Applies to: Nevron Diagram for .NET
How to inherit and use a custom line connector in Nevron Diagram?
The right way to create your own type of connector is to override the CreateElement method of the connector tool. In fact it currently only calls the respective methods of the diagram elements factory of the view, which simply creates a new instance of the desired element:
[C#]
protected override INDiagramElement CreateElement(bool preview)
{
NDiagramElementFactory factory = m_View.ElementFactory;
switch (m_ConnectorType)
{
case ConnectorType.Line:
return factory.CreateLineConnector(preview);
case ConnectorType.Bezier:
return factory.CreateBezierConnector(preview);
case ConnectorType.SingleArrow:
return factory.CreateArrowConnector(preview, ArrowType.SingleArrow);
case ConnectorType.DoubleArrow:
return factory.CreateArrowConnector(preview, ArrowType.DoubleArrow);
case ConnectorType.SideToTopBottom:
return factory.CreateStep2Connector(preview, false);
case ConnectorType.TopBottomToSide:
return factory.CreateStep2Connector(preview, true);
case ConnectorType.SideToSide:
return factory.CreateStep3Connector(preview, false);
case ConnectorType.TopToBottom:
return factory.CreateStep3Connector(preview, true);
case ConnectorType.DynamicHV:
return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicHV);
case ConnectorType.DynamicPolyline:
return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicPolyline);
case ConnectorType.DynamicCurve:
return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicCurve);
default:
Debug.Assert(false, "New connector type?");
break;
}
return null;
}
[VB.NET]
Protected Overrides Function CreateElement(preview As Boolean) As INDiagramElement
Dim factory As NDiagramElementFactory = m_View.ElementFactory
Select Case m_ConnectorType
Case ConnectorType.Line
Return factory.CreateLineConnector(preview)
Case ConnectorType.Bezier
Return factory.CreateBezierConnector(preview)
Case ConnectorType.SingleArrow
Return factory.CreateArrowConnector(preview, ArrowType.SingleArrow)
Case ConnectorType.DoubleArrow
Return factory.CreateArrowConnector(preview, ArrowType.DoubleArrow)
Case ConnectorType.SideToTopBottom
Return factory.CreateStep2Connector(preview, False)
Case ConnectorType.TopBottomToSide
Return factory.CreateStep2Connector(preview, True)
Case ConnectorType.SideToSide
Return factory.CreateStep3Connector(preview, False)
Case ConnectorType.TopToBottom
Return factory.CreateStep3Connector(preview, True)
Case ConnectorType.DynamicHV
Return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicHV)
Case ConnectorType.DynamicPolyline
Return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicPolyline)
Case ConnectorType.DynamicCurve
Return factory.CreateRoutableConnector(preview, RoutableConnectorType.DynamicCurve)
Case Else
Debug.Assert(False, "New connector type?")
Exit Select
End Select
Return Nothing
End Function
Article ID: 31, Created On: 10/5/2010, Modified: 11/15/2010