Hi,

This method will find the shape vertices -

PointCollection GetVertices(ShapeTemplate shape, RectangleF bounds, float angle)
{
	PointCollection vertices = new PointCollection(0);
	PointF center = new PointF(
		bounds.X + bounds.Width / 2, bounds.Y + bounds.Height / 2);

	foreach (ElementTemplate element in shape.Outline)
	{
		if (element is LineTemplate)
		{
			LineTemplate line = element as LineTemplate;
			vertices.Add(new PointF(
				bounds.X + line.Coordinates[0] * bounds.Width / 100,
				bounds.Y + line.Coordinates[1] * bounds.Height / 100));
		}
		if (element is BezierTemplate)
		{
			BezierTemplate bezier = element as BezierTemplate;
			vertices.Add(new PointF(
				bounds.X + bezier.Coordinates[0] * bounds.Width / 100,
			bounds.Y + bezier.Coordinates[1] * bounds.Height / 100));
		}
		if (element is ArcTemplate)
		{
			ArcTemplate arc = element as ArcTemplate;
			float ellipseWidth = arc.Bounds.Width * bounds.Width / 100;
			float ellipseHeight = arc.Bounds.Height * bounds.Height / 100;
			vertices.Add(new PointF(
				(float)(center.X + ellipseWidth * Math.Cos(arc.StartAngle) / 2),
				(float)(center.Y + ellipseHeight * Math.Sin(arc.StartAngle) / 2)));
		}
	}

	PointF[] vertexArray = vertices.GetArray();
	RotatePointsAt(vertexArray, center, angle);
	return new PointCollection(vertexArray);
}

void RotatePointsAt(PointF[] points, PointF pivot, float angle)
{
	Matrix rotation = new Matrix();
	rotation.RotateAt(angle, pivot);
	rotation.TransformPoints(points);
	rotation.Dispose();
}

private void flowChart1_BoxDblClicked(object sender, MindFusion.Diagramming.WinForms.BoxMouseArgs e)
{
	if (e.Box.Style == BoxStyle.Shape)
	{
		PointCollection vertices = GetVertices(
			e.Box.Shape, e.Box.BoundingRect, e.Box.RotationAngle);

		// show the vertices
		PointF origin = new PointF();
		foreach (PointF point in vertices)
		{
			fc.CreateArrow(origin, point);
		}
	}
}
 

Compare the distances between your point and all vertices to find the nearest one.

I hope that helps,
Stoyan

Good Morning,

I probably goofed by not specifying that I'm using VB.NET and Flowchart.NET 4.2.2.  I converted the code to VB, but have a couple of questions.

1.  I assume that the Matrix being used is from system.drawing.drawing2d (that being MUCH more logical than any of the windows mobile libraries)

2. The declaration of BoxDblClicked expects Mindfusion.Diagramming.Winforms.BoxMouseArgs, I changed this to MindFusion.FlowChartX.BoxMouseArgs.  Was this code for, or from, a newer version??

3. The GetVertices function returns a PointCollection, but the PointCollection constructor expects an integer, rather than the vertexArray that is being passed in.  Is there another constructor that I'm not aware of, or should I just create the collection and add the points before returning.

Thanks,
Jeff