101 lines
2.8 KiB
C++
101 lines
2.8 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 <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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