ImageViewerPanel.h++

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#ifndef __libquark_gui_ImageViewerPanel_hxx
#define __libquark_gui_ImageViewerPanel_hxx

#include <quark/Quark.h++>

#include <QLabel>
#include <QMouseEvent>
#include <QPixmap>
#include <QRubberBand>

namespace quark {
namespace gui {

class ImageViewerPanel : public QLabel
{
  Q_OBJECT;

  public:

  ImageViewerPanel(QWidget *parent = NULL);

  virtual ~ImageViewerPanel();

  void setAllowSelection(bool allowSelection);

  QPixmap image() const
  { return(_pixmap); }

  int imageWidth() const
  { return(_pixmap.width()); }

  int imageHeight() const
  { return(_pixmap.height()); }

  QRect selection() const;

  float scaleFactor() const
  { return(_scaleFactor); }

  public slots:

  void setImage(QPixmap pixmap);

  void zoomIn();

  void zoomOut();

  void zoomToFit(const QRect &rect);

  void zoomReset();

  void rotateLeft();

  void rotateRight();

  void crop(const QRect &rect);

  void clearSelection();

  signals:

  void imageSizeChanged(QSize size);

  void zoomScaleChanged(float scale);

  protected:

  virtual void mousePressEvent(QMouseEvent *event);
  virtual void mouseMoveEvent(QMouseEvent *event);

  private:

  void scaleImage();

  static const float ZOOM_FACTOR;

  QPixmap _pixmap;
  float _scaleFactor;
  QRubberBand *_selection;
  QPoint _origin;
  bool _allowSelection;
};

} // namespace gui
} // namespace quark

#endif // __libquark_gui_ImageViewerPanel_hxx