Originally I have written the attached test program to compare the
rendering performance of various shape types but finally this program
unveiled a lot of other problems which I want to report here.


ToolBar items not updated
-------------------------------------

When I start the program everything seems to be fine at the beginning.
The program shows a tool bar and a drawing area with a lot of triangles.
The tool bar contains two toggle buttons. The first one toggles between
triangles and rectangles. If I hit this toggle button several times
(10 - 20 times on my machine) the visual state indication of the button
does not change anymore although the toggling itself still works.
Also the blue focus indication does not change anymore when I select
for example the first text box. When I finally change the window size
slightly everything goes back to normal.


ScrollEvents are swallowed when animation is running.
----------------------------------------------------------------------------

You can zoom in and out in the drawing area via the mouse wheel.
But when you start the animation a lot of scroll events seem to
be swallowed. Sometimes it works, sometimes there are no events
at all. The behavior is somewhat unpredictable but all in all
the zoom experience is very bad.


Maximizing window does not trigger change listener.
-------------------------------------------------------------------------

When the window is resized the graphics is adjusted
to always fill the whole drawing area. This is triggered
by a change listener on the graphicsPane. This seems to
work nicely when I adjust the window size manually with the
mouse. But if I hit the maximize button in the upper right
corner of the window this does not seem to trigger the
change listener, which I do not understand. (This works
if I attach the listener to the drawingPane instead.)
Even worse, when I hit the button again to go back to
the original size, the application dies with a StackOverflowError.
See attached file 'rsize_exception.txt'.


Not setting the clipping rectangle crashes application
------------------------------------------------------

In order not to draw outside of the bounds of the drawingPane
I set a clipping Rectangle. This works nicely although it is
a bit of a pain that we still have to do that manually.
But even worse if you don't do that the whole application
crashes at startup caused by a StackOverfowError. I'd rather
expect some drawing artifacts on the tool bar but not a crash
of the application.


Conclusion
----------------

There may be bugs in my code (although in general it seems to
work correctly) or there may be alternative ways to implement
the desired behavior but I am a bit astonished to see how
sensitive JavaFX is.

Ah, and finally, are there any plans for the next release to
improve the rendering performance of path based shapes? At the
moment you cannot even render simple triangles with an acceptable
speed. For the triangle case the performance is 3-5 times better if
you run the application with -Dprism.order=j2d