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[platform-swt-dev] SWT, AWT compatibility on OS X 1.3 with JDK 1.4.x
- From: Shasta Willson <shasta@xxxxxxxxxxxxxx>
- Date: Wed, 17 Aug 2005 16:11:45 -0700
- Delivered-to: firstname.lastname@example.org
I have an SWT application that needs to run on OSX 1.3 using Java
1.4.x. It loads material using AWT Color (no events needed.) Running
headless would solve the UI thread deadlock bug just fine, and on OSX
1.4 this solution suffices, however I cannot find any documentation
about whether/which version of Java 1.4 has been fixed to run on 1.3
with AWT headless. Note that I think AWT was *supposed* to run
headless on all versions of 1.4, based on Apple's release notes, but
actually performed a check for thread even when headless that causes a
conflict. (See threads below for details.)
https://bugs.eclipse.org/bugs/show_bug.cgi?id=54791 [AWT still on
Carbon in JVM 1.3]
Can anyone tell me which/if an update for Java 1.4 on OSX 1.3 fixed the
"not really headless" problem, or if there is another workaround? I
did find a bug on the Apple site that seemed like it might be a
work-around. Does anyone know if this would actually work:
A server application that uses AWT for image processing will get a
dock icon even though no user interface was presented to the user. The
application will also be quit when the user logs out.
The notion of a headless AWT isn't officially supported until Java
1.4. But there is a workaround. If you launch the java process from
the command line, add -Dcom.apple.backgroundOnly=true. If you have
packaged the application as double-clickable, you can set the standard
Info.plist key LSBackgroundOnly to a string value of 1. These do not
prevent the application from being quit when the user logs out, but
they will suppress a dock entry and menu bar.
I'm not sure if this will cause the thread-verification to be avoided.
Anyone know? Any other suggestions?