library_scene.h

#pragma once
 
#include <QApplication>
#include <QGraphicsItem>
#include <QGraphicsScene>
#include <QMouseEvent>
 
#include "elements/draggable.h"

class LibraryScene : public QGraphicsScene
{
  Q_OBJECT
public:
  LibraryScene(QObject* parent = nullptr);

  QRectF visibleItemsBounds() const;

  bool filterNodes(const QString& query);

  void relayoutVisibleItems();

  void themeChanged();
 
signals:
  void libraryNodeSelected(const QString& nodeType);
 
protected:
  void mousePressEvent(QGraphicsSceneMouseEvent* event) override;

  void mouseMoveEvent(QGraphicsSceneMouseEvent* event) override;

  void mouseReleaseEvent(QGraphicsSceneMouseEvent* event) override;

  void contextMenuEvent(QGraphicsSceneContextMenuEvent* event) override;
 
private:
  QPointF mPressScenePos;       
  bool mPressed = false;        
  bool mDragging = false;       
  DraggableItem* mClickedItem;  

  void clearSelectedNodes();
};