/// <summary>
/// Gets the polygon points.
/// </summary>
/// <returns>a warper for helping handling polygon points or <c>null</c> if this is not a shape that have polygon points.</returns>
virtual public OoPolygonPointsObserver GetPolygonPointsObserver()
{
if (_ppObs == null && PolygonHelper.IsFreeform(Shape))
{
_ppObs = new OoPolygonPointsObserver(this);
}
return(_ppObs);
}
/// <summary>
/// Initializes a new instance of the <see cref="OoPolygonPointsObserver" /> class.
/// </summary>
/// <param name="shape">The corresponding shape.</param>
/// <exception cref="ArgumentNullException">shape</exception>
/// <exception cref="ArgumentException">shape must be a polygon or a bezier curve;shape</exception>
public OoPolygonPointsObserver(OoShapeObserver shape)
{
if (shape == null)
{
throw new ArgumentNullException("shape");
}
if (!PolygonHelper.IsFreeform(shape.Shape))
{
throw new ArgumentException("shape must be a polygon or a bezier curve", "shape");
}
Shape = shape;
Shape.BoundRectChangeEventHandlers += Shape_BoundRectChangeEventHandlers;
Shape.ObserverDisposing += Shape_ObserverDisposing;
Update();
IsEmpty = false;
}