I have a need to create a diagram viewer. There is hierarchical tree that I want to visualize in Eclipse plugin. I manage to know GEF, and there is Zest. But in Zest, I don't success in creating custom shape in graphic nodes and there is no tutorial to create the custom node (I have been searching all day). So I want to know if there are alternatives beside Zest. What I like most from Zest is it provides layouting algorithms.
Do you need to edit that tree? If not, I would use the Zest framework.
This might help you to create the custom shape.