path: root/indra/llui/lltabcontainer.cpp

/**
 * @file lltabcontainer.cpp
 * @brief LLTabContainer class
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"

#include "lltabcontainer.h"
#include "llviewereventrecorder.h"
#include "llfocusmgr.h"
#include "lllocalcliprect.h"
#include "llrect.h"
#include "llresizehandle.h"
#include "lltextbox.h"
#include "llcriticaldamp.h"
#include "lluictrlfactory.h"
#include "llrender.h"
#include "llfloater.h"
#include "lltrans.h"
#include "lluiusage.h"

//----------------------------------------------------------------------------

// Implementation Notes:
//  - Each tab points to a LLPanel (see LLTabTuple below)
//  - When a tab is selected, the validation callback
//    (LLUICtrl::mValidateSignal) is called
//  -  If the validation callback returns true (or none is provided),
//     the tab is changed and the commit callback
//     (LLUICtrl::mCommitSignal) is called
//  - Callbacks pass the LLTabContainer as the control,
//    and the NAME of the selected PANEL as the LLSD data

//----------------------------------------------------------------------------

const F32 SCROLL_STEP_TIME = 0.4f;
const F32 SCROLL_DELAY_TIME = 0.5f;

void LLTabContainer::TabPositions::declareValues()
{
    declare("top", LLTabContainer::TOP);
    declare("bottom", LLTabContainer::BOTTOM);
    declare("left", LLTabContainer::LEFT);
}

//----------------------------------------------------------------------------

// Structure used to map tab buttons to and from tab panels
class LLTabTuple
{
public:
    LLTabTuple( LLTabContainer* c, LLPanel* p, LLButton* b, LLTextBox* placeholder = NULL)
        :
        mTabContainer(c),
        mTabPanel(p),
        mButton(b),
        mOldState(false),
        mPlaceholderText(placeholder),
        mPadding(0),
        mVisible(true)
    {}

    LLTabContainer*  mTabContainer;
    LLPanel*         mTabPanel;
    LLButton*        mButton;
    bool             mOldState;
    LLTextBox*       mPlaceholderText;
    S32              mPadding;

    mutable bool mVisible;
};

//----------------------------------------------------------------------------

//============================================================================
/*
 * @file lltabcontainer.cpp
 * @brief class implements LLButton with LLIconCtrl on it
 */
class LLCustomButtonIconCtrl : public LLButton
{
public:
    struct Params
    :   public LLInitParam::Block<Params, LLButton::Params>
    {
        // LEFT, RIGHT, TOP, BOTTOM paddings of LLIconCtrl in this class has same value
        Optional<S32>                   icon_ctrl_pad;

        Params()
        :   icon_ctrl_pad("icon_ctrl_pad", 1)
        {}
    };

protected:
    friend class LLUICtrlFactory;

    LLCustomButtonIconCtrl(const Params& p)
    :   LLButton(p),
        mIcon(NULL),
        mIconAlignment(LLFontGL::HCENTER),
        mIconCtrlPad(p.icon_ctrl_pad)
    {}

public:

    void updateLayout()
    {
        LLRect button_rect = getRect();
        LLRect icon_rect = mIcon->getRect();

        S32 icon_size = button_rect.getHeight() - 2*mIconCtrlPad;

        switch(mIconAlignment)
        {
        case LLFontGL::LEFT:
            icon_rect.setLeftTopAndSize(button_rect.mLeft + mIconCtrlPad, button_rect.mTop - mIconCtrlPad,
                icon_size, icon_size);
            setLeftHPad(icon_size + mIconCtrlPad * 2);
            break;
        case LLFontGL::HCENTER:
            icon_rect.setLeftTopAndSize(button_rect.mRight - (button_rect.getWidth() + mIconCtrlPad - icon_size)/2, button_rect.mTop - mIconCtrlPad,
                icon_size, icon_size);
            setRightHPad(icon_size + mIconCtrlPad * 2);
            break;
        case LLFontGL::RIGHT:
            icon_rect.setLeftTopAndSize(button_rect.mRight - mIconCtrlPad - icon_size, button_rect.mTop - mIconCtrlPad,
                icon_size, icon_size);
            setRightHPad(icon_size + mIconCtrlPad * 2);
            break;
        default:
            break;
        }
        mIcon->setRect(icon_rect);
    }

    void setIcon(LLIconCtrl* icon, LLFontGL::HAlign alignment = LLFontGL::LEFT)
    {
        if(icon)
        {
            if(mIcon)
            {
                removeChild(mIcon);
                mIcon->die();
            }
            mIcon = icon;
            mIconAlignment = alignment;

            addChild(mIcon);
            updateLayout();
        }
    }

    LLIconCtrl* getIconCtrl() const
    {
        return mIcon;
    }

private:
    LLIconCtrl* mIcon;
    LLFontGL::HAlign mIconAlignment;
    S32 mIconCtrlPad;
};
//============================================================================

struct LLPlaceHolderPanel : public LLPanel
{
    // create dummy param block to register with "placeholder" nane
    struct Params : public LLPanel::Params{};
    LLPlaceHolderPanel(const Params& p) : LLPanel(p)
    {}
};
static LLDefaultChildRegistry::Register<LLPlaceHolderPanel> r1("placeholder");
static LLDefaultChildRegistry::Register<LLTabContainer> r2("tab_container");

LLTabContainer::TabParams::TabParams()
:   tab_top_image_unselected("tab_top_image_unselected"),
    tab_top_image_selected("tab_top_image_selected"),
    tab_top_image_flash("tab_top_image_flash"),
    tab_bottom_image_unselected("tab_bottom_image_unselected"),
    tab_bottom_image_selected("tab_bottom_image_selected"),
    tab_bottom_image_flash("tab_bottom_image_flash"),
    tab_left_image_unselected("tab_left_image_unselected"),
    tab_left_image_selected("tab_left_image_selected"),
    tab_left_image_flash("tab_left_image_flash")
{}

LLTabContainer::Params::Params()
:   tab_width("tab_width"),
    tab_min_width("tab_min_width"),
    tab_max_width("tab_max_width"),
    tab_height("tab_height"),
    label_pad_bottom("label_pad_bottom"),
    label_pad_left("label_pad_left"),
    tab_position("tab_position"),
    hide_tabs("hide_tabs", false),
    hide_scroll_arrows("hide_scroll_arrows", false),
    tab_padding_right("tab_padding_right"),
    first_tab("first_tab"),
    middle_tab("middle_tab"),
    last_tab("last_tab"),
    use_custom_icon_ctrl("use_custom_icon_ctrl", false),
    open_tabs_on_drag_and_drop("open_tabs_on_drag_and_drop", false),
    enable_tabs_flashing("enable_tabs_flashing", false),
    tabs_flashing_color("tabs_flashing_color"),
    tab_icon_ctrl_pad("tab_icon_ctrl_pad", 0),
    use_ellipses("use_ellipses"),
    font_halign("halign"),
    use_tab_offset("use_tab_offset", false)
{}

LLTabContainer::LLTabContainer(const LLTabContainer::Params& p)
:   LLPanel(p),
    mCurrentTabIdx(-1),
    mTabsHidden(p.hide_tabs),
    mScrolled(false),
    mScrollPos(0),
    mScrollPosPixels(0),
    mMaxScrollPos(0),
    mTitleBox(NULL),
    mTopBorderHeight(LLPANEL_BORDER_WIDTH),
    mLockedTabCount(0),
    mMinTabWidth(0),
    mMaxTabWidth(p.tab_max_width),
    mTabHeight(p.tab_height),
    mLabelPadBottom(p.label_pad_bottom),
    mLabelPadLeft(p.label_pad_left),
    mPrevArrowBtn(NULL),
    mNextArrowBtn(NULL),
    mIsVertical( p.tab_position == LEFT ),
    mHideScrollArrows(p.hide_scroll_arrows),
    // Horizontal Specific
    mJumpPrevArrowBtn(NULL),
    mJumpNextArrowBtn(NULL),
    mRightTabBtnOffset(p.tab_padding_right),
    mTotalTabWidth(0),
    mTabPosition(p.tab_position),
    mFontHalign(p.font_halign),
    mFont(p.font),
    mFirstTabParams(p.first_tab),
    mMiddleTabParams(p.middle_tab),
    mLastTabParams(p.last_tab),
    mCustomIconCtrlUsed(p.use_custom_icon_ctrl),
    mOpenTabsOnDragAndDrop(p.open_tabs_on_drag_and_drop),
    mTabIconCtrlPad(p.tab_icon_ctrl_pad),
    mEnableTabsFlashing(p.enable_tabs_flashing),
    mTabsFlashingColor(p.tabs_flashing_color),
    mUseTabEllipses(p.use_ellipses),
    mUseTabOffset(p.use_tab_offset)
{
    static LLUICachedControl<S32> tabcntr_vert_tab_min_width ("UITabCntrVertTabMinWidth", 0);

    mDragAndDropDelayTimer.stop();

    if (p.tab_width.isProvided())
    {
        mMinTabWidth = p.tab_width;
    }
    else if (!mIsVertical)
    {
        mMinTabWidth = p.tab_min_width;
    }
    else
    {
        // *HACK: support default min width for legacy vertical
        // tab containers
        mMinTabWidth = tabcntr_vert_tab_min_width;
    }

    if (p.tabs_flashing_color.isProvided())
    {
        mEnableTabsFlashing = true;
    }

    initButtons( );
}

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

//virtual
void LLTabContainer::setValue(const LLSD& value)
{
    selectTab((S32) value.asInteger());
}

//virtual
void LLTabContainer::reshape(S32 width, S32 height, bool called_from_parent)
{
    LLPanel::reshape( width, height, called_from_parent );
    updateMaxScrollPos();
}

//virtual
LLView* LLTabContainer::getChildView(std::string_view 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->getChildView(name, recurse);
            if (child)
            {
                return child;
            }
        }
    }
    return LLView::getChildView(name, recurse);
}

//virtual
LLView* LLTabContainer::findChildView(std::string_view 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->findChildView(name, recurse);
            if (child)
            {
                return child;
            }
        }
    }
    return LLView::findChildView(name, recurse);
}

bool LLTabContainer::addChild(LLView* view, S32 tab_group)
{
    LLPanel* panelp = dynamic_cast<LLPanel*>(view);

    if (panelp)
    {
        addTabPanel(TabPanelParams().panel(panelp).label(panelp->getLabel()).is_placeholder(dynamic_cast<LLPlaceHolderPanel*>(view) != NULL));
        return true;
    }
    else
    {
        return LLUICtrl::addChild(view, tab_group);
    }
}

bool LLTabContainer::postBuild()
{
    selectFirstTab();

    return true;
}

// virtual
void LLTabContainer::draw()
{
    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    static LLUICachedControl<S32> tabcntrv_arrow_btn_size ("UITabCntrvArrowBtnSize", 0);
    static LLUICachedControl<S32> tabcntr_tab_h_pad ("UITabCntrTabHPad", 0);
    static LLUICachedControl<S32> tabcntr_arrow_btn_size ("UITabCntrArrowBtnSize", 0);
    static LLUICachedControl<S32> tabcntr_tab_partial_width ("UITabCntrTabPartialWidth", 0);
    S32 target_pixel_scroll = 0;
    S32 cur_scroll_pos = getScrollPos();
    if (cur_scroll_pos > 0)
    {
        if (mIsVertical)
        {
            target_pixel_scroll = cur_scroll_pos * (BTN_HEIGHT + tabcntrv_pad);
        }
        else
        {
            S32 available_width_with_arrows = getRect().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;
                }

                if( (*iter)->mVisible )
                    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);
        }
    }

    setScrollPosPixels((S32)lerp((F32)getScrollPosPixels(), (F32)target_pixel_scroll, LLSmoothInterpolation::getInterpolant(0.08f)));

    bool has_scroll_arrows = !mHideScrollArrows && !getTabsHidden() && ((mMaxScrollPos > 0) || (mScrollPosPixels > 0));
    if (!mIsVertical)
    {
        mJumpPrevArrowBtn->setVisible( has_scroll_arrows );
        mJumpNextArrowBtn->setVisible( has_scroll_arrows );
    }
    mPrevArrowBtn->setVisible( has_scroll_arrows );
    mNextArrowBtn->setVisible( has_scroll_arrows );

    S32 left = 0, top = 0;
    if (mIsVertical)
    {
        top = getRect().getHeight() - getTopBorderHeight() - LLPANEL_BORDER_WIDTH - 1 - (has_scroll_arrows ? tabcntrv_arrow_btn_size : 0);
        top += getScrollPosPixels();
    }
    else
    {
        // Set the leftmost position of the tab buttons.
        left = LLPANEL_BORDER_WIDTH + (has_scroll_arrows ? (tabcntr_arrow_btn_size * 2) : tabcntr_tab_h_pad);
        left -= getScrollPosPixels();
    }

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

    {
        LLRect clip_rect = getLocalRect();
        clip_rect.mLeft+=(LLPANEL_BORDER_WIDTH + 2);
        clip_rect.mRight-=(LLPANEL_BORDER_WIDTH + 2);
        LLLocalClipRect clip(clip_rect);
        LLPanel::draw();
    }

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

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

            if( !tuple->mVisible )
            {
                tuple->mButton->setVisible( false );
                continue;
            }

            tuple->mButton->translate( left ? left - tuple->mButton->getRect().mLeft : 0,
                                       top ? top - tuple->mButton->getRect().mTop : 0 );
            if (top) top -= BTN_HEIGHT + tabcntrv_pad;
            if (left) left += tuple->mButton->getRect().getWidth();

            if (!mIsVertical)
            {
                if( idx < getScrollPos() )
                {
                    if( tuple->mButton->getFlashing() )
                    {
                        mPrevArrowBtn->setFlashing( true );
                    }
                }
                else if( max_scroll_visible < idx )
                {
                    if( tuple->mButton->getFlashing() )
                    {
                        mNextArrowBtn->setFlashing( true );
                    }
                }
            }

            idx++;
        }


        if( mIsVertical && has_scroll_arrows )
        {
            // Redraw the arrows so that they appears on top.
            gGL.pushUIMatrix();
            gGL.translateUI((F32)mPrevArrowBtn->getRect().mLeft, (F32)mPrevArrowBtn->getRect().mBottom, 0.f);
            mPrevArrowBtn->draw();
            gGL.popUIMatrix();

            gGL.pushUIMatrix();
            gGL.translateUI((F32)mNextArrowBtn->getRect().mLeft, (F32)mNextArrowBtn->getRect().mBottom, 0.f);
            mNextArrowBtn->draw();
            gGL.popUIMatrix();
        }
    }

    mPrevArrowBtn->setFlashing(false);
    mNextArrowBtn->setFlashing(false);
}


// virtual
bool LLTabContainer::handleMouseDown( S32 x, S32 y, MASK mask )
{
    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    bool handled = false;
    bool has_scroll_arrows = !mHideScrollArrows && (getMaxScrollPos() > 0) && !getTabsHidden();

    if (has_scroll_arrows)
    {
        if (mJumpPrevArrowBtn&& mJumpPrevArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mJumpPrevArrowBtn->getRect().mLeft;
            S32 local_y = y - mJumpPrevArrowBtn->getRect().mBottom;
            handled = mJumpPrevArrowBtn->handleMouseDown(local_x, local_y, mask);
        }
        else if (mJumpNextArrowBtn && mJumpNextArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mJumpNextArrowBtn->getRect().mLeft;
            S32 local_y = y - mJumpNextArrowBtn->getRect().mBottom;
            handled = mJumpNextArrowBtn->handleMouseDown(local_x, local_y, mask);
        }
        else if (mPrevArrowBtn && mPrevArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mPrevArrowBtn->getRect().mLeft;
            S32 local_y = y - mPrevArrowBtn->getRect().mBottom;
            handled = mPrevArrowBtn->handleMouseDown(local_x, local_y, mask);
        }
        else if (mNextArrowBtn && mNextArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mNextArrowBtn->getRect().mLeft;
            S32 local_y = y - mNextArrowBtn->getRect().mBottom;
            handled = mNextArrowBtn->handleMouseDown(local_x, local_y, mask);
        }
    }
    if (!handled)
    {
        handled = LLPanel::handleMouseDown( x, y, mask );
    }

    S32 tab_count = getTabCount();
    if (tab_count > 0 && !getTabsHidden())
    {
        LLTabTuple* firsttuple = getTab(0);
        LLRect tab_rect;
        if (mIsVertical)
        {
            tab_rect = LLRect(firsttuple->mButton->getRect().mLeft,
                                has_scroll_arrows ? mPrevArrowBtn->getRect().mBottom - tabcntrv_pad : mPrevArrowBtn->getRect().mTop,
                                firsttuple->mButton->getRect().mRight,
                                has_scroll_arrows ? mNextArrowBtn->getRect().mTop + tabcntrv_pad : mNextArrowBtn->getRect().mBottom );
        }
        else
        {
            tab_rect = LLRect(has_scroll_arrows ? mPrevArrowBtn->getRect().mRight : mJumpPrevArrowBtn->getRect().mLeft,
                                firsttuple->mButton->getRect().mTop,
                                has_scroll_arrows ? mNextArrowBtn->getRect().mLeft : mJumpNextArrowBtn->getRect().mRight,
                                firsttuple->mButton->getRect().mBottom );
        }
        if( tab_rect.pointInRect( x, y ) )
        {
            S32 index = getCurrentPanelIndex();
            index = llclamp(index, 0, tab_count-1);
            LLButton* tab_button = getTab(index)->mButton;
            gFocusMgr.setMouseCapture(this);
            tab_button->setFocus(true);
            mMouseDownTimer.start();
        }
    }
    if (handled) {
        // Note: May need to also capture local coords right here ?
        LLViewerEventRecorder::instance().update_xui(getPathname( ));
    }

    return handled;
}

// virtual
bool LLTabContainer::handleHover( S32 x, S32 y, MASK mask )
{
    bool handled = false;
    bool has_scroll_arrows = !mHideScrollArrows && (getMaxScrollPos() > 0) && !getTabsHidden();

    if (has_scroll_arrows)
    {
        if (mJumpPrevArrowBtn && mJumpPrevArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mJumpPrevArrowBtn->getRect().mLeft;
            S32 local_y = y - mJumpPrevArrowBtn->getRect().mBottom;
            handled = mJumpPrevArrowBtn->handleHover(local_x, local_y, mask);
        }
        else if (mJumpNextArrowBtn && mJumpNextArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mJumpNextArrowBtn->getRect().mLeft;
            S32 local_y = y - mJumpNextArrowBtn->getRect().mBottom;
            handled = mJumpNextArrowBtn->handleHover(local_x, local_y, mask);
        }
        else if (mPrevArrowBtn && mPrevArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mPrevArrowBtn->getRect().mLeft;
            S32 local_y = y - mPrevArrowBtn->getRect().mBottom;
            handled = mPrevArrowBtn->handleHover(local_x, local_y, mask);
        }
        else if (mNextArrowBtn && mNextArrowBtn->getRect().pointInRect(x, y))
        {
            S32 local_x = x - mNextArrowBtn->getRect().mLeft;
            S32 local_y = y - mNextArrowBtn->getRect().mBottom;
            handled = mNextArrowBtn->handleHover(local_x, local_y, mask);
        }
    }
    if (!handled)
    {
        handled = LLPanel::handleHover(x, y, mask);
    }

    F32 drag_delay = 0.25f; // filter out clicks from dragging
    if (mMouseDownTimer.getElapsedTimeF32() > drag_delay)
    {
        commitHoveredButton(x, y);
    }
    return handled;
}

// virtual
bool LLTabContainer::handleMouseUp( S32 x, S32 y, MASK mask )
{
    bool handled = false;
    bool has_scroll_arrows = !mHideScrollArrows && (getMaxScrollPos() > 0)  && !getTabsHidden();

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

    if (has_scroll_arrows)
    {
        if (mJumpPrevArrowBtn && mJumpPrevArrowBtn->getRect().pointInRect(x, y))
        {
            local_x = x - mJumpPrevArrowBtn->getRect().mLeft;
            local_y = y - mJumpPrevArrowBtn->getRect().mBottom;
            handled = mJumpPrevArrowBtn->handleMouseUp(local_x, local_y, mask);
        }
        else if (mJumpNextArrowBtn && mJumpNextArrowBtn->getRect().pointInRect(x,   y))
        {
            local_x = x - mJumpNextArrowBtn->getRect().mLeft;
            local_y = y - mJumpNextArrowBtn->getRect().mBottom;
            handled = mJumpNextArrowBtn->handleMouseUp(local_x, local_y, mask);
        }
        else if (mPrevArrowBtn && mPrevArrowBtn->getRect().pointInRect(x, y))
        {
            local_x = x - mPrevArrowBtn->getRect().mLeft;
            local_y = y - mPrevArrowBtn->getRect().mBottom;
            handled = mPrevArrowBtn->handleMouseUp(local_x, local_y, mask);
        }
        else if (mNextArrowBtn && mNextArrowBtn->getRect().pointInRect(x, y))
        {
            local_x = x - mNextArrowBtn->getRect().mLeft;
            local_y = y - mNextArrowBtn->getRect().mBottom;
            handled = mNextArrowBtn->handleMouseUp(local_x, local_y, mask);
        }
    }
    if (!handled)
    {
        handled = LLPanel::handleMouseUp( x, y, mask );
    }

    commitHoveredButton(x, y);
    mMouseDownTimer.stop();
    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
                getTab(getCurrentPanelIndex())->mButton->setFocus(true);
            }
        }
        gFocusMgr.setMouseCapture(NULL);
    }
    if (handled) {
        // Note: may need to capture local coords here
        LLViewerEventRecorder::instance().update_xui(getPathname( ));
    }
    return handled;
}

// virtual
bool LLTabContainer::handleToolTip( S32 x, S32 y, MASK mask)
{
    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    bool handled = LLPanel::handleToolTip( x, y, mask);
    if (!handled && getTabCount() > 0 && !getTabsHidden())
    {
        LLTabTuple* firsttuple = getTab(0);

        bool has_scroll_arrows = !mHideScrollArrows && (getMaxScrollPos() > 0);
        LLRect clip;
        if (mIsVertical)
        {
            clip = LLRect(firsttuple->mButton->getRect().mLeft,
                          has_scroll_arrows ? mPrevArrowBtn->getRect().mBottom - tabcntrv_pad : mPrevArrowBtn->getRect().mTop,
                          firsttuple->mButton->getRect().mRight,
                          has_scroll_arrows ? mNextArrowBtn->getRect().mTop + tabcntrv_pad : mNextArrowBtn->getRect().mBottom );
        }
        else
        {
            clip = LLRect(has_scroll_arrows ? mPrevArrowBtn->getRect().mRight : mJumpPrevArrowBtn->getRect().mLeft,
                          firsttuple->mButton->getRect().mTop,
                          has_scroll_arrows ? mNextArrowBtn->getRect().mLeft : mJumpNextArrowBtn->getRect().mRight,
                          firsttuple->mButton->getRect().mBottom );
        }

        if( clip.pointInRect( x, y ) )
        {
            for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
            {
                LLButton* tab_button = (*iter)->mButton;
                if (!tab_button->getVisible()) continue;
                S32 local_x = x - tab_button->getRect().mLeft;
                S32 local_y = y - tab_button->getRect().mBottom;
                handled = tab_button->handleToolTip(local_x, local_y, mask);
                if( handled )
                {
                    break;
                }
            }
        }
    }
    return handled;
}

// virtual
bool LLTabContainer::handleKeyHere(KEY key, MASK mask)
{
    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
        if (mIsVertical)
        {
            switch(key)
            {
              case KEY_UP:
                selectPrevTab();
                handled = true;
                break;
              case KEY_DOWN:
                selectNextTab();
                handled = true;
                break;
              case KEY_LEFT:
                handled = true;
                break;
              case KEY_RIGHT:
                if (getTabPosition() == LEFT && getCurrentPanel())
                {
                    getCurrentPanel()->setFocus(true);
                }
                handled = true;
                break;
              default:
                break;
            }
        }
        else
        {
            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
bool LLTabContainer::handleDragAndDrop(S32 x, S32 y, MASK mask, bool drop,  EDragAndDropType type, void* cargo_data, EAcceptance *accept, std::string   &tooltip)
{
    bool has_scroll_arrows = !mHideScrollArrows && (getMaxScrollPos() > 0);

    if(mOpenTabsOnDragAndDrop && !getTabsHidden())
    {
        // In that case, we'll open the hovered tab while dragging and dropping items.
        // This allows for drilling through tabs.
        if (mDragAndDropDelayTimer.getStarted())
        {
            if (mDragAndDropDelayTimer.getElapsedTimeF32() > SCROLL_DELAY_TIME)
            {
                if (has_scroll_arrows)
                {
                    if (mJumpPrevArrowBtn && mJumpPrevArrowBtn->getRect().pointInRect(x, y))
                    {
                        S32 local_x = x - mJumpPrevArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpPrevArrowBtn->getRect().mBottom;
                        mJumpPrevArrowBtn->handleHover(local_x, local_y, mask);
                    }
                    if (mJumpNextArrowBtn && mJumpNextArrowBtn->getRect().pointInRect(x, y))
                    {
                        S32 local_x = x - mJumpNextArrowBtn->getRect().mLeft;
                        S32 local_y = y - mJumpNextArrowBtn->getRect().mBottom;
                        mJumpNextArrowBtn->handleHover(local_x, local_y, mask);
                    }
                    if (mPrevArrowBtn->getRect().pointInRect(x, y))
                    {
                        S32 local_x = x - mPrevArrowBtn->getRect().mLeft;
                        S32 local_y = y - mPrevArrowBtn->getRect().mBottom;
                        mPrevArrowBtn->handleHover(local_x, local_y, mask);
                    }
                    else if (mNextArrowBtn->getRect().pointInRect(x, y))
                    {
                        S32 local_x = x - mNextArrowBtn->getRect().mLeft;
                        S32 local_y = y - mNextArrowBtn->getRect().mBottom;
                        mNextArrowBtn->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();
                    }
                }
                // Stop the timer whether successful or not. Don't let it run forever.
                mDragAndDropDelayTimer.stop();
            }
        }
        else
        {
            // Start a timer so we don't open tabs as soon as we hover on them
            mDragAndDropDelayTimer.start();
        }
    }

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

void LLTabContainer::addTabPanel(LLPanel* panelp)
{
    addTabPanel(TabPanelParams().panel(panelp));
}

// function to update images
void LLTabContainer::update_images(LLTabTuple* tuple, TabParams params, LLTabContainer::TabPosition pos)
{
    if (tuple && tuple->mButton)
    {
        if (pos == LLTabContainer::TOP)
        {
            tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_top_image_unselected));
            tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_top_image_selected));
            tuple->mButton->setImageFlash(static_cast<LLUIImage*>(params.tab_top_image_flash));
        }
        else if (pos == LLTabContainer::BOTTOM)
        {
            tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_bottom_image_unselected));
            tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_bottom_image_selected));
            tuple->mButton->setImageFlash(static_cast<LLUIImage*>(params.tab_bottom_image_flash));
        }
        else if (pos == LLTabContainer::LEFT)
        {
            tuple->mButton->setImageUnselected(static_cast<LLUIImage*>(params.tab_left_image_unselected));
            tuple->mButton->setImageSelected(static_cast<LLUIImage*>(params.tab_left_image_selected));
            tuple->mButton->setImageFlash(static_cast<LLUIImage*>(params.tab_left_image_flash));
        }
    }
}

void LLTabContainer::addTabPanel(const TabPanelParams& panel)
{
    LLPanel* child = panel.panel();

    llassert(child);
    if (!child) return;

    const std::string& label = panel.label.isProvided()
            ? panel.label()
            : panel.panel()->getLabel();
    bool select = panel.select_tab();
    S32 indent = panel.indent();
    bool placeholder = panel.is_placeholder;
    eInsertionPoint insertion_point = panel.insert_at();

    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    static LLUICachedControl<S32> tabcntr_button_panel_overlap ("UITabCntrButtonPanelOverlap", 0);
    static LLUICachedControl<S32> tab_padding ("UITabPadding", 0);
    if (child->getParent() == this)
    {
        // already a child of mine
        return;
    }

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

    S32 button_width = mMinTabWidth;
    if (!mIsVertical)
    {
        button_width = llclamp(mFont->getWidth(trimmed_label) + tab_padding, mMinTabWidth, mMaxTabWidth);
    }

    // Tab panel
    S32 tab_panel_top;
    S32 tab_panel_bottom;
    if (!getTabsHidden())
    {
        if( getTabPosition() == LLTabContainer::TOP )
        {
            S32 tab_height = mIsVertical ? BTN_HEIGHT : mTabHeight;
            tab_panel_top = getRect().getHeight() - getTopBorderHeight() - (tab_height - tabcntr_button_panel_overlap);
            tab_panel_bottom = LLPANEL_BORDER_WIDTH;
        }
        else
        {
            tab_panel_top = getRect().getHeight() - getTopBorderHeight();
            tab_panel_bottom = (mTabHeight - tabcntr_button_panel_overlap);  // Run to the edge, covering up the border
        }
    }
    else
    {
        // Skip tab button space if tabs are invisible (EXT-576)
        tab_panel_top = getRect().getHeight();
        tab_panel_bottom = LLPANEL_BORDER_WIDTH;
    }

    LLRect tab_panel_rect;
    if (!getTabsHidden() && mIsVertical)
    {
        tab_panel_rect = LLRect(mMinTabWidth + mRightTabBtnOffset + (LLPANEL_BORDER_WIDTH * 2) + tabcntrv_pad,
                                getRect().getHeight() - LLPANEL_BORDER_WIDTH,
                                getRect().getWidth() - LLPANEL_BORDER_WIDTH,
                                LLPANEL_BORDER_WIDTH);
    }
    else
    {
        S32 left_offset = mUseTabOffset ? LLPANEL_BORDER_WIDTH * 3 : LLPANEL_BORDER_WIDTH;
        S32 right_offset = mUseTabOffset ? LLPANEL_BORDER_WIDTH * 2 : LLPANEL_BORDER_WIDTH;
        tab_panel_rect = LLRect(left_offset, tab_panel_top, getRect().getWidth() - right_offset, 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 );
    // 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().
    LLUIImage* tab_img = NULL;
    LLUIImage* tab_selected_img = NULL;
    S32 tab_fudge = 1;      //  To make new tab art look better, nudge buttons up 1 pel

    if (mIsVertical)
    {
        btn_rect.setLeftTopAndSize(tabcntrv_pad + LLPANEL_BORDER_WIDTH + 2, // JC - Fudge factor
                                   (getRect().getHeight() - getTopBorderHeight() - LLPANEL_BORDER_WIDTH - 1) - ((BTN_HEIGHT + tabcntrv_pad) * getTabCount()),
                                   mMinTabWidth,
                                   BTN_HEIGHT);
    }
    else if( getTabPosition() == LLTabContainer::TOP )
    {
        btn_rect.setLeftTopAndSize( 0, getRect().getHeight() - getTopBorderHeight() + tab_fudge, button_width, mTabHeight);
        tab_img = mMiddleTabParams.tab_top_image_unselected;
        tab_selected_img = mMiddleTabParams.tab_top_image_selected;
    }
    else
    {
        btn_rect.setOriginAndSize( 0, 0 + tab_fudge, button_width, mTabHeight);
        tab_img = mMiddleTabParams.tab_bottom_image_unselected;
        tab_selected_img = mMiddleTabParams.tab_bottom_image_selected;
    }

    LLTextBox* textbox = NULL;
    LLButton* btn = NULL;
    LLCustomButtonIconCtrl::Params custom_btn_params;
    {
        custom_btn_params.icon_ctrl_pad(mTabIconCtrlPad);
    }
    LLButton::Params normal_btn_params;

    if (placeholder)
    {
        btn_rect.translate(0, -6); // *TODO: make configurable
        LLTextBox::Params params;
        params.name(trimmed_label);
        params.rect(btn_rect);
        params.initial_value(trimmed_label);
        params.font(mFont);
        textbox = LLUICtrlFactory::create<LLTextBox> (params);

        LLButton::Params p;
        p.name("placeholder");
        btn = LLUICtrlFactory::create<LLButton>(p);
    }
    else
    {
        LLButton::Params& p = (mCustomIconCtrlUsed ? custom_btn_params : normal_btn_params);

        p.rect(btn_rect);
        p.font(mFont);
        p.font_halign = mFontHalign;
        p.label(trimmed_label);
        p.click_callback.function(boost::bind(&LLTabContainer::onTabBtn, this, _2, child));
        if (indent)
        {
            p.pad_left(indent);
        }
        p.pad_bottom( mLabelPadBottom );
        p.scale_image(true);
        p.tab_stop(false);
        p.label_shadow(false);
        p.follows.flags = FOLLOWS_LEFT;

        if (mIsVertical)
        {
          p.name("vtab_"+std::string(child->getName()));
          p.image_unselected(mMiddleTabParams.tab_left_image_unselected);
          p.image_selected(mMiddleTabParams.tab_left_image_selected);
          p.follows.flags = p.follows.flags() | FOLLOWS_TOP;
        }
        else
        {
            p.name("htab_"+std::string(child->getName()));
            p.visible(false);
            p.image_unselected(tab_img);
            p.image_selected(tab_selected_img);
            p.follows.flags = p.follows.flags() | (getTabPosition() == TOP ? FOLLOWS_TOP : FOLLOWS_BOTTOM);
            // Try to squeeze in a bit more text
            p.pad_left( mLabelPadLeft );
            p.pad_right(2);
        }

        // inits flash timer
        p.button_flash_enable = mEnableTabsFlashing;
        p.flash_color = mTabsFlashingColor;

        // *TODO : It seems wrong not to use p in both cases considering the way p is initialized
        if (mCustomIconCtrlUsed)
        {
            btn = LLUICtrlFactory::create<LLCustomButtonIconCtrl>(custom_btn_params);
        }
        else
        {
            btn = LLUICtrlFactory::create<LLButton>(p);
        }
    }

    LLTabTuple* tuple = new LLTabTuple( this, child, btn, textbox );
    insertTuple( tuple, insertion_point );

    // if new tab was added as a first or last tab, update button image
    // and update button image of any tab it may have affected
    if (tuple == mTabList.front())
    {
        update_images(tuple, mFirstTabParams, getTabPosition());

        if (mTabList.size() == 2)
        {
            update_images(mTabList[1], mLastTabParams, getTabPosition());
        }
        else if (mTabList.size() > 2)
        {
            update_images(mTabList[1], mMiddleTabParams, getTabPosition());
        }
    }
    else if (tuple == mTabList.back())
    {
        update_images(tuple, mLastTabParams, getTabPosition());

        if (mTabList.size() > 2)
        {
            update_images(mTabList[mTabList.size()-2], mMiddleTabParams, getTabPosition());
        }
    }

    //Don't add button and textbox if tab buttons are invisible(EXT - 576)
    if (!getTabsHidden())
    {
        if (textbox)
        {
            addChild( textbox, 0 );
        }
        if (btn)
        {
            addChild( btn, 0 );
        }
    }
    else
    {
        if (textbox)
        {
            LLUICtrl::addChild(textbox, 0);
        }
        if (btn)
        {
            LLUICtrl::addChild(btn, 0);
        }
    }

    if (child)
    {
        LLUICtrl::addChild(child, 1);
    }

    sendChildToFront(mPrevArrowBtn);
    sendChildToFront(mNextArrowBtn);
    sendChildToFront(mJumpPrevArrowBtn);
    sendChildToFront(mJumpNextArrowBtn);

    updateMaxScrollPos();

    if( select )
    {
        selectLastTab();
        mScrollPos = mMaxScrollPos;
    }

}

void LLTabContainer::addPlaceholder(LLPanel* child, const std::string& label)
{
    addTabPanel(TabPanelParams().panel(child).label(label).is_placeholder(true));
}

void LLTabContainer::removeTabPanel(LLPanel* child)
{
    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    if (mIsVertical)
    {
        // Fix-up button sizes
        S32 tab_count = 0;
        for(tuple_list_t::iterator iter = mTabList.begin(); iter != mTabList.end(); ++iter)
        {
            LLTabTuple* tuple = *iter;
            LLRect rect;
            rect.setLeftTopAndSize(tabcntrv_pad + LLPANEL_BORDER_WIDTH + 2, // JC - Fudge factor
                                   (getRect().getHeight() - LLPANEL_BORDER_WIDTH - 1) - ((BTN_HEIGHT + tabcntrv_pad) * (tab_count)),
                                   mMinTabWidth,
                                   BTN_HEIGHT);
            if (tuple->mPlaceholderText)
            {
                tuple->mPlaceholderText->setRect(rect);
            }
            else
            {
                tuple->mButton->setRect(rect);
            }
            tab_count++;
        }
    }
    else
    {
        // 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;
            }
        }
    }

    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 )
        {
            // update tab button images if removing the first or last tab
            if ((tuple == mTabList.front()) && (mTabList.size() > 1))
            {
                update_images(mTabList[1], mFirstTabParams, getTabPosition());
            }
            else if ((tuple == mTabList.back()) && (mTabList.size() > 2))
            {
                update_images(mTabList[mTabList.size()-2], mLastTabParams, getTabPosition());
            }

            if (!getTabsHidden())
            {
                // We need to remove tab buttons only if the tabs are not hidden.
                removeChild( tuple->mButton );
            }
            delete tuple->mButton;
            tuple->mButton = NULL;

            removeChild( tuple->mTabPanel );
//          delete tuple->mTabPanel;
            tuple->mTabPanel = NULL;

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

    updateMaxScrollPos();
}

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

void LLTabContainer::unlockTabs()
{
    mLockedTabCount = 0;
}

void LLTabContainer::enableTabButton(S32 which, bool enable)
{
    if (which >= 0 && which < (S32)mTabList.size())
    {
        mTabList[which]->mButton->setEnabled(enable);
    }
    // Stop the DaD timer as it might run forever
    // enableTabButton() is typically called on refresh and draw when anything changed
    // in the tab container so it's a good time to reset that.
    mDragAndDropDelayTimer.stop();
}

void LLTabContainer::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;
        tuple->mButton = NULL;

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

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

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

S32 LLTabContainer::getTabCount()
{
    return static_cast<S32>(mTabList.size());
}

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

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

S32 LLTabContainer::getPanelIndexByTitle(std::string_view title)
{
    for (S32 index = 0 ; index < (S32)mTabList.size(); index++)
    {
        if (title == mTabList[index]->mButton->getLabelSelected())
        {
            return index;
        }
    }
    return -1;
}

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

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

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

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


void LLTabContainer::selectLastTab()
{
    selectTab(static_cast<S32>(mTabList.size()) - 1);
}

void LLTabContainer::selectNextTab()
{
    if (mTabList.size() == 0)
    {
        return;
    }

    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 LLTabContainer::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 = static_cast<S32>(mTabList.size()) - 1;
    while (!selectTab(idx) && idx != mCurrentTabIdx)
    {
        idx = idx - 1;
        if (idx < 0)
            idx = static_cast<S32>(mTabList.size()) - 1;
    }
    if (tab_has_focus)
    {
        mTabList[idx]->mButton->setFocus(true);
    }
}

bool LLTabContainer::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 LLTabContainer::selectTab(S32 which)
{
    if (which >= getTabCount() || which < 0)
        return false;

    LLTabTuple* selected_tuple = getTab(which);
    if (!selected_tuple)
        return false;

    LLSD cbdata;
    if (selected_tuple->mTabPanel)
        cbdata = selected_tuple->mTabPanel->getName();

    bool result = false;
    if (!mValidateSignal || (*mValidateSignal)(this, cbdata))
    {
        result = setTab(which);
        if (result && mCommitSignal)
        {
            (*mCommitSignal)(this, cbdata);
        }
    }

    return result;
}

// private
bool LLTabContainer::setTab(S32 which)
{
    static LLUICachedControl<S32> tabcntr_arrow_btn_size ("UITabCntrArrowBtnSize", 0);
    LLTabTuple* selected_tuple = getTab(which);
    if (!selected_tuple)
    {
        return false;
    }

    bool is_visible = false;
    if( selected_tuple->mButton->getEnabled() && selected_tuple->mVisible )
    {
        setCurrentPanelIndex(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 );
            // Although the selected tab must be complete, we may have hollow LLTabTuple tucked in the list
            if (tuple && tuple->mButton)
            {
                tuple->mButton->setUseEllipses(mUseTabEllipses);
                tuple->mButton->setHAlign(mFontHalign);
                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 (tuple && tuple->mTabPanel)
            {
                tuple->mTabPanel->setVisible( is_selected );
                //tuple->mTabPanel->setFocus(is_selected); // not clear that we want to do this here.
            }

            if (is_selected)
            {
                LLUIUsage::instance().logPanel(tuple->mTabPanel->getName());

                // Make sure selected tab is within scroll region
                if (mIsVertical)
                {
                    S32 num_visible = getTabCount() - getMaxScrollPos();
                    if( i >= getScrollPos() && i <= getScrollPos() + num_visible)
                    {
                        setCurrentPanelIndex(which);
                        is_visible = true;
                    }
                    else
                    {
                        is_visible = false;
                    }
                }
                else if (!mHideScrollArrows && getMaxScrollPos() > 0)
                {
                    if( i < getScrollPos() )
                    {
                        setScrollPos(i);
                    }
                    else
                    {
                        S32 available_width_with_arrows = getRect().getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + tabcntr_arrow_btn_size  + tabcntr_arrow_btn_size + 1);
                        S32 running_tab_width = (tuple && tuple->mButton ? tuple->mButton->getRect().getWidth() : 0);
                        S32 j = i - 1;
                        S32 min_scroll_pos = i;
                        if (running_tab_width < available_width_with_arrows)
                        {
                            while (j >= 0)
                            {
                                LLTabTuple* other_tuple = getTab(j);
                                running_tab_width += (other_tuple && other_tuple->mButton ? other_tuple->mButton->getRect().getWidth() : 0);
                                if (running_tab_width > available_width_with_arrows)
                                {
                                    break;
                                }
                                j--;
                            }
                            min_scroll_pos = j + 1;
                        }
                        setScrollPos(llclamp(getScrollPos(), min_scroll_pos, i));
                        setScrollPos(llmin(getScrollPos(), getMaxScrollPos()));
                    }
                    is_visible = true;
                }
                else
                {
                    is_visible = true;
                }
            }
            i++;
        }
    }
    if (mIsVertical && getCurrentPanelIndex() >= 0)
    {
        LLTabTuple* tuple = getTab(getCurrentPanelIndex());
        tuple->mTabPanel->setVisible( true );
        tuple->mButton->setToggleState( true );
    }
    return is_visible;
}

bool LLTabContainer::selectTabByName(std::string_view name)
{
    LLPanel* panel = getPanelByName(name);
    if (!panel)
    {
        LL_WARNS() << "LLTabContainer::selectTabByName(" << name << ") failed" << LL_ENDL;
        return false;
    }

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

bool LLTabContainer::getTabPanelFlashing(LLPanel *child)
{
    LLTabTuple* tuple = getTabByPanel(child);
    if( tuple )
    {
        return tuple->mButton->getFlashing();
    }
    return false;
}

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

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

void LLTabContainer::setTabImage(LLPanel* child, const LLUUID& image_id, const LLColor4& color)
{
    LLTabTuple* tuple = getTabByPanel(child);
    if( tuple )
    {
        tuple->mButton->setImageOverlay(image_id, LLFontGL::LEFT, color);
        reshapeTuple(tuple);
    }
}

void LLTabContainer::setTabImage(LLPanel* child, LLIconCtrl* icon)
{
    LLTabTuple* tuple = getTabByPanel(child);
    LLCustomButtonIconCtrl* button;
    bool hasButton = false;

    if(tuple)
    {
        button = dynamic_cast<LLCustomButtonIconCtrl*>(tuple->mButton);
        if(button)
        {
            hasButton = true;
            button->setIcon(icon);
            reshapeTuple(tuple);
        }
    }

    if (!hasButton && (icon != NULL))
    {
        // It was assumed that the tab's button would take ownership of the icon pointer.
        // But since the tab did not have a button, kill the icon to prevent the memory
        // leak.
        icon->die();
    }
}

void LLTabContainer::reshapeTuple(LLTabTuple* tuple)
{
    static LLUICachedControl<S32> tab_padding ("UITabPadding", 0);

    if (!mIsVertical)
    {
        S32 image_overlay_width = 0;

        if(mCustomIconCtrlUsed)
        {
            LLCustomButtonIconCtrl* button = dynamic_cast<LLCustomButtonIconCtrl*>(tuple->mButton);
            LLIconCtrl* icon_ctrl = button ? button->getIconCtrl() : NULL;
            image_overlay_width = icon_ctrl ? icon_ctrl->getRect().getWidth() : 0;
        }
        else
        {
            image_overlay_width = tuple->mButton->getImageOverlay().notNull() ?
                    tuple->mButton->getImageOverlay()->getImage()->getWidth(0) : 0;
        }
        // remove current width from total tab strip width
        mTotalTabWidth -= tuple->mButton->getRect().getWidth();

        tuple->mPadding = image_overlay_width;

        tuple->mButton->reshape(llclamp(mFont->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();
    }
}

void LLTabContainer::setTitle(const std::string& title)
{
    if (mTitleBox)
    {
        mTitleBox->setText( title );
    }
}

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

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

S32 LLTabContainer::getTopBorderHeight() const
{
    return mTopBorderHeight;
}

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

void LLTabContainer::setPanelTitle(S32 index, const std::string& title)
{
    static LLUICachedControl<S32> tab_padding ("UITabPadding", 0);

    if (index >= 0 && index < getTabCount())
    {
        LLTabTuple* tuple = getTab(index);
        LLButton* tab_button = tuple->mButton;
        const LLFontGL* fontp = LLFontGL::getFontSansSerifSmall();
        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::onTabBtn( const LLSD& data, LLPanel* panel )
{
    LLTabTuple* tuple = getTabByPanel(panel);
    selectTabPanel( panel );

    if (tuple)
    {
        tuple->mTabPanel->setFocus(true);
    }
}

void LLTabContainer::onNextBtn( const LLSD& data )
{
    if (!mScrolled)
    {
        scrollNext();
    }
    mScrolled = false;

    if(mCurrentTabIdx < mTabList.size()-1)
    {
        selectNextTab();
    }
}

void LLTabContainer::onNextBtnHeld( const LLSD& data )
{
    if (mScrollTimer.getElapsedTimeF32() > SCROLL_STEP_TIME)
    {
        mScrollTimer.reset();
        scrollNext();

        if(mCurrentTabIdx < mTabList.size()-1)
        {
            selectNextTab();
        }
        mScrolled = true;
    }
}

void LLTabContainer::onPrevBtn( const LLSD& data )
{
    if (!mScrolled)
    {
        scrollPrev();
    }
    mScrolled = false;

    if(mCurrentTabIdx > 0)
    {
        selectPrevTab();
    }
}

void LLTabContainer::onJumpFirstBtn( const LLSD& data )
{
    mScrollPos = 0;
}

void LLTabContainer::onJumpLastBtn( const LLSD& data )
{
    mScrollPos = mMaxScrollPos;
}

void LLTabContainer::onPrevBtnHeld( const LLSD& data )
{
    if (mScrollTimer.getElapsedTimeF32() > SCROLL_STEP_TIME)
    {
        mScrollTimer.reset();
        scrollPrev();

        if(mCurrentTabIdx > 0)
        {
            selectPrevTab();
        }
        mScrolled = true;
    }
}

// private

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

    if (mIsVertical)
    {
        static LLUICachedControl<S32> tabcntrv_arrow_btn_size ("UITabCntrvArrowBtnSize", 0);
        // Left and right scroll arrows (for when there are too many tabs to show all at once).
        S32 btn_top = getRect().getHeight();
        S32 btn_top_lower = getRect().mBottom+tabcntrv_arrow_btn_size;

        LLRect up_arrow_btn_rect;
        up_arrow_btn_rect.setLeftTopAndSize( mMinTabWidth/2 , btn_top, tabcntrv_arrow_btn_size, tabcntrv_arrow_btn_size );

        LLRect down_arrow_btn_rect;
        down_arrow_btn_rect.setLeftTopAndSize( mMinTabWidth/2 , btn_top_lower, tabcntrv_arrow_btn_size, tabcntrv_arrow_btn_size );

        LLButton::Params prev_btn_params;
        prev_btn_params.name(std::string("Up Arrow"));
        prev_btn_params.rect(up_arrow_btn_rect);
        prev_btn_params.follows.flags(FOLLOWS_TOP | FOLLOWS_LEFT);
        prev_btn_params.image_unselected.name("scrollbutton_up_out_blue.tga");
        prev_btn_params.image_selected.name("scrollbutton_up_in_blue.tga");
        prev_btn_params.click_callback.function(boost::bind(&LLTabContainer::onPrevBtn, this, _2));
        mPrevArrowBtn = LLUICtrlFactory::create<LLButton>(prev_btn_params);

        LLButton::Params next_btn_params;
        next_btn_params.name(std::string("Down Arrow"));
        next_btn_params.rect(down_arrow_btn_rect);
        next_btn_params.follows.flags(FOLLOWS_BOTTOM | FOLLOWS_LEFT);
        next_btn_params.image_unselected.name("scrollbutton_down_out_blue.tga");
        next_btn_params.image_selected.name("scrollbutton_down_in_blue.tga");
        next_btn_params.click_callback.function(boost::bind(&LLTabContainer::onNextBtn, this, _2));
        mNextArrowBtn = LLUICtrlFactory::create<LLButton>(next_btn_params);
    }
    else // Horizontal
    {
        static LLUICachedControl<S32> tabcntr_arrow_btn_size ("UITabCntrArrowBtnSize", 0);
        S32 arrow_fudge = 1;        //  match new art better

        // Left and right scroll arrows (for when there are too many tabs to show all at once).
        S32 btn_top = (getTabPosition() == TOP ) ? getRect().getHeight() - getTopBorderHeight() : 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, mTabHeight );

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

        S32 right_pad = tabcntr_arrow_btn_size + LLPANEL_BORDER_WIDTH + 1;

        LLRect right_arrow_btn_rect;
        right_arrow_btn_rect.setLeftTopAndSize( getRect().getWidth() - mRightTabBtnOffset - right_pad - tabcntr_arrow_btn_size,
                                                btn_top + arrow_fudge,
                                                tabcntr_arrow_btn_size, mTabHeight );


        LLRect jump_right_arrow_btn_rect;
        jump_right_arrow_btn_rect.setLeftTopAndSize( getRect().getWidth() - mRightTabBtnOffset - right_pad,
                                                     btn_top + arrow_fudge,
                                                     tabcntr_arrow_btn_size, mTabHeight );

        LLButton::Params p;
        p.name(std::string("Jump Left Arrow"));
        p.image_unselected.name("jump_left_out.tga");
        p.image_selected.name("jump_left_in.tga");
        p.click_callback.function(boost::bind(&LLTabContainer::onJumpFirstBtn, this, _2));
        p.rect(jump_left_arrow_btn_rect);
        p.follows.flags(FOLLOWS_LEFT);

        mJumpPrevArrowBtn = LLUICtrlFactory::create<LLButton>(p);

        p = LLButton::Params();
        p.name(std::string("Left Arrow"));
        p.rect(left_arrow_btn_rect);
        p.follows.flags(FOLLOWS_LEFT);
        p.image_unselected.name("scrollbutton_left_out_blue.tga");
        p.image_selected.name("scrollbutton_left_in_blue.tga");
        p.click_callback.function(boost::bind(&LLTabContainer::onPrevBtn, this, _2));
        p.mouse_held_callback.function(boost::bind(&LLTabContainer::onPrevBtnHeld, this, _2));

        mPrevArrowBtn = LLUICtrlFactory::create<LLButton>(p);

        p = LLButton::Params();
        p.name(std::string("Jump Right Arrow"));
        p.rect(jump_right_arrow_btn_rect);
        p.follows.flags(FOLLOWS_RIGHT);
        p.image_unselected.name("jump_right_out.tga");
        p.image_selected.name("jump_right_in.tga");
        p.click_callback.function(boost::bind(&LLTabContainer::onJumpLastBtn, this, _2));

        mJumpNextArrowBtn = LLUICtrlFactory::create<LLButton>(p);

        p = LLButton::Params();
        p.name(std::string("Right Arrow"));
        p.rect(right_arrow_btn_rect);
        p.follows.flags(FOLLOWS_RIGHT);
        p.image_unselected.name("scrollbutton_right_out_blue.tga");
        p.image_selected.name("scrollbutton_right_in_blue.tga");
        p.click_callback.function(boost::bind(&LLTabContainer::onNextBtn, this, _2));
        p.mouse_held_callback.function(boost::bind(&LLTabContainer::onNextBtnHeld, this, _2));

        mNextArrowBtn = LLUICtrlFactory::create<LLButton>(p);

        if( getTabPosition() == TOP )
        {
            mNextArrowBtn->setFollowsTop();
            mPrevArrowBtn->setFollowsTop();
            mJumpPrevArrowBtn->setFollowsTop();
            mJumpNextArrowBtn->setFollowsTop();
        }
        else
        {
            mNextArrowBtn->setFollowsBottom();
            mPrevArrowBtn->setFollowsBottom();
            mJumpPrevArrowBtn->setFollowsBottom();
            mJumpNextArrowBtn->setFollowsBottom();
        }
    }

    mPrevArrowBtn->setTabStop(false);
    addChild(mPrevArrowBtn);

    mNextArrowBtn->setTabStop(false);
    addChild(mNextArrowBtn);

    if (mJumpPrevArrowBtn)
    {
        mJumpPrevArrowBtn->setTabStop(false);
        addChild(mJumpPrevArrowBtn);
    }

    if (mJumpNextArrowBtn)
    {
        mJumpNextArrowBtn->setTabStop(false);
        addChild(mJumpNextArrowBtn);
    }

    // set default tab group to be panel contents
    setDefaultTabGroup(1);
}

//this is a work around for the current LLPanel::initFromParams hack
//so that it doesn't overwrite the default tab group.
//will be removed when LLPanel is fixed soon.
void LLTabContainer::initFromParams(const LLPanel::Params& p)
{
    LLPanel::initFromParams(p);

    setDefaultTabGroup(1);
}

LLTabTuple* LLTabContainer::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 LLTabContainer::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 LEFT_OF_CURRENT:
        // insert the new tab before the current tab (but not before mLockedTabCount)
        {
        tuple_list_t::iterator current_iter = mTabList.begin() + llmax(mLockedTabCount, mCurrentTabIdx);
        mTabList.insert(current_iter, 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 );
    }
}



void LLTabContainer::updateMaxScrollPos()
{
    static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
    bool no_scroll = true;
    if (mIsVertical)
    {
        S32 tab_total_height = (BTN_HEIGHT + tabcntrv_pad) * getTabCount();
        S32 available_height = getRect().getHeight() - getTopBorderHeight();
        if( tab_total_height > available_height )
        {
            static LLUICachedControl<S32> tabcntrv_arrow_btn_size ("UITabCntrvArrowBtnSize", 0);
            S32 available_height_with_arrows = getRect().getHeight() - 2*(tabcntrv_arrow_btn_size + 3*tabcntrv_pad) - mNextArrowBtn->getRect().mBottom;
            S32 additional_needed = tab_total_height - available_height_with_arrows;
            setMaxScrollPos((S32) ceil(additional_needed / float(BTN_HEIGHT + tabcntrv_pad) ) );
            no_scroll = false;
        }
    }
    else
    {
        static LLUICachedControl<S32> tabcntr_tab_h_pad ("UITabCntrTabHPad", 0);
        static LLUICachedControl<S32> tabcntr_arrow_btn_size ("UITabCntrArrowBtnSize", 0);
        static LLUICachedControl<S32> tabcntr_tab_partial_width ("UITabCntrTabPartialWidth", 0);
        S32 tab_space = 0;
        S32 available_space = 0;
        tab_space = mTotalTabWidth;
        available_space = getRect().getWidth() - mRightTabBtnOffset - 2 * (LLPANEL_BORDER_WIDTH + tabcntr_tab_h_pad);

        if( tab_space > available_space )
        {
            S32 available_width_with_arrows = getRect().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;
            setMaxScrollPos(getTabCount());
            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;
                }
                setMaxScrollPos(getMaxScrollPos()-1);
            }
            // in case last tab doesn't actually fit on screen, make it the last scrolling position
            setMaxScrollPos(llmin(getMaxScrollPos(), getTabCount() - 1));
            no_scroll = false;
        }
    }
    if (no_scroll)
    {
        setMaxScrollPos(0);
        setScrollPos(0);
    }
    if (getScrollPos() > getMaxScrollPos())
    {
        setScrollPos(getMaxScrollPos()); // maybe just enforce this via limits in setScrollPos instead?
    }
}

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

S32 LLTabContainer::getTotalTabWidth() const
{
    return mTotalTabWidth;
}

void LLTabContainer::setTabVisibility( LLPanel const *aPanel, bool aVisible )
{
    for( tuple_list_t::const_iterator itr = mTabList.begin(); itr != mTabList.end(); ++itr )
    {
        LLTabTuple const *pTT = *itr;
        if( pTT->mTabPanel == aPanel )
        {
            pTT->mVisible = aVisible;
            break;
        }
    }

    bool foundTab( false );
    for( tuple_list_t::const_iterator itr = mTabList.begin(); itr != mTabList.end(); ++itr )
    {
        LLTabTuple const *pTT = *itr;
        if( pTT->mVisible )
        {
            this->selectTab((S32)(itr - mTabList.begin()));
            foundTab = true;
            break;
        }
    }

    if( foundTab )
        this->setVisible( true );
    else
        this->setVisible( false );

    updateMaxScrollPos();
}