Problem with setLocation in a multi screen environment

Question

hello,
I'm using a multiple screen environment (matrox graphicccard, 3 screens).
I've a application moving some JDialogs to screen-locations saved somewhen before. So far so good.
getLocation () for my left screen delivers me a negative value:
e.g. getLocation().x = -150
getLocation().y = 50
setLocation (-150, 50) works as expected.
Ok, but if I use the same application on another workstation using another matrox driver, the dialog disappears.
On my computer the 3 screens are handled as separate screens (the one in the middle as the mainscreen) => 3x1024x768
JDialogs on the left screen are given negative x-location values, JDialogs on the right screen have x-location values greater than 1024.
On the other computer the 3 screens are handled as one big desktop => 1x3072x1024 (as said: other matrox device).
My problem is now: if I transfer my locations stored in an external config-file somewhere else I can't restore the location on the other computer, seems clearly there is no negative screen with this graphiccard.
I tried following code
     public void setLocation (int x, int y)  {
          GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
          Dimension screenSize;
          try  {
               Rectangle screenS = new Rectangle ();
               GraphicsDevice[] gs = ge.getScreenDevices ();
               for (int j = 0; j < gs.length; j++) {
                    GraphicsDevice gd = gs[j];
                    GraphicsConfiguration[] gc = gd.getConfigurations();
                    for (int i=0; i < gc.length; i++) {
                         screenS = screenS.union(gc.getBounds());
               screenSize = screenS.getSize ();
          } catch (HeadlessException e) {
               screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
          if (x > screenSize.width) {
               x = screenSize.width-getSize().width;
          if (y > screenSize.height) {
               y = screenSize.height-getSize().height;
          super.setLocation (x, y);
but it doesn't help. By the way: I can't (!) check in this function for negative x-values because computer 1 allows negative x-values, computer 2 NOT.
I need something to get out if a x,y-location is situated in a viewable screencontent AND this should work on every computer.....
any help would be great
Thanks a lot

Answer 1

Has anyone solved this problem yet? I've tried several variants in the call to Frame's getMaximizeBounds() and cannot reliably get it to work. For one particular monitor setup (1280x1024, 1024x1280, and 1024x1280), I can find the magic numbers to make it maximize across both 1024x1280 monitors.
For my scenario, the left monitor is 1280x1224 and is primary, the other two are used to run the Java application. When maximized, it should take over the complete 2048x1280 space of both portrait monitors (middle and right monitors). When not maximized (in NORMAL mode), it the window takes over the space of the middle 1024x1280 monitor.
To make it work, I use the following call:
// x = 0, y = 1, width = 2304, and height = 1280
m_windowFrame.setMaximizedBounds(new Rectangle(0,1,2304, 1280));
- if "y" is 0, which I would expect should be ok, the maximize defaults to having as if I pass in null (it maximized to only one monitor).
- if "width" is the correct amount (2048), it doesn't use all the space of both portrait monitors. For some reason, if I use with width of the primary and the width of one portrait, it works.
This doesn't make a bit of sense why these number works. If someone can shed light on how this call works, I would very much appreciate it.
Thank you