101 Windows® Phone 7 Apps, Volume I: Developing Apps 1-50

Appendix E. Geometry Reference

Lessons

• Basic Geometries

• Geometry Group

• Representing Geometries as Strings

In Silverlight, a geometry is the simplest possible abstract representation of a shape or path. Geometries are used in two places—the value for Path.Data and the value for UIElement.Clip. These properties are of type Geometry, an abstract base class with several subclasses.

Basic Geometries

The four basic geometries are as follows:

→ RectangleGeometry—Has a Rect property for defining its dimensions and RadiusX and RadiusY properties for defining rounded corners

→ EllipseGeometry—Has RadiusX and RadiusY properties, plus a Center property

→ LineGeometry—Has StartPoint and EndPoint properties to define a line segment

→ PathGeometry ...