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My SWT application doesn't work on Mac [message #540234]

Tue, 15 June 2010 13:01

Alexandra Niculai

Messages: 84
Registered: July 2009

Member

Hi

I have an SWT application that I created on Windows and it runs fine. It runs also on Ubuntu, but when I try to run it on Mac, it doesn't work. Sometimes, I get to see the the application but it doesn't react at all.
I tried to run it in Eclipse and I always get the following exception:

java.lang.NullPointerException
	at org.eclipse.swt.widgets.Display.updateQuitMenu(Display.java:4082)
	at org.eclipse.swt.widgets.Shell.setWindowVisible(Shell.java:1632)
	at org.eclipse.swt.widgets.Shell.setVisible(Shell.java:1563)

When looking at the source code in Display line 4082, the code there is:

NSMenu mainmenu = application.mainMenu();
NSMenuItem appitem = mainmenu.itemAtIndex(0);

So mainMenu is null.

I tried to add a menubar to the application but the problem persists.
I'm using org.eclipse.swt.cocoa.macosx_3.5.2.v3557f.jar.
Could anyone please help me?

[Updated on: Tue, 15 June 2010 13:03]

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Re: My SWT application doesn't work [message #541521 is a reply to message #540234]

Mon, 21 June 2010 13:01

Daniel KrÃ¼gler

Messages: 853
Registered: July 2009

Senior Member

On 15.06.2010 15:01, Alexandra Niculai wrote:
> Hi
>
> I have an SWT application that I created on Windows and it runs fine. It
> runs also on Ubuntu, but when I try to run it on Mac, it doesn't work.
> Sometimes, I get to see the the application but it doesn't react at all.
> I tried to run it in Eclipse and I always get the following exception:
>
> java.lang.NullPointerException
> at org.eclipse.swt.widgets.Display.updateQuitMenu(Display.java: 4082)
> at org.eclipse.swt.widgets.Shell.setWindowVisible(Shell.java:16 32)
> at org.eclipse.swt.widgets.Shell.setVisible(Shell.java:1563)
>
>
> When looking at the source code in Display line 4082, the code there is:
>
>
> NSMenu mainmenu = application.mainMenu();
> NSMenuItem appitem = mainmenu.itemAtIndex(0);
>
>
> So mainMenu is null.
>
> I tried to add a menubar to the application but the problem persists.
> I'm using org.eclipse.swt.cocoa.macosx_3.5.2.v3557f.jar.
> Could anyone please help me?

Sorry, I have no MacOS, but I have heard from a colleague a similar
problem. I suggest that you search in the bugzilla entries for
such a problem and to vote for it, if existing. If not existing,
please open a new one.

Greetings from Bremen,

Daniel Krügler

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Re: My SWT application doesn't work [message #543202 is a reply to message #540234]

Mon, 28 June 2010 16:21

Peter Kanzler

Messages: 9
Registered: July 2009

Junior Member

Hello,

Mac OS X handles the menubar slightly different than other OS. What do
you do in your application (concerning menubars)? A little more
information would be great.

Try the newest SWT library as well (swt.jar):
64-bit:
http://download.eclipse.org/eclipse/downloads/drops/R-3.6-20 1006080911/download.php?dropFile=swt-3.6-cocoa-macosx-x86_64 .zip

32-bit:
http://download.eclipse.org/eclipse/downloads/drops/R-3.6-20 1006080911/download.php?dropFile=swt-3.6-cocoa-macosx.zip

And if you really want to integrate your SWT application into the Mac
environment, also read and try the following links. It works really
great for my SWT application:
http://www.transparentech.com/opensource/cocoauienhancer
http://www.rkuntz.org/pmwiki.php?n=Code.AntJarBundler

cheers
Peter

On 15.06.10 15:01, Alexandra Niculai wrote:
> Hi
>
> I have an SWT application that I created on Windows and it runs fine. It
> runs also on Ubuntu, but when I try to run it on Mac, it doesn't work.
> Sometimes, I get to see the the application but it doesn't react at all.
> I tried to run it in Eclipse and I always get the following exception:
>
> java.lang.NullPointerException
> at org.eclipse.swt.widgets.Display.updateQuitMenu(Display.java: 4082)
> at org.eclipse.swt.widgets.Shell.setWindowVisible(Shell.java:16 32)
> at org.eclipse.swt.widgets.Shell.setVisible(Shell.java:1563)
>
>
> When looking at the source code in Display line 4082, the code there is:
>
>
> NSMenu mainmenu = application.mainMenu();
> NSMenuItem appitem = mainmenu.itemAtIndex(0);
>
>
> So mainMenu is null.
>
> I tried to add a menubar to the application but the problem persists.
> I'm using org.eclipse.swt.cocoa.macosx_3.5.2.v3557f.jar.
> Could anyone please help me?

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Re: My SWT application doesn't work [message #545024 is a reply to message #543202]

Tue, 06 July 2010 12:49

Alexandra Niculai

Messages: 84
Registered: July 2009

Member

Thank you for your answers.
It's a bit complicated, there is no real menu bar, just a coolbar. Maybe that's the problem.
It still doesn't work, I'll come back and post when I find a solution.

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Re: My SWT application doesn't work on Mac [message #545812 is a reply to message #540234]

Fri, 09 July 2010 08:56

Alexey Romanov

Messages: 263
Registered: May 2010

Senior Member

I've just run into the same problem. Try starting JVM with the option -XstartOnFirstThread.

EDIT: Sorry, didn't look at your exception Embarrassed

That's not the symptoms I get when this option is missing, the application just hangs on startup. Still might be worth a try if you don't have this option.

[Updated on: Fri, 09 July 2010 09:00]

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