UIElement.CaptureMouse Method
Attempts to force capture of the mouse to this element.
Assembly: PresentationCore (in PresentationCore.dll)
To be captured, an element must be enabled. Check whether IsEnabled is true before you call CaptureMouse.
If calling CaptureMouse returns true, then IsMouseCaptured is also true.
If calling CaptureMouse returns true, then the GotMouseCapture and IsMouseCapturedChanged events are raised, with RoutedEventArgs.Source in the event data reported as the element where the CaptureMouse method is called. If you force capture, you might interfere with existing captures—especially with captures that relate to drag-and-drop with the mouse.
To clear mouse capture from all elements, call Mouse.Capture with the element parameter provided as Nothing.
The following example implements a pair of handlers for mouse and key input combination that capture (and uncapture) the mouse and enable a special mouse mode for viewing a 3D model.
Private Sub MouseDownHandler(ByVal sender As Object, ByVal e As MouseButtonEventArgs) If Not Enabled Then Return End If e.Handled = True If Keyboard.IsKeyDown(Key.F1) = True Then Reset() Return End If Dim el As UIElement = CType(sender, UIElement) _point = e.MouseDevice.GetPosition(el) ' Initialize the center of rotation to the lookatpoint If Not _centered Then Dim camera As ProjectionCamera = CType(_slaves(0).Camera, ProjectionCamera) _center = camera.LookDirection _centered = True End If _scaling = (e.MiddleButton = MouseButtonState.Pressed) If Keyboard.IsKeyDown(Key.Space) = False Then _rotating = True Else _rotating = False End If el.CaptureMouse() End Sub Private Sub MouseUpHandler(ByVal sender As Object, ByVal e As MouseButtonEventArgs) If Not _enabled Then Return End If e.Handled = True ' Stuff the current initial + delta into initial so when we next move we ' start at the right place. If _rotating = True Then _rotation = _rotationDelta * _rotation Else _translate += _translateDelta _translateDelta.X = 0 _translateDelta.Y = 0 End If '_scale = _scaleDelta * _scale Dim el As UIElement = CType(sender, UIElement) el.ReleaseMouseCapture() End Sub
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.