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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>
PixmapViewer::PixmapViewer(QWidget* parent, Transition transition) :
QWidget(parent),
m_transition(transition),
m_animationStep(0)
{
setMinimumWidth(K3Icon::SizeEnormous);
setMinimumWidth(K3Icon::SizeEnormous);
m_animation.setDuration(300);
connect(&m_animation, SIGNAL(valueChanged(qreal)), this, SLOT(update()));
}
PixmapViewer::~PixmapViewer()
{
}
void PixmapViewer::setPixmap(const QPixmap& pixmap)
{
if (pixmap.isNull()) {
return;
}
m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
m_pixmap = pixmap;
update();
const bool animate = (m_transition != NoTransition) &&
(m_pixmap.size() != m_oldPixmap.size());
if (animate) {
m_animation.start();
}
}
void PixmapViewer::paintEvent(QPaintEvent* event)
{
QWidget::paintEvent(event);
QPainter painter(this);
const float value = m_animation.currentValue();
const int scaledWidth = static_cast<int>((m_oldPixmap.width() * (1.0 - value)) + (m_pixmap.width() * value));
const int scaledHeight = static_cast<int>((m_oldPixmap.height() * (1.0 - value)) + (m_pixmap.height() * value));
const int x = (width() - scaledWidth ) / 2;
const int y = (height() - scaledHeight) / 2;
const bool useOldPixmap = (m_transition == SizeTransition) &&
(m_oldPixmap.width() > m_pixmap.width());
const QPixmap& largePixmap = useOldPixmap ? m_oldPixmap : m_pixmap;
const QPixmap scaledPixmap = largePixmap.scaled(scaledWidth,
scaledHeight,
Qt::IgnoreAspectRatio,
Qt::SmoothTransformation);
painter.drawPixmap(x, y, scaledPixmap);
}
#include "pixmapviewer.moc"
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