60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
/*****************************************************************
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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) 2006 Lubos Lunak <l.lunak@kde.org>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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#include "zoom.h"
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#include <workspace.h>
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namespace KWinInternal
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{
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ZoomEffect::ZoomEffect()
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: zoom( 1 )
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, target_zoom( 2 )
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{
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}
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void ZoomEffect::prePaintScreen( int* mask, QRegion* region, int time )
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{
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if( zoom != target_zoom )
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{
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double diff = time / 500.0;
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if( target_zoom > zoom )
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zoom = qMin( zoom + diff, target_zoom );
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else
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zoom = qMax( zoom - diff, target_zoom );
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}
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if( zoom != 1.0 )
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*mask |= Scene::PAINT_SCREEN_TRANSFORMED;
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effects->prePaintScreen( mask, region, time );
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}
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void ZoomEffect::paintScreen( int mask, QRegion region, ScreenPaintData& data )
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{
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if( zoom != 1.0 )
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{
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data.xScale *= zoom;
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data.yScale *= zoom;
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QPoint cursor = cursorPos();
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// set the position so that the cursor is in the same position in the scaled view
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data.xTranslate = - int( cursor.x() * ( zoom - 1 ));
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data.yTranslate = - int( cursor.y() * ( zoom - 1 ));
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}
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effects->paintScreen( mask, region, data );
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}
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void ZoomEffect::postPaintScreen()
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{
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if( zoom != target_zoom )
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workspace()->addDamageFull();
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effects->postPaintScreen();
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}
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} // namespace
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