Assembly: PresentationFramework (in presentationframework.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
'Declaration Public Event PreviewMouseDoubleClick As MouseButtonEventHandler 'Usage Dim instance As Control Dim handler As MouseButtonEventHandler AddHandler instance.PreviewMouseDoubleClick, handler
/** @event */ public void add_PreviewMouseDoubleClick (MouseButtonEventHandler value) /** @event */ public void remove_PreviewMouseDoubleClick (MouseButtonEventHandler value)
In JScript, you can handle the events defined by a class, but you cannot define your own.
Although this routed event seems to follow a tunneling route through an element tree, it actually is a direct routed event that is raised along the element tree by each UIElement. If you set the Handled property to true in a PreviewMouseDoubleClick event handler, subsequent PreviewMouseDoubleClick events along the route will occur with Handled set to false, but the MouseDoubleClick will occur with Handled set to true. This is a higher-level event for control consumers who want to be notified when the user double-clicks the control and handle in an application.
Control authors who want to handle mouse double clicks should use the PreviewMouseLeftButtonDown event when ClickCount is equal to two. This will cause the state of Handled to propagate appropriately in the case where another element in the element tree handles the event.
The Control class defines the PreviewMouseDoubleClick and MouseDoubleClick events, but not corresponding single-click events. To see if the user has clicked the control once, handle the MouseDown event (or one of its counterparts) and check whether the ClickCount property value is 1.
The following example shows how to attach an event handler the PreviewMouseDoubleClick event.
<Button Name="btn1" Foreground="Black" PreviewMouseDoubleClick="ChangeForeground"> Foreground </Button>
The following example shows the event handler of the PreviewMouseDoubleClick event.
Sub ChangeForeground(ByVal Sender As Object, ByVal e As System.Windows.Input.MouseButtonEventArgs) If (btn1.Foreground Is Brushes.Green) Then btn1.Foreground = Brushes.Black btn1.Content = "Foreground" Else btn1.Foreground = Brushes.Green btn1.Content = "Control foreground(text) changes from black to green." End If End Sub
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.