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VB.NET VisualTreeHelper.HitTest方法代碼示例

本文整理匯總了VB.NET中System.Windows.Media.VisualTreeHelper.HitTest方法的典型用法代碼示例。如果您正苦於以下問題:VB.NET VisualTreeHelper.HitTest方法的具體用法?VB.NET VisualTreeHelper.HitTest怎麽用?VB.NET VisualTreeHelper.HitTest使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在System.Windows.Media.VisualTreeHelper的用法示例。


在下文中一共展示了VisualTreeHelper.HitTest方法的3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: OnMouseLeftButtonDown

' Respond to the left mouse button down event by initiating the hit test.
Private Overloads Sub OnMouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    ' Retrieve the coordinate of the mouse position.
    Dim pt As Point = e.GetPosition(CType(sender, UIElement))

    ' Perform the hit test against a given portion of the visual object tree.
    Dim result As HitTestResult = VisualTreeHelper.HitTest(myCanvas, pt)

    If result IsNot Nothing Then
        ' Perform action on hit visual object.
    End If
End Sub
開發者ID:VB.NET開發者,項目名稱:System.Windows.Media,代碼行數:12,代碼來源:VisualTreeHelper.HitTest

示例2: OnMouseRightButtonDown

' Respond to the right mouse button down event by setting up a hit test results callback.
Private Overloads Sub OnMouseRightButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
    ' Retrieve the coordinate of the mouse position.
    Dim pt As Point = e.GetPosition(CType(sender, UIElement))

    ' Clear the contents of the list used for hit test results.
    hitResultsList.Clear()

    ' Set up a callback to receive the hit test result enumeration.
    VisualTreeHelper.HitTest(myCanvas, Nothing, New HitTestResultCallback(AddressOf MyHitTestResult), New PointHitTestParameters(pt))

    ' Perform actions on the hit test results list.
    If hitResultsList.Count > 0 Then
        Console.WriteLine("Number of Visuals Hit: " & hitResultsList.Count)
    End If
End Sub
開發者ID:VB.NET開發者,項目名稱:System.Windows.Media,代碼行數:16,代碼來源:VisualTreeHelper.HitTest

示例3: MyHitTestResult

' Return the result of the hit test to the callback.
Public Function MyHitTestResult(ByVal result As HitTestResult) As HitTestResultBehavior
    ' Add the hit test result to the list that will be processed after the enumeration.
    hitResultsList.Add(result.VisualHit)

    ' Set the behavior to return visuals at all z-order levels.
    Return HitTestResultBehavior.Continue
End Function
開發者ID:VB.NET開發者,項目名稱:System.Windows.Media,代碼行數:8,代碼來源:VisualTreeHelper.HitTest


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