No way to alter GeomGraph radX and radY effectively

[wolfmcnally]

GeomGraph has public attributes radX and radY which contain the corner radius of the graph's bounding rectangle, used when determining the boundaryCurve for the graph.

• radX and radY in GeomGraph are assigned 10 in the constructor. The constructor then immediately uses these values to construct rrect: RRect.
• boundaryCurve cannot be altered directly: the setter throws an exception.
• It can be altered by assigning boundingBox, but in this case it copies the corner radii from the existing RRect, which have previously been assigned 10.
• So changing radX and radY after constructing the graph does not affect subsequence alterations of boundingBox: they continue to use the values embedded in the boundingBox RRect.

This leaves no apparent API for altering the corner radii.

Expected behavior:

• changing radX or radY after constructing a GeomGraph and then assigning boundingBox should create a boundaryCurve with the new radii.
• or a more sophisticated API for either constructing GeomGraph with configurable corner radii
• or assigning radX and radY invalidates the existing boundaryShape
• or allow a direct assignment of rrect.

My current workaround uses the last method (which breaks encapsulation):

function setCornerRadius(graph: GeomGraph, radius: number) {
    const bounds = graph.boundingBox;
    const rrect = new RRect({left: bounds.left, top: bounds.top, right: bounds.right, bottom: bounds.bottom, radX: radius, radY: radius});
    (graph as any).rrect = rrect;
}

[levnach]

Please create a pull request with a change that you prefer.