Re: [platform-swt-dev] SWT JRE 1.5.0 Mac PowerPc

["Vinh Hoang" <llvinhll@xxxxxxxxx>]

Ok, I didn't know it worked in windows but not on macs.  I thought you just ran it on mac.  Although it should either work on both or not, according to your stacktrace,  I really haven't developed on macs, so I could be wrong.  so much for write once, run anywhere. Anyways UI thread is the user interface thread, thread that control access to all your swt widgets and controls.  


Vinh

On Thu, Nov 13, 2008 at 11:27 AM, Romuald Quantin <soundstep.mailing@xxxxxxxxxxxxxx> wrote:

Hi Vinh

Hmm I'm not sure I understand... First question is, why does it works on windows and not mac then?

Maybe it is not how I should do (sorry I'm both SWT and java beginner) but I create a main form in the class entry point like that:

/public static void main(String[] args) {
      app = new AppMain();
  }
 public AppMain() {
      mainForm = new MainForm(this);
      mainForm.init();
}/

and then in the MainForm.init(), I do:

/ shell.setLayout(new FillLayout());       shell.setSize (800, 600);
shell.open();
displayGlobalSettingsForm();
while (!shell.isDisposed()) {
  if (!display.readAndDispatch()) {
      display.sleep();
  }
}
if(appGlobalSettings.isDirty()) {
  appGlobalSettings.save();
}
display.dispose();    /

Is that wrong?

Sorry I dont know what's a UI thread... and I'm not sure what you mean by modifying the UI. I see my app and I got my first error when I set a path with a browse button, on mac the finder to select the path appears and then I see the error in the terminal. While I have none in windows.

What can I do? and do you have some example somewhere of how I should properly do things?

Thanks again for your help.

Romu

Vinh Hoang wrote:

In swt, there's only one UI thread.  Meaning all things modify the UI in some form must go through that one thread.  That thread is usually where you created your display object.  You're getting invalid thread access, it means that you are trying to modify the UI in a non-UI thread.  In order to modify the UI thread, you need to do something like
Display.getDefault().asyncExec(new Runnable(){
 public void run(){
    //modify ui Code
 }
};

I hope that helps. good luck
Vinh

On Thu, Nov 13, 2008 at 10:36 AM, Romuald Quantin <soundstep.mailing@xxxxxxxxxxxxxx <mailto:soundstep.mailing@xxxxxxxxxxxxxx>> wrote:

   Hi everyone,

   First post :)

   I hope I can find a bit of help. I'm a flash developer (sorry
   about that), and I'm building an application with SWT.

   So, I'm fairly new to java but the job is almost done. I've
   exported an executable jar and when I tried it on Mac (10.4.1) it
   didn't work.

   I realized I couldn't install the last JRE on a Mac PowerPC... so
   back to my windows PC, I installed a JRE 1.5.0, created a new
   workspace in eclipse with JRE 1.5.0, set a new project again with
   JRE 1.5.0 and export again my executable jar.

   When I tried it on the mac, it is getting better as I can see my
   app! But I've got bugs with it and it is not working at all. I've
   pasted an example error I got below. As I'm fairly new to java, I
   dont know what I can do. I believe the SWT jar I use is too
   advanced for the JRE? Should I find other SWT for mac? and where?
   Or do I have something wrong in my code?

   Well any advice or hunt would be really great...

   Thanks a lot.

   Romu

   Exception in thread "Thread-1072" org.eclipse.swt.SWTException:
   Invalid thread access
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.widgets.Display.error(Unknown Source)
         at org.eclipse.swt.widgets.Display.checkDevice(Unknown Source)
         at org.eclipse.swt.widgets.Display.getCursorLocation(Unknown
   Source)
         at org.eclipse.swt.widgets.Display.mouseHoverProc(Unknown
   Source)
   Exception in thread "Thread-1859" org.eclipse.swt.SWTException:
   Invalid thread access
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.SWT.error(Unknown Source)
         at org.eclipse.swt.widgets.Display.error(Unknown Source)
         at org.eclipse.swt.widgets.Display.checkDevice(Unknown Source)
         at org.eclipse.swt.widgets.Display.getCursorLocation(Unknown
   Source)
         at org.eclipse.swt.widgets.Display.mouseHoverProc(Unknown
   Source)


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