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Viewing changes to kwin/effects/fadedesktop/fadedesktop.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Michał Zając
  • Date: 2011-07-09 08:31:15 UTC
  • Revision ID: james.westby@ubuntu.com-20110709083115-ohyxn6z93mily9fc
Tags: upstream-4.6.90
Import upstream version 4.6.90

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kwin/effects/fadedesktop/fadedesktop.cpp
 
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/********************************************************************
 
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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) 2009 Lucas Murray <lmurray@undefinedfire.com>
 
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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 "fadedesktop.h"
 
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#include <math.h>
 
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namespace KWin
 
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{
 
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KWIN_EFFECT(fadedesktop, FadeDesktopEffect)
 
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FadeDesktopEffect::FadeDesktopEffect()
 
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    : m_fading(false)
 
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{
 
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    connect(effects, SIGNAL(desktopChanged(int,int)), this, SLOT(slotDesktopChanged(int)));
 
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    m_timeline.setCurveShape(QTimeLine::LinearCurve);
 
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    reconfigure(ReconfigureAll);
 
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}
 
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void FadeDesktopEffect::reconfigure(ReconfigureFlags)
 
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{
 
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    m_timeline.setDuration(animationTime(250));
 
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}
 
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void FadeDesktopEffect::prePaintScreen(ScreenPrePaintData &data, int time)
 
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{
 
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    if (m_fading) {
 
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        m_timeline.setCurrentTime(m_timeline.currentTime() + time);
 
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        // PAINT_SCREEN_BACKGROUND_FIRST is needed because screen will be actually painted more than once,
 
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        // so with normal screen painting second screen paint would erase parts of the first paint
 
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        if (m_timeline.currentValue() != 1.0)
 
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            data.mask |= PAINT_SCREEN_TRANSFORMED | PAINT_SCREEN_BACKGROUND_FIRST;
 
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        else {
 
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            m_fading = false;
 
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            m_timeline.setCurrentTime(0);
 
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            foreach (EffectWindow * w, effects->stackingOrder()) {
 
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                w->setData(WindowForceBlurRole, QVariant(false));
 
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            }
 
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            effects->setActiveFullScreenEffect(NULL);
 
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        }
 
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    }
 
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    effects->prePaintScreen(data, time);
 
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}
 
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void FadeDesktopEffect::postPaintScreen()
 
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{
 
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    if (m_fading)
 
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        effects->addRepaintFull();
 
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    effects->postPaintScreen();
 
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}
 
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void FadeDesktopEffect::prePaintWindow(EffectWindow *w, WindowPrePaintData &data, int time)
 
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{
 
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    if (m_fading) {
 
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        if (w->isOnDesktop(m_oldDesktop))
 
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            w->enablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
 
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        data.setTranslucent();
 
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    }
 
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    effects->prePaintWindow(w, data, time);
 
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}
 
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void FadeDesktopEffect::paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
 
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{
 
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    if (m_fading && !(w->isOnCurrentDesktop() && w->isOnDesktop(m_oldDesktop))) {
 
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        if (w->isOnDesktop(m_oldDesktop))
 
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            data.opacity *= 1 - m_timeline.currentValue();
 
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        else
 
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            data.opacity *= m_timeline.currentValue();
 
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    }
 
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    effects->paintWindow(w, mask, region, data);
 
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}
 
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void FadeDesktopEffect::slotDesktopChanged(int old)
 
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{
 
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    if (effects->activeFullScreenEffect() && effects->activeFullScreenEffect() != this)
 
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        return;
 
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    // TODO: Fix glitches when fading while a previous fade is still happening
 
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    effects->setActiveFullScreenEffect(this);
 
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    m_fading = true;
 
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    m_timeline.setCurrentTime(0);
 
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    m_oldDesktop = old;
 
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    foreach (EffectWindow * w, effects->stackingOrder()) {
 
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        w->setData(WindowForceBlurRole, QVariant(true));
 
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    }
 
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    effects->addRepaintFull();
 
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}
 
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} // namespace
 
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#include "fadedesktop.moc"