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MainWindow.xaml.vb
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MainWindow.xaml.vb
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Imports DevExpress.Diagram.Core
Imports DevExpress.Xpf.Diagram
Imports System
Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Threading.Tasks
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Navigation
Imports System.Windows.Shapes
Namespace AttachedConnectors
''' <summary>
''' Interaction logic for MainWindow.xaml
''' </summary>
Partial Public Class MainWindow
Inherits Window
Public Sub New()
InitializeComponent()
End Sub
Private Sub DiagramDesignerControl_AddingNewItem(ByVal sender As Object, ByVal e As DevExpress.Xpf.Diagram.DiagramAddingNewItemEventArgs)
Dim connector As DiagramConnector = TryCast(e.Item, DiagramConnector)
If connector IsNot Nothing Then
connector.BeginPointRestrictions = ConnectorPointRestrictions.KeepConnected
connector.EndPointRestrictions = ConnectorPointRestrictions.KeepConnected
e.Cancel = connector.BeginItem Is Nothing OrElse connector.EndItem Is Nothing
End If
End Sub
Private Sub DiagramDesignerControl_BeforeItemsMoving(ByVal sender As Object, ByVal e As DiagramBeforeItemsMovingEventArgs)
e.Cancel = e.IsCopying AndAlso ListContainsDetachedConnectors(e.Items)
End Sub
Private Sub DiagramDesignerControl_ItemsPasting(ByVal sender As Object, ByVal e As DiagramItemsPastingEventArgs)
e.Cancel = ListContainsDetachedConnectors(e.Items.Select(Function(i) i.Item).ToList())
End Sub
Private Function ListContainsDetachedConnectors(ByVal items As IList(Of DiagramItem)) As Boolean
Return items.OfType(Of DiagramConnector)().Any(Function(c) Not items.Contains(c.BeginItem) OrElse Not items.Contains(c.EndItem))
End Function
End Class
End Namespace