Edit itemDataArray before links drawing

@llopht wrote:

I want to add new links data properties (with computed value) in a linkDataArray before it was draw by the diagram. Is the only solution is to add a listener on the modelChangedListener and to modify each links after the end of the transaction ? Something like that (not tested) :

myDiagram.model = () => {
  return this.go(go.GraphLinksModel, {
     linkDataArray: [ { from: '1', to: '2' } ]
     ...
  });
}

myDiagram.addModelChangedListener((e) => {
    if (e.model instanceof go.GraphLinksModel &&  e.isTransactionFinished) {
        e.model.linkDataArray.forEach((link) => {
            e.model.setDataProperty(link, 'stroke', '#FF0000');
        });
    }
});

myDiagram.linkTemplate = () => {
  return this.go(go.Link, {
      /* remove to simplify */
    },
    this.go(go.Shape, {
      /* remove to simplify */
    }),
    new go.Binding('stroke', 'stroke'),
  );
}

Is this correct ?

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