Stylus.PreviewStylusDown Attached Event
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Occurs when user touches the tip of the stylus to the tablet.
see AddPreviewStylusDownHandler, and RemovePreviewStylusDownHandlersee AddPreviewStylusDownHandler, and RemovePreviewStylusDownHandlersee AddPreviewStylusDownHandler, and RemovePreviewStylusDownHandlerExamples
The following example demonstrates how to ensure that the stylus is not captured when the user touches the stylus to the tablet. This example assumes that the PreviewStylusDown event is connected to the event handler.
void Window1_PreviewStylusDown(object sender, StylusEventArgs e)
{
IInputElement capturedElement = Stylus.Captured;
if (capturedElement != null)
{
capturedElement.ReleaseStylusCapture();
}
}
Private Sub Window1_PreviewStylusDown(ByVal sender As Object, ByVal e As StylusDownEventArgs) _
Handles Me.PreviewStylusDown
Dim capturedElement As IInputElement = Stylus.Captured
If Not (capturedElement Is Nothing) Then
capturedElement.ReleaseStylusCapture()
End If
End Sub
Remarks
This is an attached event. WPF implements attached events as routed events. An attached event is, fundamentally, a XAML language concept used to reference events that are handled on objects that do not, themselves, define events. WPF further expands an attached event's capabilities, allowing it to traverse a route. Attached events do not have a direct handling syntax in code; to attach handlers for a routed event in code, use a designated Add*Handler method. For details, see Attached Events Overview.
Routed Event Information
| Identifier field | PreviewStylusDownEvent |
| Routing strategy | Tunneling |
| Delegate | StylusDownEventHandler |
