How to change default properties when adding shape or line with ActivateTool of diagram?

Question

Hi~I used to run the demo you provided.I read the demo code and it calls ActivateTool method.The background color of the shape is yellow by default.I want to change the default properties such as line weight, color or background color of the shape.How can I change the default properties?

Gowtham Gunashekar · Accepted Answer

Hi Nam, 
 
we suggest you to use Diagram NodeCollectionChanged event to update modify the default color, line style of the node/connector while adding the nodes 
 
Code snippet: 
 




 
     diagram1.EventSink.NodeCollectionChanged += EventSink_NodeCollectionChanged; 
 
 
 
        private void EventSink_NodeCollectionChanged(CollectionExEventArgs evtArgs) 
        { 
           if(evtArgs.ChangeType == CollectionExChangeType.Insert) 
            { 
                if(evtArgs.Element is FilledPath) 
                { 
                      // to change  
                    (evtArgs.Element as FilledPath).FillStyle.Color = Color.Brown; 
                } else if(evtArgs.Element is ConnectorBase) 
                { 
                    (evtArgs.Element as ConnectorBase).LineStyle.LineColor = Color.Red; 
                } 
            } 
        } 
 
 
Regards, 
 
Gowtham