Search code examples
javaswinganimationappletedt

Active rendering and the EDT (Swing animation)

How should I run animation in a Swing applet?

I have an animation thread performing active rendering and it initially animates fine. Sometimes (anywhere from 1 minute to 2 hours later) it begins to fail to update the screen and only the sounds occur. I believe this is due to the fact that the paint is not performed from the EDT causing some kind of concurrency problem.

So, should the active rendering (ie getGraphics() and painting) be called only from the EDT? A problem with this is the Swing timer lacks precision.

Or has anyone had success with active rendering without using the EDT, and completely disabling any EDT updates to the page (maybe using Canvas / or ignore repaint on a JPanel)?

Solution

  • You can paint graphics into your own off-screen image in another thread and copy to the screen in the EDT. But for single threaded stuff, I would hope your frame rate is high enough to be able to do it in the EDT.