本文整理汇总了VB.NET中System.Windows.Media.VisualTreeHelper.GetDrawing方法的典型用法代码示例。如果您正苦于以下问题：VB.NET VisualTreeHelper.GetDrawing方法的具体用法？VB.NET VisualTreeHelper.GetDrawing怎么用？VB.NET VisualTreeHelper.GetDrawing使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Media.VisualTreeHelper的用法示例。
在下文中一共展示了VisualTreeHelper.GetDrawing方法的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: HitTestGeometryInVisual
' Determine if a geometry within the visual was hit.
Public Shared Sub HitTestGeometryInVisual(ByVal visual As Visual, ByVal pt As Point)
' Retrieve the group of drawings for the visual.
Dim drawingGroup As DrawingGroup = VisualTreeHelper.GetDrawing(visual)
EnumDrawingGroup(drawingGroup, pt)
End Sub
' Enumerate the drawings in the DrawingGroup.
Public Shared Sub EnumDrawingGroup(ByVal drawingGroup As DrawingGroup, ByVal pt As Point)
Dim drawingCollection As DrawingCollection = drawingGroup.Children
' Enumerate the drawings in the DrawingCollection.
For Each drawing As Drawing In drawingCollection
' If the drawing is a DrawingGroup, call the function recursively.
If drawing.GetType() Is GetType(DrawingGroup) Then
EnumDrawingGroup(CType(drawing, DrawingGroup), pt)
ElseIf drawing.GetType() Is GetType(GeometryDrawing) Then
' Determine whether the hit test point falls within the geometry.
If (CType(drawing, GeometryDrawing)).Geometry.FillContains(pt) Then
' Perform action based on hit test on geometry.
End If
End If
Next drawing
End Sub