/// <summary>
/// You still need to set its <c>Stroke</c>, <c>StrokeThickness</c>, <c>Fill</c>, et al, as with any <c>Shape</c>.
/// </summary>
public ToolHandle()
{
NodePanel.SetFigure(this, NodeFigure.Rectangle);
this.Stretch = Stretch.Fill; // because GetFigureGeometry always returns a Geometry with unscaled points from 0,0 to 1,1
}
