nodeeditor/include/nodes/internal/NodeGraphicsObject.hpp

#pragma once

#include <QtCore/QUuid>
#include <QtWidgets/QGraphicsObject>

#include "Export.hpp"
#include "NodeIndex.hpp"
#include "NodeGeometry.hpp"
#include "NodeState.hpp"

class QGraphicsProxyWidget;

namespace QtNodes
{

class FlowScene;

/// Class reacts on GUI events, mouse clicks and
/// forwards painting operation.
class NODE_EDITOR_PUBLIC NodeGraphicsObject : public QGraphicsObject
{
  Q_OBJECT

public:
  NodeGraphicsObject(FlowScene &scene,
                     NodeIndex const& index);

  virtual
  ~NodeGraphicsObject();

  NodeIndex
  index() const;

  FlowScene&
  flowScene();

  FlowScene const&
  flowScene() const;

  NodeGeometry&
  geometry();

  NodeGeometry const&
  geometry() const;

  NodeState&
  nodeState();

  NodeState const&
  nodeState() const;

  QRectF
  boundingRect() const override;

  void
  setGeometryChanged();

  /// Visits all attached connections and corrects
  /// their corresponding end points.
  void
  moveConnections() const;


  void reactToPossibleConnection(PortType,
                                 NodeDataType,
                                 QPointF const& scenePoint);

  void
  resetReactionToConnection();

  enum { Type = UserType + 1 };

  int
  type() const override { return Type; }

  void
  lock(bool locked);

protected:
  void
  paint(QPainter*                       painter,
        QStyleOptionGraphicsItem const* option,
        QWidget*                        widget = 0) override;

  QVariant
  itemChange(GraphicsItemChange change, const QVariant &value) override;

  void
  mousePressEvent(QGraphicsSceneMouseEvent* event) override;

  void
  mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;

  void
  mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;

  void
  hoverEnterEvent(QGraphicsSceneHoverEvent* event) override;

  void
  hoverLeaveEvent(QGraphicsSceneHoverEvent* event) override;

  void
  hoverMoveEvent(QGraphicsSceneHoverEvent *) override;

  void
  mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event) override;

  void
  contextMenuEvent(QGraphicsSceneContextMenuEvent* event) override;

private:
  void
  embedQWidget();

private:

  FlowScene & _scene;

  NodeIndex _nodeIndex;

  NodeGeometry _geometry;

  NodeState _state;

  bool _locked;

  // either nullptr or owned by parent QGraphicsItem
  QGraphicsProxyWidget * _proxyWidget;
};
}