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/***************************************************************************
* Copyright (C) 2006 by Peter Penz *
* [email protected] *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
***************************************************************************/
#include "pixmapviewer.h"
#include <kiconloader.h>
#include <QtGui/QPainter>
#include <QtGui/QPixmap>
#include <QtGui/QPaintEvent>
#include <QtDebug>
PixmapViewer::PixmapViewer(QWidget* parent) :
QWidget(parent),
m_animationStep(0)
{
setMinimumWidth(K3Icon::SizeEnormous);
setMinimumWidth(K3Icon::SizeEnormous);
m_animation.setDuration(750);
connect(&m_animation, SIGNAL(valueChanged(qreal)), this, SLOT(update()));
connect(&m_animation, SIGNAL(finished()), this, SLOT(finishTransition()));
}
PixmapViewer::~PixmapViewer()
{
}
void PixmapViewer::setPixmap(const QPixmap& pixmap)
{
if (pixmap.isNull()) {
return;
}
m_pendingPixmap = pixmap;
if (m_animation.state() == QTimeLine::NotRunning) {
beginTransition();
}
}
void PixmapViewer::beginTransition()
{
Q_ASSERT(!m_pendingPixmap.isNull());
Q_ASSERT(m_nextPixmap.isNull());
m_nextPixmap = m_pendingPixmap;
m_pendingPixmap = QPixmap();
m_animation.start();
}
void PixmapViewer::finishTransition()
{
m_pixmap = m_nextPixmap;
m_nextPixmap = QPixmap();
if (!m_pendingPixmap.isNull()) {
beginTransition();
}
}
void PixmapViewer::paintEvent(QPaintEvent* event)
{
QWidget::paintEvent(event);
QPainter painter;
painter.begin(this);
const int x = (width() - m_pixmap.width()) / 2;
const int y = (height() - m_pixmap.height()) / 2;
if (!m_nextPixmap.isNull()) {
const int nextPixmapX = (width() - m_nextPixmap.width()) / 2;
const int nextPixmapY = (height() - m_nextPixmap.height()) / 2;
painter.setOpacity( 1 - m_animation.currentValue() );
painter.drawPixmap(x, y, m_pixmap);
painter.setOpacity( m_animation.currentValue() );
painter.drawPixmap(nextPixmapX,nextPixmapY,m_nextPixmap);
} else {
painter.drawPixmap(x, y, m_pixmap);
}
painter.end();
}
#include "pixmapviewer.moc"
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