How to detect No mouse movement

SUNDAY, JUNE 8, 2008

How to detect NO mouse movement

In some occasions you might want to show or hide stuff in your Silverlight application when the visitor stopped moving his/her mouse.
For instance, most media players use this method to hide the play/pause/forward/mute controlbar.

You can achieve this by doing following this:

1. Create a DispatcherTimer

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1. private DispatcherTimer _nomousemoveTimer = new DispatcherTimer();  

2. Use the constructor of your class to create eventhandlers for events listed below and set the interval of the DispatcherTimer (in this case I set it to 3 seconds):

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1. this.MouseMove += new MouseEventHandler(Page_MouseMove);  
2. this.Loaded += new RoutedEventHandler(Page_Loaded);  
3. _nomousemoveTimer.Tick += new EventHandler(_nomousemoveTimer_Tick);  
4. _nomousemoveTimer.Interval = new TimeSpan(0, 0, 3);  

3. In the Page Loaded, start the timer:

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1. _nomousemoveTimer.Start();  

4. Now, in the Page_MouseMove event, stop the timer and start it immediately after stopping it:

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1. _nomousemoveTimer.Stop();  
2. _nomousemoveTimer.Start();  

5. Finally, in the Tick event of the timer, execute your code:

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1. private void _nomousemoveTimer_Tick(object sender, EventArgs e)  
2. {  
3.     //do your stuff  
4. }