#1,144 – Geometry in Custom Shape Doesn’t Automatically Scale

If you define a custom Shape by creating some Geometry, the resulting geometry will not automatically scale when shape’s size is changed.

Suppose that we have the following custom shape.

    public class MyShape : Shape
    {
        protected override Geometry DefiningGeometry
        {
            get
            {
                StreamGeometry geom = new StreamGeometry();
                using (StreamGeometryContext ctx = geom.Open())
                {
                    ctx.BeginFigure(
                        new Point(0.0, 0.0),
                        false,
                        false);
                    ctx.LineTo(
                        new Point(50.0, 50.0),
                        true,
                        false);
                }

                return geom;
            }
        }
    }

Placing this control in a StackPanel, it’s size is just large enough to accommodate the geometry.

1144-001

If we explicitly make the shape larger, the underlying geometry stays the same size.

1144-002

About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

One Response to #1,144 – Geometry in Custom Shape Doesn’t Automatically Scale

  1. Pingback: Dew Drop – August 26, 2014 (#1842) | Morning Dew

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