I couldn't find any solution for my problem yet. I'm using EMF with an JFace Treeviewer. As it is annoying to click through the whole tree every time, I would like to expand all children automaticallywhen I click on a nodes arrow (the image left of a nodes label). I found this article (http://www.vogella.com/articles/EclipseJFaceTree/article.html), but the suggested solution at point 2.2 didn't work. Can someone help me with this?