Beginning Web Development, Silverlight, and ASP.NET AJAX

CHAPTER 16 ■ PROGRAMMING SILVERLIGHT WITH XAML AND JAVASCRIPT 391
In addition to using geometries, the Path object can be specified using a string that
contains what is called the path language. This uses a simple syntax of space-separated
values. These values contain a command letter, followed by a space, followed by a
comma-separated set of numbers, which are the parameters for the specified command.
Here’s an example:
In this example, the M command (for move) moves the drawing head to position
(10,10), and the L command (for draw line) draws a line to position (150,150).
The full set of path language commands are as follows:
M: Moves the draw heads to the point specified by two double values
L: Draws a line to the point specified by two double values
H: Draws a horizontal line to the point specified by a double value for its endpoint on x
V: Draws a vertical line to the point specified by a double value for its endpoint on y
C: Draws a cubic Bézier curve between the current point and the endpoint specified
by six double values, which specify the x and y points of the two control points of the
curve and the endpoint for the curve
Q: Draws a quadratic Bézier curve between the current point and the endpoint, specified
by four double values, with the first two being the x and y of the curve’s control
point and the latter two being the x and y of the endpoint
S: Very similar to the Q command in that it takes four parameters, but draws the curve
slightly differently, as the current coordinates are also used as a control point
A: Draws an elliptical arc between the current point and the endpoint
Z: Ends the current path and closes it by drawing a line between the current point
and the overall starting point of this path
XAML Controls
In addition to the shapes, brushes, and visual elements mentioned previously, Silverlight
has a number of XAML controls. These include the following:
• Image
• Glyphs