124 lines
4 KiB
C++
124 lines
4 KiB
C++
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/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
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Copyright (C) 2007 Lubos Lunak <l.lunak@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "taskbarthumbnail.h"
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#include <kdebug.h>
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// This effect shows a preview inside a window that has a special property set
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// on it that says which window and where to render. It is used by the taskbar
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// to show window previews in tooltips.
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namespace KWin
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{
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KWIN_EFFECT( taskbarthumbnail, TaskbarThumbnailEffect )
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TaskbarThumbnailEffect::TaskbarThumbnailEffect()
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{
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atom = XInternAtom( display(), "_KDE_WINDOW_PREVIEW", False );
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effects->registerPropertyType( atom, true );
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// TODO hackish way to announce support, make better after 4.0
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unsigned char dummy = 0;
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XChangeProperty( display(), rootWindow(), atom, atom, 8, PropModeReplace, &dummy, 1 );
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}
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TaskbarThumbnailEffect::~TaskbarThumbnailEffect()
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{
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XDeleteProperty( display(), rootWindow(), atom );
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effects->registerPropertyType( atom, false );
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}
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void TaskbarThumbnailEffect::prePaintScreen( ScreenPrePaintData& data, int time )
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{
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// if( thumbnails.count() > 0 )
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// // TODO this should not be needed (it causes whole screen repaint)
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// data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
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effects->prePaintScreen(data, time);
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}
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void TaskbarThumbnailEffect::prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time )
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{
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// TODO what if of the windows is translucent and one not? change data.mask?
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effects->prePaintWindow( w, data, time );
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}
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void TaskbarThumbnailEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
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{
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effects->paintWindow( w, mask, region, data ); // paint window first
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if( thumbnails.contains( w ))
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{ // paint thumbnails on it
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foreach( const Data thumb, thumbnails.values( w ))
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{
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EffectWindow* thumbw = effects->findWindow( thumb.window );
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WindowPaintData data( thumbw );
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QRect r;
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setPositionTransformations( data, r,
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thumbw, thumb.rect.translated( w->pos()), Qt::KeepAspectRatio );
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effects->drawWindow( thumbw,
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PAINT_WINDOW_OPAQUE | PAINT_WINDOW_TRANSFORMED,
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r, data );
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}
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}
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}
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void TaskbarThumbnailEffect::windowAdded( EffectWindow* w )
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{
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propertyNotify( w, atom ); // read initial value
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}
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void TaskbarThumbnailEffect::windowRemoved( EffectWindow* w )
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{
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thumbnails.remove( w );
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}
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void TaskbarThumbnailEffect::propertyNotify( EffectWindow* w, long a )
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{
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if( a != atom )
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return;
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thumbnails.remove( w );
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QByteArray data = w->readProperty( atom, atom, 32 );
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if( data.length() < 1 )
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return;
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long* d = reinterpret_cast< long* >( data.data());
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int len = data.length() / 4;
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int pos = 0;
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int cnt = d[ 0 ];
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++pos;
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for( int i = 0;
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i < cnt;
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++i )
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{
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int size = d[ pos ];
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if( len - pos < size )
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return; // format error
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++pos;
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Data data;
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data.window = d[ pos ];
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data.rect = QRect( d[ pos + 1 ], d[ pos + 2 ], d[ pos + 3 ], d[ pos + 4 ] );
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thumbnails.insert( w, data );
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pos += size;
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}
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}
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} // namespace
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