Beginning Web Development, Silverlight, and ASP.NET AJAX

CHAPTER 16 ■ PROGRAMMING SILVERLIGHT WITH XAML AND JAVASCRIPT 399
The Stop Method
This will stop the current media playback, regardless of whether it is currently playing or
paused. Here’s an example:
var med = sender.content.findName("mplayer");
med.Stop();
Handling Events
In this section, we’ll first look at the common events that are available to all XAML elements
in Silverlight, and then toward the end of the section, we’ll look into those that
work specifically with the MediaElement.
Managing Focus with the GotFocus and LostFocus Events
The only object that can receive Focus events in Silverlight 1.0 is the root Canvas. When it
receives focus, the GotFocus event will fire. When it loses it, the LostFocus event will fire.
You can use this to determine when the user has selected the Silverlight content within
the browser.
Capturing Keyboard Input with the keyDown and keyUp Events
As only the root Canvas can receive focus, only the root canvas will receive these events.
The keyDown event will fire when a key is pressed and the Silverlight control has focus.
It raises two arguments: sender and keyEventArgs. The first parameter will always contain
a reference to the Canvas. The second will contain the necessary metadata to extract the
key information. It exposes the following properties:
keyEventArgs.key: This is an integer that represents the key that was pressed. It is
not operating system–specific. This uses a portable key code that is not operating
system–specific. The full key set is available in the SDK documentation.
keyEventArgs.platformKeyCode: This is an operating system-specific integer that represents
the key that was pressed.
keyEventArgs.shift: This is a Boolean that determines the state of the Shift key when
the key was pressed.
keyEventArgs.ctrl: This is a Boolean that determines the state of the Ctrl key when
the key was pressed.