Qt Reference Documentation

# pictureflow.h Example File

demos/embedded/fluidlauncher/pictureflow.h

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     /*
       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