Node count when creating nodes with stencil dragging

[tealer]

How to achieve the following functions when using stencil?

For example, I am using stencil to create a new node on the diagram by dragging, if this is the third node I created by dragging from stencil, set the ID of this node to "3".

[Deepa Thiruppathy]

Hi Tealer,

Requirement: How to calculate and update node’s count when node is drag and dropped from stencil

We have achieved this requirement by using ItemAddedEvent and its arguments. When node is drag and dropped from stencil, ItemSource argument of event will be updated as Stencil.

Code snippet:

//item added event.

(diagram.Info as IGraphInfo).ItemAdded += MainWindow_ItemAdded;

//To hold node count.

int nodeCount = 0;

 

private void MainWindow_ItemAdded(object sender, ItemAddedEventArgs args)

{

    //checking added item is node and whether it is added from stencil

    if (args.Item is NodeViewModel && args.ItemSource == ItemSource.Stencil)

    {

        nodeCount += 1;

        NodeViewModel node = args.Item as NodeViewModel;

        node.ID = nodeCount.ToString();

        //Initialize the AnnotationCollection

        node.Annotations = new ObservableCollection<IAnnotation>()

        {

            //adding node ID value as annotation.

            new AnnotationEditorViewModel()

            {

                Content=node.ID,

            }

        };

    }

}

Sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/StencilDiagramElements961557993

Regards,

Deepa Thiruppathy

[tealer]

Thanks for solving my problem, it works great.

[Deepa Thiruppathy]

You are welcome. Please let us know if you require any further assistance.