mirror of
https://invent.kde.org/system/dolphin
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118 lines
4.3 KiB
C++
118 lines
4.3 KiB
C++
/***************************************************************************
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* Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at> *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA *
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***************************************************************************/
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#include "pixmapviewer.h"
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#include <kiconloader.h>
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#include <QPainter>
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#include <QPixmap>
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#include <QKeyEvent>
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PixmapViewer::PixmapViewer(QWidget* parent, Transition transition) :
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QWidget(parent),
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m_transition(transition),
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m_animationStep(0)
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{
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setMinimumWidth(KIconLoader::SizeEnormous);
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setMinimumHeight(KIconLoader::SizeEnormous);
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m_animation.setDuration(150);
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m_animation.setCurveShape(QTimeLine::LinearCurve);
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if (m_transition != NoTransition) {
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connect(&m_animation, SIGNAL(valueChanged(qreal)), this, SLOT(update()));
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connect(&m_animation, SIGNAL(finished()), this, SLOT(checkPendingPixmaps()));
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}
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}
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PixmapViewer::~PixmapViewer()
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{
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}
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void PixmapViewer::setPixmap(const QPixmap& pixmap)
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{
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if (pixmap.isNull()) {
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return;
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}
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if ((m_transition != NoTransition) && (m_animation.state() == QTimeLine::Running)) {
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m_pendingPixmaps.enqueue(pixmap);
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if (m_pendingPixmaps.count() > 5) {
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// don't queue more than 5 pixmaps
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m_pendingPixmaps.takeFirst();
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}
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return;
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}
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m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
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m_pixmap = pixmap;
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update();
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const bool animate = (m_transition != NoTransition) &&
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(m_pixmap.size() != m_oldPixmap.size());
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if (animate) {
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m_animation.start();
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}
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}
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void PixmapViewer::paintEvent(QPaintEvent* event)
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{
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QWidget::paintEvent(event);
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QPainter painter(this);
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if (m_transition != NoTransition) {
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const float value = m_animation.currentValue();
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const int scaledWidth = static_cast<int>((m_oldPixmap.width() * (1.0 - value)) + (m_pixmap.width() * value));
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const int scaledHeight = static_cast<int>((m_oldPixmap.height() * (1.0 - value)) + (m_pixmap.height() * value));
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const int x = (width() - scaledWidth ) / 2;
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const int y = (height() - scaledHeight) / 2;
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const bool useOldPixmap = (m_transition == SizeTransition) &&
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(m_oldPixmap.width() > m_pixmap.width());
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const QPixmap& largePixmap = useOldPixmap ? m_oldPixmap : m_pixmap;
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const QPixmap scaledPixmap = largePixmap.scaled(scaledWidth,
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scaledHeight,
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Qt::IgnoreAspectRatio,
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Qt::FastTransformation);
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painter.drawPixmap(x, y, scaledPixmap);
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} else {
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const int x = (width() - m_pixmap.width() ) / 2;
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const int y = (height() - m_pixmap.height()) / 2;
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painter.drawPixmap(x, y, m_pixmap);
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}
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}
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void PixmapViewer::checkPendingPixmaps()
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{
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if (m_pendingPixmaps.count() > 0) {
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QPixmap pixmap = m_pendingPixmaps.dequeue();
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m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
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m_pixmap = pixmap;
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update();
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m_animation.start();
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} else {
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m_oldPixmap = m_pixmap;
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}
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}
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#include "pixmapviewer.moc"
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