There we go. Fix this bug :)

[dolphin.git] / src / pixmapviewer.cpp

diff --git a/src/pixmapviewer.cpp b/src/pixmapviewer.cpp
index 7060423842eb64b8df58a4ebfdb0e48adaf1a7fd..a7a593bb06b7a19e350f0fd0b82a071fa6ab7180 100644 (file)
--- a/src/pixmapviewer.cpp
+++ b/src/pixmapviewer.cpp
@@ -1,6 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2006 by Peter Penz                                      *
- *   peter.penz@gmx.at                                                     *
+ *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
  *                                                                         *
  *   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  *
@@ -21,23 +20,26 @@
 #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)
+
+#include <QPainter>
+#include <QPixmap>
+#include <QKeyEvent>
+
+PixmapViewer::PixmapViewer(QWidget* parent, Transition transition) :
+    QWidget(parent),
+    m_transition(transition),
+    m_animationStep(0)
 {
-    setMinimumWidth(K3Icon::SizeEnormous);
-    setMinimumWidth(K3Icon::SizeEnormous);
+    setMinimumWidth(KIconLoader::SizeEnormous);
+    setMinimumHeight(KIconLoader::SizeEnormous);
 
-    static const int ANIMATION_DURATION = 750;
-    m_animation.setDuration(ANIMATION_DURATION);
+    m_animation.setDuration(150);
+    m_animation.setCurveShape(QTimeLine::LinearCurve);
 
-    connect( &m_animation , SIGNAL(valueChanged(qreal)) , this , SLOT(update()) );
-    connect( &m_animation , SIGNAL(finished()) , this , SLOT(finishTransition()) );
+    if (m_transition != NoTransition) {
+        connect(&m_animation, SIGNAL(valueChanged(qreal)), this, SLOT(update()));
+        connect(&m_animation, SIGNAL(finished()), this, SLOT(checkPendingPixmaps()));
+    }
 }
 
 PixmapViewer::~PixmapViewer()
@@ -46,33 +48,27 @@ PixmapViewer::~PixmapViewer()
 
 void PixmapViewer::setPixmap(const QPixmap& pixmap)
 {
-    if ( pixmap.isNull() )
+    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(); 
-}
+    if ((m_transition != NoTransition) && (m_animation.state() == QTimeLine::Running)) {
+        m_pendingPixmaps.enqueue(pixmap);
+        if (m_pendingPixmaps.count() > 5) {
+            // don't queue more than 5 pixmaps
+            m_pendingPixmaps.takeFirst();
+        }
+        return;
+    }
 
-void PixmapViewer::finishTransition()
-{
-    m_pixmap = m_nextPixmap;
-    m_nextPixmap = QPixmap();
+    m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
+    m_pixmap = pixmap;
+    update();
 
-    if ( !m_pendingPixmap.isNull() )
-    {
-        beginTransition();
+    const bool animate = (m_transition != NoTransition) &&
+                         (m_pixmap.size() != m_oldPixmap.size());
+    if (animate) {
+        m_animation.start();
     }
 }
 
@@ -80,27 +76,42 @@ 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
-    {
+    QPainter painter(this);
+
+    if (m_transition != NoTransition) {
+        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::FastTransformation);
+        painter.drawPixmap(x, y, scaledPixmap);
+    } else {
+        const int x = (width()  - m_pixmap.width() ) / 2;
+        const int y = (height() - m_pixmap.height()) / 2;
         painter.drawPixmap(x, y, m_pixmap);
     }
+}
 
-    painter.end();
+void PixmapViewer::checkPendingPixmaps()
+{
+    if (m_pendingPixmaps.count() > 0) {
+        QPixmap pixmap = m_pendingPixmaps.dequeue();
+        m_oldPixmap = m_pixmap.isNull() ? pixmap : m_pixmap;
+        m_pixmap = pixmap;
+        update();
+        m_animation.start();
+    } else {
+        m_oldPixmap = m_pixmap;
+    }
 }
 
 #include "pixmapviewer.moc"