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/****************************************************************************
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** Copyright (C) 2005-2007 Trolltech ASA. All rights reserved.
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** This file is part of the demonstration applications of the Qt Toolkit.
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#include "customproxy.h"
#include <QtGui>
CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)
: QGraphicsProxyWidget(parent, wFlags)
{
timeLine = new QTimeLine(250, this);
connect(timeLine, SIGNAL(valueChanged(qreal)),
this, SLOT(updateStep(qreal)));
connect(timeLine, SIGNAL(stateChanged(QTimeLine::State)),
this, SLOT(stateChanged(QTimeLine::State)));
}
QRectF CustomProxy::boundingRect() const
{
return QGraphicsProxyWidget::boundingRect().adjusted(0, 0, 10, 10);
}
void CustomProxy::paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
QRectF br = boundingRect();
painter->setPen(Qt::NoPen);
painter->setBrush(QColor(0, 0, 0, 64));
painter->drawPolygon(QPolygonF(br.adjusted(10, 10, 10, 10))
.intersected(br));
QGraphicsProxyWidget::paintWindowFrame(painter, option, widget);
}
void CustomProxy::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
QGraphicsProxyWidget::hoverEnterEvent(event);
scene()->setActiveWindow(this);
if (timeLine->direction() != QTimeLine::Forward)
timeLine->setDirection(QTimeLine::Forward);
if (timeLine->state() == QTimeLine::NotRunning)
timeLine->start();
}
void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
QGraphicsProxyWidget::hoverLeaveEvent(event);
if (timeLine->direction() != QTimeLine::Backward)
timeLine->setDirection(QTimeLine::Backward);
if (timeLine->state() == QTimeLine::NotRunning)
timeLine->start();
}
void CustomProxy::updateStep(qreal step)
{
QRectF r = boundingRect();
setTransform(QTransform()
.translate(r.width() / 2, r.height() / 2)
.rotate(step * 30, Qt::XAxis)
.rotate(step * 10, Qt::YAxis)
.rotate(step * 5, Qt::ZAxis)
.scale(1 + 1.5 * step, 1 + 1.5 * step)
.translate(-r.width() / 2, -r.height() / 2));
}
void CustomProxy::stateChanged(QTimeLine::State state)
{
if (state == QTimeLine::Running) {
if (timeLine->direction() == QTimeLine::Forward)
setCacheMode(NoCache);
} else if (state == QTimeLine::NotRunning) {
if (timeLine->direction() == QTimeLine::Backward)
setCacheMode(DeviceCoordinateCache);
}
}
Copyright © 2007 Trolltech | Trademarks | Qt 4.4.0-tp1 |