Demetrio Cassarino
57 lines
2.2 KiB
VB.net
57 lines
2.2 KiB
VB.net
Module TreeHelperManager
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Public Function FindVisualParent(Of T As DependencyObject)(ByVal child As DependencyObject) As T
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Dim parentObject As DependencyObject = VisualTreeHelper.GetParent(child)
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If parentObject Is Nothing Then Return Nothing
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Dim parent As T = TryCast(parentObject, T)
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If parent IsNot Nothing Then
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Return parent
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Else
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Return FindVisualParent(Of T)(parentObject)
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End If
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End Function
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Public Function FindVisualTwoParent(Of T As DependencyObject, U As DependencyObject)(ByVal child As DependencyObject) As Object
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Dim parentObject As DependencyObject = VisualTreeHelper.GetParent(child)
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If parentObject Is Nothing Then Return Nothing
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If TypeOf parentObject Is T Then
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Return parentObject
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ElseIf TypeOf parentObject Is U Then
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Return parentObject
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Else
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Return FindVisualTwoParent(Of T, U)(parentObject)
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End If
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End Function
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Public Function FindVisualParents(Of T As DependencyObject, U As DependencyObject, V As DependencyObject)(ByVal child As DependencyObject) As Object
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Dim parentObject As DependencyObject = VisualTreeHelper.GetParent(child)
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If parentObject Is Nothing Then Return Nothing
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If TypeOf parentObject Is T Then
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Return parentObject
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ElseIf TypeOf parentObject Is U Then
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Return parentObject
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ElseIf TypeOf parentObject Is V Then
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Return parentObject
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Else
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Return FindVisualParents(Of T, U, V)(parentObject)
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End If
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End Function
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' Funzione per trovare un controllo figlio nel Visual Tree
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Public Function FindVisualChild(Of T As DependencyObject)(parent As DependencyObject) As T
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Dim childCount As Integer = VisualTreeHelper.GetChildrenCount(parent)
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For i As Integer = 0 To childCount - 1
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Dim child As DependencyObject = VisualTreeHelper.GetChild(parent, i)
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If TypeOf child Is T Then
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Return DirectCast(child, T)
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Else
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Dim foundChild As T = FindVisualChild(Of T)(child)
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If foundChild IsNot Nothing Then Return foundChild
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End If
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Next
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Return Nothing
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End Function
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End Module
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