本文整理汇总了VB.NET中System.Windows.Media.HitTestResultCallback代理的典型用法代码示例。如果您正苦于以下问题：VB.NET HitTestResultCallback代理的具体用法？VB.NET HitTestResultCallback怎么用？VB.NET HitTestResultCallback使用的例子？那么恭喜您, 这里精选的代理代码示例或许可以为您提供帮助。
在下文中一共展示了HitTestResultCallback代理的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
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