Eclipse RCP using Nebula - Action taking snapshots looping over several editor's pages

Question

I have a Java - Eclipse RCP application. The Editor has several pages, some of which contain nebula.XYGraph graphs. The toolbar has an Action, which loops over these pages to take a snapshot of each graph. In the loop, I retrieve the page, use editor.setActivePage(index of the page) so the page should be displayed/refreshed, then call page.doSnapshot().

However, several problems happen:

• setActivePage() does not display the page, ie the user does not see the switching of pages one after another. It is like the run of the Action is locking/freezing the Editor UI, and when reaching the end of the loop, only the last page is finally displayed.
• As the graphs have not been displayed, some of their components (Annotations for example), are not correctly displayed/positioned. So the produced snapshots are incorrect. Graphs are correct only if the user himself has already opened the page one time before doing the Action.

I tried:

• modifying the order of functions calls during the loop
• using Thread.sleep() to let the pages have more time to display
• Action using a Job, so one page is managed at a time
• using the editor.setActivePage() when doing the editor.addPage(), so pages should be displayed one time at their creation (but as the pages are added in a loop again, there is no refresh/switching of pages in the UI)
• set the graph's Annotation position, and other manipulation on the XYGraph. Nothing worked...