lltabcontainer.cpp

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#include "linden_common.h"

#include "lltabcontainer.h"

#include "llfocusmgr.h"
#include "llfontgl.h"
#include "llgl.h"

#include "llbutton.h"
#include "llrect.h"
#include "llpanel.h"
#include "llresmgr.h"
#include "llkeyboard.h"
#include "llresizehandle.h"
#include "llui.h"
#include "lltextbox.h"
#include "llcontrol.h"
#include "llcriticaldamp.h"
#include "lluictrlfactory.h"

#include "lltabcontainervertical.h"

#include "llglheaders.h"

const F32 SCROLL_STEP_TIME = 0.4f;
const F32 SCROLL_DELAY_TIME = 0.5f;
const S32 TAB_PADDING = 15;
const S32 TABCNTR_TAB_MIN_WIDTH = 60;
const S32 TABCNTR_TAB_MAX_WIDTH = 150;
const S32 TABCNTR_TAB_PARTIAL_WIDTH = 12;       // When tabs are parially obscured, how much can you still see.
const S32 TABCNTR_TAB_HEIGHT = 16;
const S32 TABCNTR_ARROW_BTN_SIZE = 16;
const S32 TABCNTR_BUTTON_PANEL_OVERLAP = 1;  // how many pixels the tab buttons and tab panels overlap.
const S32 TABCNTR_TAB_H_PAD = 4;


LLTabContainerCommon::LLTabContainerCommon( 
        const LLString& name, const LLRect& rect, 
        TabPosition pos, 
        void(*close_callback)(void*), void* callback_userdata,
        BOOL bordered )
        : 
        LLPanel(name, rect, bordered),
        mCurrentTabIdx(-1),
        mTabsHidden(FALSE),
        mScrolled(FALSE),
        mScrollPos(0),
        mScrollPosPixels(0),
        mMaxScrollPos(0),
        mCloseCallback( close_callback ),
        mCallbackUserdata( callback_userdata ),
        mTitleBox(NULL),
        mTopBorderHeight(LLPANEL_BORDER_WIDTH),
        mTabPosition(pos),
        mLockedTabCount(0)
{ 
        setMouseOpaque(FALSE);
        mDragAndDropDelayTimer.stop();
}


LLTabContainerCommon::LLTabContainerCommon( 
        const LLString& name,
        const LLString& rect_control,
        TabPosition pos,
        void(*close_callback)(void*), void* callback_userdata,
        BOOL bordered )
        : 
        LLPanel(name, rect_control, bordered),
        mCurrentTabIdx(-1),
        mTabsHidden(FALSE),
        mScrolled(FALSE),
        mScrollPos(0),
        mScrollPosPixels(0),
        mMaxScrollPos(0),
        mCloseCallback( close_callback ),
        mCallbackUserdata( callback_userdata ),
        mTitleBox(NULL),
        mTopBorderHeight(LLPANEL_BORDER_WIDTH),
        mTabPosition(pos),
        mLockedTabCount(0)
{
        setMouseOpaque(FALSE);
        mDragAndDropDelayTimer.stop();
}


LLTabContainerCommon::~LLTabContainerCommon()
{
        std::for_each(mTabList.begin(), mTabList.end(), DeletePointer());
}

LLView* LLTabContainerCommon::getChildByName(const LLString& name, BOOL recurse) const
{
        tuple_list_t::const_iterator itor;
        for (itor = mTabList.begin(); itor != mTabList.end(); ++itor)
        {
                LLPanel *panel = (*itor)->mTabPanel;
                if (panel->getName() == name)
                {
                        return panel;
                }
        }
        if (recurse)
        {
                for (itor = mTabList.begin(); itor != mTabList.end(); ++itor)
                {
                        LLPanel *panel = (*itor)->mTabPanel;
                        LLView *child = panel->getChildByName(name, recurse);
                        if (child)
                        {
                                return child;
                        }
                }
        }
        return LLView::getChildByName(name, recurse);
}

void LLTabContainerCommon::addPlaceholder(LLPanel* child, const LLString& label)
{
        addTabPanel(child, label, FALSE, NULL, NULL, 0, TRUE);
}

void LLTabContainerCommon::lockTabs(S32 num_tabs)
{
        // count current tabs or use supplied value and ensure no new tabs get
        // inserted between them
        mLockedTabCount = num_tabs > 0 ? num_tabs : getTabCount();
}

void LLTabContainerCommon::removeTabPanel(LLPanel* child)
{
        BOOL has_focus = gFocusMgr.childHasKeyboardFocus(this);

        // If the tab being deleted is the selected one, select a different tab.
        for(std::vector<LLTabTuple*>::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
                LLTabTuple* tuple = *iter;
                if( tuple->mTabPanel == child )
                {
                        removeChild( tuple->mButton );
                        delete tuple->mButton;

                        removeChild( tuple->mTabPanel );
//                      delete tuple->mTabPanel;
                        
                        mTabList.erase( iter );
                        delete tuple;

                        break;
                }
        }

        // make sure we don't have more locked tabs than we have tabs
        mLockedTabCount = llmin(getTabCount(), mLockedTabCount);

        if (mCurrentTabIdx >= (S32)mTabList.size())
        {
                mCurrentTabIdx = mTabList.size()-1;
        }
        selectTab(mCurrentTabIdx);
        if (has_focus)
        {
                LLPanel* panelp = getPanelByIndex(mCurrentTabIdx);
                if (panelp)
                {
                        panelp->setFocus(TRUE);
                }
        }

        updateMaxScrollPos();
}

void LLTabContainerCommon::deleteAllTabs()
{
        // Remove all the tab buttons and delete them.  Also, unlink all the child panels.
        for(std::vector<LLTabTuple*>::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
                LLTabTuple* tuple = *iter;

                removeChild( tuple->mButton );
                delete tuple->mButton;

                removeChild( tuple->mTabPanel );
//              delete tuple->mTabPanel;
        }

        // Actually delete the tuples themselves
        std::for_each(mTabList.begin(), mTabList.end(), DeletePointer());
        mTabList.clear();
        
        // And there isn't a current tab any more
        mCurrentTabIdx = -1;
}


LLPanel* LLTabContainerCommon::getCurrentPanel()
{
        if (mCurrentTabIdx < 0 || mCurrentTabIdx >= (S32) mTabList.size()) return NULL;
                
        return mTabList[mCurrentTabIdx]->mTabPanel;
}

LLTabContainerCommon::LLTabTuple* LLTabContainerCommon::getTabByPanel(LLPanel* child)
{
        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
                LLTabTuple* tuple = *iter;
                if( tuple->mTabPanel == child )
                {
                        return tuple;
                }
        }
        return NULL;
}

void LLTabContainerCommon::setTabChangeCallback(LLPanel* tab, void (*on_tab_clicked)(void*, bool))
{
        LLTabTuple* tuplep = getTabByPanel(tab);
        if (tuplep)
        {
                tuplep->mOnChangeCallback = on_tab_clicked;
        }
}

void LLTabContainerCommon::setTabUserData(LLPanel* tab, void* userdata)
{
        LLTabTuple* tuplep = getTabByPanel(tab);
        if (tuplep)
        {
                tuplep->mUserData = userdata;
        }
}

S32 LLTabContainerCommon::getCurrentPanelIndex()
{
        return mCurrentTabIdx;
}

S32 LLTabContainerCommon::getTabCount()
{
        return mTabList.size();
}

LLPanel* LLTabContainerCommon::getPanelByIndex(S32 index)
{
        if (index >= 0 && index < (S32)mTabList.size())
        {
                return mTabList[index]->mTabPanel;
        }
        return NULL;
}

S32 LLTabContainerCommon::getIndexForPanel(LLPanel* panel)
{
        for (S32 index = 0; index < (S32)mTabList.size(); index++)
        {
                if (mTabList[index]->mTabPanel == panel)
                {
                        return index;
                }
        }
        return -1;
}

S32 LLTabContainerCommon::getPanelIndexByTitle(const LLString& title)
{
        for (S32 index = 0 ; index < (S32)mTabList.size(); index++)
        {
                if (title == mTabList[index]->mButton->getLabelSelected())
                {
                        return index;
                }
        }
        return -1;
}

LLPanel *LLTabContainerCommon::getPanelByName(const LLString& name)
{
        for (S32 index = 0 ; index < (S32)mTabList.size(); index++)
        {
                LLPanel *panel = mTabList[index]->mTabPanel;
                if (name == panel->getName())
                {
                        return panel;
                }
        }
        return NULL;
}


void LLTabContainerCommon::scrollNext()
{
        // No wrap
        if( mScrollPos < mMaxScrollPos )
        {
                mScrollPos++;
        }
}

void LLTabContainerCommon::scrollPrev()
{
        // No wrap
        if( mScrollPos > 0 )
        {
                mScrollPos--;
        }
}

void LLTabContainerCommon::enableTabButton(S32 which, BOOL enable)
{
        if (which >= 0 && which < (S32)mTabList.size())
        {
                mTabList[which]->mButton->setEnabled(enable);
        }
}

BOOL LLTabContainerCommon::selectTabPanel(LLPanel* child)
{
        S32 idx = 0;
        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
                LLTabTuple* tuple = *iter;
                if( tuple->mTabPanel == child )
                {
                        return selectTab( idx );
                }
                idx++;
        }
        return FALSE;
}

BOOL LLTabContainerCommon::selectTabByName(const LLString& name)
{
        LLPanel* panel = getPanelByName(name);
        if (!panel)
        {
                llwarns << "LLTabContainerCommon::selectTabByName("
                        << name << ") failed" << llendl;
                return FALSE;
        }

        BOOL result = selectTabPanel(panel);
        return result;
}


void LLTabContainerCommon::selectFirstTab()
{
        selectTab( 0 );
}


void LLTabContainerCommon::selectLastTab()
{
        selectTab( mTabList.size()-1 );
}


void LLTabContainerCommon::selectNextTab()
{
        BOOL tab_has_focus = FALSE;
        if (mCurrentTabIdx >= 0 && mTabList[mCurrentTabIdx]->mButton->hasFocus())
        {
                tab_has_focus = TRUE;
        }
        S32 idx = mCurrentTabIdx+1;
        if (idx >= (S32)mTabList.size())
                idx = 0;
        while (!selectTab(idx) && idx != mCurrentTabIdx)
        {
                idx = (idx + 1 ) % (S32)mTabList.size();
        }

        if (tab_has_focus)
        {
                mTabList[idx]->mButton->setFocus(TRUE);
        }
}

void LLTabContainerCommon::selectPrevTab()
{
        BOOL tab_has_focus = FALSE;
        if (mCurrentTabIdx >= 0 && mTabList[mCurrentTabIdx]->mButton->hasFocus())
        {
                tab_has_focus = TRUE;
        }
        S32 idx = mCurrentTabIdx-1;
        if (idx < 0)
                idx = mTabList.size()-1;
        while (!selectTab(idx) && idx != mCurrentTabIdx)
        {
                idx = idx - 1;
                if (idx < 0)
                        idx = mTabList.size()-1;
        }
        if (tab_has_focus)
        {
                mTabList[idx]->mButton->setFocus(TRUE);
        }
}       


void LLTabContainerCommon::reshape(S32 width, S32 height, BOOL called_from_parent)
{
        LLPanel::reshape( width, height, called_from_parent );
        updateMaxScrollPos();
}

// static 
void LLTabContainerCommon::onTabBtn( void* userdata )
{
        LLTabTuple* tuple = (LLTabTuple*) userdata;
        LLTabContainerCommon* self = tuple->mTabContainer;
        self->selectTabPanel( tuple->mTabPanel );
        
        if( tuple->mOnChangeCallback )
        {
                tuple->mOnChangeCallback( tuple->mUserData, true );
        }

        tuple->mTabPanel->setFocus(TRUE);
}

// static 
void LLTabContainerCommon::onCloseBtn( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;
        if( self->mCloseCallback )
        {
                self->mCloseCallback( self->mCallbackUserdata );
        }
}

// static 
void LLTabContainerCommon::onNextBtn( void* userdata )
{
        // Scroll tabs to the left
        LLTabContainer* self = (LLTabContainer*) userdata;
        if (!self->mScrolled)
        {
                self->scrollNext();
        }
        self->mScrolled = FALSE;
}

// static 
void LLTabContainerCommon::onNextBtnHeld( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;
        if (self->mScrollTimer.getElapsedTimeF32() > SCROLL_STEP_TIME)
        {
                self->mScrollTimer.reset();
                self->scrollNext();
                self->mScrolled = TRUE;
        }
}

// static 
void LLTabContainerCommon::onPrevBtn( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;
        if (!self->mScrolled)
        {
                self->scrollPrev();
        }
        self->mScrolled = FALSE;
}


void LLTabContainerCommon::onJumpFirstBtn( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;
        
        self->mScrollPos = 0;

}


void LLTabContainerCommon::onJumpLastBtn( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;

        self->mScrollPos = self->mMaxScrollPos;
}


// static 
void LLTabContainerCommon::onPrevBtnHeld( void* userdata )
{
        LLTabContainer* self = (LLTabContainer*) userdata;
        if (self->mScrollTimer.getElapsedTimeF32() > SCROLL_STEP_TIME)
        {
                self->mScrollTimer.reset();
                self->scrollPrev();
                self->mScrolled = TRUE;
        }
}

BOOL LLTabContainerCommon::getTabPanelFlashing(LLPanel *child)
{
        LLTabTuple* tuple = getTabByPanel(child);
        if( tuple )
        {
                return tuple->mButton->getFlashing();
        }
        return FALSE;
}

void LLTabContainerCommon::setTabPanelFlashing(LLPanel* child, BOOL state )
{
        LLTabTuple* tuple = getTabByPanel(child);
        if( tuple )
        {
                tuple->mButton->setFlashing( state );
        }
}

void LLTabContainerCommon::setTabImage(LLPanel* child, std::string img_name, const LLColor4& color)
{
        LLTabTuple* tuple = getTabByPanel(child);
        if( tuple )
        {
                tuple->mButton->setImageOverlay(img_name, LLFontGL::RIGHT, color);
        }
}

void LLTabContainerCommon::setTitle(const LLString& title)
{
        if (mTitleBox)
        {
                mTitleBox->setText( title );
        }
}

const LLString LLTabContainerCommon::getPanelTitle(S32 index)
{
        if (index >= 0 && index < (S32)mTabList.size())
        {
                LLButton* tab_button = mTabList[index]->mButton;
                return tab_button->getLabelSelected();
        }
        return LLString::null;
}

void LLTabContainerCommon::setTopBorderHeight(S32 height)
{
        mTopBorderHeight = height;
}

// Change the name of the button for the current tab.
void LLTabContainerCommon::setCurrentTabName(const LLString& name)
{
        // Might not have a tab selected
        if (mCurrentTabIdx < 0) return;

        mTabList[mCurrentTabIdx]->mButton->setLabelSelected(name);
        mTabList[mCurrentTabIdx]->mButton->setLabelUnselected(name);
}

LLView* LLTabContainerCommon::fromXML(LLXMLNodePtr node, LLView *parent, LLUICtrlFactory *factory)
{
        LLString name("tab_container");
        node->getAttributeString("name", name);

        // Figure out if we are creating a vertical or horizontal tab container.
        bool is_vertical = false;
        LLTabContainer::TabPosition tab_position = LLTabContainer::TOP;
        if (node->hasAttribute("tab_position"))
        {
                LLString tab_position_string;
                node->getAttributeString("tab_position", tab_position_string);
                LLString::toLower(tab_position_string);

                if ("top" == tab_position_string)
                {
                        tab_position = LLTabContainer::TOP;
                        is_vertical = false;
                }
                else if ("bottom" == tab_position_string)
                {
                        tab_position = LLTabContainer::BOTTOM;
                        is_vertical = false;
                }
                else if ("left" == tab_position_string)
                {
                        is_vertical = true;
                }
        }
        BOOL border = FALSE;
        node->getAttributeBOOL("border", border);

        // Create the correct container type.
        LLTabContainerCommon*   tab_container = NULL;

        if (is_vertical)
        {
                // Vertical tabs can specify tab width
                U32 tab_width = TABCNTRV_TAB_WIDTH;
                if (node->hasAttribute("tab_width"))
                {
                        node->getAttributeU32("tab_width", tab_width);
                }

                tab_container = new LLTabContainerVertical(name,
                                LLRect::null,
                                NULL,
                                NULL,
                                tab_width,
                                border);

        }
        else // horizontal tab container
        {
                // Horizontal tabs can have a title (?)
                LLString title(LLString::null);
                if (node->hasAttribute("title"))
                {
                        node->getAttributeString("title", title);
                }

                tab_container = new LLTabContainer(name,
                                LLRect::null,
                                tab_position,
                                NULL,
                                NULL,
                                title,
                                border);
                
                if(node->hasAttribute("tab_min_width"))
                {
                        S32     minTabWidth=0;
                        node->getAttributeS32("tab_min_width",minTabWidth);
                        ((LLTabContainer*)tab_container)->setMinTabWidth(minTabWidth); 
                }
                if(node->hasAttribute("tab_max_width"))
                {
                        S32     maxTabWidth=0;
                        node->getAttributeS32("tab_max_width",maxTabWidth);
                        ((LLTabContainer*)tab_container)->setMaxTabWidth(maxTabWidth); 
                }
        }
        
        node->getAttributeBOOL("hide_tabs", tab_container->mTabsHidden);

        tab_container->setPanelParameters(node, parent);

        if (LLFloater::getFloaterHost())
        {
                LLFloater::getFloaterHost()->setTabContainer(tab_container);
        }

        //parent->addChild(tab_container);

        // Add all tab panels.
        LLXMLNodePtr child;
        for (child = node->getFirstChild(); child.notNull(); child = child->getNextSibling())
        {
                LLView *control = factory->createCtrlWidget(tab_container, child);
                if (control && control->isPanel())
                {
                        LLPanel* panelp = (LLPanel*)control;
                        LLString label;
                        child->getAttributeString("label", label);
                        if (label.empty())
                        {
                                label = panelp->getLabel();
                        }
                        BOOL placeholder = FALSE;
                        child->getAttributeBOOL("placeholder", placeholder);
                        tab_container->addTabPanel(panelp, label.c_str(), false,
                                                                           NULL, NULL, 0, placeholder);
                }
        }

        tab_container->selectFirstTab();

        tab_container->postBuild();

        tab_container->initButtons(); // now that we have the correct rect
        
        return tab_container;
}

void LLTabContainerCommon::insertTuple(LLTabTuple * tuple, eInsertionPoint insertion_point)
{
        switch(insertion_point)
        {
        case START:
                // insert the new tab in the front of the list
                mTabList.insert(mTabList.begin() + mLockedTabCount, tuple);
                break;
        case RIGHT_OF_CURRENT:
                // insert the new tab after the current tab (but not before mLockedTabCount)
                {
                tuple_list_t::iterator current_iter = mTabList.begin() + llmax(mLockedTabCount, mCurrentTabIdx + 1);
                mTabList.insert(current_iter, tuple);
                }
                break;
        case END:
        default:
                mTabList.push_back( tuple );
        }
}


LLTabContainer::LLTabContainer( 
        const LLString& name, const LLRect& rect, TabPosition pos,
        void(*close_callback)(void*), void* callback_userdata,
        const LLString& title, BOOL bordered )
        : 
        LLTabContainerCommon(name, rect, pos, close_callback, callback_userdata, bordered),
        mLeftArrowBtn(NULL),
        mJumpLeftArrowBtn(NULL),
        mRightArrowBtn(NULL),
        mJumpRightArrowBtn(NULL),
        mRightTabBtnOffset(0),
        mMinTabWidth(TABCNTR_TAB_MIN_WIDTH),
        mMaxTabWidth(TABCNTR_TAB_MAX_WIDTH),
        mTotalTabWidth(0)
{
        initButtons( );
}

LLTabContainer::LLTabContainer( 
        const LLString& name, const LLString& rect_control, TabPosition pos,
        void(*close_callback)(void*), void* callback_userdata,
        const LLString& title, BOOL bordered )
        : 
        LLTabContainerCommon(name, rect_control, pos, close_callback, callback_userdata, bordered),
        mLeftArrowBtn(NULL),
        mJumpLeftArrowBtn(NULL),
        mRightArrowBtn(NULL),
        mJumpRightArrowBtn(NULL),
        mRightTabBtnOffset(0),
        mMinTabWidth(TABCNTR_TAB_MIN_WIDTH),
        mMaxTabWidth(TABCNTR_TAB_MAX_WIDTH),
        mTotalTabWidth(0)
{
        initButtons( );
}

void LLTabContainer::initButtons()
{
        // Hack:
        if (mRect.getHeight() == 0 || mLeftArrowBtn)
        {
                return; // Don't have a rect yet or already got called
        }
        
        LLString out_id;
        LLString in_id;

        S32 arrow_fudge = 1;            //  match new art better 

        // tabs on bottom reserve room for resize handle (just in case)
        if (mTabPosition == BOTTOM)
        {
                mRightTabBtnOffset = RESIZE_HANDLE_WIDTH;
        }

        // Left and right scroll arrows (for when there are too many tabs to show all at once).
        S32 btn_top = (mTabPosition == TOP ) ? mRect.getHeight() - mTopBorderHeight : TABCNTR_ARROW_BTN_SIZE + 1;

        LLRect left_arrow_btn_rect;
        left_arrow_btn_rect.setLeftTopAndSize( LLPANEL_BORDER_WIDTH+1+TABCNTR_ARROW_BTN_SIZE, btn_top + arrow_fudge, TABCNTR_ARROW_BTN_SIZE, TABCNTR_ARROW_BTN_SIZE );

        LLRect jump_left_arrow_btn_rect;
        jump_left_arrow_btn_rect.setLeftTopAndSize( LLPANEL_BORDER_WIDTH+1, btn_top + arrow_fudge, TABCNTR_ARROW_BTN_SIZE, TABCNTR_ARROW_BTN_SIZE );

        S32 right_pad = TABCNTR_ARROW_BTN_SIZE + LLPANEL_BORDER_WIDTH + 1;

        LLRect right_arrow_btn_rect;
        right_arrow_btn_rect.setLeftTopAndSize( mRect.getWidth() - mRightTabBtnOffset - right_pad - TABCNTR_ARROW_BTN_SIZE,
                                                                                        btn_top + arrow_fudge,
                                                                                        TABCNTR_ARROW_BTN_SIZE, TABCNTR_ARROW_BTN_SIZE );


        LLRect jump_right_arrow_btn_rect;
        jump_right_arrow_btn_rect.setLeftTopAndSize( mRect.getWidth() - mRightTabBtnOffset - right_pad,
                                                                                        btn_top + arrow_fudge,
                                                                                        TABCNTR_ARROW_BTN_SIZE, TABCNTR_ARROW_BTN_SIZE );

        out_id = "UIImgBtnJumpLeftOutUUID";
        in_id = "UIImgBtnJumpLeftInUUID";
        mJumpLeftArrowBtn = new LLButton(
                "Jump Left Arrow", jump_left_arrow_btn_rect,
                out_id, in_id, "",
                &LLTabContainer::onJumpFirstBtn, this, LLFontGL::sSansSerif );
        mJumpLeftArrowBtn->setFollowsLeft();
        mJumpLeftArrowBtn->setSaveToXML(false);
        mJumpLeftArrowBtn->setTabStop(FALSE);
        addChild(mJumpLeftArrowBtn);

        out_id = "UIImgBtnScrollLeftOutUUID";
        in_id = "UIImgBtnScrollLeftInUUID";
        mLeftArrowBtn = new LLButton(
                "Left Arrow", left_arrow_btn_rect,
                out_id, in_id, "",
                &LLTabContainer::onPrevBtn, this, LLFontGL::sSansSerif );
        mLeftArrowBtn->setHeldDownCallback(onPrevBtnHeld);
        mLeftArrowBtn->setFollowsLeft();
        mLeftArrowBtn->setSaveToXML(false);
        mLeftArrowBtn->setTabStop(FALSE);
        addChild(mLeftArrowBtn);
        
        out_id = "UIImgBtnJumpRightOutUUID";
        in_id = "UIImgBtnJumpRightInUUID";
        mJumpRightArrowBtn = new LLButton(
                "Jump Right Arrow", jump_right_arrow_btn_rect,
                out_id, in_id, "",
                &LLTabContainer::onJumpLastBtn, this,
                LLFontGL::sSansSerif);
        mJumpRightArrowBtn->setFollowsRight();
        mJumpRightArrowBtn->setSaveToXML(false);
        mJumpRightArrowBtn->setTabStop(FALSE);
        addChild(mJumpRightArrowBtn);

        out_id = "UIImgBtnScrollRightOutUUID";
        in_id = "UIImgBtnScrollRightInUUID";
        mRightArrowBtn = new LLButton(
                "Right Arrow", right_arrow_btn_rect,
                out_id, in_id, "",
                &LLTabContainer::onNextBtn, this,
                LLFontGL::sSansSerif);
        mRightArrowBtn->setFollowsRight();
        mRightArrowBtn->setHeldDownCallback(onNextBtnHeld);
        mRightArrowBtn->setSaveToXML(false);
        mRightArrowBtn->setTabStop(FALSE);
        addChild(mRightArrowBtn);


        if( mTabPosition == TOP )
        {
                mRightArrowBtn->setFollowsTop();
                mLeftArrowBtn->setFollowsTop();
                mJumpLeftArrowBtn->setFollowsTop();
                mJumpRightArrowBtn->setFollowsTop();
        }
        else
        {
                mRightArrowBtn->setFollowsBottom();
                mLeftArrowBtn->setFollowsBottom();
                mJumpLeftArrowBtn->setFollowsBottom();
                mJumpRightArrowBtn->setFollowsBottom();
        }

        // set default tab group to be panel contents
        mDefaultTabGroup = 1;
}

LLTabContainer::~LLTabContainer()
{
}

void LLTabContainer::addTabPanel(LLPanel* child, 
                                                                 const LLString& label, 
                                                                 BOOL select, 
                                                                 void (*on_tab_clicked)(void*, bool), 
                                                                 void* userdata,
                                                                 S32 indent,
                                                                 BOOL placeholder,
                                                                 eInsertionPoint insertion_point)
{
        if (child->getParent() == this)
        {
                // already a child of mine
                return;
        }
        const LLFontGL* font = gResMgr->getRes( LLFONT_SANSSERIF_SMALL );

        // Store the original label for possible xml export.
        child->setLabel(label);
        LLString trimmed_label = label;
        LLString::trim(trimmed_label);

        S32 button_width = llclamp(font->getWidth(trimmed_label) + TAB_PADDING, mMinTabWidth, mMaxTabWidth);

        // Tab panel
        S32 tab_panel_top;
        S32 tab_panel_bottom;
        if( LLTabContainer::TOP == mTabPosition )
        {
                tab_panel_top = mRect.getHeight() - mTopBorderHeight - (TABCNTR_TAB_HEIGHT - TABCNTR_BUTTON_PANEL_OVERLAP);     
                tab_panel_bottom = LLPANEL_BORDER_WIDTH;
        }
        else
        {
                tab_panel_top = mRect.getHeight() - mTopBorderHeight;
                tab_panel_bottom = (TABCNTR_TAB_HEIGHT - TABCNTR_BUTTON_PANEL_OVERLAP);  // Run to the edge, covering up the border
        }
        
        LLRect tab_panel_rect(
                LLPANEL_BORDER_WIDTH, 
                tab_panel_top,
                mRect.getWidth()-LLPANEL_BORDER_WIDTH,
                tab_panel_bottom );

        child->setFollowsAll();
        child->translate( tab_panel_rect.mLeft - child->getRect().mLeft, tab_panel_rect.mBottom - child->getRect().mBottom);
        child->reshape( tab_panel_rect.getWidth(), tab_panel_rect.getHeight(), TRUE );
        child->setBackgroundVisible( FALSE );  // No need to overdraw
        // add this child later

        child->setVisible( FALSE );  // Will be made visible when selected

        mTotalTabWidth += button_width;

        // Tab button
        LLRect btn_rect;  // Note: btn_rect.mLeft is just a dummy.  Will be updated in draw().
        LLString tab_img;
        LLString tab_selected_img;
        S32 tab_fudge = 1;              //  To make new tab art look better, nudge buttons up 1 pel

        if( LLTabContainer::TOP == mTabPosition )
        {
                btn_rect.setLeftTopAndSize( 0, mRect.getHeight() - mTopBorderHeight + tab_fudge, button_width, TABCNTR_TAB_HEIGHT );
                tab_img = "UIImgBtnTabTopOutUUID";
                tab_selected_img = "UIImgBtnTabTopInUUID";
        }
        else
        {
                btn_rect.setOriginAndSize( 0, 0 + tab_fudge, button_width, TABCNTR_TAB_HEIGHT );
                tab_img = "UIImgBtnTabBottomOutUUID";
                tab_selected_img = "UIImgBtnTabBottomInUUID";
        }

        if (placeholder)
        {
                // *FIX: wont work for horizontal tabs
                btn_rect.translate(0, -LLBUTTON_V_PAD-2);
                LLString box_label = trimmed_label;
                LLTextBox* text = new LLTextBox(box_label, btn_rect, box_label, font);
                addChild( text, 0 );

                LLButton* btn = new LLButton("", LLRect(0,0,0,0));
                LLTabTuple* tuple = new LLTabTuple( this, child, btn, on_tab_clicked, userdata, text );
                addChild( btn, 0 );
                addChild( child, 1 );
                insertTuple(tuple, insertion_point);
        }
        else
        {
                LLString tooltip = trimmed_label;
                tooltip += "\nAlt-Left arrow for previous tab";
                tooltip += "\nAlt-Right arrow for next tab";

                LLButton* btn = new LLButton(
                        LLString(child->getName()) + " tab",
                        btn_rect, 
                        tab_img, tab_selected_img, "",
                        &LLTabContainer::onTabBtn, NULL, // set userdata below
                        font,
                        trimmed_label, trimmed_label );
                btn->setSaveToXML(false);
                btn->setVisible( FALSE );
                btn->setToolTip( tooltip );
                btn->setScaleImage(TRUE);
                btn->setFixedBorder(14, 14);

                // Try to squeeze in a bit more text
                btn->setLeftHPad( 4 );
                btn->setRightHPad( 2 );
                btn->setHAlign(LLFontGL::LEFT);
                btn->setTabStop(FALSE);
                if (indent)
                {
                        btn->setLeftHPad(indent);
                }

                if( mTabPosition == TOP )
                {
                        btn->setFollowsTop();
                }
                else
                {
                        btn->setFollowsBottom();
                }

                LLTabTuple* tuple = new LLTabTuple( this, child, btn, on_tab_clicked, userdata );
                btn->setCallbackUserData( tuple );
                addChild( btn, 0 );
                addChild( child, 1 );
                insertTuple(tuple, insertion_point);
        }

        updateMaxScrollPos();

        if( select )
        {
                selectLastTab();
        }
}

void LLTabContainer::removeTabPanel(LLPanel* child)
{
        // Adjust the total tab width.
        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
                LLTabTuple* tuple = *iter;
                if( tuple->mTabPanel == child )
                {
                        mTotalTabWidth -= tuple->mButton->getRect().getWidth();
                        break;
                }
        }

        LLTabContainerCommon::removeTabPanel(child);
}

void LLTabContainer::setPanelTitle(S32 index, const LLString& title)
{
        if (index >= 0 && index < (S32)mTabList.size())
        {
                LLTabTuple* tuple = mTabList[index];
                LLButton* tab_button = tuple->mButton;
                const LLFontGL* fontp = gResMgr->getRes( LLFONT_SANSSERIF_SMALL );
                mTotalTabWidth -= tab_button->getRect().getWidth();
                tab_button->reshape(llclamp(fontp->getWidth(title) + TAB_PADDING + tuple->mPadding, mMinTabWidth, mMaxTabWidth), tab_button->getRect().getHeight());
                mTotalTabWidth += tab_button->getRect().getWidth();
                tab_button->setLabelSelected(title);
                tab_button->setLabelUnselected(title);
        }
        updateMaxScrollPos();
}


void LLTabContainer::updateMaxScrollPos()
{
        S32 tab_space = 0;
        S32 available_space = 0;
        tab_space = mTotalTabWidth;
        available_space = mRect.getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + TABCNTR_TAB_H_PAD);

        if( tab_space > available_space )
        {
                S32 available_width_with_arrows = mRect.getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + TABCNTR_ARROW_BTN_SIZE  + TABCNTR_ARROW_BTN_SIZE + 1);
                // subtract off reserved portion on left
                available_width_with_arrows -= TABCNTR_TAB_PARTIAL_WIDTH;

                S32 running_tab_width = 0;
                mMaxScrollPos = mTabList.size();
                for(tuple_list_t::reverse_iterator tab_it = mTabList.rbegin(); tab_it != mTabList.rend(); ++tab_it)
                {
                        running_tab_width += (*tab_it)->mButton->getRect().getWidth();
                        if (running_tab_width > available_width_with_arrows)
                        {
                                break;
                        }
                        mMaxScrollPos--;
                }
                // in case last tab doesn't actually fit on screen, make it the last scrolling position
                mMaxScrollPos = llmin(mMaxScrollPos, (S32)mTabList.size() - 1);
        }
        else
        {
                mMaxScrollPos = 0;
                mScrollPos = 0;
        }
        if (mScrollPos > mMaxScrollPos)
        {
                mScrollPos = mMaxScrollPos;
        }
}

void LLTabContainer::commitHoveredButton(S32 x, S32 y)
{
        if (hasMouseCapture())
        {
                for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                {
                        LLTabTuple* tuple = *iter;
                        tuple->mButton->setVisible( TRUE );
                        S32 local_x = x - tuple->mButton->getRect().mLeft;
                        S32 local_y = y - tuple->mButton->getRect().mBottom;
                        if (tuple->mButton->pointInView(local_x, local_y) && tuple->mButton->getEnabled() && !tuple->mTabPanel->getVisible())
                        {
                                tuple->mButton->onCommit();
                        }
                }
        }
}

void LLTabContainer::setMinTabWidth(S32 width)
{
        mMinTabWidth = width;
}

void LLTabContainer::setMaxTabWidth(S32 width)
{
        mMaxTabWidth = width;
}

S32 LLTabContainer::getMinTabWidth() const
{
        return mMinTabWidth;
}

S32 LLTabContainer::getMaxTabWidth() const
{
        return mMaxTabWidth;
}

BOOL LLTabContainer::selectTab(S32 which)
{
        if (which >= (S32)mTabList.size()) return FALSE;
        if (which < 0) return FALSE;

        //if( gFocusMgr.childHasKeyboardFocus( this ) )
        //{
        //      gFocusMgr.setKeyboardFocus( NULL, NULL );
        //}

        LLTabTuple* selected_tuple = mTabList[which];
        if (!selected_tuple)
        {
                return FALSE;
        }
        
        if (mTabList[which]->mButton->getEnabled())
        {
                mCurrentTabIdx = which;

                S32 i = 0;
                for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                {
                        LLTabTuple* tuple = *iter;
                        BOOL is_selected = ( tuple == selected_tuple );
                        tuple->mTabPanel->setVisible( is_selected );
//                      tuple->mTabPanel->setFocus(is_selected); // not clear that we want to do this here.
                        tuple->mButton->setToggleState( is_selected );
                        // RN: this limits tab-stops to active button only, which would require arrow keys to switch tabs
                        tuple->mButton->setTabStop( is_selected );
                        
                        if( is_selected && mMaxScrollPos > 0)
                        {
                                // Make sure selected tab is within scroll region
                                if( i < mScrollPos )
                                {
                                        mScrollPos = i;
                                }
                                else
                                {
                                        S32 available_width_with_arrows = mRect.getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + TABCNTR_ARROW_BTN_SIZE  + TABCNTR_ARROW_BTN_SIZE + 1);
                                        S32 running_tab_width = tuple->mButton->getRect().getWidth();
                                        S32 j = i - 1;
                                        S32 min_scroll_pos = i;
                                        if (running_tab_width < available_width_with_arrows)
                                        {
                                                while (j >= 0)
                                                {
                                                        LLTabTuple* other_tuple = mTabList[j];
                                                        running_tab_width += other_tuple->mButton->getRect().getWidth();
                                                        if (running_tab_width > available_width_with_arrows)
                                                        {
                                                                break;
                                                        }
                                                        j--;
                                                }
                                                min_scroll_pos = j + 1;
                                        }
                                        mScrollPos = llclamp(mScrollPos, min_scroll_pos, i);
                                        mScrollPos = llmin(mScrollPos, mMaxScrollPos);
                                }
                        }
                        i++;
                }
                if( selected_tuple->mOnChangeCallback )
                {
                        selected_tuple->mOnChangeCallback( selected_tuple->mUserData, false );
                }
                return TRUE;
        }
        else
        {
                return FALSE;
        }
}

void LLTabContainer::draw()
{
        S32 target_pixel_scroll = 0;
        S32 cur_scroll_pos = mScrollPos;
        if (cur_scroll_pos > 0)
        {
                S32 available_width_with_arrows = mRect.getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + TABCNTR_ARROW_BTN_SIZE  + TABCNTR_ARROW_BTN_SIZE + 1);
                for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                {
                        if (cur_scroll_pos == 0)
                        {
                                break;
                        }
                        target_pixel_scroll += (*iter)->mButton->getRect().getWidth();
                        cur_scroll_pos--;
                }

                // Show part of the tab to the left of what is fully visible
                target_pixel_scroll -= TABCNTR_TAB_PARTIAL_WIDTH;
                // clamp so that rightmost tab never leaves right side of screen
                target_pixel_scroll = llmin(mTotalTabWidth - available_width_with_arrows, target_pixel_scroll);
        }

        mScrollPosPixels = (S32)lerp((F32)mScrollPosPixels, (F32)target_pixel_scroll, LLCriticalDamp::getInterpolant(0.08f));
        if( getVisible() )
        {
                BOOL has_scroll_arrows = (mMaxScrollPos > 0) || (mScrollPosPixels > 0);
                mJumpLeftArrowBtn->setVisible( has_scroll_arrows );
                mJumpRightArrowBtn->setVisible( has_scroll_arrows );
                mLeftArrowBtn->setVisible( has_scroll_arrows );
                mRightArrowBtn->setVisible( has_scroll_arrows );

                // Set the leftmost position of the tab buttons.
                S32 left = LLPANEL_BORDER_WIDTH + (has_scroll_arrows ? (TABCNTR_ARROW_BTN_SIZE * 2) : TABCNTR_TAB_H_PAD);
                left -= mScrollPosPixels;

                // Hide all the buttons
                for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                {
                        LLTabTuple* tuple = *iter;
                        tuple->mButton->setVisible( FALSE );
                }

                LLPanel::draw();

                // if tabs are hidden, don't draw them and leave them in the invisible state
                if (!mTabsHidden)
                {
                        // Show all the buttons
                        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                        {
                                LLTabTuple* tuple = *iter;
                                tuple->mButton->setVisible( TRUE );
                        }

                        // Draw some of the buttons...
                        LLRect clip_rect = getLocalRect();
                        if (has_scroll_arrows)
                        {
                                // ...but clip them.
                                clip_rect.mLeft = mLeftArrowBtn->getRect().mRight;
                                clip_rect.mRight = mRightArrowBtn->getRect().mLeft;
                        }
                        LLLocalClipRect clip(clip_rect);

                        S32 max_scroll_visible = mTabList.size() - mMaxScrollPos + mScrollPos;
                        S32 idx = 0;
                        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                        {
                                LLTabTuple* tuple = *iter;

                                tuple->mButton->translate( left - tuple->mButton->getRect().mLeft, 0 );
                                left += tuple->mButton->getRect().getWidth();

                                if( idx < mScrollPos )
                                {
                                        if( tuple->mButton->getFlashing() )
                                        {
                                                mLeftArrowBtn->setFlashing( TRUE );
                                        }
                                }
                                else
                                if( max_scroll_visible < idx )
                                {
                                        if( tuple->mButton->getFlashing() )
                                        {
                                                mRightArrowBtn->setFlashing( TRUE );
                                        }
                                }

                                LLUI::pushMatrix();
                                {
                                        LLUI::translate((F32)tuple->mButton->getRect().mLeft, (F32)tuple->mButton->getRect().mBottom, 0.f);
                                        tuple->mButton->draw();
                                }
                                LLUI::popMatrix();
                        
                                idx++;
                        }
                }

                mLeftArrowBtn->setFlashing(FALSE);
                mRightArrowBtn->setFlashing(FALSE);
        }
}


void LLTabContainer::setRightTabBtnOffset(S32 offset)
{
        mRightArrowBtn->translate( -offset - mRightTabBtnOffset, 0 );
        mRightTabBtnOffset = offset;
        updateMaxScrollPos();
}

BOOL LLTabContainer::handleMouseDown( S32 x, S32 y, MASK mask )
{
        BOOL handled = FALSE;
        BOOL has_scroll_arrows = (mMaxScrollPos > 0);

        if (has_scroll_arrows)
        {               
                if (mJumpLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mJumpLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpLeftArrowBtn->getRect().mBottom;
                        handled = mJumpLeftArrowBtn->handleMouseDown(local_x, local_y, mask);
                }
                if (mJumpRightArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mJumpRightArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpRightArrowBtn->getRect().mBottom;
                        handled = mJumpRightArrowBtn->handleMouseDown(local_x, local_y, mask);
                }
                if (mLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mLeftArrowBtn->getRect().mBottom;
                        handled = mLeftArrowBtn->handleMouseDown(local_x, local_y, mask);
                }
                else if (mRightArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mRightArrowBtn->getRect().mLeft;
                        S32 local_y = y - mRightArrowBtn->getRect().mBottom;
                        handled = mRightArrowBtn->handleMouseDown(local_x, local_y, mask);
                }
        }
        if (!handled)
        {
                handled = LLPanel::handleMouseDown( x, y, mask );
        }

        if (mTabList.size() > 0)
        {
                LLTabTuple* firsttuple = mTabList[0];
                LLRect tab_rect(has_scroll_arrows ? mLeftArrowBtn->getRect().mRight : mJumpLeftArrowBtn->getRect().mLeft,
                                                firsttuple->mButton->getRect().mTop,
                                                has_scroll_arrows ? mRightArrowBtn->getRect().mLeft : mJumpRightArrowBtn->getRect().mRight,
                                                firsttuple->mButton->getRect().mBottom );
                if( tab_rect.pointInRect( x, y ) )
                {
                        LLButton* tab_button = mTabList[getCurrentPanelIndex()]->mButton;
                        gFocusMgr.setMouseCapture(this);
                        gFocusMgr.setKeyboardFocus(tab_button, NULL);
                }
        }
        return handled;
}

BOOL LLTabContainer::handleHover( S32 x, S32 y, MASK mask )
{
        BOOL handled = FALSE;
        BOOL has_scroll_arrows = (mMaxScrollPos > 0);

        if (has_scroll_arrows)
        {               
                if (mJumpLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mJumpLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpLeftArrowBtn->getRect().mBottom;
                        handled = mJumpLeftArrowBtn->handleHover(local_x, local_y, mask);
                }
                if (mJumpRightArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mJumpRightArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpRightArrowBtn->getRect().mBottom;
                        handled = mJumpRightArrowBtn->handleHover(local_x, local_y, mask);
                }
                if (mLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mLeftArrowBtn->getRect().mBottom;
                        handled = mLeftArrowBtn->handleHover(local_x, local_y, mask);
                }
                else if (mRightArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mRightArrowBtn->getRect().mLeft;
                        S32 local_y = y - mRightArrowBtn->getRect().mBottom;
                        handled = mRightArrowBtn->handleHover(local_x, local_y, mask);
                }
        }
        if (!handled)
        {
                handled = LLPanel::handleHover(x, y, mask);
        }

        commitHoveredButton(x, y);
        return handled;
}

BOOL LLTabContainer::handleMouseUp( S32 x, S32 y, MASK mask )
{
        BOOL handled = FALSE;
        BOOL has_scroll_arrows = (mMaxScrollPos > 0);

        if (has_scroll_arrows)
        {
                if (mJumpLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mJumpLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpLeftArrowBtn->getRect().mBottom;
                        handled = mJumpLeftArrowBtn->handleMouseUp(local_x, local_y, mask);
                }               
                if (mJumpRightArrowBtn->getRect().pointInRect(x,        y))
                {
                        S32     local_x = x     - mJumpRightArrowBtn->getRect().mLeft;
                        S32     local_y = y     - mJumpRightArrowBtn->getRect().mBottom;
                        handled = mJumpRightArrowBtn->handleMouseUp(local_x,    local_y, mask);
                }
                if (mLeftArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mLeftArrowBtn->getRect().mLeft;
                        S32 local_y = y - mLeftArrowBtn->getRect().mBottom;
                        handled = mLeftArrowBtn->handleMouseUp(local_x, local_y, mask);
                }
                else if (mRightArrowBtn->getRect().pointInRect(x, y))
                {
                        S32 local_x = x - mRightArrowBtn->getRect().mLeft;
                        S32 local_y = y - mRightArrowBtn->getRect().mBottom;
                        handled = mRightArrowBtn->handleMouseUp(local_x, local_y, mask);
                }
        }
        if (!handled)
        {
                handled = LLPanel::handleMouseUp( x, y, mask );
        }

        commitHoveredButton(x, y);
        LLPanel* cur_panel = getCurrentPanel();
        if (hasMouseCapture())
        {
                if (cur_panel)
                {
                        if (!cur_panel->focusFirstItem(FALSE))
                        {
                                // if nothing in the panel gets focus, make sure the new tab does
                                // otherwise the last tab might keep focus
                                mTabList[getCurrentPanelIndex()]->mButton->setFocus(TRUE);
                        }
                }
                gFocusMgr.setMouseCapture(NULL);
        }
        return handled;
}

BOOL LLTabContainer::handleToolTip( S32 x, S32 y, LLString& msg, LLRect* sticky_rect )
{
        BOOL handled = LLPanel::handleToolTip( x, y, msg, sticky_rect );
        if (!handled && mTabList.size() > 0 && getVisible() && pointInView( x, y ) ) 
        {
                LLTabTuple* firsttuple = mTabList[0];

                BOOL has_scroll_arrows = (mMaxScrollPos > 0);
                LLRect clip(
                        has_scroll_arrows ? mJumpLeftArrowBtn->getRect().mRight : mJumpLeftArrowBtn->getRect().mLeft,
                        firsttuple->mButton->getRect().mTop,
                        has_scroll_arrows ? mRightArrowBtn->getRect().mLeft : mRightArrowBtn->getRect().mRight,
                        0 );
                if( clip.pointInRect( x, y ) )
                {
                        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                        {
                                LLTabTuple* tuple = *iter;
                                tuple->mButton->setVisible( TRUE );
                                S32 local_x = x - tuple->mButton->getRect().mLeft;
                                S32 local_y = y - tuple->mButton->getRect().mBottom;
                                handled = tuple->mButton->handleToolTip( local_x, local_y, msg, sticky_rect );
                                if( handled )
                                {
                                        break;
                                }
                        }
                }

                for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
                {
                        LLTabTuple* tuple = *iter;
                        tuple->mButton->setVisible( FALSE );
                }
        }
        return handled;
}

BOOL LLTabContainer::handleKeyHere(KEY key, MASK mask, BOOL called_from_parent)
{
        if (!getEnabled()) return FALSE;

        if (!gFocusMgr.childHasKeyboardFocus(this)) return FALSE;

        BOOL handled = FALSE;
        if (key == KEY_LEFT && mask == MASK_ALT)
        {
                selectPrevTab();
                handled = TRUE;
        }
        else if (key == KEY_RIGHT && mask == MASK_ALT)
        {
                selectNextTab();
                handled = TRUE;
        }

        if (handled)
        {
                if (getCurrentPanel())
                {
                        getCurrentPanel()->setFocus(TRUE);
                }
        }

        if (!gFocusMgr.childHasKeyboardFocus(getCurrentPanel()))
        {
                // if child has focus, but not the current panel, focus
                // is on a button
                switch(key)
                {
                case KEY_UP:
                        if (getTabPosition() == BOTTOM && getCurrentPanel())
                        {
                                getCurrentPanel()->setFocus(TRUE);
                        }
                        handled = TRUE;
                        break;
                case KEY_DOWN:
                        if (getTabPosition() == TOP && getCurrentPanel())
                        {
                                getCurrentPanel()->setFocus(TRUE);
                        }
                        handled = TRUE;
                        break;
                case KEY_LEFT:
                        selectPrevTab();
                        handled = TRUE;
                        break;
                case KEY_RIGHT:
                        selectNextTab();
                        handled = TRUE;
                        break;
                default:
                        break;
                }
        }
        return handled;
}

// virtual
LLXMLNodePtr LLTabContainer::getXML(bool save_children) const
{
        LLXMLNodePtr node = LLTabContainerCommon::getXML();

        node->createChild("tab_position", TRUE)->setStringValue((mTabPosition == TOP ? "top" : "bottom"));

        return node;
}

BOOL LLTabContainer::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,      EDragAndDropType type, void* cargo_data, EAcceptance *accept, LLString  &tooltip)
{
        BOOL has_scroll_arrows = (mMaxScrollPos > 0);

        if( mDragAndDropDelayTimer.getElapsedTimeF32() > SCROLL_DELAY_TIME )
        {

                if (has_scroll_arrows)
                {
                        if (mJumpLeftArrowBtn->getRect().pointInRect(x, y))
                        {
                                S32     local_x = x     - mJumpLeftArrowBtn->getRect().mLeft;
                                S32     local_y = y     - mJumpLeftArrowBtn->getRect().mBottom;
                                mJumpLeftArrowBtn->handleHover(local_x, local_y, mask);
                        }
                        if (mJumpRightArrowBtn->getRect().pointInRect(x,        y))
                        {
                                S32     local_x = x     - mJumpRightArrowBtn->getRect().mLeft;
                                S32     local_y = y     - mJumpRightArrowBtn->getRect().mBottom;
                                mJumpRightArrowBtn->handleHover(local_x,        local_y, mask);
                        }
                        if (mLeftArrowBtn->getRect().pointInRect(x,     y))
                        {
                                S32     local_x = x     - mLeftArrowBtn->getRect().mLeft;
                                S32     local_y = y     - mLeftArrowBtn->getRect().mBottom;
                                mLeftArrowBtn->handleHover(local_x,     local_y, mask);
                        }
                        else if (mRightArrowBtn->getRect().pointInRect(x, y))
                        {
                                S32     local_x = x     - mRightArrowBtn->getRect().mLeft;
                                S32     local_y = y     - mRightArrowBtn->getRect().mBottom;
                                mRightArrowBtn->handleHover(local_x, local_y, mask);
                        }
                }

                for(tuple_list_t::iterator iter = mTabList.begin();     iter !=  mTabList.end(); ++iter)
                {
                        LLTabTuple*     tuple = *iter;
                        tuple->mButton->setVisible(     TRUE );
                        S32     local_x = x     - tuple->mButton->getRect().mLeft;
                        S32     local_y = y     - tuple->mButton->getRect().mBottom;
                        if (tuple->mButton->pointInView(local_x, local_y) &&  tuple->mButton->getEnabled() && !tuple->mTabPanel->getVisible())
                        {
                                tuple->mButton->onCommit();
                                mDragAndDropDelayTimer.stop();
                        }
                }
        }

        return LLView::handleDragAndDrop(x,     y, mask, drop, type, cargo_data,  accept, tooltip);
}

void LLTabContainer::setTabImage(LLPanel* child, std::string image_name, const LLColor4& color)
{
        LLTabTuple* tuple = getTabByPanel(child);
        if( tuple )
        {
                tuple->mButton->setImageOverlay(image_name, LLFontGL::RIGHT, color);

                const LLFontGL* fontp = gResMgr->getRes( LLFONT_SANSSERIF_SMALL );
                // remove current width from total tab strip width
                mTotalTabWidth -= tuple->mButton->getRect().getWidth();

                S32 image_overlay_width = tuple->mButton->getImageOverlay().notNull() ? 
                        tuple->mButton->getImageOverlay()->getWidth(0) :
                        0;

                tuple->mPadding = image_overlay_width;

                tuple->mButton->setRightHPad(tuple->mPadding + LLBUTTON_H_PAD);
                tuple->mButton->reshape(llclamp(fontp->getWidth(tuple->mButton->getLabelSelected()) + TAB_PADDING + tuple->mPadding, mMinTabWidth, mMaxTabWidth), 
                                                                tuple->mButton->getRect().getHeight());
                // add back in button width to total tab strip width
                mTotalTabWidth += tuple->mButton->getRect().getWidth();

                // tabs have changed size, might need to scroll to see current tab
                updateMaxScrollPos();
        }
}

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