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path: root/vcl/unx/kde4/KDESalGraphics.cxx
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org 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 version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"

#define _SV_SALNATIVEWIDGETS_KDE_CXX

#define Region QtXRegion

#include <QStyle>
#include <QStyleOption>
#include <QPainter>
#include <QFrame>
#include <QLabel>

#include <kapplication.h>

#undef Region

#include "KDESalGraphics.hxx"

#include "vcl/settings.hxx"
#include "vcl/decoview.hxx"
#include "rtl/ustrbuf.hxx"

using namespace ::rtl;

/**
  Conversion function between VCL ControlState together with
  ImplControlValue and Qt state flags.
  @param nControlState State of the widget (default, focused, ...) in Native Widget Framework.
  @param aValue Value held by the widget (on, off, ...)
*/
QStyle::State vclStateValue2StateFlag( ControlState nControlState,
    const ImplControlValue& aValue )
{
    QStyle::State nState =
        ( (nControlState & CTRL_STATE_DEFAULT)?  QStyle::State_None:      QStyle::State_None ) |
        ( (nControlState & CTRL_STATE_ENABLED)?  QStyle::State_Enabled:   QStyle::State_None ) |
        ( (nControlState & CTRL_STATE_FOCUSED)?  QStyle::State_HasFocus:  QStyle::State_None ) |
        ( (nControlState & CTRL_STATE_PRESSED)?  QStyle::State_Sunken:    QStyle::State_None ) |
        ( (nControlState & CTRL_STATE_SELECTED)? QStyle::State_Selected : QStyle::State_None ) |
        ( (nControlState & CTRL_STATE_ROLLOVER)? QStyle::State_MouseOver: QStyle::State_None );
        //TODO ( (nControlState & CTRL_STATE_HIDDEN)?   QStyle::State_:   QStyle::State_None ) |

    switch ( aValue.getTristateVal() )
    {
        case BUTTONVALUE_ON:    nState |= QStyle::State_On;       break;
        case BUTTONVALUE_OFF:   nState |= QStyle::State_Off;      break;
        case BUTTONVALUE_MIXED: nState |= QStyle::State_NoChange; break;
        default: break;
    }

    return nState;
}

/**
 Convert VCL Rectangle to QRect.
 @param rControlRegion The Rectangle to convert.
 @return The matching QRect
*/
QRect region2QRect( const Rectangle& rControlRegion )
{
    return QRect(rControlRegion.Left(), rControlRegion.Top(), rControlRegion.GetWidth(), rControlRegion.GetHeight());
}

KDESalGraphics::KDESalGraphics() :
    m_image(0)
{
}

KDESalGraphics::~KDESalGraphics()
{
    if (m_image)
        delete m_image;
}

BOOL KDESalGraphics::IsNativeControlSupported( ControlType type, ControlPart part )
{
    if (type == CTRL_PUSHBUTTON) return true;

    if (type == CTRL_MENUBAR) return true;

    if (type == CTRL_MENU_POPUP) return true;

    if (type == CTRL_EDITBOX) return true;

    if (type == CTRL_COMBOBOX) return true;

    if (type == CTRL_TOOLBAR) return true;

    if (type == CTRL_CHECKBOX) return true;

    if (type == CTRL_LISTBOX) return true;

    if (type == CTRL_LISTNODE) return true;

    if (type == CTRL_FRAME) return true;

    if (type == CTRL_SCROLLBAR) return true;

    if (type == CTRL_WINDOW_BACKGROUND) return true;

    if (type == CTRL_SPINBOX && (part == PART_ENTIRE_CONTROL || part == HAS_BACKGROUND_TEXTURE) ) return true;

    // no spinbuttons for KDE, paint spinbox complete
    //if (type == CTRL_SPINBUTTONS) return true;

    if (type == CTRL_GROUPBOX) return true;

    if (type == CTRL_FIXEDLINE) return true;

    if (type == CTRL_FIXEDBORDER) return true;

    if (type == CTRL_TOOLTIP) return true;

    if (type == CTRL_RADIOBUTTON) return true;

    if (type == CTRL_SLIDER && (part == PART_TRACK_HORZ_AREA || part == PART_TRACK_VERT_AREA) )
        return true;

    return false;

    if ( (type == CTRL_TAB_ITEM) && (part == PART_ENTIRE_CONTROL) ) return true;
    if ( (type == CTRL_TAB_PANE) && (part == PART_ENTIRE_CONTROL) ) return true;
    // no CTRL_TAB_BODY for KDE
    if ( (type == CTRL_PROGRESS)    && (part == PART_ENTIRE_CONTROL) ) return true;

    return false;
}

BOOL KDESalGraphics::hitTestNativeControl( ControlType, ControlPart,
                                           const Rectangle&, const Point&,
                                           BOOL& )
{
    return FALSE;
}

/// helper drawing methods
namespace
{
    void draw( QStyle::ControlElement element, QStyleOption* option, QImage* image, QStyle::State state )
    {
        option->state |= state;
        option->rect = image->rect();

        QPainter painter(image);
        kapp->style()->drawControl(element, option, &painter);
    }

    void draw( QStyle::PrimitiveElement element, QStyleOption* option, QImage* image, QStyle::State state, int nAdjust = 0 )
    {
        option->state |= state;
        option->rect = image->rect();
        if( nAdjust )
            option->rect.adjust( nAdjust, nAdjust, -nAdjust, -nAdjust );

        QPainter painter(image);
        kapp->style()->drawPrimitive(element, option, &painter);
    }

    void draw( QStyle::ComplexControl element, QStyleOptionComplex* option, QImage* image, QStyle::State state )
    {
        option->state |= state;
        option->rect = image->rect();

        QPainter painter(image);
        kapp->style()->drawComplexControl(element, option, &painter);
    }

    int getFrameWidth()
    {
        static int s_nFrameWidth = -1;
        if( s_nFrameWidth < 0 )
        {
            // fill in a default
            s_nFrameWidth = 2;
            QFrame aFrame( NULL );
            aFrame.setFrameRect( QRect(0, 0, 100, 30) );
            aFrame.setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
            aFrame.ensurePolished();
            s_nFrameWidth = aFrame.frameWidth();
        }
        return s_nFrameWidth;
    }

    void lcl_drawFrame(QStyle::PrimitiveElement element, QImage* image, QStyle::State state)
    {
    #if ( QT_VERSION >= QT_VERSION_CHECK( 4, 5, 0 ) )
        QStyleOptionFrameV3 option;
        option.frameShape = QFrame::StyledPanel;
        option.state = QStyle::State_Sunken;
    #else
        QStyleOptionFrame option;

        QFrame aFrame( NULL );
        aFrame.setFrameRect( QRect(0, 0, image->width(), image->height()) );
        aFrame.setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
        aFrame.ensurePolished();

        option.initFrom( &aFrame );
        option.lineWidth = aFrame.lineWidth();
        option.midLineWidth = aFrame.midLineWidth();
    #endif

        draw(element, &option, image, state);
    }
}

BOOL KDESalGraphics::drawNativeControl( ControlType type, ControlPart part,
                                        const Rectangle& rControlRegion, ControlState nControlState,
                                        const ImplControlValue& value,
                                        const OUString& )
{
    // put not implemented types here
    if (type == CTRL_SPINBUTTONS)
    {
        return false;
    }

    BOOL returnVal = true;

    QRect widgetRect = region2QRect(rControlRegion);
    if( type == CTRL_SPINBOX && part == PART_ALL_BUTTONS )
        type = CTRL_SPINBUTTONS;
    if( type == CTRL_SPINBUTTONS )
    {
        OSL_ASSERT( value.getType() != CTRL_SPINBUTTONS );
        const SpinbuttonValue* pSpinVal = static_cast<const SpinbuttonValue *>(&value);
        Rectangle aButtonRect( pSpinVal->maUpperRect);
        aButtonRect.Union( pSpinVal->maLowerRect );;
        widgetRect = QRect( aButtonRect.Left(), aButtonRect.Top(),
                            aButtonRect.Right(), aButtonRect.Bottom() );
    }

    //if no image, or resized, make a new image
    if (!m_image || m_image->size() != widgetRect.size())
    {
        if (m_image)
            delete m_image;

        m_image = new QImage( widgetRect.width(),
                              widgetRect.height(),
                              QImage::Format_ARGB32 );
    }
    m_image->fill(KApplication::palette().color(QPalette::Window).rgb());


    XLIB_Region pTempClipRegion = 0;

    if (type == CTRL_PUSHBUTTON)
    {
        QStyleOptionButton option;
        draw( QStyle::CE_PushButton, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if ( (type == CTRL_MENUBAR))
    {
        if (part == PART_MENU_ITEM)
        {
            QStyleOptionMenuItem option;
            draw( QStyle::CE_MenuBarItem, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
        else if (part == PART_ENTIRE_CONTROL)
        {
        }
        else
        {
            returnVal = false;
        }
    }
    else if (type == CTRL_MENU_POPUP)
    {
        if (part == PART_MENU_ITEM)
        {
            QStyleOptionMenuItem option;
            draw( QStyle::CE_MenuItem, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
        else if (part == PART_MENU_ITEM_CHECK_MARK && (nControlState & CTRL_STATE_PRESSED) )
        {
            QStyleOptionButton option;
            draw( QStyle::PE_IndicatorMenuCheckMark, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
        else if (part == PART_MENU_ITEM_RADIO_MARK && (nControlState & CTRL_STATE_PRESSED) )
        {
            QStyleOptionButton option;
            draw( QStyle::PE_IndicatorRadioButton, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
        else
        {
            #if ( QT_VERSION >= QT_VERSION_CHECK( 4, 5, 0 ) )
            QStyleOptionFrameV3 option;
            option.frameShape = QFrame::StyledPanel;
            #else
            QStyleOptionFrameV2 option;
            #endif
            draw( QStyle::PE_FrameMenu, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
    }
    else if ( (type == CTRL_TOOLBAR) && (part == PART_BUTTON) )
    {
        QStyleOptionToolButton option;

        option.arrowType = Qt::NoArrow;
        option.subControls = QStyle::SC_ToolButton;

        option.state = vclStateValue2StateFlag( nControlState, value );
        option.state |= QStyle::State_Raised | QStyle::State_Enabled | QStyle::State_AutoRaise;

        draw( QStyle::CC_ToolButton, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if ( (type == CTRL_TOOLBAR) && (part == PART_ENTIRE_CONTROL) )
    {
        QStyleOptionToolBar option;

        option.rect = QRect(0, 0, widgetRect.width(), widgetRect.height());
        option.state = vclStateValue2StateFlag( nControlState, value );

        draw( QStyle::CE_ToolBar, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if ( (type == CTRL_TOOLBAR) && (part == PART_THUMB_VERT) )
    {
        const int tw = widgetRect.width();
        widgetRect.setWidth(kapp->style()->pixelMetric(QStyle::PM_ToolBarHandleExtent));

        QStyleOption option;
        option.state = QStyle::State_Horizontal;

        draw( QStyle::PE_IndicatorToolBarHandle, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );

        widgetRect.setWidth(tw);
    }
    else if (type == CTRL_EDITBOX)
    {
        QStyleOptionFrameV2 option;
        draw( QStyle::PE_PanelLineEdit, &option, m_image,
              vclStateValue2StateFlag(nControlState, value), 2 );

        draw( QStyle::PE_FrameLineEdit, &option, m_image,
              vclStateValue2StateFlag(nControlState, value), 0 );
    }
    else if (type == CTRL_COMBOBOX)
    {
        QStyleOptionComboBox option;
        option.editable = true;

        draw( QStyle::CC_ComboBox, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_LISTBOX)
    {
        if( part == PART_WINDOW )
        {
            lcl_drawFrame( QStyle::PE_Frame, m_image,
                           vclStateValue2StateFlag(nControlState, value) );
        }
        else
        {
            QStyleOptionComboBox option;
            if (part == PART_SUB_EDIT)
            {
                draw( QStyle::CE_ComboBoxLabel, &option, m_image,
                      vclStateValue2StateFlag(nControlState, value) );
            }
            else
            {
                draw( QStyle::CC_ComboBox, &option, m_image,
                      vclStateValue2StateFlag(nControlState, value) );
            }
        }
    }
    else if (type == CTRL_LISTNODE)
    {
        QStyleOption option;
        option.state = QStyle::State_Item | QStyle::State_Children;

        if (nControlState & CTRL_STATE_PRESSED)
            option.state |= QStyle::State_Open;

        draw( QStyle::PE_IndicatorBranch, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_CHECKBOX)
    {
        QStyleOptionButton option;
        draw( QStyle::CE_CheckBox, &option, m_image,
               vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_SCROLLBAR)
    {
        if ((part == PART_DRAW_BACKGROUND_VERT) || (part == PART_DRAW_BACKGROUND_HORZ))
        {
            QStyleOptionSlider option;
            OSL_ASSERT( value.getType() == CTRL_SCROLLBAR );
            const ScrollbarValue* sbVal = static_cast<const ScrollbarValue *>(&value);

            //if the scroll bar is active (aka not degenrate...allow for hover events
            if (sbVal->mnVisibleSize < sbVal->mnMax)
                option.state = QStyle::State_MouseOver;

            //horizontal or vertical
            if (part == PART_DRAW_BACKGROUND_VERT)
                option.orientation = Qt::Vertical;
            else
                option.state |= QStyle::State_Horizontal;

            //setup parameters from the OO values
            option.minimum = sbVal->mnMin;
            option.maximum = sbVal->mnMax - sbVal->mnVisibleSize;
            option.sliderValue = sbVal->mnCur;
            option.sliderPosition = sbVal->mnCur;
            option.pageStep = sbVal->mnVisibleSize;

            //setup the active control...always the slider
            if (sbVal->mnThumbState & CTRL_STATE_ROLLOVER)
                option.activeSubControls = QStyle::SC_ScrollBarSlider;

            draw( QStyle::CC_ScrollBar, &option, m_image,
                  vclStateValue2StateFlag(nControlState, value) );
        }
        else
        {
            returnVal = false;
        }
    }
    else if (type == CTRL_SPINBOX)
    {
        QStyleOptionSpinBox option;

        // determine active control
        if( value.getType() == CTRL_SPINBUTTONS )
        {
            const SpinbuttonValue* pSpinVal = static_cast<const SpinbuttonValue *>(&value);
            if( (pSpinVal->mnUpperState & CTRL_STATE_PRESSED) )
                option.activeSubControls |= QStyle::SC_SpinBoxUp;
            if( (pSpinVal->mnLowerState & CTRL_STATE_PRESSED) )
                option.activeSubControls |= QStyle::SC_SpinBoxDown;
        }

        draw( QStyle::CC_SpinBox, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_GROUPBOX)
    {
        QStyleOptionGroupBox option;
        draw( QStyle::CC_GroupBox, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_RADIOBUTTON)
    {
        QStyleOptionButton option;
        draw( QStyle::CE_RadioButton, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_TOOLTIP)
    {
        QStyleOption option;
        draw( QStyle::PE_PanelTipLabel, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_FRAME)
    {
        lcl_drawFrame( QStyle::PE_Frame, m_image,
                       vclStateValue2StateFlag(nControlState, value) );

        // draw just the border, see http://qa.openoffice.org/issues/show_bug.cgi?id=107945
        int nFrameWidth = getFrameWidth();
        pTempClipRegion = XCreateRegion();
        XRectangle xRect = { widgetRect.left(), widgetRect.top(), widgetRect.width(), widgetRect.height() };
        XUnionRectWithRegion( &xRect, pTempClipRegion, pTempClipRegion );
        xRect.x += nFrameWidth;
        xRect.y += nFrameWidth;

        // do not crash for too small widgets, see http://qa.openoffice.org/issues/show_bug.cgi?id=112102
        if( xRect.width > 2*nFrameWidth && xRect.height > 2*nFrameWidth )
        {
            xRect.width -= 2*nFrameWidth;
            xRect.height -= 2*nFrameWidth;

            XLIB_Region pSubtract = XCreateRegion();
            XUnionRectWithRegion( &xRect, pSubtract, pSubtract );
            XSubtractRegion( pTempClipRegion, pSubtract, pTempClipRegion );
            XDestroyRegion( pSubtract );
        }
    }
    else if (type == CTRL_FIXEDBORDER)
    {
        lcl_drawFrame( QStyle::PE_FrameWindow, m_image,
                       vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_WINDOW_BACKGROUND)
    {
        m_image->fill(KApplication::palette().color(QPalette::Window).rgb());
    }
    else if (type == CTRL_FIXEDLINE)
    {
        QStyleOptionMenuItem option;
        option.menuItemType = QStyleOptionMenuItem::Separator;
        option.state |= QStyle::State_Item;

        draw( QStyle::CE_MenuItem, &option, m_image,
              vclStateValue2StateFlag(nControlState, value) );
    }
    else if (type == CTRL_SLIDER && (part == PART_TRACK_HORZ_AREA || part == PART_TRACK_VERT_AREA))
    {
        OSL_ASSERT( value.getType() == CTRL_SLIDER );
        const SliderValue* slVal = static_cast<const SliderValue *>(&value);
        QStyleOptionSlider option;

        option.rect = QRect(0, 0, widgetRect.width(), widgetRect.height());
        option.state = vclStateValue2StateFlag( nControlState, value );
        option.maximum     = slVal->mnMax;
        option.minimum     = slVal->mnMin;
        option.sliderPosition = option.sliderValue = slVal->mnCur;
        option.orientation = (part == PART_TRACK_HORZ_AREA) ? Qt::Horizontal : Qt::Vertical;

        draw( QStyle::CC_Slider, &option, m_image, vclStateValue2StateFlag(nControlState, value) );
    }
    else
    {
        returnVal = false;
    }

    if (returnVal)
    {
        GC gc = SelectFont();

        if( gc )
        {
            if( pTempClipRegion )
            {
                if( pClipRegion_ )
                    XIntersectRegion( pTempClipRegion, pClipRegion_, pTempClipRegion );
                XSetRegion( GetXDisplay(), gc, pTempClipRegion );
            }
            QPixmap pixmap = QPixmap::fromImage(*m_image, Qt::ColorOnly | Qt::OrderedDither | Qt::OrderedAlphaDither);
            X11SalGraphics::CopyScreenArea( GetXDisplay(),
                pixmap.handle(), pixmap.x11Info().screen(), pixmap.x11Info().depth(),
                GetDrawable(), GetScreenNumber(), GetVisual().GetDepth(),
                gc, 0, 0, widgetRect.width(), widgetRect.height(), widgetRect.left(), widgetRect.top());

            if( pTempClipRegion )
            {
                if( pClipRegion_ )
                    XSetRegion( GetXDisplay(), gc, pClipRegion_ );
                else
                    XSetClipMask( GetXDisplay(), gc, None );
            }
        }
        else
            returnVal = false;
    }
    if( pTempClipRegion )
        XDestroyRegion( pTempClipRegion );

    return returnVal;
}

BOOL KDESalGraphics::getNativeControlRegion( ControlType type, ControlPart part,
                                             const Rectangle& controlRegion, ControlState controlState,
                                             const ImplControlValue& val,
                                             const OUString&,
                                             Rectangle &nativeBoundingRegion, Rectangle &nativeContentRegion )
{
    bool retVal = false;

    QRect boundingRect = region2QRect( controlRegion );
    QRect contentRect = boundingRect;
    QStyleOptionComplex styleOption;

    switch ( type )
    {
        // Metrics of the push button
        case CTRL_PUSHBUTTON:
            if (part == PART_ENTIRE_CONTROL)
            {
                styleOption.state = vclStateValue2StateFlag(controlState, val);

                if ( controlState & CTRL_STATE_DEFAULT )
                {
                    int size = kapp->style()->pixelMetric(
                        QStyle::PM_ButtonDefaultIndicator, &styleOption );

                    boundingRect.adjust( -size, -size, size, size );

                    retVal = true;
                }
            }
            break;
        case CTRL_EDITBOX:
        {
            int nFontHeight    = kapp->fontMetrics().height();
            //int nFrameSize     = kapp->style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
            int nLayoutTop     = kapp->style()->pixelMetric(QStyle::PM_LayoutTopMargin);
            int nLayoutBottom  = kapp->style()->pixelMetric(QStyle::PM_LayoutBottomMargin);
            int nLayoutLeft    = kapp->style()->pixelMetric(QStyle::PM_LayoutLeftMargin);
            int nLayoutRight   = kapp->style()->pixelMetric(QStyle::PM_LayoutRightMargin);

            int nMinHeight = (nFontHeight + nLayoutTop + nLayoutBottom);
            if( boundingRect.height() < nMinHeight )
            {
                int delta = nMinHeight - boundingRect.height();
                boundingRect.adjust( 0, 0, 0, delta );
            }
            contentRect = boundingRect;
            contentRect.adjust( -nLayoutLeft+1, -nLayoutTop+1, nLayoutRight-1, nLayoutBottom-1 );
            retVal = true;

            break;
        }
        case CTRL_CHECKBOX:
            if (part == PART_ENTIRE_CONTROL)
            {
                styleOption.state = vclStateValue2StateFlag(controlState, val);

                contentRect.setWidth(kapp->style()->pixelMetric(
                    QStyle::PM_IndicatorWidth, &styleOption));
                contentRect.setHeight(kapp->style()->pixelMetric(
                    QStyle::PM_IndicatorHeight, &styleOption));

                contentRect.adjust(0, 0,
                    2 * kapp->style()->pixelMetric(
                        QStyle::PM_FocusFrameHMargin, &styleOption),
                    2 * kapp->style()->pixelMetric(
                        QStyle::PM_FocusFrameVMargin, &styleOption)
                    );

                boundingRect = contentRect;

                retVal = true;

                break;
            }
        case CTRL_COMBOBOX:
        case CTRL_LISTBOX:
        {
            QStyleOptionComboBox cbo;

            cbo.rect = QRect(0, 0, contentRect.width(), contentRect.height());
            cbo.state = vclStateValue2StateFlag(controlState, val);

            switch ( part )
            {
                case PART_ENTIRE_CONTROL:
                {
                    int size = kapp->style()->pixelMetric(QStyle::PM_ComboBoxFrameWidth) - 2;

                    // find out the minimum size that should be used
                    // assume contents is a text ling
                    int nHeight = kapp->fontMetrics().height();
                    QSize aContentSize( contentRect.width(), nHeight );
                    QSize aMinSize = kapp->style()->
                        sizeFromContents( QStyle::CT_ComboBox, &cbo, aContentSize );
                    if( aMinSize.height() > contentRect.height() )
                        contentRect.adjust( 0, 0, 0, aMinSize.height() - contentRect.height() );
                    boundingRect = contentRect;
                    // FIXME: why this difference between comboboxes and listboxes ?
                    // because a combobox has a sub edit and that is positioned
                    // inside the outer bordered control ?
                    if( type == CTRL_COMBOBOX )
                        contentRect.adjust(-size,-size,size,size);
                    retVal = true;
                    break;
                }
                case PART_BUTTON_DOWN:
                    //the entire control can be used as the "down" button
                    retVal = true;
                    break;
                case PART_SUB_EDIT:
                    contentRect = kapp->style()->subControlRect(
                        QStyle::CC_ComboBox, &cbo, QStyle::SC_ComboBoxEditField );

                    contentRect.translate( boundingRect.left(), boundingRect.top() );

                    retVal = true;
                    break;
                case PART_WINDOW:
                    retVal = true;
                    break;
            }
            break;
        }
        case CTRL_SPINBOX:
        {
            QStyleOptionSpinBox sbo;

            sbo.rect = QRect(0, 0, contentRect.width(), contentRect.height());
            sbo.state = vclStateValue2StateFlag(controlState, val);

            switch ( part )
            {
                case PART_BUTTON_UP:
                    contentRect = kapp->style()->subControlRect(
                        QStyle::CC_SpinBox, &sbo, QStyle::SC_SpinBoxUp );
                    contentRect.translate( boundingRect.left(), boundingRect.top() );
                    retVal = true;
                    boundingRect = QRect();
                    break;

                case PART_BUTTON_DOWN:
                    contentRect = kapp->style()->subControlRect(
                        QStyle::CC_SpinBox, &sbo, QStyle::SC_SpinBoxDown );
                    retVal = true;
                    contentRect.translate( boundingRect.left(), boundingRect.top() );
                    boundingRect = QRect();
                    break;

                case PART_SUB_EDIT:
                    contentRect = kapp->style()->subControlRect(
                        QStyle::CC_SpinBox, &sbo, QStyle::SC_SpinBoxEditField );
                    retVal = true;
                    contentRect.translate( boundingRect.left(), boundingRect.top() );
                    break;
                default:
                    retVal = true;
            }
            break;
        }
        case CTRL_MENU_POPUP:
            //just limit the widget of the menu items
            //OO isn't very flexible in all reguards with the menu
            //so we do the best we can
            if (part == PART_MENU_ITEM_CHECK_MARK)
            {
                contentRect.setWidth(contentRect.height());
                retVal = true;
            }
            else if (part == PART_MENU_ITEM_RADIO_MARK)
            {
                contentRect.setWidth(contentRect.height());
                retVal = true;
            }
            break;
        case CTRL_FRAME:
        {
            if( part == PART_BORDER )
            {
                int nFrameWidth = getFrameWidth();
                USHORT nStyle = val.getNumericVal();
                if( nStyle & FRAME_DRAW_NODRAW )
                {
                    // in this case the question is: how thick would a frame be
                    // see brdwin.cxx, decoview.cxx
                    // most probably the behavior in decoview.cxx is wrong.
                    contentRect.adjust(nFrameWidth, nFrameWidth, -nFrameWidth, -nFrameWidth);
                }
                retVal = true;
            }
            break;
        }
        case CTRL_RADIOBUTTON:
        {
            const int h = kapp->style()->pixelMetric(QStyle::PM_ExclusiveIndicatorHeight);
            const int w = kapp->style()->pixelMetric(QStyle::PM_ExclusiveIndicatorWidth);

            contentRect = QRect(boundingRect.left(), boundingRect.top(), w, h);
            contentRect.adjust(0, 0,
                2 * kapp->style()->pixelMetric(
                    QStyle::PM_FocusFrameHMargin, &styleOption),
                2 * kapp->style()->pixelMetric(
                    QStyle::PM_FocusFrameVMargin, &styleOption)
                );
            boundingRect = contentRect;

            retVal = true;
            break;
        }
        case CTRL_SLIDER:
        {
            const int w = kapp->style()->pixelMetric(QStyle::PM_SliderLength);
            if( part == PART_THUMB_HORZ )
            {
                contentRect = QRect(boundingRect.left(), boundingRect.top(), w, boundingRect.height());
                boundingRect = contentRect;
                retVal = true;
            }
            else if( part == PART_THUMB_VERT )
            {
                contentRect = QRect(boundingRect.left(), boundingRect.top(), boundingRect.width(), w);
                boundingRect = contentRect;
                retVal = true;
            }
            break;
        }
        default:
            break;
    }
    if (retVal)
    {
        // Bounding region
        Point aBPoint( boundingRect.x(), boundingRect.y() );
        Size aBSize( boundingRect.width(), boundingRect.height() );
        nativeBoundingRegion = Rectangle( aBPoint, aBSize );

        // Region of the content
        Point aPoint( contentRect.x(), contentRect.y() );
        Size  aSize( contentRect.width(), contentRect.height() );
        nativeContentRegion = Rectangle( aPoint, aSize );
    }

    return retVal;
}

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