add a small widget for showing an animation from the "animations" category of the icon theme

similar to what KAnimatedButton does, but much simplier

svn path=/trunk/KDE/kdegraphics/okular/; revision=926295

CMakeLists.txt

@@ -122,6 +122,7 @@ set(okularpart_SRCS
    conf/dlgperformance.cpp
    conf/dlgpresentation.cpp
    ui/embeddedfilesdialog.cpp
+   ui/animatedwidget.cpp
    ui/annotwindow.cpp
    ui/annotationmodel.cpp
    ui/annotationpopup.cpp

ui/animatedwidget.cpp

@@ -0,0 +1,103 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Pino Toscano <pino@kde.org>                     *
+ *                                                                         *
+ *   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.                                   *
+ ***************************************************************************/
+
+#include "animatedwidget.h"
+
+#include <qevent.h>
+#include <qpainter.h>
+
+#include <kiconloader.h>
+
+AnimatedWidget::AnimatedWidget( const QString& iconName, QWidget *parent )
+    : QWidget( parent ), m_icon( iconName ), m_frames( 0 ), m_currentFrame( 0 ),
+    m_size( 0 )
+{
+    setAutoFillBackground( false );
+
+    hide();
+}
+
+AnimatedWidget::~AnimatedWidget()
+{
+}
+
+void AnimatedWidget::start()
+{
+    if ( m_timer.isActive() )
+       return;
+
+    if ( !m_frames )
+    {
+        load();
+        if ( !m_frames )
+            return;
+    }
+
+    m_timer.start( 1000 / m_frames, this );
+    show();
+}
+
+void AnimatedWidget::stop()
+{
+    m_timer.stop();
+    m_currentFrame = 0;
+    hide();
+}
+
+void AnimatedWidget::paintEvent( QPaintEvent *event )
+{
+    Q_UNUSED( event );
+
+    const int row_size = m_pixmap.width() / m_size;
+    const int row = m_currentFrame / row_size;
+    const int column = m_currentFrame % row_size;
+
+    QPainter p( this );
+    p.fillRect( rect(), Qt::transparent );
+    p.drawPixmap( 0, 0, m_pixmap, column * m_size, row * m_size, m_size, m_size );
+}
+
+void AnimatedWidget::resizeEvent( QResizeEvent *event )
+{
+    Q_UNUSED( event );
+
+    m_timer.stop();
+    load();
+}
+
+void AnimatedWidget::timerEvent( QTimerEvent *event )
+{
+    if ( event->timerId() == m_timer.timerId() )
+    {
+        m_currentFrame++;
+        if ( m_currentFrame == m_frames )
+            m_currentFrame = 0;
+        update();
+    }
+    QWidget::timerEvent( event );
+}
+
+void AnimatedWidget::load()
+{
+    // FIXME implement a better logic for the animation size
+    m_size = 22;
+    const QString path = KIconLoader::global()->iconPath( m_icon, -m_size );
+    QPixmap pix( path );
+    if ( pix.isNull() )
+        return;
+
+    if ( ( pix.width() % m_size != 0 ) || ( pix.height() % m_size != 0 ) )
+        return;
+
+    m_frames = ( pix.height() / m_size ) * ( pix.width() / m_size );
+    m_pixmap = pix;
+    m_currentFrame = 0;
+}
+
+#include "animatedwidget.moc"

ui/animatedwidget.h

@@ -0,0 +1,45 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Pino Toscano <pino@kde.org>                     *
+ *                                                                         *
+ *   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.                                   *
+ ***************************************************************************/
+
+#ifndef ANIMATEDWIDGET_H
+#define ANIMATEDWIDGET_H
+
+#include <qbasictimer.h>
+#include <qpixmap.h>
+#include <qwidget.h>
+
+class AnimatedWidget : public QWidget
+{
+    Q_OBJECT
+
+    public:
+        AnimatedWidget( const QString& iconName, QWidget *parent = 0 );
+        virtual ~AnimatedWidget();
+
+    public slots:
+        void start();
+        void stop();
+
+    protected:
+        void paintEvent( QPaintEvent *event );
+        void resizeEvent( QResizeEvent *event );
+        void timerEvent( QTimerEvent *event );
+
+    private:
+        void load();
+
+        QString m_icon;
+        QPixmap m_pixmap;
+        int m_frames;
+        int m_currentFrame;
+        int m_size;
+        QBasicTimer m_timer;
+};
+
+#endif