kde/dolphin
kde/dolphin
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resize the pixmap in a smooth way instead of using a blending effect

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svn path=/trunk/KDE/kdebase/apps/; revision=654753
This commit is contained in:
Peter Penz 2007-04-16 21:17:48 +00:00
parent 931d9cc75a
commit da3bc09d21
2 changed files with 14 additions and 47 deletions
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54
src/pixmapviewer.cpp
View file

@ -24,7 +24,6 @@
#include <QtGui/QPainter>
#include <QtGui/QPixmap>
#include <QtGui/QPaintEvent>
#include <QtDebug>
PixmapViewer::PixmapViewer(QWidget* parent) :
QWidget(parent),
@ -33,10 +32,8 @@ PixmapViewer::PixmapViewer(QWidget* parent) :
setMinimumWidth(K3Icon::SizeEnormous);
setMinimumWidth(K3Icon::SizeEnormous);
m_animation.setDuration(750);
m_animation.setDuration(300);
connect(&m_animation, SIGNAL(valueChanged(qreal)), this, SLOT(update()));
connect(&m_animation, SIGNAL(finished()), this, SLOT(finishTransition()));
}
PixmapViewer::~PixmapViewer()
@ -49,55 +46,30 @@ void PixmapViewer::setPixmap(const QPixmap& pixmap)
return;
}
m_pendingPixmap = pixmap;
m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
m_pixmap = 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;
QPainter painter(this);
if (!m_nextPixmap.isNull()) {
const int nextPixmapX = (width() - m_nextPixmap.width()) / 2;
const int nextPixmapY = (height() - m_nextPixmap.height()) / 2;
const float value = m_animation.currentValue();
painter.setOpacity( 1 - m_animation.currentValue() );
painter.drawPixmap(x, y, m_pixmap);
painter.setOpacity( m_animation.currentValue() );
painter.drawPixmap(nextPixmapX,nextPixmapY,m_nextPixmap);
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;
if (m_oldPixmap.width() > m_pixmap.width()) {
painter.drawPixmap(x, y, m_oldPixmap.scaled(scaledWidth, scaledHeight));
} else {
painter.drawPixmap(x, y, m_pixmap);
painter.drawPixmap(x, y, m_pixmap.scaled(scaledWidth, scaledHeight));
}
painter.end();
}
#include "pixmapviewer.moc"

7
src/pixmapviewer.h
View file

@ -48,14 +48,9 @@ public:
protected:
virtual void paintEvent(QPaintEvent* event);
private slots:
void beginTransition();
void finishTransition();
private:
QPixmap m_pixmap;
QPixmap m_nextPixmap;
QPixmap m_pendingPixmap;
QPixmap m_oldPixmap;
QTimeLine m_animation;
int m_animationStep;
};