752d5fa642
detect mouse movement and modifier key changes even when KWin is idle. As the track mouse effect requires polling to always be active disabling it by default to prevent wasting CPU usage in the default install. svn path=/trunk/KDE/kdebase/workspace/; revision=919711
122 lines
3.6 KiB
C++
122 lines
3.6 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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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 "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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, polling( false )
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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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double diff = time / animationTime( 500.0 );
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if( target_zoom > zoom )
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zoom = qMin( zoom * qMax( 1 + diff, 1.2 ), target_zoom );
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else
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zoom = qMax( zoom * qMin( 1 - diff, 0.8 ), 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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if( !polling )
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{
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polling = true;
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effects->startMousePolling();
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}
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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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if( polling )
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{
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polling = false;
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effects->stopMousePolling();
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}
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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,
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Qt::MouseButtons, Qt::KeyboardModifiers, 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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