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see BPEL Diagram for sample of realization, current overview window show full scene view, but with quite big diagrams you can see nothing because all objects and lines are collapsed at very limited area it also affect performance because overview draw all object of big scene at once I suggest to realize separate BirdSatelliteView or add support to current satellite view to show only reasonable part of scene (for example 3x of current main view or configurable number) but still with ability to scroll to any part of scene in this view.
Created attachment 45848 [details] Patch
A patch has been added. The view can be created by Scene.createBirdView().show(). The test.bird.BirdViewTest example has been added. Asking for fast API review.
Fixed in main trunk.
If I got it right It's a magnifier instead of bird view which should be some view between curent diagram view and satellite(full scene) view.
I assume you would like to have a current bird view but the view must not be implemented as a window that tracks mouse cursor. Instead it should be a JComponent that could be used similarly to satellite view. If so, we should probably leave this issue as resolved since it passed through the API review and create a new one. The new feature should be available just by introducing a new Scene.createBirdSatelliteView method.
Ok, to change summary and mark s resolved with submitting new issue