Code

class TestWidget : MindFusion.Diagramming.Manipulators.Manipulator
{
	public TestWidget(DiagramItem item, RectangleF bounds)
		: base(item)
	{
		this.bounds = bounds;
	}

	public override bool HitTest(PointF point)
	{
		return bounds.Contains(point);
	}

	public override void Draw(IGraphics graphics)
	{
		graphics.DrawRectangle(Pens.Blue, bounds);
	}

	public override void OnClick(PointF point)
	{
		MessageBox.Show("click");
	}

	public override bool SupportClipping()
	{
		return false;
	}

	public override void AddToRepaintRect(ref RectangleF rect)
	{
	}

	RectangleF bounds;
}

class TestNode: ContainerNode
{
	public TestNode(Diagram diagram)
		: base(diagram)
	{
		AddManipulator(
			new TestWidget(this, new RectangleF(2, 2, 4, 4)));
	}
}