graph_view.h

#ifndef GUI_GRAPH_VIEW_H_
#define GUI_GRAPH_VIEW_H_

// Qt-imports
#include <QGraphicsView>
#include <QWidget>
#include <QWheelEvent>
#include <QAction>
#include <QMenu>
#include <QDebug>
#include <QWhatsThis>
#include <QRubberBand>

// General imports
#include <cmath>
#include "qmath.h"
#include <typeinfo>

// Local imports
#include "graph_scene.h"
#include "node_widget.h"

class GraphView : public QGraphicsView {
    Q_OBJECT

    public:

        GraphView(QWidget* parent = 0);

    GraphView(GraphScene* scene, QWidget* parent = 0);
    
    void set_zoom_level(uint value);
    
    void reset_prev_marked();

    std::vector<NodeWidget*> get_prev_marked();
 
    QRectF visibleRect();

    void fitInView(QRectF scene, Qt::AspectRatioMode aspectRatio);
  protected:
    void resizeEvent(QResizeEvent*);
  private:
    
    QPointF mousePos;

    std::vector<NodeWidget*> prev_marked_nodes;       

    QSlider* zoom_slider_;

    int previous_value_;

    QRubberBand* rubberBand;

    QPoint rubberBandOrigin;


  protected:
    
    void setupView(); 

    void wheelEvent(QWheelEvent* event);  
    
    void mousePressEvent( QMouseEvent* event);

    void mouseDoubleClickEvent( QMouseEvent* event );

    void mouseMoveEvent(QMouseEvent *event);

    void mouseReleaseEvent(QMouseEvent *event);
    
  public slots:
    
    void zoomIn(int level = 1);
    
    void zoomOut(int level = 1);
    
    void onCustomContextMenu(const QPoint &point);

  private slots:

    void scaleView(int);


  signals:
    
    void itemDoubleClicked(QGraphicsItem* item);
    
    void itemCtrlClicked(QGraphicsItem* item);
    
    void right_click_menu(const QPoint &point, std::string name);
    
    void item_selected_in_graph(std::string name, bool first);
};

#endif