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UIElement.OnTouchDown Method

  • Article

Handles a touch down (or stylus down) event.

Namespace: Microsoft.SPOT.Presentation
Assembly: Microsoft.SPOT.TinyCore (in microsoft.spot.tinycore.dll)

Syntax

protected virtual void OnTouchDown (
         TouchEventArgse
)

Parameters

  • e
    The TouchDownEventArgs that contains the event data.

Remarks

This method is invoked when an unhandled TouchDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.

This method has no default implementation. Because an intermediate class in the inheritance might implement this method, we recommend that you call the base implementation in your implementation.

The purpose of this method is similar to the common language runtime (CLR) event pattern On* methods: this method provides the means to handle the matching event from derived classes by establishing a class handler instead of an instance handler. In this case the matching event is a routed event. The implementation pattern of the On* methods is different for routed events because a routed event can be raised by a child element, which is not necessarily the element that will invoke handlers. Therefore, your implementation needs to examine the source properties of the event data. It should not try to reraise the event in most cases.

Version Information

Available in the .NET Micro Framework versions 4.0 and 4.1.

See Also

Reference

UIElement Class
UIElement Members
Microsoft.SPOT.Presentation Namespace