins/default/xui/en/sidepanel_inventory.xml
@@ -34,7 +34,6 @@
                  min_dim="150"
                  width="330"
                  follows="bottom|left|right"
-                 user_resize="false"
                  height="300">
                  <panel
                       class="panel_main_inventory"
@@ -52,12 +51,10 @@
                  width="330"
 								 layout="topleft"
                  auto_resize="true"
-                 user_resize="false"
                  follows="bottom|left|right"
                  name="inbox_outbox_layout_panel"
                  visible="false"
                  min_dim="35"
-                 max_dim="235"
                  expanded_min_dim="125"
                  height="235">
 							 <layout_stack
@@ -75,13 +72,11 @@
                  width="330"
 								 layout="topleft"
                  auto_resize="true"
-                 user_resize="false"
                  follows="left|right|top"
                  name="inbox_layout_panel"
                  visible="false"
                  min_dim="35"
-                 max_dim="200"
-                 expanded_min_dim="90"
+
                  height="200">
                  <panel
                       follows="all"
@@ -157,12 +152,10 @@
                  width="330"
                  layout="topleft"
                  auto_resize="true"
-                 user_resize="false"
                  follows="all"
                  name="outbox_layout_panel"
                  visible="false"
                  min_dim="35"
-                 max_dim="200"
                  expanded_min_dim="90"
                  height="200">
                  <panel
@@ -312,7 +305,6 @@
                      left="0"			
                      mouse_opaque="false"
                      name="info_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="101">
                     <button
@@ -334,7 +326,6 @@
                      left_pad="1"			
                      mouse_opaque="false"
                      name="share_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="100">
                     <button
@@ -356,7 +347,6 @@
                      left_pad="1"			
                      mouse_opaque="false"
                      name="shop_btn_lp"
-                     user_resize="false" 
                      auto_resize="true"
                      width="100">
                     <button