kwin/effects/_test/demo_shiftworkspaceup.cpp

/*****************************************************************
 KWin - the KDE window manager
 This file is part of the KDE project.

Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>

You can Freely distribute this program under the GNU General Public
License. See the file "COPYING" for the exact licensing terms.
******************************************************************/

#include "demo_shiftworkspaceup.h"

namespace KWin
{

KWIN_EFFECT(demo_shiftworkspaceup, ShiftWorkspaceUpEffect)

ShiftWorkspaceUpEffect::ShiftWorkspaceUpEffect()
    : up(false)
    , diff(0)
{
    connect(&timer, SIGNAL(timeout()), SLOT(tick()));
    timer.start(2000);
}

void ShiftWorkspaceUpEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
    if (up && diff < 1000)
        diff = qBound(0, diff + time, 1000);   // KDE3: note this differs from KCLAMP
    if (!up && diff > 0)
        diff = qBound(0, diff - time, 1000);
    if (diff != 0)
        data.mask |= PAINT_SCREEN_TRANSFORMED;
    effects->prePaintScreen(data, time);
}

void ShiftWorkspaceUpEffect::paintScreen(int mask, QRegion region, ScreenPaintData& data)
{
    if (diff != 0)
        data.yTranslate -= diff / 100;
    effects->paintScreen(mask, region, data);
}

void ShiftWorkspaceUpEffect::postPaintScreen()
{
    if (up ? diff < 1000 : diff > 0)
        effects->addRepaintFull(); // trigger next animation repaint
    effects->postPaintScreen();
}

void ShiftWorkspaceUpEffect::tick()
{
    up = !up;
    effects->addRepaintFull();
}

} // namespace

#include "demo_shiftworkspaceup.moc"