7497ef9148
The Compositor class actually behaves like a Singleton so it should be one. Therefore four static methods are added: * self() to access the Singleton * createCompositor() to be used by Workspace to create the instance * isCreated() to have a simple check whether the Singleton is already created * compositing() as a shortcut to test whether the compositor has been created and is active The isCreated() check is actually required as especially Clients might be created and trying to access the Compositor before it is setup.
143 lines
4.3 KiB
C++
143 lines
4.3 KiB
C++
/*****************************************************************
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This file is part of the KDE project.
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Copyright (C) 2009 Lubos Lunak <l.lunak@kde.org>
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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******************************************************************/
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#include "paintredirector.h"
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#include "composite.h"
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#include <kdebug.h>
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#include <qevent.h>
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#include <qpainter.h>
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#include <qmath.h>
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namespace KWin
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{
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PaintRedirector::PaintRedirector(QWidget* w)
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: widget(w)
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, recursionCheck(false)
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{
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added(w);
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}
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QPixmap PaintRedirector::performPendingPaint()
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{
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//qDebug() << "### performing paint, pending:" << pending.boundingRect();
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const QSize size = pending.boundingRect().size();
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if (scratch.width() < size.width() || scratch.height() < size.height()) {
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int w = (size.width() + 128) & ~128;
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int h = (size.height() + 128) & ~128;
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scratch = QPixmap(qMax(scratch.width(), w), qMax(scratch.height(), h));
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}
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scratch.fill(Qt::transparent);
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recursionCheck = true;
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// do not use DrawWindowBackground, it's ok to be transparent
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widget->render(&scratch, QPoint(), pending.boundingRect(), QWidget::DrawChildren);
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recursionCheck = false;
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pending = QRegion();
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scheduled = QRegion();
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cleanupTimer.start(2000, this);
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return scratch;
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}
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bool PaintRedirector::isToolTip(QWidget *object) const
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{
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// ### We need a more reliable way of doing this
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return object->windowFlags() & Qt::ToolTip;
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}
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bool PaintRedirector::eventFilter(QObject* o, QEvent* e)
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{
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switch(e->type()) {
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case QEvent::ChildAdded: {
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QChildEvent* c = static_cast< QChildEvent* >(e);
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if (c->child()->isWidgetType() && !isToolTip(static_cast< QWidget* >(c->child())))
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added(static_cast< QWidget* >(c->child()));
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break;
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}
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case QEvent::ChildRemoved: {
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QChildEvent* c = static_cast< QChildEvent* >(e);
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if (c->child()->isWidgetType())
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removed(static_cast< QWidget* >(c->child()));
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break;
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}
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case QEvent::Paint: {
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if (!Compositor::compositing()) {
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return false;
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}
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if (!recursionCheck) {
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QPaintEvent* pe = static_cast< QPaintEvent* >(e);
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QWidget* w = static_cast< QWidget* >(o);
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pending |= pe->region().translated(w->mapTo(widget, QPoint(0, 0)));
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scheduled = pending;
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emit paintPending();
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return true; // filter out
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}
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}
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default:
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break;
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}
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return false;
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}
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QRegion PaintRedirector::pendingRegion() const
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{
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return pending;
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}
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QRegion PaintRedirector::scheduledRepaintRegion()
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{
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QRegion tempRegion = scheduled;
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scheduled = QRegion();
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return tempRegion;
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}
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void PaintRedirector::added(QWidget* w)
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{
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w->installEventFilter(this);
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foreach (QObject * o, w->children()) {
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if (o->isWidgetType() && !isToolTip(static_cast< QWidget* >(o)))
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added(static_cast< QWidget* >(o));
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}
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}
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void PaintRedirector::removed(QWidget* w)
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{
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foreach (QObject * o, w->children()) {
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if (o->isWidgetType())
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removed(static_cast< QWidget* >(o));
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}
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w->installEventFilter(this);
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}
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void PaintRedirector::timerEvent(QTimerEvent* event)
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{
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if (event->timerId() == cleanupTimer.timerId()) {
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cleanupTimer.stop();
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scratch = QPixmap();
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}
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}
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} // namespace
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#include "paintredirector.moc"
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