public GraphNode()
{
InitializeComponent();
this.Loaded += OnLoaded;
this.xCircleGroup.MouseDown += OnCircleGroupMouseDown;
this.xCircleGroup.MouseUp += OnCircleGroupMouseUp;
this.xCircleGroup.Drop += OnCircleGroupDrop;
this.xCircleGroup.MouseMove += OnCircleGroupMouseMove;
this.xCircleGroup.MouseLeave += OnCircleGroupMouseLeave;
this.xChoiceRing.Drop += OnChoiceRingDrop;
this.xScenarioRing2.Drop += OnScenarioRing2Drop;
}