Adding Sequence Flow to BPMN2 Editor

Question

I am developing BPMN2 Editor using GEF. I have BPMN2 EMF Models. When I add SequcenFlow to My Editor it creates fine,But after that I cant able to any more BPMN Shapes in GEF Editor. I got Exception in IndexOutOfBoundsException in that processing getContentPane().add(child, index).

Answer 1

Why are you using getContentPane()? your children should be added to the model which is then read by the framework. Can you post some code?