GraphicsView.h

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/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#ifndef GRAPHICSVIEW_H
#define GRAPHICSVIEW_H
 
#include <QGraphicsView>
#include <QImage>
#include <QUrl>
 
class MainWindow;
class QByteArray;
class QGraphicsPixmapItem;
class QGraphicsScene;
 
class GraphicsView : public QGraphicsView
{
  Q_OBJECT;
 
public:
  GraphicsView(QGraphicsScene *scene,
               MainWindow &mainWindow);
  virtual ~GraphicsView();
 
  virtual void contextMenuEvent (QContextMenuEvent *event);
 
  virtual void dragEnterEvent (QDragEnterEvent *event);
 
  virtual void dragMoveEvent (QDragMoveEvent *event);
 
  virtual void dropEvent (QDropEvent *event);
 
  virtual void keyPressEvent (QKeyEvent *event);
 
  virtual void mouseMoveEvent (QMouseEvent *event);
 
  virtual void mousePressEvent (QMouseEvent *event);
 
  virtual void mouseReleaseEvent (QMouseEvent *event);
 
  virtual void wheelEvent(QWheelEvent *event);
 
signals:
  void signalContextMenuEventAxis (QString pointIdentifier);
 
  void signalContextMenuEventGraph (QStringList pointIdentifiers);
 
  void signalDraggedDigFile (QString);
 
  void signalDraggedImage (QImage);
 
  void signalDraggedImageUrl (QUrl);
 
  void signalKeyPress (Qt::Key, bool atLeastOneSelectedItem);
 
  void signalMouseMove (QPointF);
 
  void signalMousePress (QPointF);
 
  void signalMouseRelease (QPointF);
 
  void signalViewZoomIn();
 
  void signalViewZoomOut();
 
public slots:
  void slotDropRegression (QString);
 
private:
  GraphicsView();
 
  bool handleDropEvent (const QString &possibleDigFileName,
                        bool hasUrls,
                        const QUrl &urlFirst,
                        bool hasImage,
                        const QImage &image);
  QStringList pointIdentifiersFromSelection (const QList<QGraphicsItem*> &items) const;
  bool inBounds (const QPointF &posScreen);
 
};
 
#endif // GRAPHICSVIEW_H