Hi Thomas. I'd like your thoughts on how I will implement animation ticking. Currently (per the code currently in branches/anim), I have modified the RunnableQueue so that it has a Runnable that will be called when the queue is idle, thus avoiding some problems with unnecessarily flooding the queue with Runnables. (I may change this a bit eventually, though, so that busy waiting isn't done when no animations are active.) I came across a problem, though, where it seemed like the AWT event dispatcher thread was being starved of CPU, resulting in the canvas not being updated in a timely fashion sometimes. I've found that modifying the runnable to sleep the UpdateQueue thread for a tiny amount of time let the AWT thread get some time to update the canvas (see o.a.b.bridge.SVGAnimationEngine.AnimationTickRunnable).
With this example document: <svg xmlns="http://www.w3.org/2000/svg"; xmlns:xlink="http://www.w3.org/1999/xlink"; version="1.1" width="400" height="400"> <line x1="200" y1="0" x2="200" y2="400" stroke="red" stroke-width="150"/> <line id="Line1" x1="200" y1="0" x2="200" y2="400" stroke="black" stroke-width="50"> <animate attributeName="stroke-width" begin="0s" dur="5s" from="0" to="100" additive="sum"/> </line> <line id="Line2" x1="0" y1="200" x2="400" y2="200" stroke="orange" stroke-width="0"> <set attributeName="stroke-width" begin="5s" to="10"/> </line> </svg> if the Thread.sleep(1); line is removed, then at t = 10s, just as the 'animate' element finishes and the 'set' element begins, the display is not updated to revert Line1's width back to 50 and to show Line2 until a number of seconds afterwards. With the sleep line in, the update happens properly. So my question: is this thread sleeping an inappropriate way to get around the problem, and if so, any idea what a proper solution would be? Thanks, Cameron -- Cameron McCormack ICQ: 26955922 cam (at) mcc.id.au MSN: cam (at) mcc.id.au http://mcc.id.au/ JBR: heycam (at) jabber.org --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
