Suppose user has drawn a standard flowchart using a GEF digram. Now via code we want to understand what diagrams are drawn in what order. I want to know is it possible to do that? If yes how?
When you use GEF with MVC pattern, you create and modify a Model which results in drawing the View. You can then query the Model for the things you want. The learning curve is quite steep, however.
Alternatively you can use the Sirius project to model your graph type and generate it all for you.