/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include "PanelTitleBar.hxx"
#include "sfx2/sfxresid.hxx"
#include "Sidebar.hrc"

#include "Paint.hxx"
#include "Panel.hxx"
#include "sfx2/sidebar/Theme.hxx"

#include <tools/svborder.hxx>
#include <vcl/gradient.hxx>
#include <vcl/image.hxx>

#ifdef DEBUG
#include "sfx2/sidebar/Tools.hxx"
#endif


namespace sfx2 { namespace sidebar {


static const sal_Int32 gaLeftIconPadding (5);
static const sal_Int32 gaRightIconPadding (5);


PanelTitleBar::PanelTitleBar (
    const ::rtl::OUString& rsTitle,
    Window* pParentWindow,
    Panel* pPanel )
    : TitleBar(rsTitle, pParentWindow, GetBackgroundPaint()),
      mbIsLeftButtonDown(false),
      mpPanel(pPanel),
      mnMenuItemIndex(1),
      maMenuAction()
{
    OSL_ASSERT(mpPanel != NULL);

#ifdef DEBUG
    SetText(A2S("PanelTitleBar"));
#endif
}




PanelTitleBar::~PanelTitleBar (void)
{
}




void PanelTitleBar::SetMenuAction ( const ::boost::function<void(void)>& rMenuAction )
{
    if ( !maMenuAction && rMenuAction )
    {
        maToolBox.InsertItem(
            mnMenuItemIndex,
            Theme::GetImage(Theme::Image_PanelMenu));
        maToolBox.SetOutStyle(TOOLBOX_STYLE_FLAT);
        maToolBox.SetQuickHelpText(
            mnMenuItemIndex,
            String(SfxResId(SFX_STR_SIDEBAR_MORE_OPTIONS)));
    }
    else if ( maMenuAction && !rMenuAction )
    {
        maToolBox.RemoveItem( maToolBox.GetItemPos( mnMenuItemIndex ) );
    }
    maMenuAction = rMenuAction;
}




Rectangle PanelTitleBar::GetTitleArea (const Rectangle& rTitleBarBox)
{
    if (mpPanel != NULL)
    {
        Image aImage (mpPanel->IsExpanded()
            ? Theme::GetImage(Theme::Image_Expand)
            : Theme::GetImage(Theme::Image_Collapse));
        return Rectangle(
            aImage.GetSizePixel().Width() + gaLeftIconPadding + gaRightIconPadding,
            rTitleBarBox.Top(),
            rTitleBarBox.Right(),
            rTitleBarBox.Bottom());
    }
    else
        return rTitleBarBox;
}




void PanelTitleBar::PaintDecoration (const Rectangle& rTitleBarBox)
{
    (void)rTitleBarBox;

    if (mpPanel != NULL)
    {
        Image aImage (mpPanel->IsExpanded()
            ? Theme::GetImage(Theme::Image_Collapse)
            : Theme::GetImage(Theme::Image_Expand));
        const Point aTopLeft (
            gaLeftIconPadding,
            (GetSizePixel().Height()-aImage.GetSizePixel().Height())/2);
        DrawImage(aTopLeft, aImage);
    }
}




Paint PanelTitleBar::GetBackgroundPaint (void)
{
    return Theme::GetPaint(Theme::Paint_PanelTitleBarBackground);
}




Color PanelTitleBar::GetTextColor (void)
{
    return Theme::GetColor(Theme::Color_PanelTitleFont);
}




void PanelTitleBar::HandleToolBoxItemClick (const sal_uInt16 nItemIndex)
{
    if (nItemIndex == mnMenuItemIndex)
        if (maMenuAction)
            maMenuAction();
}




void PanelTitleBar::MouseButtonDown (const MouseEvent& rMouseEvent)
{
    if (rMouseEvent.IsLeft())
    {
        mbIsLeftButtonDown = true;
        CaptureMouse();
    }
}




void PanelTitleBar::MouseButtonUp (const MouseEvent& rMouseEvent)
{
    if (IsMouseCaptured())
        ReleaseMouse();

    if (rMouseEvent.IsLeft())
    {
        if (mbIsLeftButtonDown)
        {
            if (mpPanel != NULL)
            {
                mpPanel->SetExpanded( ! mpPanel->IsExpanded());
                Invalidate();
            }
        }
    }
    if (mbIsLeftButtonDown)
        mbIsLeftButtonDown = false;
}




void PanelTitleBar::DataChanged (const DataChangedEvent& rEvent)
{
    maToolBox.SetItemImage(
        mnMenuItemIndex,
        Theme::GetImage(Theme::Image_PanelMenu));
    TitleBar::DataChanged(rEvent);
}

} } // end of namespace sfx2::sidebar