TouchDevice.Capture Method

public:
 bool Capture(System::Windows::IInputElement ^ element);

public bool Capture (System.Windows.IInputElement element);

member this.Capture : System.Windows.IInputElement -> bool

Public Function Capture (element As IInputElement) As Boolean

Parameters

Returns

true if the element was able to capture the touch; otherwise, false.

Exceptions

Examples

The following example handles the TouchDown events that occur on a Canvas. When a touch is pressed on the Canvas, the TouchDevice is captured to the Canvas.

This example is part of a larger example that is available in the TouchDevice class overview.

private void canvas_TouchDown(object sender, TouchEventArgs e)
{
    Canvas _canvas = (Canvas)sender as Canvas;
    if (_canvas != null)
    {
        _canvas.Children.Clear();
        e.TouchDevice.Capture(_canvas);

        // Record the ID of the first touch point if it hasn't been recorded.
        if (firstTouchId == -1)
            firstTouchId = e.TouchDevice.Id;
    }
}

' Touch Down
Private Sub canvas_TouchDown(ByVal sender As System.Object, ByVal e As System.Windows.Input.TouchEventArgs)
    Dim _canvas As Canvas = CType(sender, Canvas)
    If (_canvas IsNot Nothing) Then
        _canvas.Children.Clear()
        e.TouchDevice.Capture(_canvas)

        ' Record the ID of the first touch point if it hasn't been recorded.
        If firstTouchId = -1 Then
            firstTouchId = e.TouchDevice.Id
        End If
    End If
End Sub

Remarks

A TouchDevice cannot be captured to an element if it is already captured to another element.

public:
 bool Capture(System::Windows::IInputElement ^ element, System::Windows::Input::CaptureMode captureMode);

public bool Capture (System.Windows.IInputElement element, System.Windows.Input.CaptureMode captureMode);

member this.Capture : System.Windows.IInputElement * System.Windows.Input.CaptureMode -> bool

Public Function Capture (element As IInputElement, captureMode As CaptureMode) As Boolean

Parameters

Returns

true if the element was able to capture the touch; otherwise, false.

Exceptions

Remarks

A TouchDevice cannot be captured to an element if it is already captured to another element.