kwin/effects/_test/demo_shakymove.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_shakymove.h"

namespace KWin
{

KWIN_EFFECT(demo_shakymove, ShakyMoveEffect)

ShakyMoveEffect::ShakyMoveEffect()
{
    connect(&timer, SIGNAL(timeout()), SLOT(tick()));
}

static const int shaky_diff[] = { 0, 1, 2, 3, 2, 1, 0, -1, -2, -3, -2, -1 };
static const int SHAKY_MAX = sizeof(shaky_diff) / sizeof(shaky_diff[ 0 ]);

void ShakyMoveEffect::prePaintScreen(ScreenPrePaintData& data, int time)
{
    if (!windows.isEmpty())
        data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
    effects->prePaintScreen(data, time);
}

void ShakyMoveEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, int time)
{
    if (windows.contains(w))
        data.setTransformed();
    effects->prePaintWindow(w, data, time);
}

void ShakyMoveEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
    if (windows.contains(w))
        data.xTranslate += shaky_diff[ windows[ w ]];
    effects->paintWindow(w, mask, region, data);
}

void ShakyMoveEffect::windowUserMovedResized(EffectWindow* c, bool first, bool last)
{
    if (first) {
        if (windows.isEmpty())
            timer.start(50);
        windows[ c ] = 0;
    } else if (last) {
        windows.remove(c);
        // just repaint whole screen, transformation is involved
        effects->addRepaintFull();
        if (windows.isEmpty())
            timer.stop();
    }
}

void ShakyMoveEffect::windowClosed(EffectWindow* c)
{
    windows.remove(c);
    if (windows.isEmpty())
        timer.stop();
}

// TODO use time provided with prePaintWindow() instead
void ShakyMoveEffect::tick()
{
    for (QHash< const EffectWindow*, int >::Iterator it = windows.begin();
            it != windows.end();
            ++it) {
        if (*it == SHAKY_MAX - 1)
            *it = 0;
        else
            ++(*it);
        // just repaint whole screen, transformation is involved
        effects->addRepaintFull();
    }
}

} // namespace

#include "demo_shakymove.moc"