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我有以下问题:当画布中的项目被选中(将被擦除)时,滚动查看器总是重置为0:这是由于示例代码中的焦点。如果焦点()被删除,ScrollViewer中是好,但所选择的项目现在不能被擦除>WPF:避免画布滚动查看器重置
Mainwindow.Xaml代码:
<Border Grid.Row="1" BorderThickness="1" BorderBrush="Navy" Margin="2" Padding="2" >
<ScrollViewer Name="Posizione_scrollbar" HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
Protected Overrides Sub OnPreviewMouseDown(ByVal e As System.Windows.Input.MouseButtonEventArgs)
MyBase.OnPreviewMouseDown(e)
' usual selection business
Dim designer As DesignerCanvas = TryCast(VisualTreeHelper.GetParent(Me), DesignerCanvas)
If designer IsNot Nothing Then
If (Keyboard.Modifiers And (ModifierKeys.Shift Or ModifierKeys.Control)) <> ModifierKeys.None Then
If Me.IsSelected Then
designer.SelectionService.RemoveFromSelection(Me)
Else
designer.SelectionService.AddToSelection(Me)
End If
ElseIf Not Me.IsSelected Then
If MainViewModel.Instance.ActiveDiagram.STMonitor = False Then
designer.SelectionService.SelectItem(Me)
End If
End If
'Here is the problem: the canvas scrollbar is resetted to 0!
Me.Focus()
End If
'True per avere la gestione col tasto sinistro del mouse
e.Handled = True
End Sub
太棒了,这正是我需要的+1。按照建议在我的画布'RequestBringIntoView'中设置'e.Handled = true',它可以很好地工作 – RobJohnson 2013-03-28 10:59:28