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100 lines
2.8 KiB
100 lines
2.8 KiB
/***************************************************************** |
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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 <kaction.h> |
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#include <kactioncollection.h> |
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#include <kstandardaction.h> |
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namespace KWin |
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{ |
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KWIN_EFFECT( zoom, ZoomEffect ) |
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ZoomEffect::ZoomEffect() |
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: zoom( 1 ) |
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, target_zoom( 1 ) |
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{ |
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KActionCollection* actionCollection = new KActionCollection( this ); |
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KAction* a; |
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomIn, this, SLOT( zoomIn()))); |
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Equal)); |
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ZoomOut, this, SLOT( zoomOut()))); |
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_Minus)); |
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a = static_cast< KAction* >( actionCollection->addAction( KStandardAction::ActualSize, this, SLOT( actualSize()))); |
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0)); |
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} |
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void ZoomEffect::prePaintScreen( ScreenPrePaintData& data, int time ) |
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{ |
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if( zoom != target_zoom ) |
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{ |
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float diff = time / 500.0; |
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if( target_zoom > zoom ) |
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zoom = qMin( zoom * qMax( 1 + diff, 1.2f ), target_zoom ); |
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else |
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zoom = qMax( zoom * qMin( 1 - diff, 0.8f ), target_zoom ); |
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} |
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if( zoom != 1.0 ) |
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data.mask |= PAINT_SCREEN_TRANSFORMED; |
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effects->prePaintScreen( data, 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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effects->addRepaintFull(); |
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effects->postPaintScreen(); |
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} |
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void ZoomEffect::zoomIn() |
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{ |
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target_zoom *= 1.2; |
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effects->addRepaintFull(); |
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} |
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void ZoomEffect::zoomOut() |
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{ |
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target_zoom /= 1.2; |
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if( target_zoom < 1 ) |
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target_zoom = 1; |
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effects->addRepaintFull(); |
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} |
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void ZoomEffect::actualSize() |
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{ |
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target_zoom = 1; |
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effects->addRepaintFull(); |
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} |
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void ZoomEffect::mouseChanged( const QPoint& pos, const QPoint& old, Qt::MouseButtons, Qt::KeyboardModifiers ) |
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{ |
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if( pos != old && zoom != 1 ) |
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effects->addRepaintFull(); |
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} |
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} // namespace |
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#include "zoom.moc"
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