#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);

  // MK : use a new property fot the scene : 'ReadOnly'
  void setReadOnly(bool ro);

  bool isReadOnly() const;

  void limitNodeToRect();

public Q_SLOTS:

  virtual void
  scaleUp();

  virtual void
  scaleDown();

  virtual 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();

  /**
   * MIME type used to copy/paste and drag n drop nodes.
   * You will likely want to override it with your own type.
   * This defaults to 'application/x-nodeeditor-nodes'.
   */
  virtual QString nodeMimeType() const;

private:
   void copy();
   void paste();

private:

  QAction* _clearSelectionAction;
  QAction* _deleteSelectionAction;

  QPointF _clickPos;

  FlowScene* _scene;
};
}