Long live Qt 4.5!

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+/****************************************************************************
+*
+* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
+* This is version of the Pictureflow animated image show widget modified by Nokia.
+*
+*  $QT_BEGIN_LICENSE:LGPL$
+*  No Commercial Usage
+*  This file contains pre-release code and may not be distributed.
+*  You may use this file in accordance with the terms and conditions
+*  contained in the either Technology Preview License Agreement or the
+*  Beta Release License Agreement.
+* 
+*  GNU Lesser General Public License Usage
+*  Alternatively, this file may be used under the terms of the GNU Lesser
+*  General Public License version 2.1 as published by the Free Software
+*  Foundation and appearing in the file LICENSE.LGPL included in the
+*  packaging of this file.  Please review the following information to
+*  ensure the GNU Lesser General Public License version 2.1 requirements
+*  will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+* 
+*  In addition, as a special exception, Nokia gives you certain
+*  additional rights. These rights are described in the Nokia Qt LGPL
+*  Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+*  package.
+* 
+*  GNU General Public License Usage
+*  Alternatively, this file may be used under the terms of the GNU
+*  General Public License version 3.0 as published by the Free Software
+*  Foundation and appearing in the file LICENSE.GPL included in the
+*  packaging of this file.  Please review the following information to
+*  ensure the GNU General Public License version 3.0 requirements will be
+*  met: http://www.gnu.org/copyleft/gpl.html.
+* 
+*  If you are unsure which license is appropriate for your use, please
+*  contact the sales department at qt-sales@nokia.com.
+*  $QT_END_LICENSE$
+*
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*     * Redistributions of source code must retain the above copyright
+*       notice, this list of conditions and the following disclaimer.
+*     * Redistributions in binary form must reproduce the above copyright
+*       notice, this list of conditions and the following disclaimer in the
+*       documentation and/or other materials provided with the distribution.
+*     * Neither the name of the <organization> nor the
+*       names of its contributors may be used to endorse or promote products
+*       derived from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY TROLLTECH ASA ``AS IS'' AND ANY
+* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
+* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+****************************************************************************/
+/*
+  ORIGINAL COPYRIGHT HEADER
+  PictureFlow - animated image show widget
+  http://pictureflow.googlecode.com
+
+  Copyright (C) 2007 Ariya Hidayat (ariya@kde.org)
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+  THE SOFTWARE.
+*/
+
+#ifndef PICTUREFLOW_H
+#define PICTUREFLOW_H
+
+#include <QWidget>
+
+class PictureFlowPrivate;
+
+/*!
+  Class PictureFlow implements an image show widget with animation effect 
+  like Apple's CoverFlow (in iTunes and iPod). Images are arranged in form 
+  of slides, one main slide is shown at the center with few slides on 
+  the left and right sides of the center slide. When the next or previous 
+  slide is brought to the front, the whole slides flow to the right or 
+  the right with smooth animation effect; until the new slide is finally 
+  placed at the center.
+
+ */ 
+class PictureFlow : public QWidget
+{
+Q_OBJECT
+
+  Q_PROPERTY(int slideCount READ slideCount WRITE setSlideCount)
+  Q_PROPERTY(int currentSlide READ currentSlide WRITE setCurrentSlide)
+  Q_PROPERTY(QSize slideSize READ slideSize WRITE setSlideSize)
+  Q_PROPERTY(int zoomFactor READ zoomFactor WRITE setZoomFactor)
+
+public:
+  /*!
+    Creates a new PictureFlow widget.
+  */  
+  PictureFlow(QWidget* parent = 0);
+
+  /*!
+    Destroys the widget.
+  */
+  ~PictureFlow();
+
+  /*!
+    Returns the total number of slides.
+  */
+  int slideCount() const;
+
+  /*!
+    Sets the total number of slides.
+  */
+  void setSlideCount(int count);
+
+  /*!
+    Returns the dimension of each slide (in pixels).
+  */  
+  QSize slideSize() const;
+
+  /*!
+    Sets the dimension of each slide (in pixels).
+  */  
+  void setSlideSize(QSize size);
+
+  /*!
+    Sets the zoom factor (in percent).
+  */ 
+  void setZoomFactor(int zoom);
+
+  /*!
+    Returns the zoom factor (in percent).
+  */
+  int zoomFactor() const;
+
+  /*!
+    Clears any caches held to free up memory
+  */
+  void clearCaches();
+
+  /*!
+    Returns QImage of specified slide.
+    This function will be called only whenever necessary, e.g. the 100th slide
+    will not be retrived when only the first few slides are visible.
+  */  
+  virtual QImage slide(int index) const;
+
+  /*!
+    Sets an image for specified slide. If the slide already exists,
+    it will be replaced.
+  */  
+  virtual void setSlide(int index, const QImage& image);
+
+  virtual void setSlideCaption(int index, QString caption);
+
+  /*!
+    Sets a pixmap for specified slide. If the slide already exists,
+    it will be replaced.
+  */  
+  virtual void setSlide(int index, const QPixmap& pixmap);
+
+  /*!
+    Returns the index of slide currently shown in the middle of the viewport.
+  */  
+  int currentSlide() const;
+
+public slots:
+
+  /*!
+    Sets slide to be shown in the middle of the viewport. No animation 
+    effect will be produced, unlike using showSlide.
+  */  
+  void setCurrentSlide(int index);
+
+  /*!
+    Clears images of all slides.
+  */
+  void clear();
+
+  /*!
+    Rerender the widget. Normally this function will be automatically invoked
+    whenever necessary, e.g. during the transition animation.
+  */
+  void render();
+
+  /*!
+    Shows previous slide using animation effect.
+  */
+  void showPrevious();
+
+  /*!
+    Shows next slide using animation effect.
+  */
+  void showNext();
+
+  /*!
+    Go to specified slide using animation effect.
+  */
+  void showSlide(int index);
+
+signals:
+  void itemActivated(int index);
+  void inputReceived();
+
+protected:
+  void paintEvent(QPaintEvent *event);
+  void keyPressEvent(QKeyEvent* event);
+  void mouseMoveEvent(QMouseEvent* event);
+  void mousePressEvent(QMouseEvent* event);
+  void mouseReleaseEvent(QMouseEvent* event);
+  void resizeEvent(QResizeEvent* event);
+  void timerEvent(QTimerEvent* event);
+
+private:
+  PictureFlowPrivate* d;
+};
+
+#endif // PICTUREFLOW_H