this may or not help, but you appear to have the same issues as we
did and we solved it in the following way (which works on all
supported platforms including OS X since 10.0!)
We have a main JFrame, containing a JPanel.
We keep an offscreen BufferedImage, and an onscreen BufferedImage.
Changes are made to the offscreen image, and then using
graphics.setClip() we paint only the changed area in paintComponent()
for the JPanel.
To eliminate offbyone pixel errors when plotting to the screen all
coordinates are stored scaled to a 64K grid, and a working set is
kept that are scaled to the client area (I guess in your case your
reference-points are the ones in the file here, but the important
thing is to rescale from a reference set not from the working set -
otherwise any lines drawn on the screen appear to jump around if the
client area is repeatedly resized)
When the client area dimensions are changed we recreate the off- and
on-screen images, recreate the working points from the reference
points and draw them to the offscreen image, then setClip() to the
size of the JPanel to "blt" the entire image.
We have found this to be the fastest way of displaying data in real-
time - and since JVM1.5 OS X (both Tiger and Leopard) is actually
faster than Win32. As always, the important thing is to repaint only
the smallest possible area.
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