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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);
static const int ANIMATION_DURATION = 750;
m_animation.setDuration(ANIMATION_DURATION);
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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