nodeeditor/include/nodes/internal/FlowView.hpp

#pragma once

#include <QtWidgets/QGraphicsView>

#include "Export.hpp"

namespace QtNodes
{

class FlowScene;

class NODE_EDITOR_PUBLIC FlowView
  : public QGraphicsView
{
  Q_OBJECT
public:

  FlowView(QWidget *parent                   = Q_NULLPTR);
  FlowView(FlowScene *scene, QWidget *parent = Q_NULLPTR);

  FlowView(const FlowView&) = delete;
  FlowView
  operator=(const FlowView&) = delete;

  QAction*
  clearSelectionAction() const;

  QAction*
  deleteSelectionAction() const;

  void
  setScene(FlowScene *scene);

public slots:

  void
  scaleUp();

  void
  scaleDown();

  void
  deleteSelectedNodes();

protected:

  void
  contextMenuEvent(QContextMenuEvent *event) override;

  void
  wheelEvent(QWheelEvent *event) override;

  void
  keyPressEvent(QKeyEvent *event) override;

  void
  keyReleaseEvent(QKeyEvent *event) override;

  void
  mousePressEvent(QMouseEvent *event) override;

  void
  mouseMoveEvent(QMouseEvent *event) override;

  void
  drawBackground(QPainter* painter, const QRectF& r) override;

  void
  showEvent(QShowEvent *event) override;

protected:

  FlowScene *
  scene();

private:

  QAction* _clearSelectionAction;
  QAction* _deleteSelectionAction;

  QPointF _clickPos;

  FlowScene* _scene;
};
}