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OnTouchDown Method

[This documentation is for preview only, and is subject to change in later releases. Blank topics are included as placeholders.]

Handles a touch down (or stylus down) event.

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

Syntax

'Declaration
Protected Overridable Sub OnTouchDown ( _
    e As TouchEventArgs _
)
protected virtual void OnTouchDown(
    TouchEventArgs e
)
protected:
virtual void OnTouchDown(
    TouchEventArgs^ e
)
abstract OnTouchDown : 
        e:TouchEventArgs -> unit 
override OnTouchDown : 
        e:TouchEventArgs -> unit 
protected function OnTouchDown(
    e : TouchEventArgs
)

Parameters

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 re-raise the event in most cases.

.NET Framework Security

See Also

Reference

UIElement Class

Microsoft.SPOT.Presentation Namespace