本文整理匯總了VB.NET中System.Windows.Media.HitTestResultCallback代理的典型用法代碼示例。如果您正苦於以下問題：VB.NET HitTestResultCallback代理的具體用法？VB.NET HitTestResultCallback怎麽用？VB.NET HitTestResultCallback使用的例子？那麽, 這裏精選的代理代碼示例或許可以為您提供幫助。
在下文中一共展示了HitTestResultCallback代理的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: HitTestResultCallback
' Capture the mouse event and hit test the coordinate point value against
' the child visual objects.
Private Sub MyVisualHost_MouseLeftButtonUp(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
' Retrieve the coordinates of the mouse button event.
Dim pt As Point = e.GetPosition(CType(sender, UIElement))
' Initiate the hit test by setting up a hit test result callback method.
VisualTreeHelper.HitTest(Me, Nothing, New HitTestResultCallback(AddressOf myCallback), New PointHitTestParameters(pt))
End Sub
' If a child visual object is hit, toggle its opacity to visually indicate a hit.
Public Function myCallback(ByVal result As HitTestResult) As HitTestResultBehavior
If result.VisualHit.GetType() Is GetType(DrawingVisual) Then
If (CType(result.VisualHit, DrawingVisual)).Opacity = 1.0 Then
CType(result.VisualHit, DrawingVisual).Opacity = 0.4
Else
CType(result.VisualHit, DrawingVisual).Opacity = 1.0
End If
End If
' Stop the hit test enumeration of objects in the visual tree.
Return HitTestResultBehavior.Stop
End Function