Help with BufferedImage - Graphics updating
Hello All-
I will try to explain the best I can, still new to Java2D so little confused
Hopefully the explanation makes a little bit of sense....
I have a tabbedPane, one tab with no graphics and the other tab full of graphics
The tab with the graphics on it is basically a bunch of rectangles that will change color depending on real time data I am pulling from a Mysql DB
For sake of performance I only want to have to repaint those rectangles when the data from the DB changes (i.e. repaint the rectangles when the bit changes from 1=good to 0=bad)
Any help on how to start implementing this would be absolutely wonderful
or if I could explain something any better please ask.
Thank you in advance
Janduzerbots
You could check out the java.util.TimerTask class... you could set it up so that every ten seconds (or whatever), your TimerTask checks the latest values in the database and updates your graphics accordingly. It's not truly real-time, though, since you have to poll the database every X seconds.
Thank you very much!!! for the help on where to get myself started
but as I look into the DoubleBuffering
I run into a little bit of confusion because of the two tabs
still a little new to the whole java 2D
Is it necessary to implement the graphics tab (vs the pure data tab)
in a separate class or inner class,
or is it easy enough to just apply all of the DoubleBuffering Image implementation
to the graphics panel and only the graphics panel without a separate class?
Thanx
-Janduzerbots
If you're thinking of just grabbing the graphics image of some component on the fly for rendering, that
wouldn't work well. Here is a [url=http://forum.java.sun.com/thread.jsp?forum=54&thread=529542&start=5]link[/url] to some tips on doing your own drawing.
Again, yes, you may have to define your own component class. The only other alternative I can think of is to have a JLabel
that has an ImageIcon that holds your BufferedImage, and you update this by calling repaint after updating
the BufferedImage.
