public GraphSceneGlassPane() {
   this.scene = new ObjectScene();
   this.scene.setOpaque(false);
   this.mainLayer = new LayerWidget(this.scene);
   this.connectionLayer = new LayerWidget(this.scene);
   this.constraintsLayer = new LayerWidget(this.scene);
   this.jScroolPane = new JScrollPane();
   this.jScroolPane.setOpaque(false);
   this.scene.addChild(Costanti.INDEX_MAIN_LAYER, this.mainLayer);
   this.scene.addChild(Costanti.INDEX_CONNECTION_LAYER, this.connectionLayer);
   this.scene.addChild(Costanti.INDEX_CONSTRAINTS_LAYER, this.constraintsLayer);
   this.view = scene.createView();
   this.view.setVisible(true);
   this.view.setOpaque(false);
   this.setLayout(new BorderLayout());
   this.add(this.view, BorderLayout.CENTER);
 }