113 lines
3.4 KiB
C++
113 lines
3.4 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) 2007 Rivo Laks <rivolaks@hot.ee>
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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 "lookingglass.h"
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#include <kwinglutils.h>
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#include <kactioncollection.h>
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#include <kaction.h>
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#include <klocale.h>
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#include <kdebug.h>
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namespace KWin
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{
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KWIN_EFFECT( lookingglass, LookingGlassEffect )
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KWIN_EFFECT_SUPPORTED( lookingglass, ShaderEffect::supported() )
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LookingGlassEffect::LookingGlassEffect() : QObject(), ShaderEffect("lookingglass")
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{
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zoom = 1.0f;
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target_zoom = 1.0f;
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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_Plus));
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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( toggle())));
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a->setGlobalShortcut(KShortcut(Qt::META + Qt::Key_0));
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radius = 200; // TODO config option
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}
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void LookingGlassEffect::toggle()
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{
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if( target_zoom == 1.0f )
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target_zoom = 2.0f;
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else
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target_zoom = 1.0f;
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setEnabled( true );
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}
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void LookingGlassEffect::zoomIn()
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{
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target_zoom = qMin(7.0f, target_zoom + 0.5f);
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setEnabled( true );
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effects->addRepaint( cursorPos().x() - radius, cursorPos().y() - radius, 2*radius, 2*radius );
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}
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void LookingGlassEffect::zoomOut()
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{
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target_zoom -= 0.5;
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if( target_zoom < 1 )
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{
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target_zoom = 1;
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setEnabled( false );
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}
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effects->addRepaint( cursorPos().x() - radius, cursorPos().y() - radius, 2*radius, 2*radius );
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}
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void LookingGlassEffect::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 / 500.0f;
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if( target_zoom > zoom )
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zoom = qMin( zoom * qMax( 1.0f + diff, 1.2f ), target_zoom );
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else
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zoom = qMax( zoom * qMin( 1.0f - diff, 0.8f ), target_zoom );
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kDebug() << "zoom is now " << zoom;
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radius = qBound(200.0f, 200.0f * zoom, 500.0f);
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if( zoom > 1.0f )
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{
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shader()->bind();
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shader()->setUniform("zoom", zoom);
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shader()->setUniform("radius", (float)radius);
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shader()->unbind();
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}
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else
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{
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setEnabled( false );
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}
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effects->addRepaint( cursorPos().x() - radius, cursorPos().y() - radius, 2*radius, 2*radius );
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}
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ShaderEffect::prePaintScreen( data, time );
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}
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void LookingGlassEffect::mouseChanged( const QPoint& pos, const QPoint& old, Qt::MouseButtons, Qt::KeyboardModifiers )
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{
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if( pos != old && isEnabled() )
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{
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effects->addRepaint( pos.x() - radius, pos.y() - radius, 2*radius, 2*radius );
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effects->addRepaint( old.x() - radius, old.y() - radius, 2*radius, 2*radius );
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}
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}
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} // namespace
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#include "lookingglass.moc"
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