/** 
 * @file llmenugl.cpp
 * @brief LLMenuItemGL base class
 *
 * $LicenseInfo:firstyear=2001&license=viewergpl$
 * 
 * Copyright (c) 2001-2009, Linden Research, Inc.
 * 
 * Second Life Viewer Source Code
 * The source code in this file ("Source Code") is provided by Linden Lab
 * to you under the terms of the GNU General Public License, version 2.0
 * ("GPL"), unless you have obtained a separate licensing agreement
 * ("Other License"), formally executed by you and Linden Lab.  Terms of
 * the GPL can be found in doc/GPL-license.txt in this distribution, or
 * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
 * 
 * There are special exceptions to the terms and conditions of the GPL as
 * it is applied to this Source Code. View the full text of the exception
 * in the file doc/FLOSS-exception.txt in this software distribution, or
 * online at
 * http://secondlifegrid.net/programs/open_source/licensing/flossexception
 * 
 * By copying, modifying or distributing this software, you acknowledge
 * that you have read and understood your obligations described above,
 * and agree to abide by those obligations.
 * 
 * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
 * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
 * COMPLETENESS OR PERFORMANCE.
 * $/LicenseInfo$
 */

//*****************************************************************************
//
// This file contains the opengl based menu implementation.
//
// NOTES: A menu label is split into 4 columns. The left column, the
// label colum, the accelerator column, and the right column. The left
// column is used for displaying boolean values for toggle and check
// controls. The right column is used for submenus.
//
//*****************************************************************************

//#include "llviewerprecompiledheaders.h"
#include "linden_common.h"

#include "llmenugl.h"

#include "llmath.h"
#include "llrender.h"
#include "llfocusmgr.h"
#include "llcoord.h"
#include "llwindow.h"
#include "llcriticaldamp.h"
#include "lluictrlfactory.h"

#include "llbutton.h"
#include "llfontgl.h"
#include "llresmgr.h"
#include "llui.h"

#include "llstl.h"

#include "v2math.h"
#include <set>
#include <boost/tokenizer.hpp>

// static
LLMenuHolderGL *LLMenuGL::sMenuContainer = NULL;

S32 MENU_BAR_HEIGHT = 0;
S32 MENU_BAR_WIDTH = 0;

///============================================================================
/// Local function declarations, constants, enums, and typedefs
///============================================================================

const std::string SEPARATOR_NAME("separator");
const std::string SEPARATOR_LABEL( "-----------" );
const std::string VERTICAL_SEPARATOR_LABEL( "|" );

const S32 LABEL_BOTTOM_PAD_PIXELS = 2;

const U32 LEFT_PAD_PIXELS = 3;
const U32 LEFT_WIDTH_PIXELS = 15;
const U32 LEFT_PLAIN_PIXELS = LEFT_PAD_PIXELS + LEFT_WIDTH_PIXELS;

const U32 RIGHT_PAD_PIXELS = 2;
const U32 RIGHT_WIDTH_PIXELS = 15;
const U32 RIGHT_PLAIN_PIXELS = RIGHT_PAD_PIXELS + RIGHT_WIDTH_PIXELS;

const U32 PLAIN_PAD_PIXELS = LEFT_PAD_PIXELS + LEFT_WIDTH_PIXELS + RIGHT_PAD_PIXELS + RIGHT_WIDTH_PIXELS;

const U32 BRIEF_PAD_PIXELS = 2;

const U32 SEPARATOR_HEIGHT_PIXELS = 8;
const S32 TEAROFF_SEPARATOR_HEIGHT_PIXELS = 10;
const S32 MENU_ITEM_PADDING = 4;

const std::string BOOLEAN_TRUE_PREFIX( "X" );
const std::string BRANCH_SUFFIX( ">" );
const std::string ARROW_UP  ("^^^^^^^");
const std::string ARROW_DOWN("vvvvvvv");

const F32 MAX_MOUSE_SLOPE_SUB_MENU = 0.9f;

const S32 PIE_GESTURE_ACTIVATE_DISTANCE = 10;

BOOL LLMenuGL::sKeyboardMode = FALSE;

LLHandle<LLView> LLMenuHolderGL::sItemLastSelectedHandle;
LLFrameTimer LLMenuHolderGL::sItemActivationTimer;
//LLColor4 LLMenuGL::sBackgroundColor( 0.8f, 0.8f, 0.0f, 1.0f );

const S32 PIE_CENTER_SIZE = 20;		// pixels, radius of center hole
const F32 PIE_SCALE_FACTOR = 1.7f; // scale factor for pie menu when mouse is initially down
const F32 PIE_SHRINK_TIME = 0.2f; // time of transition between unbounded and bounded display of pie menu

const F32 ACTIVATE_HIGHLIGHT_TIME = 0.3f;

static MenuRegistry::Register<LLMenuItemSeparatorGL> register_separator("menu_item_separator");
static MenuRegistry::Register<LLMenuItemCallGL> register_menu_item_call("menu_item_call");
static MenuRegistry::Register<LLMenuItemCheckGL> register_menu_item_check("menu_item_check");
static MenuRegistry::Register<LLMenuGL> register_menu("menu");

static LLDefaultChildRegistry::Register<LLMenuGL> register_menu_default("menu");



///============================================================================
/// Class LLMenuItemGL
///============================================================================
// Default constructor
LLMenuItemGL::LLMenuItemGL(const LLMenuItemGL::Params& p)
:	LLUICtrl(p),
	mJumpKey(p.jump_key),
	mAllowKeyRepeat(FALSE),
	mHighlight( FALSE ),
	mGotHover( FALSE ),
	mBriefItem( FALSE ),
	mDrawTextDisabled( FALSE ),
	mFont(p.font),
	mAcceleratorKey(KEY_NONE),
	mAcceleratorMask(MASK_NONE),
	mLabel(p.label.isProvided() ? p.label() : p.name()),
	mEnabledColor(p.enabled_color()),
	mDisabledColor(p.disabled_color()),
	mHighlightBackground(p.highlight_bg_color()),
	mHighlightForeground(p.highlight_fg_color())
{
#ifdef LL_DARWIN
	// See if this Mac accelerator should really use the ctrl key and not get mapped to cmd
	BOOL useMacCtrl = p.use_mac_ctrl;
#endif // LL_DARWIN
	
	std::string shortcut = p.shortcut;
	if (shortcut.find("control") != shortcut.npos)
	{
#ifdef LL_DARWIN
		if ( useMacCtrl )
		{
			mAcceleratorMask |= MASK_MAC_CONTROL;
		}
#endif // LL_DARWIN
		mAcceleratorMask |= MASK_CONTROL;
	}
	if (shortcut.find("alt") != shortcut.npos)
	{
		mAcceleratorMask |= MASK_ALT;
	}
	if (shortcut.find("shift") != shortcut.npos)
	{
		mAcceleratorMask |= MASK_SHIFT;
	}
	S32 pipe_pos = shortcut.rfind("|");
	std::string key_str = shortcut.substr(pipe_pos+1);

	LLKeyboard::keyFromString(key_str, &mAcceleratorKey);

	LL_DEBUGS("HotKeys") << "Process short cut key: shortcut: " << shortcut
		<< ", key str: " << key_str
		<< ", accelerator mask: " << mAcceleratorMask
		<< ", accelerator key: " << mAcceleratorKey
		<< LL_ENDL;
}

//virtual
void LLMenuItemGL::setValue(const LLSD& value)
{
	setLabel(value.asString());
}

//virtual
BOOL LLMenuItemGL::handleAcceleratorKey(KEY key, MASK mask)
{
	if( getEnabled() && (!gKeyboard->getKeyRepeated(key) || mAllowKeyRepeat) && (key == mAcceleratorKey) && (mask == (mAcceleratorMask & MASK_NORMALKEYS)) )
	{
		onCommit();
		return TRUE;
	}
	return FALSE;
}

BOOL LLMenuItemGL::handleHover(S32 x, S32 y, MASK mask)
{
	setHover(TRUE);
	getWindow()->setCursor(UI_CURSOR_ARROW);
	return TRUE;
}

//virtual
BOOL LLMenuItemGL::handleRightMouseDown(S32 x, S32 y, MASK mask)
{
	return LLUICtrl::handleRightMouseDown(x,y,mask);
}

//virtual
BOOL LLMenuItemGL::handleRightMouseUp(S32 x, S32 y, MASK mask)
{
	// If this event came from a right-click context menu spawn,
	// process as a left-click to allow menu items to be hit
	if (LLMenuHolderGL::sContextMenuSpawnPos.mX != S32_MAX
		|| LLMenuHolderGL::sContextMenuSpawnPos.mY != S32_MAX)
	{
		BOOL handled = handleMouseUp(x, y, mask);
		return handled;
	}
	return LLUICtrl::handleRightMouseUp(x,y,mask);
}

// This function checks to see if the accelerator key is already in use;
// if not, it will be added to the list
BOOL LLMenuItemGL::addToAcceleratorList(std::list <LLKeyBinding*> *listp)
{
	LLKeyBinding *accelerator = NULL;

	if (mAcceleratorKey != KEY_NONE)
	{
		std::list<LLKeyBinding*>::iterator list_it;
		for (list_it = listp->begin(); list_it != listp->end(); ++list_it)
		{
			accelerator = *list_it;
			if ((accelerator->mKey == mAcceleratorKey) && (accelerator->mMask == (mAcceleratorMask & MASK_NORMALKEYS)))
			{

			// *NOTE: get calling code to throw up warning or route
			// warning messages back to app-provided output
			//	std::string warning;
			//	warning.append("Duplicate key binding <");
			//	appendAcceleratorString( warning );
			//	warning.append("> for menu items:\n    ");
			//	warning.append(accelerator->mName);
			//	warning.append("\n    ");
			//	warning.append(mLabel);

			//	llwarns << warning << llendl;
			//	LLAlertDialog::modalAlert(warning);
				return FALSE;
			}
		}
		if (!accelerator)
		{				
			accelerator = new LLKeyBinding;
			if (accelerator)
			{
				accelerator->mKey = mAcceleratorKey;
				accelerator->mMask = (mAcceleratorMask & MASK_NORMALKEYS);
// 				accelerator->mName = mLabel;
			}
			listp->push_back(accelerator);//addData(accelerator);
		}
	}
	return TRUE;
}

// This function appends the character string representation of
// the current accelerator key and mask to the provided string.
void LLMenuItemGL::appendAcceleratorString( std::string& st ) const
{
	// break early if this is a silly thing to do.
	if( KEY_NONE == mAcceleratorKey )
	{
		return;
	}

	// Append any masks
#ifdef LL_DARWIN
	// Standard Mac names for modifier keys in menu equivalents
	// We could use the symbol characters, but they only exist in certain fonts.
	if( mAcceleratorMask & MASK_CONTROL )
	{
		if ( mAcceleratorMask & MASK_MAC_CONTROL )
		{
			st.append( "Ctrl-" );
		}
		else
		{
			st.append( "Cmd-" );		// Symbol would be "\xE2\x8C\x98"
		}
	}
	if( mAcceleratorMask & MASK_ALT )
		st.append( "Opt-" );		// Symbol would be "\xE2\x8C\xA5"
	if( mAcceleratorMask & MASK_SHIFT )
		st.append( "Shift-" );		// Symbol would be "\xE2\x8C\xA7"
#else
	if( mAcceleratorMask & MASK_CONTROL )
		st.append( "Ctrl-" );
	if( mAcceleratorMask & MASK_ALT )
		st.append( "Alt-" );
	if( mAcceleratorMask & MASK_SHIFT )
		st.append( "Shift-" );
#endif

	std::string keystr = LLKeyboard::stringFromKey( mAcceleratorKey );
	if ((mAcceleratorMask & MASK_NORMALKEYS) &&
		(keystr[0] == '-' || keystr[0] == '='))
	{
		st.append( " " );
	}
	st.append( keystr );
	LL_DEBUGS("HotKeys") << "appendAcceleratorString: " << st << LL_ENDL;
}

void LLMenuItemGL::setJumpKey(KEY key)
{
	mJumpKey = LLStringOps::toUpper((char)key);
}


// virtual 
U32 LLMenuItemGL::getNominalHeight( void ) const 
{ 
	return llround(mFont->getLineHeight()) + MENU_ITEM_PADDING; 
}

//virtual
void LLMenuItemGL::setBriefItem(BOOL brief)
{
	mBriefItem = brief;
}

//virtual
BOOL LLMenuItemGL::isBriefItem() const
{
	return mBriefItem;
}

// Get the parent menu for this item
LLMenuGL* LLMenuItemGL::getMenu() const
{
	return (LLMenuGL*) getParent();
}


// getNominalWidth() - returns the normal width of this control in
// pixels - this is used for calculating the widest item, as well as
// for horizontal arrangement.
U32 LLMenuItemGL::getNominalWidth( void ) const
{
	U32 width;
	
	if (mBriefItem)
	{
		width = BRIEF_PAD_PIXELS;
	}
	else
	{
		width = PLAIN_PAD_PIXELS;
	}

	if( KEY_NONE != mAcceleratorKey )
	{
		width += getMenu()->getShortcutPad();
		std::string temp;
		appendAcceleratorString( temp );
		width += mFont->getWidth( temp );
	}
	width += mFont->getWidth( mLabel.getWString().c_str() );
	return width;
}

// called to rebuild the draw label
void LLMenuItemGL::buildDrawLabel( void )
{
	mDrawAccelLabel.clear();
	std::string st = mDrawAccelLabel.getString();
	appendAcceleratorString( st );
	mDrawAccelLabel = st;
}

void LLMenuItemGL::onCommit( void )
{
	// close all open menus by default
	// if parent menu is actually visible (and we are not triggering menu item via accelerator)
	if (!getMenu()->getTornOff() 
		&& getMenu()->getVisible())
	{
		LLMenuGL::sMenuContainer->hideMenus();
	}
	
	LLUICtrl::onCommit();
}

// set the hover status (called by it's menu)
 void LLMenuItemGL::setHighlight( BOOL highlight )
{
	if (highlight)
	{
		getMenu()->clearHoverItem();
	}
	mHighlight = highlight;
}


BOOL LLMenuItemGL::handleKeyHere( KEY key, MASK mask )
{
	if (getHighlight() && 
		getMenu()->isOpen())
	{
		if (key == KEY_UP)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			getMenu()->highlightPrevItem(this);
			return TRUE;
		}
		else if (key == KEY_DOWN)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			getMenu()->highlightNextItem(this);
			return TRUE;
		}
		else if (key == KEY_RETURN && mask == MASK_NONE)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			onCommit();
			return TRUE;
		}
	}

	return FALSE;
}

BOOL LLMenuItemGL::handleMouseUp( S32 x, S32 y, MASK mask)
{
	// switch to mouse navigation mode
	LLMenuGL::setKeyboardMode(FALSE);

	onCommit();
	make_ui_sound("UISndClickRelease");
	return LLView::handleMouseUp(x, y, mask);
}

BOOL LLMenuItemGL::handleMouseDown( S32 x, S32 y, MASK mask)
{
	// switch to mouse navigation mode
	LLMenuGL::setKeyboardMode(FALSE);

	setHighlight(TRUE);
	return LLView::handleMouseDown(x, y, mask);
}

BOOL LLMenuItemGL::handleScrollWheel( S32 x, S32 y, S32 clicks )
{
	// If the menu is scrollable let it handle the wheel event.
	return !getMenu()->isScrollable();
}

void LLMenuItemGL::draw( void )
{
	// *FIX: This can be optimized by using switches. Want to avoid
	// that until the functionality is finalized.

	// HACK: Brief items don't highlight.  Pie menu takes care of it.  JC
	// let disabled items be highlighted, just don't draw them as such
	if( getEnabled() && getHighlight() && !mBriefItem)
	{
		int debug_count = 0;
		if (dynamic_cast<LLMenuItemCallGL*>(this))
			debug_count++;
		gGL.color4fv( mHighlightBackground.get().mV );
		gl_rect_2d( 0, getRect().getHeight(), getRect().getWidth(), 0 );
	}

	LLColor4 color;

	LLFontGL::ShadowType shadow_style = LLFontGL::NO_SHADOW;
	if (getEnabled() && !mDrawTextDisabled )
	{
		shadow_style = LLFontGL::DROP_SHADOW_SOFT;
	}

	if ( getEnabled() && getHighlight() )
	{
		color = mHighlightForeground.get();
	}
	else if( getEnabled() && !mDrawTextDisabled )
	{
		color = mEnabledColor.get();
	}
	else
	{
		color = mDisabledColor.get();
	}

	// Draw the text on top.
	if (mBriefItem)
	{
		mFont->render( mLabel, 0, BRIEF_PAD_PIXELS / 2, 0, color,
					   LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style );
	}
	else
	{
		if( !mDrawBoolLabel.empty() )
		{
			mFont->render( mDrawBoolLabel.getWString(), 0, (F32)LEFT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
						   LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style, S32_MAX, S32_MAX, NULL, FALSE );
		}
		mFont->render( mLabel.getWString(), 0, (F32)LEFT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
					   LLFontGL::LEFT, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style, S32_MAX, S32_MAX, NULL, FALSE );
		if( !mDrawAccelLabel.empty() )
		{
			mFont->render( mDrawAccelLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PLAIN_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
						   LLFontGL::RIGHT, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style, S32_MAX, S32_MAX, NULL, FALSE );
		}
		if( !mDrawBranchLabel.empty() )
		{
			mFont->render( mDrawBranchLabel.getWString(), 0, (F32)getRect().mRight - (F32)RIGHT_PAD_PIXELS, ((F32)MENU_ITEM_PADDING / 2.f) + 1.f, color,
						   LLFontGL::RIGHT, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style, S32_MAX, S32_MAX, NULL, FALSE );
		}
	}

	// underline "jump" key only when keyboard navigation has been initiated
	if (getMenu()->jumpKeysActive() && LLMenuGL::getKeyboardMode())
	{
		std::string upper_case_label = mLabel.getString();
		LLStringUtil::toUpper(upper_case_label);
		std::string::size_type offset = upper_case_label.find(mJumpKey);
		if (offset != std::string::npos)
		{
			S32 x_begin = LEFT_PLAIN_PIXELS + mFont->getWidth(mLabel, 0, offset);
			S32 x_end = LEFT_PLAIN_PIXELS + mFont->getWidth(mLabel, 0, offset + 1);
			gl_line_2d(x_begin, (MENU_ITEM_PADDING / 2) + 1, x_end, (MENU_ITEM_PADDING / 2) + 1);
		}
	}

	// clear got hover every frame
	setHover(FALSE);
}

BOOL LLMenuItemGL::setLabelArg( const std::string& key, const LLStringExplicit& text )
{
	mLabel.setArg(key, text);
	return TRUE;
}

void LLMenuItemGL::handleVisibilityChange(BOOL new_visibility)
{
	if (getMenu())
	{
		getMenu()->needsArrange();
	}
	LLView::handleVisibilityChange(new_visibility);
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLMenuItemSeparatorGL
//
// This class represents a separator.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
LLMenuItemSeparatorGL::Params::Params()
{
	name = "separator";
	label = SEPARATOR_LABEL;
}

LLMenuItemSeparatorGL::LLMenuItemSeparatorGL(const LLMenuItemSeparatorGL::Params& p) :
	LLMenuItemGL( p )
{
}

//virtual
U32 LLMenuItemSeparatorGL::getNominalHeight( void ) const
{
	return SEPARATOR_HEIGHT_PIXELS;
}

void LLMenuItemSeparatorGL::draw( void )
{
	gGL.color4fv( mDisabledColor.get().mV );
	const S32 y = getRect().getHeight() / 2;
	const S32 PAD = 6;
	gl_line_2d( PAD, y, getRect().getWidth() - PAD, y );
}

BOOL LLMenuItemSeparatorGL::handleMouseDown(S32 x, S32 y, MASK mask)
{
	LLMenuGL* parent_menu = getMenu();
	if (y > getRect().getHeight() / 2)
	{
		LLView* prev_menu_item = parent_menu->findPrevSibling(this);
		return prev_menu_item ? prev_menu_item->handleMouseDown(x, prev_menu_item->getRect().getHeight(), mask) : FALSE;
	}
	else
	{
		LLView* next_menu_item = parent_menu->findNextSibling(this);
		return next_menu_item ? next_menu_item->handleMouseDown(x, 0, mask) : FALSE;
	}
}

BOOL LLMenuItemSeparatorGL::handleMouseUp(S32 x, S32 y, MASK mask) 
{
	LLMenuGL* parent_menu = getMenu();
	if (y > getRect().getHeight() / 2)
	{
		LLView* prev_menu_item = parent_menu->findPrevSibling(this);
		return prev_menu_item ? prev_menu_item->handleMouseUp(x, prev_menu_item->getRect().getHeight(), mask) : FALSE;
	}
	else
	{
		LLView* next_menu_item = parent_menu->findNextSibling(this);
		return next_menu_item ? next_menu_item->handleMouseUp(x, 0, mask) : FALSE;
	}
}

BOOL LLMenuItemSeparatorGL::handleHover(S32 x, S32 y, MASK mask) 
{
	LLMenuGL* parent_menu = getMenu();
	if (y > getRect().getHeight() / 2)
	{
		parent_menu->highlightPrevItem(this, FALSE);
		return FALSE;
	}
	else
	{
		parent_menu->highlightNextItem(this, FALSE);
		return FALSE;
	}
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLMenuItemVerticalSeparatorGL
//
// This class represents a vertical separator.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLMenuItemVerticalSeparatorGL
:	public LLMenuItemSeparatorGL
{
public:
	LLMenuItemVerticalSeparatorGL( void );

	virtual BOOL handleMouseDown(S32 x, S32 y, MASK mask) { return FALSE; }
};

LLMenuItemVerticalSeparatorGL::LLMenuItemVerticalSeparatorGL( void )
{
	setLabel( VERTICAL_SEPARATOR_LABEL );
}

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLMenuItemTearOffGL
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
LLMenuItemTearOffGL::LLMenuItemTearOffGL(const LLMenuItemTearOffGL::Params& p) 
:	LLMenuItemGL(p), 
	mParentHandle(p.parent_floater_handle)
{
}


void LLMenuItemTearOffGL::onCommit()
{
	if (getMenu()->getTornOff())
	{
		LLTearOffMenu* torn_off_menu = (LLTearOffMenu*)(getMenu()->getParent());
		torn_off_menu->closeFloater();
	}
	else
	{
		// transfer keyboard focus and highlight to first real item in list
		if (getHighlight())
		{
			getMenu()->highlightNextItem(this);
		}

		getMenu()->needsArrange();

		LLFloater* parent_floater = mParentHandle.get();
		LLFloater* tear_off_menu = LLTearOffMenu::create(getMenu());

		if (tear_off_menu)
		{
			if (parent_floater)
			{
				parent_floater->addDependentFloater(tear_off_menu, FALSE);
			}

			// give focus to torn off menu because it will have
			// been taken away when parent menu closes
			tear_off_menu->setFocus(TRUE);
		}
	}
	LLMenuItemGL::onCommit();
}

void LLMenuItemTearOffGL::draw()
{
	// disabled items can be highlighted, but shouldn't render as such
	if( getEnabled() && getHighlight() && !isBriefItem())
	{
		gGL.color4fv( mHighlightBackground.get().mV );
		gl_rect_2d( 0, getRect().getHeight(), getRect().getWidth(), 0 );
	}

	if (getEnabled())
	{
		gGL.color4fv( mEnabledColor.get().mV );
	}
	else
	{
		gGL.color4fv( mDisabledColor.get().mV );
	}
	const S32 y = getRect().getHeight() / 3;
	const S32 PAD = 6;
	gl_line_2d( PAD, y, getRect().getWidth() - PAD, y );
	gl_line_2d( PAD, y * 2, getRect().getWidth() - PAD, y * 2 );
}

U32 LLMenuItemTearOffGL::getNominalHeight( void ) const 
{ 
	return TEAROFF_SEPARATOR_HEIGHT_PIXELS; 
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLMenuItemBlankGL
//
// This class represents a blank, non-functioning item.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLMenuItemBlankGL : public LLMenuItemGL
{
public:
	struct Params : public LLInitParam::Block<Params, LLMenuItemGL::Params>
	{
		Params()
		{
			name="";
			enabled = false;
		}
	};
	LLMenuItemBlankGL( const Params& p ) :	LLMenuItemGL( p )
	{}
	virtual void draw( void ) {}
};


///============================================================================
/// Class LLMenuItemCallGL
///============================================================================

LLMenuItemCallGL::LLMenuItemCallGL(const LLMenuItemCallGL::Params& p)
:	LLMenuItemGL(p)
{
}

void LLMenuItemCallGL::initFromParams(const Params& p)
{
	if (p.on_enable.isProvided())
	{
		initEnableCallback(p.on_enable, mEnableSignal);
		// Set the enabled control variable (for backwards compatability)
		if (p.on_enable.control_name.isProvided() && !p.on_enable.control_name().empty())
		{
			LLControlVariable* control = findControl(p.on_enable.control_name());
			if (control)
				setEnabledControlVariable(control);
		}
	}
	if (p.on_click.isProvided())
		initCommitCallback(p.on_click, mCommitSignal);
		
	LLUICtrl::initFromParams(p);
}

void LLMenuItemCallGL::onCommit( void )
{
	// RN: menu item can be deleted in callback, so beware
	getMenu()->setItemLastSelected( this );
	
	LLMenuItemGL::onCommit();
}

void LLMenuItemCallGL::updateEnabled( void )
{
	if (mEnableSignal.num_slots() > 0)
	{
		bool enabled = mEnableSignal(this, LLSD());
		if (mEnabledControlVariable)
		{
			if (!enabled)
				mEnabledControlVariable->set(false); // callback overrides control variable; this will call setEnabled()
		}
		else
		{
			setEnabled(enabled);
		}
	}
}

void LLMenuItemCallGL::buildDrawLabel( void )
{
	updateEnabled();
	LLMenuItemGL::buildDrawLabel();
}

BOOL LLMenuItemCallGL::handleKeyHere( KEY key, MASK mask )
{
	return LLMenuItemGL::handleKeyHere(key, mask);
}

BOOL LLMenuItemCallGL::handleAcceleratorKey( KEY key, MASK mask )
{
	if( (!gKeyboard->getKeyRepeated(key) || getAllowKeyRepeat()) && (key == mAcceleratorKey) && (mask == (mAcceleratorMask & MASK_NORMALKEYS)) )
	{
		updateEnabled();
		if (getEnabled())
		{
			onCommit();
			return TRUE;
		}
	}
	return FALSE;
}

// handleRightMouseUp moved into base class LLMenuItemGL so clicks are
// handled for all menu item types

///============================================================================
/// Class LLMenuItemCheckGL
///============================================================================
LLMenuItemCheckGL::LLMenuItemCheckGL (const LLMenuItemCheckGL::Params& p)
:	LLMenuItemCallGL(p)
{
}

void LLMenuItemCheckGL::initFromParams(const Params& p)
{
	if (p.on_check.isProvided())
	{
		initEnableCallback(p.on_check, mCheckSignal);
		// Set the control name (for backwards compatability)
		if (p.on_check.control_name.isProvided() && !p.on_check.control_name().empty())
		{
			setControlName(p.on_check.control_name());
		}
	}
		
	LLMenuItemCallGL::initFromParams(p);
}

void LLMenuItemCheckGL::onCommit( void )
{
	LLMenuItemCallGL::onCommit();
}

//virtual
void LLMenuItemCheckGL::setValue(const LLSD& value)
{
	LLUICtrl::setValue(value);
	if(value.asBoolean())
	{
		mDrawBoolLabel = BOOLEAN_TRUE_PREFIX;
	}
	else
	{
		mDrawBoolLabel.clear();
	}
}

// called to rebuild the draw label
void LLMenuItemCheckGL::buildDrawLabel( void )
{
	// Note: mCheckSignal() returns true if no callbacks are set
	bool checked = mCheckSignal(this, LLSD());
	if (mControlVariable)
	{
		if (!checked) 
			setControlValue(false); // callback overrides control variable; this will call setValue()
	}
	else
	{
		setValue(checked);
	}
	if(getValue().asBoolean())
	{
		mDrawBoolLabel = BOOLEAN_TRUE_PREFIX;
	}
	else
	{
		mDrawBoolLabel.clear();
	}
	LLMenuItemCallGL::buildDrawLabel();
}

///============================================================================
/// Class LLMenuItemBranchGL
///============================================================================
LLMenuItemBranchGL::LLMenuItemBranchGL(const LLMenuItemBranchGL::Params& p)
  : LLMenuItemGL(p)
{
	LLMenuGL* branch = p.branch;
	if (branch)
	{
		mBranchHandle = branch->getHandle();
		branch->setVisible(FALSE);
		branch->setParentMenuItem(this);
	}
}

LLMenuItemBranchGL::~LLMenuItemBranchGL()
{
	LLView::deleteViewByHandle(mBranchHandle);
}

// virtual
LLView* LLMenuItemBranchGL::getChildView(const std::string& name, BOOL recurse) const
{
	LLMenuGL* branch = getBranch();
	if (branch)
	{
		if (branch->getName() == name)
		{
			return branch;
		}

		// Always recurse on branches
		return branch->getChildView(name, recurse);
	}

	return LLView::getChildView(name, recurse);
}

LLView* LLMenuItemBranchGL::findChildView(const std::string& name, BOOL recurse) const
{
	LLMenuGL* branch = getBranch();
	if (branch)
	{
		if (branch->getName() == name)
		{
			return branch;
		}

		// Always recurse on branches
		return branch->findChildView(name, recurse);
	}

	return LLView::findChildView(name, recurse);
}

// virtual
BOOL LLMenuItemBranchGL::handleMouseUp(S32 x, S32 y, MASK mask)
{
	// switch to mouse navigation mode
	LLMenuGL::setKeyboardMode(FALSE);

	onCommit();
	make_ui_sound("UISndClickRelease");
	return TRUE;
}

BOOL LLMenuItemBranchGL::handleAcceleratorKey(KEY key, MASK mask)
{
	return getBranch() && getBranch()->handleAcceleratorKey(key, mask);
}

// This function checks to see if the accelerator key is already in use;
// if not, it will be added to the list
BOOL LLMenuItemBranchGL::addToAcceleratorList(std::list<LLKeyBinding*> *listp)
{
	LLMenuGL* branch = getBranch();
	if (!branch)
		return FALSE;

	U32 item_count = branch->getItemCount();
	LLMenuItemGL *item;
	
	while (item_count--)
	{
		if ((item = branch->getItem(item_count)))
		{
			return item->addToAcceleratorList(listp);
		}
	}

	return FALSE;
}


// called to rebuild the draw label
void LLMenuItemBranchGL::buildDrawLabel( void )
{
	mDrawAccelLabel.clear();
	std::string st = mDrawAccelLabel;
	appendAcceleratorString( st );
	mDrawAccelLabel = st;
	mDrawBranchLabel = BRANCH_SUFFIX;
}

void LLMenuItemBranchGL::onCommit( void )
{
	openMenu();

	// keyboard navigation automatically propagates highlight to sub-menu
	// to facilitate fast menu control via jump keys
	if (LLMenuGL::getKeyboardMode() && getBranch()&& !getBranch()->getHighlightedItem())
	{
		getBranch()->highlightNextItem(NULL);
	}
	
	LLUICtrl::onCommit();
}

BOOL LLMenuItemBranchGL::handleKey(KEY key, MASK mask, BOOL called_from_parent)
{
	BOOL handled = FALSE;
	if (getBranch() && called_from_parent)
	{
		handled = getBranch()->handleKey(key, mask, called_from_parent);
	}

	if (!handled)
	{
		handled = LLMenuItemGL::handleKey(key, mask, called_from_parent);
	}

	return handled;
}

BOOL LLMenuItemBranchGL::handleUnicodeChar(llwchar uni_char, BOOL called_from_parent)
{
	BOOL handled = FALSE;
	if (getBranch() && called_from_parent)
	{
		handled = getBranch()->handleUnicodeChar(uni_char, TRUE);
	}

	if (!handled)
	{
		handled = LLMenuItemGL::handleUnicodeChar(uni_char, called_from_parent);
	}

	return handled;
}


void LLMenuItemBranchGL::setHighlight( BOOL highlight )
{
	if (highlight == getHighlight())
		return;

	LLMenuGL* branch = getBranch();
	if (!branch)
		return;

	BOOL auto_open = getEnabled() && (!branch->getVisible() || branch->getTornOff());
	// torn off menus don't open sub menus on hover unless they have focus
	if (getMenu()->getTornOff() && !((LLFloater*)getMenu()->getParent())->hasFocus())
	{
		auto_open = FALSE;
	}
	// don't auto open torn off sub-menus (need to explicitly active menu item to give them focus)
	if (branch->getTornOff())
	{
		auto_open = FALSE;
	}
	LLMenuItemGL::setHighlight(highlight);
	if( highlight )
	{
		if(auto_open)
		{
			openMenu();
		}
	}
	else
	{
		if (branch->getTornOff())
		{
			((LLFloater*)branch->getParent())->setFocus(FALSE);
			branch->clearHoverItem();
		}
		else
		{
			branch->setVisible( FALSE );
		}
	}
}

void LLMenuItemBranchGL::draw()
{
	LLMenuItemGL::draw();
	if (getBranch() && getBranch()->getVisible() && !getBranch()->getTornOff())
	{
		setHighlight(TRUE);
	}
}

void LLMenuItemBranchGL::updateBranchParent(LLView* parentp)
{
	if (getBranch() && getBranch()->getParent() == NULL)
	{
		// make the branch menu a sibling of my parent menu
		getBranch()->updateParent(parentp);
	}
}

void LLMenuItemBranchGL::handleVisibilityChange( BOOL new_visibility )
{
	if (new_visibility == FALSE && getBranch() && !getBranch()->getTornOff())
	{
		getBranch()->setVisible(FALSE);
	}
	LLMenuItemGL::handleVisibilityChange(new_visibility);
}

BOOL LLMenuItemBranchGL::handleKeyHere( KEY key, MASK mask )
{
	LLMenuGL* branch = getBranch();
	if (!branch)
		return LLMenuItemGL::handleKeyHere(key, mask);

	if (getMenu()->getVisible() && branch->getVisible() && key == KEY_LEFT)
	{
		// switch to keyboard navigation mode
		LLMenuGL::setKeyboardMode(TRUE);

		BOOL handled = branch->clearHoverItem();
		if (branch->getTornOff())
		{
			((LLFloater*)branch->getParent())->setFocus(FALSE);
		}
		if (handled && getMenu()->getTornOff())
		{
			((LLFloater*)getMenu()->getParent())->setFocus(TRUE);
		}
		return handled;
	}

	if (getHighlight() && 
		getMenu()->isOpen() && 
		key == KEY_RIGHT && !branch->getHighlightedItem())
	{
		// switch to keyboard navigation mode
		LLMenuGL::setKeyboardMode(TRUE);

		LLMenuItemGL* itemp = branch->highlightNextItem(NULL);
		if (itemp)
		{
			return TRUE;
		}
	}

	return LLMenuItemGL::handleKeyHere(key, mask);
}

//virtual
BOOL LLMenuItemBranchGL::isActive() const
{
	return isOpen() && getBranch() && getBranch()->getHighlightedItem();
}

//virtual
BOOL LLMenuItemBranchGL::isOpen() const
{
	return getBranch() && getBranch()->isOpen();
}

void LLMenuItemBranchGL::openMenu()
{
	LLMenuGL* branch = getBranch();
	if (!branch)
		return;

	if (branch->getTornOff())
	{
		gFloaterView->bringToFront((LLFloater*)branch->getParent());
		// this might not be necessary, as torn off branches don't get focus and hence no highligth
		branch->highlightNextItem(NULL);
	}
	else if( !branch->getVisible() )
	{
		// get valid rectangle for menus
		const LLRect menu_region_rect = LLMenuGL::sMenuContainer->getMenuRect();

		branch->arrange();

		LLRect rect = branch->getRect();
		// calculate root-view relative position for branch menu
		S32 left = getRect().mRight;
		S32 top = getRect().mTop - getRect().mBottom;

		localPointToOtherView(left, top, &left, &top, branch->getParent());

		rect.setLeftTopAndSize( left, top,
								rect.getWidth(), rect.getHeight() );

		if (branch->getCanTearOff())
		{
			rect.translate(0, TEAROFF_SEPARATOR_HEIGHT_PIXELS);
		}
		branch->setRect( rect );
		S32 x = 0;
		S32 y = 0;
		branch->localPointToOtherView( 0, 0, &x, &y, branch->getParent() ); 
		S32 delta_x = 0;
		S32 delta_y = 0;
		if( y < menu_region_rect.mBottom )
		{
			delta_y = menu_region_rect.mBottom - y;
		}

		S32 menu_region_width = menu_region_rect.getWidth();
		if( x - menu_region_rect.mLeft > menu_region_width - rect.getWidth() )
		{
			// move sub-menu over to left side
			delta_x = llmax(-x, (-1 * (rect.getWidth() + getRect().getWidth())));
		}
		branch->translate( delta_x, delta_y );
		branch->setVisible( TRUE );
		branch->getParent()->sendChildToFront(branch);
	}
}


//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Class LLMenuItemBranchDownGL
//
// The LLMenuItemBranchDownGL represents a menu item that has a
// sub-menu. This is used to make menu bar menus.
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

class LLMenuItemBranchDownGL : public LLMenuItemBranchGL
{
protected:

public:
	LLMenuItemBranchDownGL( const Params& );

	// returns the normal width of this control in pixels - this is
	// used for calculating the widest item, as well as for horizontal
	// arrangement.
	virtual U32 getNominalWidth( void ) const;

	// called to rebuild the draw label
	virtual void buildDrawLabel( void );

	// handles opening, positioning, and arranging the menu branch associated with this item
	virtual void openMenu( void );

	// set the hover status (called by it's menu) and if the object is
	// active. This is used for behavior transfer.
	virtual void setHighlight( BOOL highlight );

	virtual BOOL isActive( void ) const;

	// LLView functionality
	virtual BOOL handleMouseDown( S32 x, S32 y, MASK mask );
	virtual BOOL handleMouseUp( S32 x, S32 y, MASK mask ); 
	virtual void draw( void );
	virtual BOOL handleKeyHere(KEY key, MASK mask);
	
	virtual BOOL handleAcceleratorKey(KEY key, MASK mask);
};

LLMenuItemBranchDownGL::LLMenuItemBranchDownGL( const Params& p) :
	LLMenuItemBranchGL(p)
{
}

// returns the normal width of this control in pixels - this is used
// for calculating the widest item, as well as for horizontal
// arrangement.
U32 LLMenuItemBranchDownGL::getNominalWidth( void ) const
{
	U32 width = LEFT_PAD_PIXELS + LEFT_WIDTH_PIXELS + RIGHT_PAD_PIXELS;
	width += getFont()->getWidth( mLabel.getWString().c_str() ); 
	return width;
}

// called to rebuild the draw label
void LLMenuItemBranchDownGL::buildDrawLabel( void )
{
	mDrawAccelLabel.clear();
	std::string st = mDrawAccelLabel;
	appendAcceleratorString( st );
	mDrawAccelLabel = st;
}

void LLMenuItemBranchDownGL::openMenu( void )
{
	LLMenuGL* branch = getBranch();
	if( branch->getVisible() && !branch->getTornOff() )
	{
		branch->setVisible( FALSE );
	}
	else
	{
		if (branch->getTornOff())
		{
			gFloaterView->bringToFront((LLFloater*)branch->getParent());
		}
		else
		{
			// We're showing the drop-down menu, so patch up its labels/rects
			branch->arrange();

			LLRect rect = branch->getRect();
			S32 left = 0;
			S32 top = getRect().mBottom;
			localPointToOtherView(left, top, &left, &top, branch->getParent());

			rect.setLeftTopAndSize( left, top,
									rect.getWidth(), rect.getHeight() );
			branch->setRect( rect );
			S32 x = 0;
			S32 y = 0;
			branch->localPointToScreen( 0, 0, &x, &y ); 
			S32 delta_x = 0;

			LLCoordScreen window_size;
			LLWindow* windowp = getWindow();
			windowp->getSize(&window_size);

			S32 window_width = window_size.mX;
			if( x > window_width - rect.getWidth() )
			{
				delta_x = (window_width - rect.getWidth()) - x;
			}
			branch->translate( delta_x, 0 );

			setHighlight(TRUE);
			branch->setVisible( TRUE );
			branch->getParent()->sendChildToFront(branch);
		}
	}
}

// set the hover status (called by it's menu)
void LLMenuItemBranchDownGL::setHighlight( BOOL highlight )
{
 	if (highlight == getHighlight())
		return;

	//NOTE: Purposely calling all the way to the base to bypass auto-open.
	LLMenuItemGL::setHighlight(highlight);

	LLMenuGL* branch = getBranch();
	if (!branch)
		return;
	
	if( !highlight)
	{
		if (branch->getTornOff())
		{
			((LLFloater*)branch->getParent())->setFocus(FALSE);
			branch->clearHoverItem();
		}
		else
		{
			branch->setVisible( FALSE );
		}
	}
}

BOOL LLMenuItemBranchDownGL::isActive() const
{
	// for top level menus, being open is sufficient to be considered 
	// active, because clicking on them with the mouse will open
	// them, without moving keyboard focus to them
	return isOpen();
}

BOOL LLMenuItemBranchDownGL::handleMouseDown( S32 x, S32 y, MASK mask )
{
	// switch to mouse control mode
	LLMenuGL::setKeyboardMode(FALSE);
	onCommit();
	make_ui_sound("UISndClick");
	return TRUE;
}

BOOL LLMenuItemBranchDownGL::handleMouseUp( S32 x, S32 y, MASK mask )
{
	return TRUE;
}


BOOL LLMenuItemBranchDownGL::handleAcceleratorKey(KEY key, MASK mask)
{
	BOOL branch_visible = getBranch()->getVisible();
	BOOL handled = getBranch()->handleAcceleratorKey(key, mask);
	if (handled && !branch_visible && getVisible())
	{
		// flash this menu entry because we triggered an invisible menu item
		LLMenuHolderGL::setActivatedItem(this);
	}

	return handled;
}

BOOL LLMenuItemBranchDownGL::handleKeyHere(KEY key, MASK mask)
{
	BOOL menu_open = getBranch()->getVisible();
	// don't do keyboard navigation of top-level menus unless in keyboard mode, or menu expanded
	if (getHighlight() && getMenu()->getVisible() && (isActive() || LLMenuGL::getKeyboardMode()))
	{
		if (key == KEY_LEFT)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			LLMenuItemGL* itemp = getMenu()->highlightPrevItem(this);
			// open new menu only if previous menu was open
			if (itemp && itemp->getEnabled() && menu_open)
			{
				itemp->onCommit();
			}

			return TRUE;
		}
		else if (key == KEY_RIGHT)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			LLMenuItemGL* itemp = getMenu()->highlightNextItem(this);
			// open new menu only if previous menu was open
			if (itemp && itemp->getEnabled() && menu_open)
			{
				itemp->onCommit();
			}

			return TRUE;
		}
		else if (key == KEY_DOWN)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			if (!isActive())
			{
				onCommit();
			}
			getBranch()->highlightNextItem(NULL);
			return TRUE;
		}
		else if (key == KEY_UP)
		{
			// switch to keyboard navigation mode
			LLMenuGL::setKeyboardMode(TRUE);

			if (!isActive())
			{
				onCommit();
			}
			getBranch()->highlightPrevItem(NULL);
			return TRUE;
		}
	}

	return FALSE;
}

void LLMenuItemBranchDownGL::draw( void )
{
	//FIXME: try removing this
	if (getBranch()->getVisible() && !getBranch()->getTornOff())
	{
		setHighlight(TRUE);
	}

	if( getHighlight() )
	{
		gGL.color4fv( mHighlightBackground.get().mV );
		gl_rect_2d( 0, getRect().getHeight(), getRect().getWidth(), 0 );
	}

	LLFontGL::ShadowType shadow_style = LLFontGL::NO_SHADOW;
	if (getEnabled() && !getDrawTextDisabled() )
	{
		shadow_style = LLFontGL::DROP_SHADOW_SOFT;
	}

	LLColor4 color;
	if (getHighlight())
	{
		color = mHighlightForeground.get();
	}
	else if( getEnabled() )
	{
		color = mEnabledColor.get();
	}
	else
	{
		color = mDisabledColor.get();
	}
	getFont()->render( mLabel.getWString(), 0, (F32)getRect().getWidth() / 2.f, (F32)LABEL_BOTTOM_PAD_PIXELS, color,
				   LLFontGL::HCENTER, LLFontGL::BOTTOM, LLFontGL::NORMAL, shadow_style );


	// underline navigation key only when keyboard navigation has been initiated
	if (getMenu()->jumpKeysActive() && LLMenuGL::getKeyboardMode())
	{
		std::string upper_case_label = mLabel.getString();
		LLStringUtil::toUpper(upper_case_label);
		std::string::size_type offset = upper_case_label.find(getJumpKey());
		if (offset != std::string::npos)
		{
			S32 x_offset = llround((F32)getRect().getWidth() / 2.f - getFont()->getWidthF32(mLabel.getString(), 0, S32_MAX) / 2.f);
			S32 x_begin = x_offset + getFont()->getWidth(mLabel, 0, offset);
			S32 x_end = x_offset + getFont()->getWidth(mLabel, 0, offset + 1);
			gl_line_2d(x_begin, LABEL_BOTTOM_PAD_PIXELS, x_end, LABEL_BOTTOM_PAD_PIXELS);
		}
	}

	// reset every frame so that we only show highlight 
	// when we get hover events on that frame
	setHover(FALSE);
}


class LLMenuScrollItem : public LLMenuItemCallGL
{
public:
	enum EArrowType
	{
		ARROW_DOWN,
		ARROW_UP
	};
	struct ArrowTypes : public LLInitParam::TypeValuesHelper<EArrowType, ArrowTypes>
	{
		static void declareValues()
		{
			declare("up", ARROW_UP);
			declare("down", ARROW_DOWN);
		}
	};

	struct Params : public LLInitParam::Block<Params, LLMenuItemCallGL::Params>
	{
		Optional<EArrowType, ArrowTypes> arrow_type;
		Optional<CommitCallbackParam> scroll_callback;
	};

protected:
	LLMenuScrollItem(const Params&);
	friend class LLUICtrlFactory;

public:
	/*virtual*/ void draw();
	/*virtual*/ void reshape(S32 width, S32 height, BOOL called_from_parent);
	/*virtual*/ void setEnabled(BOOL enabled);
	virtual void onCommit( void );

private:
	LLButton*				mArrowBtn;
};

LLMenuScrollItem::LLMenuScrollItem(const Params& p)
:	LLMenuItemCallGL(p)
{
	std::string icon;
	if (p.arrow_type.isProvided() && p.arrow_type == ARROW_UP)
	{
		icon = "arrow_up.tga";
	}
	else
	{
		icon = "arrow_down.tga";
	}

	LLButton::Params bparams;
	bparams.label("");
	bparams.label_selected("");
	bparams.mouse_opaque(true);
	bparams.scale_image(false);
	bparams.click_callback(p.scroll_callback);
	bparams.mouse_held_callback(p.scroll_callback);
	bparams.follows.flags(FOLLOWS_ALL);
	std::string background = "transparent.j2c";
	bparams.image_unselected.name(background);
	bparams.image_disabled.name(background);
	bparams.image_selected.name(background);
	bparams.image_hover_selected.name(background);
	bparams.image_disabled_selected.name(background);
	bparams.image_hover_unselected.name(background);
	bparams.image_overlay.name(icon);

	mArrowBtn = LLUICtrlFactory::create<LLButton>(bparams);
	addChild(mArrowBtn);
}

/*virtual*/
void LLMenuScrollItem::draw()
{
	LLUICtrl::draw();
}

/*virtual*/
void LLMenuScrollItem::reshape(S32 width, S32 height, BOOL called_from_parent)
{
	mArrowBtn->reshape(width, height, called_from_parent);
	LLView::reshape(width, height, called_from_parent);
}

/*virtual*/
void LLMenuScrollItem::setEnabled(BOOL enabled)
{
	mArrowBtn->setEnabled(enabled);
	LLView::setEnabled(enabled);
}

void LLMenuScrollItem::onCommit( void )
{
	LLUICtrl::onCommit();
}

///============================================================================
/// Class LLMenuGL
///============================================================================

LLMenuGL::LLMenuGL(const LLMenuGL::Params& p)
:	LLUICtrl(p),
	mBackgroundColor( p.bg_color() ),
	mBgVisible( p.bg_visible ),
	mDropShadowed( p.drop_shadow ),
	mHorizontalLayout( p.horizontal_layout ),
	mScrollable(mHorizontalLayout ? FALSE : p.scrollable), // Scrolling is supported only for vertical layout
	mMaxScrollableItems(p.max_scrollable_items),
	mPreferredWidth(p.preferred_width),
	mKeepFixedSize( p.keep_fixed_size ),
	mLabel (p.label),
	mLastMouseX(0),
	mLastMouseY(0),
	mMouseVelX(0),
	mMouseVelY(0),
	mTornOff(FALSE),
	mTearOffItem(NULL),
	mSpilloverBranch(NULL),
	mFirstVisibleItem(NULL),
	mArrowUpItem(NULL),
	mArrowDownItem(NULL),
	mSpilloverMenu(NULL),
	mJumpKey(p.jump_key),
	mCreateJumpKeys(p.create_jump_keys),
	mParentFloaterHandle(p.parent_floater),
	mNeedsArrange(FALSE), 
	mShortcutPad(p.shortcut_pad)
{
	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
	boost::char_separator<char> sep("_");
	tokenizer tokens(p.label(), sep);
	tokenizer::iterator token_iter;

	S32 token_count = 0;
	std::string new_menu_label;
	for( token_iter = tokens.begin(); token_iter != tokens.end(); ++token_iter)
	{
		new_menu_label += (*token_iter);
		if (token_count > 0)
		{
			setJumpKey((*token_iter).c_str()[0]);
		}
		++token_count;
	}
	setLabel(new_menu_label);

	mFadeTimer.stop();
}

void LLMenuGL::initFromParams(const LLMenuGL::Params& p)
{
	LLUICtrl::initFromParams(p);
	setCanTearOff(p.can_tear_off, p.parent_floater);
}

// Destroys the object
LLMenuGL::~LLMenuGL( void )
{
	// delete the branch, as it might not be in view hierarchy
	// leave the menu, because it is always in view hierarchy
	delete mSpilloverBranch;
	mJumpKeys.clear();
}

void LLMenuGL::setCanTearOff(BOOL tear_off, LLHandle<LLFloater> parent_floater_handle )
{
	if (tear_off && mTearOffItem == NULL)
	{
		LLMenuItemTearOffGL::Params p;
		p.parent_floater_handle = parent_floater_handle;
		mTearOffItem = LLUICtrlFactory::create<LLMenuItemTearOffGL>(p);
		addChildInBack(mTearOffItem);
	}
	else if (!tear_off && mTearOffItem != NULL)
	{
		mItems.remove(mTearOffItem);
		removeChild(mTearOffItem);
		delete mTearOffItem;
		mTearOffItem = NULL;
		needsArrange();
	}
}

bool LLMenuGL::addChild(LLView* view, S32 tab_group)
{
	if (LLMenuGL* menup = dynamic_cast<LLMenuGL*>(view))
	{
		appendMenu(menup);
		return true;
	}
	else if (LLMenuItemGL* itemp = dynamic_cast<LLMenuItemGL*>(view))
	{
		append(itemp);
		return true;
	}
	return false;
}

void LLMenuGL::removeChild( LLView* ctrl)
{
	// previously a dynamic_cast with if statement to check validity
	// unfortunately removeChild is called by ~LLView, and at that point the
	// object being deleted is no longer a LLMenuItemGL so a dynamic_cast will fail
	LLMenuItemGL* itemp = static_cast<LLMenuItemGL*>(ctrl);

	item_list_t::iterator found_it = std::find(mItems.begin(), mItems.end(), (itemp));
	if (found_it != mItems.end())
	{
		mItems.erase(found_it);
	}

	return LLUICtrl::removeChild(ctrl);
}

BOOL LLMenuGL::postBuild()
{
	createJumpKeys();
	return LLUICtrl::postBuild();
}

// are we the childmost active menu and hence our jump keys should be enabled?
// or are we a free-standing torn-off menu (which uses jump keys too)
BOOL LLMenuGL::jumpKeysActive()
{
	LLMenuItemGL* highlighted_item = getHighlightedItem();
	BOOL active = getVisible() && getEnabled();
	if (getTornOff())
	{
		// activation of jump keys on torn off menus controlled by keyboard focus
		active = active && ((LLFloater*)getParent())->hasFocus();

	}
	else
	{
		// Are we the terminal active menu?
		// Yes, if parent menu item deems us to be active (just being visible is sufficient for top-level menus)
		// and we don't have a highlighted menu item pointing to an active sub-menu
		active = active && (!getParentMenuItem() || getParentMenuItem()->isActive()) // I have a parent that is active...
		                && (!highlighted_item || !highlighted_item->isActive()); //... but no child that is active
	}
	return active;
}

BOOL LLMenuGL::isOpen()
{
	if (getTornOff())
	{
		LLMenuItemGL* itemp = getHighlightedItem();
		// if we have an open sub-menu, then we are considered part of 
		// the open menu chain even if we don't have focus
		if (itemp && itemp->isOpen())
		{
			return TRUE;
		}
		// otherwise we are only active if we have keyboard focus
		return ((LLFloater*)getParent())->hasFocus();
	}
	else
	{
		// normally, menus are hidden as soon as the user focuses
		// on another menu, so just use the visibility criterion
		return getVisible();
	}
}

void LLMenuGL::scrollItemsUp()
{
	// Slowing down the items scrolling when arrow button is held 
	if (mScrollItemsTimer.hasExpired() && NULL != mFirstVisibleItem)
	{
		mScrollItemsTimer.setTimerExpirySec(.033f);
	}
	else
	{
		return;
	}

	item_list_t::iterator cur_item_iter;
	item_list_t::iterator prev_item_iter;
	for (cur_item_iter = mItems.begin(), prev_item_iter = mItems.begin(); cur_item_iter != mItems.end(); cur_item_iter++)
	{
		if( (*cur_item_iter) == mFirstVisibleItem)
		{
			break;
		}
		if ((*cur_item_iter)->getVisible())
		{
			prev_item_iter = cur_item_iter;
		}
	}

	if ((*prev_item_iter)->getVisible())
	{
		mFirstVisibleItem = *prev_item_iter;
	}
	
	mNeedsArrange = TRUE;
	arrangeAndClear();
}

void LLMenuGL::scrollItemsDown()
{
	// Slowing down the items scrolling when arrow button is held 
	if (mScrollItemsTimer.hasExpired())
	{
		mScrollItemsTimer.setTimerExpirySec(.033f);
	}
	else
	{
		return;
	}
	
	if (NULL == mFirstVisibleItem)
	{
		mFirstVisibleItem = *mItems.begin();
	}

	item_list_t::iterator cur_item_iter;
	
	for (cur_item_iter = mItems.begin(); cur_item_iter != mItems.end(); cur_item_iter++)
	{
		if( (*cur_item_iter) == mFirstVisibleItem)
		{
			break;
		}
	}

	item_list_t::iterator next_item_iter;

	for (next_item_iter = ++cur_item_iter; next_item_iter != mItems.end(); next_item_iter++)
	{
		if( (*next_item_iter)->getVisible())
		{
			break;
		}
	}

	if ((*next_item_iter)->getVisible())
	{
		mFirstVisibleItem = *next_item_iter;
	}
	
	mNeedsArrange = TRUE;
	arrangeAndClear();
}

// rearrange the child rects so they fit the shape of the menu.
void LLMenuGL::arrange( void )
{
	// calculate the height & width, and set our rect based on that
	// information.
	const LLRect& initial_rect = getRect();

	U32 width = 0, height = MENU_ITEM_PADDING;

	cleanupSpilloverBranch();

	if( mItems.size() ) 
	{
		const LLRect menu_region_rect = LLMenuGL::sMenuContainer ? LLMenuGL::sMenuContainer->getMenuRect() : LLRect(0, S32_MAX, S32_MAX, 0);

		// torn off menus are not constrained to the size of the screen
		U32 max_width = getTornOff() ? U32_MAX : menu_region_rect.getWidth();
		U32 max_height = U32_MAX;
		if (!getTornOff())
		{
			max_height = getRect().mTop - menu_region_rect.mBottom;
			if (menu_region_rect.mTop - getRect().mTop > (S32)max_height)
			{
				max_height = menu_region_rect.mTop - getRect().mTop;
			}
		}

		// *FIX: create the item first and then ask for its dimensions?
		S32 spillover_item_width = PLAIN_PAD_PIXELS + LLFontGL::getFontSansSerif()->getWidth( std::string("More") ); // *TODO: Translate
		S32 spillover_item_height = llround(LLFontGL::getFontSansSerif()->getLineHeight()) + MENU_ITEM_PADDING;

		// Scrolling support
		item_list_t::iterator first_visible_item_iter;
		item_list_t::iterator first_hidden_item_iter = mItems.end();
		S32 height_before_first_visible_item = -1;
		S32 visible_items_height = 0;
		U32 scrollable_items_cnt = 0;
		
		if (mHorizontalLayout)
		{
			item_list_t::iterator item_iter;
			for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
			{
				if ((*item_iter)->getVisible())
				{
					if (!getTornOff() 
						&& *item_iter != mSpilloverBranch
						&& width + (*item_iter)->getNominalWidth() > max_width - spillover_item_width)
					{
						// no room for any more items
						createSpilloverBranch();

						std::vector<LLMenuItemGL*> items_to_remove;
						std::copy(item_iter, mItems.end(), std::back_inserter(items_to_remove));
						std::vector<LLMenuItemGL*>::iterator spillover_iter;
						for (spillover_iter= items_to_remove.begin(); spillover_iter != items_to_remove.end(); ++spillover_iter)
						{
							LLMenuItemGL* itemp = (*spillover_iter);
							removeChild(itemp);
							mSpilloverMenu->addChild(itemp);
						}

						addChild(mSpilloverBranch);
						
						height = llmax(height, mSpilloverBranch->getNominalHeight());
						width += mSpilloverBranch->getNominalWidth();

						break;
					}
					else
					{
						// track our rect
						height = llmax(height, (*item_iter)->getNominalHeight());
						width += (*item_iter)->getNominalWidth();
					}
				}
			}
		}
		else
		{
			item_list_t::iterator item_iter;

			for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
			{
				if ((*item_iter)->getVisible())
				{
					if (!getTornOff() 
						&& !mScrollable
						&& *item_iter != mSpilloverBranch
						&& height + (*item_iter)->getNominalHeight() > max_height - spillover_item_height)
					{
						// no room for any more items
						createSpilloverBranch();

						std::vector<LLMenuItemGL*> items_to_remove;
						std::copy(item_iter, mItems.end(), std::back_inserter(items_to_remove));
						std::vector<LLMenuItemGL*>::iterator spillover_iter;
						for (spillover_iter= items_to_remove.begin(); spillover_iter != items_to_remove.end(); ++spillover_iter)
						{
							LLMenuItemGL* itemp = (*spillover_iter);
							removeChild(itemp);
							mSpilloverMenu->addChild(itemp);
						}


						addChild(mSpilloverBranch);

						height += mSpilloverBranch->getNominalHeight();
						width = llmax( width, mSpilloverBranch->getNominalWidth() );

						break;
					}
					else
					{
						// track our rect
						height += (*item_iter)->getNominalHeight();
						width = llmax( width, (*item_iter)->getNominalWidth() );
					}

					if (mScrollable)
					{
						// Determining visible items boundaries
						if (NULL == mFirstVisibleItem)
						{
							mFirstVisibleItem = *item_iter;
						}

						if (*item_iter == mFirstVisibleItem)
						{
							height_before_first_visible_item = height - (*item_iter)->getNominalHeight();
							first_visible_item_iter = item_iter;
							scrollable_items_cnt = 0;
						}

						if (-1 != height_before_first_visible_item && 0 == visible_items_height &&
						    (++scrollable_items_cnt > mMaxScrollableItems ||
						     height - height_before_first_visible_item > max_height - spillover_item_height * 2 ))
						{
							first_hidden_item_iter = item_iter;
							visible_items_height = height - height_before_first_visible_item - (*item_iter)->getNominalHeight();
							scrollable_items_cnt--;
						}
					}
				}
			}

			if (mPreferredWidth < U32_MAX)
				width = llmin(mPreferredWidth, max_width);
			
			if (mScrollable)
			{
				S32 max_items_height = max_height - spillover_item_height * 2;

				if (visible_items_height == 0)
					visible_items_height = height - height_before_first_visible_item;

				// Fix mFirstVisibleItem value, if it doesn't allow to display all items, that can fit
				if (visible_items_height < max_items_height && scrollable_items_cnt < mMaxScrollableItems)
				{
					item_list_t::iterator tmp_iter(first_visible_item_iter);
					while (visible_items_height < max_items_height &&
					       scrollable_items_cnt < mMaxScrollableItems &&
					       first_visible_item_iter != mItems.begin())
					{
						if ((*first_visible_item_iter)->getVisible())
						{
							// It keeps visible item, after first_visible_item_iter
							tmp_iter = first_visible_item_iter;
						}

						first_visible_item_iter--;

						if ((*first_visible_item_iter)->getVisible())
						{
							visible_items_height += (*first_visible_item_iter)->getNominalHeight();
							height_before_first_visible_item -= (*first_visible_item_iter)->getNominalHeight();
							scrollable_items_cnt++;
						}
					}

					// Roll back one item, that doesn't fit
					if (visible_items_height > max_items_height)
					{
						visible_items_height -= (*first_visible_item_iter)->getNominalHeight();
						height_before_first_visible_item += (*first_visible_item_iter)->getNominalHeight();
						scrollable_items_cnt--;
						first_visible_item_iter = tmp_iter;
					}
					if (!(*first_visible_item_iter)->getVisible())
					{
						first_visible_item_iter = tmp_iter;
					}

					mFirstVisibleItem = *first_visible_item_iter;
				}
			}
		}

		S32 cur_height = (S32)llmin(max_height, height);

		if (mScrollable &&
		    (height_before_first_visible_item > MENU_ITEM_PADDING ||
			    height_before_first_visible_item + visible_items_height < (S32)height))
		{
			// Reserving 2 extra slots for arrow items
			cur_height = visible_items_height + spillover_item_height * 2;
		}

		setRect(LLRect(getRect().mLeft, getRect().mTop, getRect().mLeft + width, getRect().mTop - cur_height));

		S32 cur_width = 0;
		S32 offset = 0;
		if (mScrollable)
		{
			// No space for all items, creating arrow items
			if (height_before_first_visible_item > MENU_ITEM_PADDING ||
			    height_before_first_visible_item + visible_items_height < (S32)height)
			{
				if (NULL == mArrowUpItem)
				{
					LLMenuScrollItem::Params item_params;
					item_params.name(ARROW_UP);
					item_params.arrow_type(LLMenuScrollItem::ARROW_UP);
					item_params.scroll_callback.function(boost::bind(&LLMenuGL::scrollItemsUp, this));

					mArrowUpItem = LLUICtrlFactory::create<LLMenuScrollItem>(item_params);
					LLUICtrl::addChild(mArrowUpItem);

				}
				if (NULL == mArrowDownItem)
				{
					LLMenuScrollItem::Params item_params;
					item_params.name(ARROW_DOWN);
					item_params.arrow_type(LLMenuScrollItem::ARROW_DOWN);
					item_params.scroll_callback.function(boost::bind(&LLMenuGL::scrollItemsDown, this));

					mArrowDownItem = LLUICtrlFactory::create<LLMenuScrollItem>(item_params);
					LLUICtrl::addChild(mArrowDownItem);				
				}

				LLRect rect;
				mArrowUpItem->setRect(rect.setLeftTopAndSize( 0, cur_height, width, mArrowUpItem->getNominalHeight()));
				mArrowUpItem->setVisible(TRUE);
				mArrowUpItem->setEnabled(height_before_first_visible_item > MENU_ITEM_PADDING);
				mArrowUpItem->reshape(width, mArrowUpItem->getNominalHeight());
				mArrowDownItem->setRect(rect.setLeftTopAndSize( 0, mArrowDownItem->getNominalHeight(), width, mArrowDownItem->getNominalHeight()));
				mArrowDownItem->setVisible(TRUE);
				mArrowDownItem->setEnabled(height_before_first_visible_item + visible_items_height < (S32)height);
				mArrowDownItem->reshape(width, mArrowDownItem->getNominalHeight());

				cur_height -= mArrowUpItem->getNominalHeight();

				offset = menu_region_rect.mRight; // This moves items behind visible area
			}
			else
			{
				if (NULL != mArrowUpItem)
				{
					mArrowUpItem->setVisible(FALSE);
				}
				if (NULL != mArrowDownItem)
				{
					mArrowDownItem->setVisible(FALSE);
				}
			}

		}

		item_list_t::iterator item_iter;
		for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
		{
			if ((*item_iter)->getVisible())
			{
				if (mScrollable)
				{
					if (item_iter == first_visible_item_iter)
					{
						offset = 0;
					}
					else if (item_iter == first_hidden_item_iter)
					{
						offset = menu_region_rect.mRight;  // This moves items behind visible area
					}
				}

				// setup item rect to hold label
				LLRect rect;
				if (mHorizontalLayout)
				{
					rect.setLeftTopAndSize( cur_width, height, (*item_iter)->getNominalWidth(), height);
					cur_width += (*item_iter)->getNominalWidth();
				}
				else
				{
					rect.setLeftTopAndSize( 0 + offset, cur_height, width, (*item_iter)->getNominalHeight());
					if (offset == 0)
					{
						cur_height -= (*item_iter)->getNominalHeight();
					}
				}
				(*item_iter)->setRect( rect );
				(*item_iter)->buildDrawLabel();
			}
		}
	}
	if (mKeepFixedSize)
	{
		reshape(initial_rect.getWidth(), initial_rect.getHeight());
	}
}

void LLMenuGL::arrangeAndClear( void )
{
	if (mNeedsArrange)
	{
		arrange();
		mNeedsArrange = FALSE;
	}
}

void LLMenuGL::createSpilloverBranch()
{
	if (!mSpilloverBranch)
	{
		// should be NULL but delete anyway
		delete mSpilloverMenu;
		// technically, you can't tear off spillover menus, but we're passing the handle
		// along just to be safe
		LLMenuGL::Params p;
		p.name("More");
		p.label("More"); // *TODO: Translate
		p.parent_floater(mParentFloaterHandle);
		p.bg_color(mBackgroundColor);
		p.bg_visible(true);
		p.can_tear_off(false);
		mSpilloverMenu = new LLMenuGL(p);
		mSpilloverMenu->updateParent(LLMenuGL::sMenuContainer);

		LLMenuItemBranchGL::Params branch_params;
		branch_params.name = "More";
		branch_params.label = "More"; // *TODO: Translate
		branch_params.branch = mSpilloverMenu;
		branch_params.font.style = "italic";


		mSpilloverBranch = LLUICtrlFactory::create<LLMenuItemBranchGL>(branch_params);
	}
}

void LLMenuGL::cleanupSpilloverBranch()
{
	if (mSpilloverBranch && mSpilloverBranch->getParent() == this)
	{
		// head-recursion to propagate items back up to root menu
		mSpilloverMenu->cleanupSpilloverBranch();

		// pop off spillover items
		while (mSpilloverMenu->getItemCount())
		{
			LLMenuItemGL* itemp = mSpilloverMenu->getItem(0);
			mSpilloverMenu->removeChild(itemp);
			// put them at the end of our own list
			addChild(itemp);
		}
		
		// Delete the branch, and since the branch will delete the menu,
		// set the menu* to null.
		delete mSpilloverBranch;
		mSpilloverBranch = NULL;
		mSpilloverMenu = NULL;
	}
}

void LLMenuGL::createJumpKeys()
{
	if (!mCreateJumpKeys) return;
	mCreateJumpKeys = FALSE;

	mJumpKeys.clear();

	std::set<std::string> unique_words;
	std::set<std::string> shared_words;

	item_list_t::iterator item_it;
	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
	boost::char_separator<char> sep(" ");

	for(item_it = mItems.begin(); item_it != mItems.end(); ++item_it)
	{
		std::string uppercase_label = (*item_it)->getLabel();
		LLStringUtil::toUpper(uppercase_label);

		tokenizer tokens(uppercase_label, sep);
		tokenizer::iterator token_iter;
		for( token_iter = tokens.begin(); token_iter != tokens.end(); ++token_iter)
		{
			if (unique_words.find(*token_iter) != unique_words.end())
			{
				// this word exists in more than one menu instance
				shared_words.insert(*token_iter);
			}
			else
			{
				// we have a new word, keep track of it
				unique_words.insert(*token_iter);
			}
		}
	}

	// pre-assign specified jump keys
	for(item_it = mItems.begin(); item_it != mItems.end(); ++item_it)
	{
		KEY jump_key = (*item_it)->getJumpKey();
		if(jump_key != KEY_NONE)
		{
			if (mJumpKeys.find(jump_key) == mJumpKeys.end())
			{
				mJumpKeys.insert(std::pair<KEY, LLMenuItemGL*>(jump_key, (*item_it)));
			}
			else
			{
				// this key is already spoken for, 
				// so we need to reassign it below
				(*item_it)->setJumpKey(KEY_NONE);
			}
		}
	}

	for(item_it = mItems.begin(); item_it != mItems.end(); ++item_it)
	{
		// skip over items that already have assigned jump keys
		if ((*item_it)->getJumpKey() != KEY_NONE)
		{
			continue;
		}
		std::string uppercase_label = (*item_it)->getLabel();
		LLStringUtil::toUpper(uppercase_label);

		tokenizer tokens(uppercase_label, sep);
		tokenizer::iterator token_iter;

		BOOL found_key = FALSE;
		for( token_iter = tokens.begin(); token_iter != tokens.end(); ++token_iter)
		{
			std::string uppercase_word = *token_iter;

			// this word is not shared with other menu entries...
			if (shared_words.find(*token_iter) == shared_words.end())
			{
				S32 i;
				for(i = 0; i < (S32)uppercase_word.size(); i++)
				{
					char jump_key = uppercase_word[i];
					
					if (LLStringOps::isDigit(jump_key) || LLStringOps::isUpper(jump_key) &&
						mJumpKeys.find(jump_key) == mJumpKeys.end())
					{
						mJumpKeys.insert(std::pair<KEY, LLMenuItemGL*>(jump_key, (*item_it)));
						(*item_it)->setJumpKey(jump_key);
						found_key = TRUE;
						break;
					}
				}
			}
			if (found_key)
			{
				break;
			}
		}
	}
}

// remove all items on the menu
void LLMenuGL::empty( void )
{
	cleanupSpilloverBranch();

	mItems.clear();
	mFirstVisibleItem = NULL;
	mArrowUpItem = NULL;
	mArrowDownItem = NULL;

	deleteAllChildren();
}

// Adjust rectangle of the menu
void LLMenuGL::setLeftAndBottom(S32 left, S32 bottom)
{
	setRect(LLRect(left, getRect().mTop, getRect().mRight, bottom));
	needsArrange();
}

BOOL LLMenuGL::handleJumpKey(KEY key)
{
	// must perform case-insensitive comparison, so just switch to uppercase input key
	key = toupper(key);
	navigation_key_map_t::iterator found_it = mJumpKeys.find(key);
	if(found_it != mJumpKeys.end() && found_it->second->getEnabled())
	{
		// switch to keyboard navigation mode
		LLMenuGL::setKeyboardMode(TRUE);

		// force highlight to close old menus and open and sub-menus
		found_it->second->setHighlight(TRUE);
		found_it->second->onCommit();

	}
	// if we are navigating the menus, we need to eat the keystroke
	// so rest of UI doesn't handle it
	return TRUE;
}


// Add the menu item to this menu.
BOOL LLMenuGL::append( LLMenuItemGL* item )
{
	if (!item) return FALSE;
	mItems.push_back( item );
	LLUICtrl::addChild(item);
	needsArrange();
	return TRUE;
}

// add a separator to this menu
BOOL LLMenuGL::addSeparator()
{
	LLMenuItemGL* separator = new LLMenuItemSeparatorGL();
	return addChild(separator);
}

// add a menu - this will create a cascading menu
BOOL LLMenuGL::appendMenu( LLMenuGL* menu )
{
	if( menu == this )
	{
		llerrs << "** Attempt to attach menu to itself. This is certainly "
			   << "a logic error." << llendl;
	}
	BOOL success = TRUE;

	LLMenuItemBranchGL::Params p;
	p.name = menu->getName();
	p.label = menu->getLabel();
	p.branch = menu;
	p.jump_key = menu->getJumpKey();
	p.enabled_color=LLUIColorTable::instance().getColor("MenuItemEnabledColor");
	p.disabled_color=LLUIColorTable::instance().getColor("MenuItemDisabledColor");
	p.highlight_bg_color=LLUIColorTable::instance().getColor("MenuItemHighlightBgColor");
	p.highlight_fg_color=LLUIColorTable::instance().getColor("MenuItemHighlightFgColor");

	LLMenuItemBranchGL* branch = LLUICtrlFactory::create<LLMenuItemBranchGL>(p);
	success &= append( branch );

	// Inherit colors
	menu->setBackgroundColor( mBackgroundColor );
	menu->updateParent(LLMenuGL::sMenuContainer);
	return success;
}

void LLMenuGL::setEnabledSubMenus(BOOL enable)
{
	setEnabled(enable);
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		(*item_iter)->setEnabledSubMenus( enable );
	}
}

// setItemEnabled() - pass the label and the enable flag for a menu
// item. TRUE will make sure it's enabled, FALSE will disable it.
void LLMenuGL::setItemEnabled( const std::string& name, BOOL enable )
{
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		if( (*item_iter)->getName() == name )
		{
			(*item_iter)->setEnabled( enable );
			(*item_iter)->setEnabledSubMenus( enable );
			break;
		}
	}
}

void LLMenuGL::setItemVisible( const std::string& name, BOOL visible )
{
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		if( (*item_iter)->getName() == name )
		{
			(*item_iter)->setVisible( visible );
			needsArrange();
			break;
		}
	}
}

void LLMenuGL::setItemLastSelected(LLMenuItemGL* item)
{
	if (getVisible())
	{
		LLMenuHolderGL::setActivatedItem(item);
	}

	// update enabled and checkmark status
	item->buildDrawLabel();
}

//  Set whether drop shadowed 
void LLMenuGL::setDropShadowed( const BOOL shadowed )
{
	mDropShadowed = shadowed;
}

void LLMenuGL::setTornOff(BOOL torn_off)
{ 
	mTornOff = torn_off;
}

U32 LLMenuGL::getItemCount()
{
	return mItems.size();
}

LLMenuItemGL* LLMenuGL::getItem(S32 number)
{
	if (number >= 0 && number < (S32)mItems.size())
	{
		item_list_t::iterator item_iter;
		for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
		{
			if (number == 0)
			{
				return (*item_iter);
			}
			number--;
		}
	}
	return NULL;
}

LLMenuItemGL* LLMenuGL::getHighlightedItem()
{
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		if ((*item_iter)->getHighlight())
		{
			return (*item_iter);
		}
	}
	return NULL;
}

LLMenuItemGL* LLMenuGL::highlightNextItem(LLMenuItemGL* cur_item, BOOL skip_disabled)
{
	// highlighting first item on a torn off menu is the
	// same as giving focus to it
	if (!cur_item && getTornOff())
	{
		((LLFloater*)getParent())->setFocus(TRUE);
	}

	item_list_t::iterator cur_item_iter;
	for (cur_item_iter = mItems.begin(); cur_item_iter != mItems.end(); ++cur_item_iter)
	{
		if( (*cur_item_iter) == cur_item)
		{
			break;
		}
	}

	item_list_t::iterator next_item_iter;
	if (cur_item_iter == mItems.end())
	{
		next_item_iter = mItems.begin();
	}
	else
	{
		next_item_iter = cur_item_iter;
		next_item_iter++;
		if (next_item_iter == mItems.end())
		{
			next_item_iter = mItems.begin();
		}
	}

	// when first highlighting a menu, skip over tear off menu item
	if (mTearOffItem && !cur_item)
	{
		// we know the first item is the tear off menu item
		cur_item_iter = mItems.begin();
		next_item_iter++;
		if (next_item_iter == mItems.end())
		{
			next_item_iter = mItems.begin();
		}
	}

	while(1)
	{
		// skip separators and disabled/invisible items
		if ((*next_item_iter)->getEnabled() && (*next_item_iter)->getVisible() && !dynamic_cast<LLMenuItemSeparatorGL*>(*next_item_iter))
		{
			if (cur_item)
			{
				cur_item->setHighlight(FALSE);
			}
			(*next_item_iter)->setHighlight(TRUE);
			return (*next_item_iter);
		}


		if (!skip_disabled || next_item_iter == cur_item_iter)
		{
			break;
		}

		next_item_iter++;
		if (next_item_iter == mItems.end())
		{
			if (cur_item_iter == mItems.end())
			{
				break;
			}
			next_item_iter = mItems.begin();
		}
	}

	return NULL;
}

LLMenuItemGL* LLMenuGL::highlightPrevItem(LLMenuItemGL* cur_item, BOOL skip_disabled)
{
	// highlighting first item on a torn off menu is the
	// same as giving focus to it
	if (!cur_item && getTornOff())
	{
		((LLFloater*)getParent())->setFocus(TRUE);
	}

	item_list_t::reverse_iterator cur_item_iter;
	for (cur_item_iter = mItems.rbegin(); cur_item_iter != mItems.rend(); ++cur_item_iter)
	{
		if( (*cur_item_iter) == cur_item)
		{
			break;
		}
	}

	item_list_t::reverse_iterator prev_item_iter;
	if (cur_item_iter == mItems.rend())
	{
		prev_item_iter = mItems.rbegin();
	}
	else
	{
		prev_item_iter = cur_item_iter;
		prev_item_iter++;
		if (prev_item_iter == mItems.rend())
		{
			prev_item_iter = mItems.rbegin();
		}
	}

	while(1)
	{
		// skip separators and disabled/invisible items
		if ((*prev_item_iter)->getEnabled() && (*prev_item_iter)->getVisible() && (*prev_item_iter)->getName() != SEPARATOR_NAME)
		{
			(*prev_item_iter)->setHighlight(TRUE);
			return (*prev_item_iter);
		}

		if (!skip_disabled || prev_item_iter == cur_item_iter)
		{
			break;
		}

		prev_item_iter++;
		if (prev_item_iter == mItems.rend())
		{
			if (cur_item_iter == mItems.rend())
			{
				break;
			}

			prev_item_iter = mItems.rbegin();
		}
	}

	return NULL;
}

void LLMenuGL::buildDrawLabels()
{
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		(*item_iter)->buildDrawLabel();
	}
}

void LLMenuGL::updateParent(LLView* parentp)
{
	if (getParent())
	{
		getParent()->removeChild(this);
	}
	if (parentp)
	{
		parentp->addChild(this);
	}
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		(*item_iter)->updateBranchParent(parentp);
	}
}

BOOL LLMenuGL::handleAcceleratorKey(KEY key, MASK mask)
{
	// don't handle if not enabled
	if(!getEnabled())
	{
		return FALSE;
	}

	// Pass down even if not visible
	item_list_t::iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		LLMenuItemGL* itemp = *item_iter;
		if (itemp->handleAcceleratorKey(key, mask))
		{
			return TRUE;
		}
	}

	return FALSE;
}

BOOL LLMenuGL::handleUnicodeCharHere( llwchar uni_char )
{
	if (jumpKeysActive())
	{
		return handleJumpKey((KEY)uni_char);
	}
	return FALSE;
}

BOOL LLMenuGL::handleHover( S32 x, S32 y, MASK mask )
{
	// leave submenu in place if slope of mouse < MAX_MOUSE_SLOPE_SUB_MENU
	BOOL no_mouse_data = mLastMouseX == 0 && mLastMouseY == 0;
	S32 mouse_delta_x = no_mouse_data ? 0 : x - mLastMouseX;
	S32 mouse_delta_y = no_mouse_data ? 0 : y - mLastMouseY;
	LLVector2 mouse_dir((F32)mouse_delta_x, (F32)mouse_delta_y);
	mouse_dir.normVec();
	LLVector2 mouse_avg_dir((F32)mMouseVelX, (F32)mMouseVelY);
	mouse_avg_dir.normVec();
	F32 interp = 0.5f * (llclamp(mouse_dir * mouse_avg_dir, 0.f, 1.f));
	mMouseVelX = llround(lerp((F32)mouse_delta_x, (F32)mMouseVelX, interp));
	mMouseVelY = llround(lerp((F32)mouse_delta_y, (F32)mMouseVelY, interp));
	mLastMouseX = x;
	mLastMouseY = y;

	// don't change menu focus unless mouse is moving or alt key is not held down
	if ((llabs(mMouseVelX) > 0 || 
			llabs(mMouseVelY) > 0) &&
		(!mHasSelection ||
		//(mouse_delta_x == 0 && mouse_delta_y == 0) ||
		(mMouseVelX < 0) ||
		llabs((F32)mMouseVelY) / llabs((F32)mMouseVelX) > MAX_MOUSE_SLOPE_SUB_MENU))
	{
		for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
		{
			LLView* viewp = *child_it;
			S32 local_x = x - viewp->getRect().mLeft;
			S32 local_y = y - viewp->getRect().mBottom;
			if (!viewp->pointInView(local_x, local_y) && ((LLMenuItemGL*)viewp)->getHighlight())
			{
				// moving mouse always highlights new item
				if (mouse_delta_x != 0 || mouse_delta_y != 0)
				{
					((LLMenuItemGL*)viewp)->setHighlight(FALSE);
				}
			}
		}

		for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
		{
			LLView* viewp = *child_it;
			S32 local_x = x - viewp->getRect().mLeft;
			S32 local_y = y - viewp->getRect().mBottom;
			//RN: always call handleHover to track mGotHover status
			// but only set highlight when mouse is moving
			if( viewp->getVisible() && 
				//RN: allow disabled items to be highlighted to preserve "active" menus when
				// moving mouse through them
				//viewp->getEnabled() && 
				viewp->pointInView(local_x, local_y) && 
				viewp->handleHover(local_x, local_y, mask))
			{
				// moving mouse always highlights new item
				if (mouse_delta_x != 0 || mouse_delta_y != 0)
				{
					((LLMenuItemGL*)viewp)->setHighlight(TRUE);
					LLMenuGL::setKeyboardMode(FALSE);
				}
				mHasSelection = TRUE;
			}
		}
	}
	getWindow()->setCursor(UI_CURSOR_ARROW);

	// *HACK Release the mouse capture
	// This is done to release the mouse after the Navigation Bar "Back" or "Forward" button
	// drop-down menu is shown. Otherwise any other view won't be able to handle mouse events
	// until the user chooses one of the drop-down menu items.

	return TRUE;
}

BOOL LLMenuGL::handleScrollWheel( S32 x, S32 y, S32 clicks )
{
	if (!mScrollable)
		return blockMouseEvent(x, y);

	if( clicks > 0 )
	{
		while( clicks-- )
			scrollItemsDown();
	}
	else
	{
		while( clicks++ )
			scrollItemsUp();
	}

	return TRUE;
}

void LLMenuGL::draw( void )
{
	if (mNeedsArrange)
	{
		arrange();
		mNeedsArrange = FALSE;
	}
	if (mDropShadowed && !mTornOff)
	{
		static LLUICachedControl<S32> drop_shadow_floater ("DropShadowFloater", 0);
		static LLUIColor color_drop_shadow = LLUIColorTable::instance().getColor("ColorDropShadow");
		gl_drop_shadow(0, getRect().getHeight(), getRect().getWidth(), 0, 
			color_drop_shadow, drop_shadow_floater );
	}

	if( mBgVisible )
	{
		gl_rect_2d( 0, getRect().getHeight(), getRect().getWidth(), 0, mBackgroundColor.get() );
	}
	LLView::draw();
}

void LLMenuGL::drawBackground(LLMenuItemGL* itemp, F32 alpha)
{
	LLColor4 color = itemp->getHighlightBgColor() % alpha;
	gGL.color4fv( color.mV );
	LLRect item_rect = itemp->getRect();
	gl_rect_2d( 0, item_rect.getHeight(), item_rect.getWidth(), 0);
}

void LLMenuGL::setVisible(BOOL visible)
{
	if (visible != getVisible())
	{
		if (!visible)
		{
			mFadeTimer.start();
			clearHoverItem();
			// reset last known mouse coordinates so
			// we don't spoof a mouse move next time we're opened
			mLastMouseX = 0;
			mLastMouseY = 0;
		}
		else
		{
			mHasSelection = FALSE;
			mFadeTimer.stop();
		}

		LLView::setVisible(visible);
	}
}

LLMenuGL* LLMenuGL::findChildMenuByName(const std::string& name, BOOL recurse) const
{
	LLView* view = findChildView(name, recurse);
	if (view)
	{
		LLMenuItemBranchGL* branch = dynamic_cast<LLMenuItemBranchGL*>(view);
		if (branch)
		{
			return branch->getBranch();
		}

		LLMenuGL* menup = dynamic_cast<LLMenuGL*>(view);
		if (menup)
		{
			return menup;
		}
	}
	llwarns << "Child Menu " << name << " not found in menu " << getName() << llendl;
	return NULL;
}

BOOL LLMenuGL::clearHoverItem()
{
	for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
	{
		LLMenuItemGL* itemp = (LLMenuItemGL*)*child_it;
		if (itemp->getHighlight())
		{
			itemp->setHighlight(FALSE);
			return TRUE;
		}
	}		
	return FALSE;
}

void hide_top_view( LLView* view )
{
	if( view ) view->setVisible( FALSE );
}


// x and y are the desired location for the popup, NOT necessarily the
// mouse location
// static
void LLMenuGL::showPopup(LLView* spawning_view, LLMenuGL* menu, S32 x, S32 y)
{
	// Save click point for detecting cursor moves before mouse-up.
	// Must be in local coords to compare with mouseUp events.
	// If the mouse doesn't move, the menu will stay open ala the Mac.
	// See also LLContextMenu::show()
	S32 mouse_x, mouse_y;
	LLUI::getCursorPositionLocal(menu->getParent(), &mouse_x, &mouse_y);
	LLMenuHolderGL::sContextMenuSpawnPos.set(mouse_x,mouse_y);

	const LLRect menu_region_rect = LLMenuGL::sMenuContainer->getMenuRect();

	const S32 HPAD = 2;
	LLRect rect = menu->getRect();
	//LLView* cur_view = spawning_view;
	S32 left = x + HPAD;
	S32 top = y;
	spawning_view->localPointToOtherView(left, top, &left, &top, menu->getParent());
	rect.setLeftTopAndSize( left, top,
							rect.getWidth(), rect.getHeight() );
	menu->setRect( rect );

	// Resetting scrolling position
	if (menu->isScrollable())
	{
		menu->mFirstVisibleItem = NULL;
		menu->needsArrange();
	}
	menu->arrangeAndClear(); // Fix menu rect if needed.
	rect = menu->getRect();

	// Adjust context menu to fit onscreen
	S32 bottom;
	left = rect.mLeft;
	bottom = rect.mBottom;
	S32 delta_x = 0;
	S32 delta_y = 0;
	if( bottom < menu_region_rect.mBottom )
	{
		// At this point, we need to move the context menu to the
		// other side of the mouse.
		delta_y = (rect.getHeight() + 2 * HPAD);
	}

	if( left > menu_region_rect.mRight - rect.getWidth() )
	{
		// At this point, we need to move the context menu to the
		// other side of the mouse.
		delta_x = -(rect.getWidth() + 2 * HPAD);
	}
	menu->translate( delta_x, delta_y );
	menu->setVisible( TRUE );
	menu->getParent()->sendChildToFront(menu);
}

///============================================================================
/// Class LLMenuBarGL
///============================================================================

static LLDefaultChildRegistry::Register<LLMenuBarGL> r2("menu_bar");

LLMenuBarGL::LLMenuBarGL( const Params& p )
:	LLMenuGL(p),
	mAltKeyTrigger(FALSE)
{}

// Default destructor
LLMenuBarGL::~LLMenuBarGL()
{
	std::for_each(mAccelerators.begin(), mAccelerators.end(), DeletePointer());
	mAccelerators.clear();
}

BOOL LLMenuBarGL::handleAcceleratorKey(KEY key, MASK mask)
{
	if (getHighlightedItem() && mask == MASK_NONE)
	{
		// unmodified key accelerators are ignored when navigating menu
		// (but are used as jump keys so will still work when appropriate menu is up)
		return FALSE;
	}
	BOOL result = LLMenuGL::handleAcceleratorKey(key, mask);
	if (result && mask & MASK_ALT)
	{
		// ALT key used to trigger hotkey, don't use as shortcut to open menu
		mAltKeyTrigger = FALSE;
	}

	if(!result && (key == KEY_F10 && mask == MASK_CONTROL) && !gKeyboard->getKeyRepeated(key))
	{
		if (getHighlightedItem())
		{
			clearHoverItem();
		}
		else
		{
			// close menus originating from other menu bars when first opening menu via keyboard
			LLMenuGL::sMenuContainer->hideMenus();
			highlightNextItem(NULL);
			LLMenuGL::setKeyboardMode(TRUE);
		}
		return TRUE;
	}

	return result;
}

BOOL LLMenuBarGL::handleKeyHere(KEY key, MASK mask)
{
	static LLUICachedControl<bool> use_altkey_for_menus ("UseAltKeyForMenus", 0);
	if(key == KEY_ALT && !gKeyboard->getKeyRepeated(key) && use_altkey_for_menus)
	{
		mAltKeyTrigger = TRUE;
	}
	else // if any key other than ALT hit, clear out waiting for Alt key mode
	{
		mAltKeyTrigger = FALSE;
	}
	
	if (key == KEY_ESCAPE && mask == MASK_NONE)
	{
		LLMenuGL::setKeyboardMode(FALSE);
		// if any menus are visible, this will return TRUE, stopping further processing of ESCAPE key
		return LLMenuGL::sMenuContainer->hideMenus();
	}

	// before processing any other key, check to see if ALT key has triggered menu access
	checkMenuTrigger();

	return LLMenuGL::handleKeyHere(key, mask);
}

BOOL LLMenuBarGL::handleJumpKey(KEY key)
{
	// perform case-insensitive comparison
	key = toupper(key);
	navigation_key_map_t::iterator found_it = mJumpKeys.find(key);
	if(found_it != mJumpKeys.end() && found_it->second->getEnabled())
	{
		// switch to keyboard navigation mode
		LLMenuGL::setKeyboardMode(TRUE);

		found_it->second->setHighlight(TRUE);
		found_it->second->onCommit();
	}
	return TRUE;
}

BOOL LLMenuBarGL::handleMouseDown(S32 x, S32 y, MASK mask)
{
	// clicks on menu bar closes existing menus from other contexts but leave
	// own menu open so that we get toggle behavior
	if (!getHighlightedItem() || !getHighlightedItem()->isActive())
	{
		LLMenuGL::sMenuContainer->hideMenus();
	}

	return LLMenuGL::handleMouseDown(x, y, mask);
}

void LLMenuBarGL::draw()
{
	LLMenuItemGL* itemp = getHighlightedItem();
	// If we are in mouse-control mode and the mouse cursor is not hovering over
	// the current highlighted menu item and it isn't open, then remove the
	// highlight. This is done via a polling mechanism here, as we don't receive
    // notifications when the mouse cursor moves off of us
	if (itemp && !itemp->isOpen() && !itemp->getHover() && !LLMenuGL::getKeyboardMode())
	{
		clearHoverItem();
	}

	checkMenuTrigger();

	LLMenuGL::draw();
}


void LLMenuBarGL::checkMenuTrigger()
{
	// has the ALT key been pressed and subsequently released?
	if (mAltKeyTrigger && !gKeyboard->getKeyDown(KEY_ALT))
	{
		// if alt key was released quickly, treat it as a menu access key
		// otherwise it was probably an Alt-zoom or similar action
		static LLUICachedControl<F32> menu_access_key_time ("MenuAccessKeyTime", 0);
		if (gKeyboard->getKeyElapsedTime(KEY_ALT) <= menu_access_key_time ||
			gKeyboard->getKeyElapsedFrameCount(KEY_ALT) < 2)
		{
			if (getHighlightedItem())
			{
				clearHoverItem();
			}
			else
			{
				// close menus originating from other menu bars
				LLMenuGL::sMenuContainer->hideMenus();

				highlightNextItem(NULL);
				LLMenuGL::setKeyboardMode(TRUE);
			}
		}
		mAltKeyTrigger = FALSE;
	}
}

BOOL LLMenuBarGL::jumpKeysActive()
{
	// require user to be in keyboard navigation mode to activate key triggers
	// as menu bars are always visible and it is easy to leave the mouse cursor over them
	return LLMenuGL::getKeyboardMode() && getHighlightedItem() && LLMenuGL::jumpKeysActive();
}

// rearrange the child rects so they fit the shape of the menu bar.
void LLMenuBarGL::arrange( void )
{
	U32 pos = 0;
	LLRect rect( 0, getRect().getHeight(), 0, 0 );
	item_list_t::const_iterator item_iter;
	for (item_iter = mItems.begin(); item_iter != mItems.end(); ++item_iter)
	{
		LLMenuItemGL* item = *item_iter;
		if (item->getVisible())
		{
			rect.mLeft = pos;
			pos += item->getNominalWidth();
			rect.mRight = pos;
			item->setRect( rect );
			item->buildDrawLabel();
		}
	}
	reshape(rect.mRight, rect.getHeight());
}


S32 LLMenuBarGL::getRightmostMenuEdge()
{
	// Find the last visible menu
	item_list_t::reverse_iterator item_iter;
	for (item_iter = mItems.rbegin(); item_iter != mItems.rend(); ++item_iter)
	{
		if ((*item_iter)->getVisible())
		{
			break;
		}
	}

	if (item_iter == mItems.rend())
	{
		return 0;
	}
	return (*item_iter)->getRect().mRight;
}

// add a vertical separator to this menu
BOOL LLMenuBarGL::addSeparator()
{
	LLMenuItemGL* separator = new LLMenuItemVerticalSeparatorGL();
	return append( separator );
}

// add a menu - this will create a drop down menu.
BOOL LLMenuBarGL::appendMenu( LLMenuGL* menu )
{
	if( menu == this )
	{
		llerrs << "** Attempt to attach menu to itself. This is certainly "
			   << "a logic error." << llendl;
	}

	BOOL success = TRUE;

	// *TODO: Hack! Fix this
	LLMenuItemBranchDownGL::Params p;
	p.name = menu->getName();
	p.label = menu->getLabel();
	p.visible = menu->getVisible();
	p.branch = menu;
	p.enabled_color=LLUIColorTable::instance().getColor("MenuItemEnabledColor");
	p.disabled_color=LLUIColorTable::instance().getColor("MenuItemDisabledColor");
	p.highlight_bg_color=LLUIColorTable::instance().getColor("MenuItemHighlightBgColor");
	p.highlight_fg_color=LLUIColorTable::instance().getColor("MenuItemHighlightFgColor");

	LLMenuItemBranchDownGL* branch = LLUICtrlFactory::create<LLMenuItemBranchDownGL>(p);
	success &= branch->addToAcceleratorList(&mAccelerators);
	success &= append( branch );
	branch->setJumpKey(branch->getJumpKey());
	menu->updateParent(LLMenuGL::sMenuContainer);
	
	return success;
}

BOOL LLMenuBarGL::handleHover( S32 x, S32 y, MASK mask )
{
	BOOL handled = FALSE;
	LLView* active_menu = NULL;

	BOOL no_mouse_data = mLastMouseX == 0 && mLastMouseY == 0;
	S32 mouse_delta_x = no_mouse_data ? 0 : x - mLastMouseX;
	S32 mouse_delta_y = no_mouse_data ? 0 : y - mLastMouseY;
	mMouseVelX = (mMouseVelX / 2) + (mouse_delta_x / 2);
	mMouseVelY = (mMouseVelY / 2) + (mouse_delta_y / 2);
	mLastMouseX = x;
	mLastMouseY = y;

	// if nothing currently selected or mouse has moved since last call, pick menu item via mouse
	// otherwise let keyboard control it
	if (!getHighlightedItem() || !LLMenuGL::getKeyboardMode() || llabs(mMouseVelX) > 0 || llabs(mMouseVelY) > 0)
	{
		// find current active menu
		for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
		{
			LLView* viewp = *child_it;
			if (((LLMenuItemGL*)viewp)->isOpen())
			{
				active_menu = viewp;
			}
		}

		// check for new active menu
		for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
		{
			LLView* viewp = *child_it;
			S32 local_x = x - viewp->getRect().mLeft;
			S32 local_y = y - viewp->getRect().mBottom;
			if( viewp->getVisible() && 
				viewp->getEnabled() &&
				viewp->pointInView(local_x, local_y) && 
				viewp->handleHover(local_x, local_y, mask))
			{
				((LLMenuItemGL*)viewp)->setHighlight(TRUE);
				handled = TRUE;
				if (active_menu && active_menu != viewp)
				{
					((LLMenuItemGL*)viewp)->onCommit();
					LLMenuGL::setKeyboardMode(FALSE);
				}
				LLMenuGL::setKeyboardMode(FALSE);
			}
		}

		if (handled)
		{
			// set hover false on inactive menus
			for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
			{
				LLView* viewp = *child_it;
				S32 local_x = x - viewp->getRect().mLeft;
				S32 local_y = y - viewp->getRect().mBottom;
				if (!viewp->pointInView(local_x, local_y) && ((LLMenuItemGL*)viewp)->getHighlight())
				{
					((LLMenuItemGL*)viewp)->setHighlight(FALSE);
				}
			}
		}
	}

	getWindow()->setCursor(UI_CURSOR_ARROW);
	
	return TRUE;
}

///============================================================================
/// Class LLMenuHolderGL
///============================================================================
LLCoordGL LLMenuHolderGL::sContextMenuSpawnPos(S32_MAX, S32_MAX);

LLMenuHolderGL::LLMenuHolderGL()
	: LLPanel()
{
	setName("Menu Holder");
	setMouseOpaque(FALSE);
	sItemActivationTimer.stop();
	mCanHide = TRUE;
}

void LLMenuHolderGL::draw()
{
	LLView::draw();
	// now draw last selected item as overlay
	LLMenuItemGL* selecteditem = (LLMenuItemGL*)sItemLastSelectedHandle.get();
	if (selecteditem && sItemActivationTimer.getStarted() && sItemActivationTimer.getElapsedTimeF32() < ACTIVATE_HIGHLIGHT_TIME)
	{
		// make sure toggle items, for example, show the proper state when fading out
		selecteditem->buildDrawLabel();

		LLRect item_rect;
		selecteditem->localRectToOtherView(selecteditem->getLocalRect(), &item_rect, this);

		F32 interpolant = sItemActivationTimer.getElapsedTimeF32() / ACTIVATE_HIGHLIGHT_TIME;
		
		LLUI::pushMatrix();
		{
			LLUI::translate((F32)item_rect.mLeft, (F32)item_rect.mBottom, 0.f);
			selecteditem->getMenu()->drawBackground(selecteditem, interpolant);
			selecteditem->draw();
		}
		LLUI::popMatrix();
	}
}

BOOL LLMenuHolderGL::handleMouseDown( S32 x, S32 y, MASK mask )
{
	BOOL handled = LLView::childrenHandleMouseDown(x, y, mask) != NULL;
	if (!handled)
	{
		// clicked off of menu, hide them all
		hideMenus();
	}
	return handled;
}

BOOL LLMenuHolderGL::handleRightMouseDown( S32 x, S32 y, MASK mask )
{
	BOOL handled = LLView::childrenHandleRightMouseDown(x, y, mask) != NULL;
	if (!handled)
	{
		// clicked off of menu, hide them all
		hideMenus();
	}
	return handled;
}

// This occurs when you mouse-down to spawn a context menu, hold the button 
// down, move off the menu, then mouse-up.  We want this to close the menu.
BOOL LLMenuHolderGL::handleRightMouseUp( S32 x, S32 y, MASK mask )
{
	const S32 SLOP = 2;
	S32 spawn_dx = (x - sContextMenuSpawnPos.mX);
	S32 spawn_dy = (y - sContextMenuSpawnPos.mY);
	if (-SLOP <= spawn_dx && spawn_dx <= SLOP
		&& -SLOP <= spawn_dy && spawn_dy <= SLOP)
	{
		// we're still inside the slop region from spawning this menu
		// so interpret the mouse-up as a single-click to show and leave on
		// screen
		sContextMenuSpawnPos.set(S32_MAX, S32_MAX);
		return TRUE;
	}

	BOOL handled = LLView::childrenHandleRightMouseUp(x, y, mask) != NULL;
	if (!handled)
	{
		// clicked off of menu, hide them all
		hideMenus();
	}
	return handled;
}

void LLMenuHolderGL::reshape(S32 width, S32 height, BOOL called_from_parent)
{
	if (width != getRect().getWidth() || height != getRect().getHeight())
	{
		hideMenus();
	}
	LLView::reshape(width, height, called_from_parent);
}

BOOL LLMenuHolderGL::hasVisibleMenu() const
{
	for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
	{
		LLView* viewp = *child_it;
		if (viewp->getVisible() && dynamic_cast<LLMenuBarGL*>(viewp) == NULL)
		{
			return TRUE;
		}
	}
	return FALSE;
}


BOOL LLMenuHolderGL::hideMenus()
{
	if (!mCanHide)
	{
		return FALSE;
	}
	BOOL menu_visible = hasVisibleMenu();
	if (menu_visible)
	{
		LLMenuGL::setKeyboardMode(FALSE);
		// clicked off of menu, hide them all
		for ( child_list_const_iter_t child_it = getChildList()->begin(); child_it != getChildList()->end(); ++child_it)
		{
			LLView* viewp = *child_it;
			// clicks off of menu do not hide menu bar
			if (dynamic_cast<LLMenuBarGL*>(viewp) == NULL && viewp->getVisible())
			{
				viewp->setVisible(FALSE);
			}
		}
	}
	//if (gFocusMgr.childHasKeyboardFocus(this))
	//{
	//	gFocusMgr.setKeyboardFocus(NULL);
	//}

	return menu_visible;
}

void LLMenuHolderGL::setActivatedItem(LLMenuItemGL* item)
{
	sItemLastSelectedHandle = item->getHandle();
	sItemActivationTimer.start();
}

///============================================================================
/// Class LLTearOffMenu
///============================================================================
LLTearOffMenu::LLTearOffMenu(LLMenuGL* menup) : 
	LLFloater(LLSD())
{
	static LLUICachedControl<S32> floater_header_size ("UIFloaterHeaderSize", 0);

	setName(menup->getName());
	setTitle(menup->getLabel());
	setCanMinimize(FALSE);
	// flag menu as being torn off
	menup->setTornOff(TRUE);
	// update menu layout as torn off menu (no spillover menus)
	menup->needsArrange();

	LLRect rect;
	menup->localRectToOtherView(LLRect(-1, menup->getRect().getHeight(), menup->getRect().getWidth() + 3, 0), &rect, gFloaterView);
	// make sure this floater is big enough for menu
	mTargetHeight = (F32)(rect.getHeight() + floater_header_size + 5);
	reshape(rect.getWidth(), rect.getHeight());
	setRect(rect);

	// attach menu to floater
	menup->setFollowsAll();
	mOldParent = menup->getParent();
	addChild(menup);
	menup->setVisible(TRUE);
	menup->translate(-menup->getRect().mLeft + 1, -menup->getRect().mBottom + 1);
	menup->setDropShadowed(FALSE);

	mMenu = menup;

	// highlight first item (tear off item will be disabled)
	mMenu->highlightNextItem(NULL);

	// Can't do this in postBuild() because that is only called for floaters
	// constructed from XML.
	mCloseSignal.connect(boost::bind(&LLTearOffMenu::closeTearOff, this));
}

LLTearOffMenu::~LLTearOffMenu()
{
}

void LLTearOffMenu::draw()
{
	static LLUICachedControl<S32> floater_header_size ("UIFloaterHeaderSize", 0);
	mMenu->setBackgroundVisible(isBackgroundOpaque());
	mMenu->needsArrange();

	if (getRect().getHeight() != mTargetHeight)
	{
		// animate towards target height
		reshape(getRect().getWidth(), llceil(lerp((F32)getRect().getHeight(), mTargetHeight, LLCriticalDamp::getInterpolant(0.05f))));
	}
	else
	{
		// when in stasis, remain big enough to hold menu contents
		mTargetHeight = (F32)(mMenu->getRect().getHeight() + floater_header_size + 4);
		reshape(mMenu->getRect().getWidth() + 3, mMenu->getRect().getHeight() + floater_header_size + 5);
	}
	LLFloater::draw();
}

void LLTearOffMenu::onFocusReceived()
{
	// if nothing is highlighted, just highlight first item
	if (!mMenu->getHighlightedItem())
	{
		mMenu->highlightNextItem(NULL);
	}

	// parent menu items get highlights so navigation logic keeps working
	LLMenuItemGL* parent_menu_item = mMenu->getParentMenuItem();
	while(parent_menu_item)
	{
		if (parent_menu_item->getMenu()->getVisible())
		{
			parent_menu_item->setHighlight(TRUE);
			parent_menu_item = parent_menu_item->getMenu()->getParentMenuItem();
		}
		else
		{
			break;
		}
	}
	LLFloater::onFocusReceived();
}

void LLTearOffMenu::onFocusLost()
{
	// remove highlight from parent item and our own menu
	mMenu->clearHoverItem();
	LLFloater::onFocusLost();
}

BOOL LLTearOffMenu::handleUnicodeChar(llwchar uni_char, BOOL called_from_parent)
{
	// pass keystrokes down to menu
	return mMenu->handleUnicodeChar(uni_char, TRUE);
}

BOOL LLTearOffMenu::handleKeyHere(KEY key, MASK mask)
{
	if (!mMenu->getHighlightedItem())
	{
		if (key == KEY_UP)
		{
			mMenu->highlightPrevItem(NULL);		
			return TRUE;
		}
		else if (key == KEY_DOWN)
		{
			mMenu->highlightNextItem(NULL);
			return TRUE;
		}
	}
	// pass keystrokes down to menu
	return mMenu->handleKey(key, mask, TRUE);
}

void LLTearOffMenu::translate(S32 x, S32 y)
{
	if (x != 0 && y != 0)
	{
		// hide open sub-menus by clearing current hover item
		mMenu->clearHoverItem();
	}
	LLFloater::translate(x, y);
}

//static
LLTearOffMenu* LLTearOffMenu::create(LLMenuGL* menup)
{
	LLTearOffMenu* tearoffp = new LLTearOffMenu(menup);
	// keep onscreen
	gFloaterView->adjustToFitScreen(tearoffp, FALSE);
	tearoffp->openFloater(LLSD());

	return tearoffp;
}

void LLTearOffMenu::closeTearOff()
{
	removeChild(mMenu);
	mOldParent->addChild(mMenu);
	mMenu->clearHoverItem();
	mMenu->setFollowsNone();
	mMenu->setBackgroundVisible(TRUE);
	mMenu->setVisible(FALSE);
	mMenu->setTornOff(FALSE);
	mMenu->setDropShadowed(TRUE);
}


//-----------------------------------------------------------------------------
// class LLContextMenuBranch
// A branch to another context menu
//-----------------------------------------------------------------------------
class LLContextMenuBranch : public LLMenuItemGL
{
public:
	struct Params : public LLInitParam::Block<Params, LLMenuItemGL::Params>
	{
		Mandatory<LLContextMenu*> branch;
	};

	LLContextMenuBranch(const Params&);

	// called to rebuild the draw label
	virtual void	buildDrawLabel( void );

	// onCommit() - do the primary funcationality of the menu item.
	virtual void	onCommit( void );

	LLContextMenu*	getBranch() { return mBranch; }
	void			setHighlight( BOOL highlight );

protected:
	void	showSubMenu();

	LLContextMenu* mBranch;
};

LLContextMenuBranch::LLContextMenuBranch(const LLContextMenuBranch::Params& p) 
:	LLMenuItemGL(p),
	mBranch( p.branch )
{
	mBranch->hide();
	mBranch->setParentMenuItem(this);
}

// called to rebuild the draw label
void LLContextMenuBranch::buildDrawLabel( void )
{
	{
		// default enablement is this -- if any of the subitems are
		// enabled, this item is enabled. JC
		U32 sub_count = mBranch->getItemCount();
		U32 i;
		BOOL any_enabled = FALSE;
		for (i = 0; i < sub_count; i++)
		{
			LLMenuItemGL* item = mBranch->getItem(i);
			item->buildDrawLabel();
			if (item->getEnabled() && !item->getDrawTextDisabled() )
			{
				any_enabled = TRUE;
				break;
			}
		}
		setDrawTextDisabled(!any_enabled);
		setEnabled(TRUE);
	}

	mDrawAccelLabel.clear();
	std::string st = mDrawAccelLabel;
	appendAcceleratorString( st );
	mDrawAccelLabel = st;
	
	// No special branch suffix
	mDrawBranchLabel.clear();
}

void	LLContextMenuBranch::showSubMenu()
{
	S32 center_x;
	S32 center_y;
	localPointToScreen(getRect().getWidth(), getRect().getHeight() , &center_x, &center_y);
	mBranch->show(	center_x, center_y);
}

// onCommit() - do the primary funcationality of the menu item.
void LLContextMenuBranch::onCommit( void )
{
	showSubMenu();

}
void LLContextMenuBranch::setHighlight( BOOL highlight )
{
	if (highlight == getHighlight()) return;
	LLMenuItemGL::setHighlight(highlight);
	if( highlight )
	{
		showSubMenu();
	}
	else
	{
		mBranch->hide();
	}
}


///////////////////////////////////////////////////////////////////////////////////////////////////////////
//-----------------------------------------------------------------------------
// class LLContextMenu
// A context menu
//-----------------------------------------------------------------------------
static LLDefaultChildRegistry::Register<LLContextMenu> context_menu_register("context_menu");
static MenuRegistry::Register<LLContextMenu> context_menu_register2("context_menu");


LLContextMenu::LLContextMenu(const Params& p)
:	LLMenuGL(p),
	mHoveredAnyItem(FALSE),
	mHoverItem(NULL)
{
	//setBackgroundVisible(TRUE);
}

void LLContextMenu::setVisible(BOOL visible)
{
	if (!visible)
		hide();
}

// Takes cursor position in screen space?
void LLContextMenu::show(S32 x, S32 y)
{
	// Save click point for detecting cursor moves before mouse-up.
	// Must be in local coords to compare with mouseUp events.
	// If the mouse doesn't move, the menu will stay open ala the Mac.
	// See also LLMenuGL::showPopup()
	LLMenuHolderGL::sContextMenuSpawnPos.set(x,y);

	arrangeAndClear();

	S32 width = getRect().getWidth();
	S32 height = getRect().getHeight();
	const LLRect menu_region_rect = LLMenuGL::sMenuContainer->getMenuRect();
	LLView* parent_view = getParent();

	// Open upwards if menu extends past bottom
	if (y - height < menu_region_rect.mBottom)
	{
		if (getParentMenuItem()) // Adjust if this is a submenu
		{
			y += height - getParentMenuItem()->getNominalHeight();		
		}
		else
		{
			y += height;
		}
	}

	// Open out to the left if menu extends past right edge
	if (x + width > menu_region_rect.mRight)
	{
		if (getParentMenuItem())
		{
			x -= getParentMenuItem()->getRect().getWidth() + width;
		}
		else
		{
			x -= width;
		}
	}

	S32 local_x, local_y;
	parent_view->screenPointToLocal(x, y, &local_x, &local_y);

	LLRect rect;
	rect.setLeftTopAndSize(local_x, local_y, width, height);
	setRect(rect);
	arrange();

	LLView::setVisible(TRUE);
}

void LLContextMenu::hide()
{
	if (!getVisible()) return;

	LLView::setVisible(FALSE);

	if (mHoverItem)
	{
		mHoverItem->setHighlight( FALSE );
	}
	mHoverItem = NULL;
}


BOOL LLContextMenu::handleHover( S32 x, S32 y, MASK mask )
{
	LLMenuGL::handleHover(x,y,mask);

	BOOL handled = FALSE;

	LLMenuItemGL *item = getHighlightedItem();

	if (item && item->getEnabled())
	{
		getWindow()->setCursor(UI_CURSOR_ARROW);
		handled = TRUE;

		if (item != mHoverItem)
		{
			if (mHoverItem)
			{
				mHoverItem->setHighlight( FALSE );
			}
			mHoverItem = item;
			mHoverItem->setHighlight( TRUE );
		}
		mHoveredAnyItem = TRUE;
	}
	else
	{
		// clear out our selection
		if (mHoverItem)
		{
			mHoverItem->setHighlight(FALSE);
			mHoverItem = NULL;
		}
	}

	if( !handled && pointInView( x, y ) )
	{
		getWindow()->setCursor(UI_CURSOR_ARROW);
		handled = TRUE;
	}

	return handled;
}

// handleMouseDown and handleMouseUp are handled by LLMenuGL


BOOL LLContextMenu::handleRightMouseDown(S32 x, S32 y, MASK mask)
{
	BOOL handled = FALSE;

	// The click was somewhere within our rectangle
	LLMenuItemGL *item = getHighlightedItem();

	S32 local_x = x - getRect().mLeft;
	S32 local_y = y - getRect().mBottom;

	BOOL clicked_in_menu = pointInView(local_x, local_y) ;

	// grab mouse if right clicking anywhere within pie (even deadzone in middle), to detect drag outside of pie
	if (clicked_in_menu)
	{
		// capture mouse cursor as if on initial menu show
		handled = TRUE;
	}
	
	if (item)
	{
		// lie to the item about where the click happened
		// to make sure it's within the item's rectangle
		if (item->handleMouseDown( 0, 0, mask ))
		{
			handled = TRUE;
		}
	}

	return handled;
}

BOOL LLContextMenu::handleRightMouseUp( S32 x, S32 y, MASK mask )
{
	S32 local_x = x - getRect().mLeft;
	S32 local_y = y - getRect().mBottom;

	if (!mHoveredAnyItem && !pointInView(local_x, local_y))
	{
		sMenuContainer->hideMenus();
		return TRUE;
	}


	BOOL result = handleMouseUp( x, y, mask );
	mHoveredAnyItem = FALSE;
	
	return result;
}

void LLContextMenu::draw()
{
	LLMenuGL::draw();
}

BOOL LLContextMenu::appendContextSubMenu(LLContextMenu *menu)
{
	
	if (menu == this)
	{
		llerrs << "Can't attach a context menu to itself" << llendl;
	}

	LLContextMenuBranch *item;
	LLContextMenuBranch::Params p;
	p.name = menu->getName();
	p.label = menu->getLabel();
	p.branch = menu;
	p.enabled_color=LLUIColorTable::instance().getColor("MenuItemEnabledColor");
	p.disabled_color=LLUIColorTable::instance().getColor("MenuItemDisabledColor");
	p.highlight_bg_color=LLUIColorTable::instance().getColor("MenuItemHighlightBgColor");
	p.highlight_fg_color=LLUIColorTable::instance().getColor("MenuItemHighlightFgColor");
	
	item = LLUICtrlFactory::create<LLContextMenuBranch>(p);
	LLMenuGL::sMenuContainer->addChild(item->getBranch());
	item->setFont( LLFontGL::getFontSansSerifSmall() );

	return append( item );
}

bool LLContextMenu::addChild(LLView* view, S32 tab_group)
{
	LLContextMenu* context = dynamic_cast<LLContextMenu*>(view);
	if (context)
		return appendContextSubMenu(context);

	LLMenuItemSeparatorGL* separator = dynamic_cast<LLMenuItemSeparatorGL*>(view);
	if (separator)
		return append(separator);

	LLMenuItemGL* item = dynamic_cast<LLMenuItemGL*>(view);
	if (item)
		return append(item);

	return false;
}