imageviewer.h Example File

widgets/imageviewer/imageviewer.h

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  #ifndef IMAGEVIEWER_H
  #define IMAGEVIEWER_H

  #include <QMainWindow>
  #include <QImage>
  #ifndef QT_NO_PRINTER
  #include <QPrinter>
  #endif

  class QAction;
  class QLabel;
  class QMenu;
  class QScrollArea;
  class QScrollBar;

  class ImageViewer : public QMainWindow
  {
      Q_OBJECT

  public:
      ImageViewer();
      bool loadFile(const QString &);

  private slots:
      void open();
      void saveAs();
      void print();
      void copy();
      void paste();
      void zoomIn();
      void zoomOut();
      void normalSize();
      void fitToWindow();
      void about();

  private:
      void createActions();
      void createMenus();
      void updateActions();
      bool saveFile(const QString &fileName);
      void setImage(const QImage &newImage);
      void scaleImage(double factor);
      void adjustScrollBar(QScrollBar *scrollBar, double factor);

      QImage image;
      QLabel *imageLabel;
      QScrollArea *scrollArea;
      double scaleFactor;

  #ifndef QT_NO_PRINTER
      QPrinter printer;
  #endif

      QAction *saveAsAct;
      QAction *printAct;
      QAction *copyAct;
      QAction *zoomInAct;
      QAction *zoomOutAct;
      QAction *normalSizeAct;
      QAction *fitToWindowAct;
  };

  #endif