I tried running a Java swing application that I know works fine. When I runit it on my linux box, I get the following error message, followed by an exception:

/usr/share/themes/LighthouseBlue/gtk-2.0/gtkrc:53: Engine "lighthouseblue" is unsupported, ignoring

I've ommitted the exception because I don't think the exeption is relevant... I think the problem is with the gtk-2.0.

I downloaded the gtk+-2.8.18 and tried running the configure script. I kept on getting messages that I was missing dependencies so I started installing them one by one. I finally came to a point where some of the dependencies are not installing for me (they're giving me errors when trying to install them, e.g. pango, cairo, etc.)

Here's what I get (output) when I try running gtk-2.0's configure script:

checking for BASE_DEPENDENCIES... Requested 'glib-2.0 >= 2.8.5' but version of GLib is 2.6.4
configure: error: Package requirements (glib-2.0 >= 2.8.5 atk >= 1.0.1 pango >= 1.9.0 cairo >= 0.9.2) were not met:

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables BASE_DEPENDENCIES_CFLAGS
and BASE_DEPENDENCIES_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

Is there a simpler way to get gtk-2.0 installed and solve my problems or is this the only way ? By the way, is the unsupported "lighthouseblue" message above, really due to the fact that I'm missing gtk-2.0 ?
Any help on this matter would greatly be appreciated.
Thanks in advance.

I don't know if this problem is related or not, but...

It seems like any X-based tool that I run or anything that requires gtk+, I cannot run. I've been looking for a gui based wifi config tool and I cannot run any of them because of this problem that I have that I haven't been able to solve yet. Any help would be appreciated.

[root@blah roger]# system-config-network
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

ERROR: Unable to initialize graphical environment. Most likely cause of failure is that the tool was not run using a graphical environment. Please either start your graphical user interface or set your DISPLAY variable.

After having left this problem for a long while, I decided to eventually come back to it. I managed to successfully install all of gtk-2's dependencies, gtk+-2.8.18 itself, and lighthouseblue-gtk2.

Now I start up eclipse and run my java swing application but I still get the same error, namely:

Nov 30, 2006 5:35:17 AM com.donraja.ah.am.Admin setupLogging
INFO: Starting
/usr/share/themes/LighthouseBlue/gtk-2.0/gtkrc:51: Engine "lighthouseblue" is unsupported, ignoring
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
<REST_OF_STACKTRACE_FOLLOWS>

As I said before, I know this application compiles and runs fine on other plaforms and even a linux machine I tested with at work. Does anyone know what's going on ? Is there any way to tell whether gtk2 or lighthouseblue installed correctly ? There was no complaints after doing a 'make' and 'make install' for each so I'm assuming that the builds and installs happened correctly. Any help or suggestions would be greatly appreciated.

After having installed lighthouseblue-gtk2 engine, I saw the following message printed:

---------------------------------------
Libraries have been installed in:
/usr/lib/gtk-2.0/2.4.0/engines

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the `LD_RUN_PATH' environment variable
during linking
- use the `-Wl,--rpath -Wl,LIBDIR' linker flag
- have your system administrator add LIBDIR to `/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
---------------------------------------

Does this have anything to do with why I cannot run my Java application ? If you can provide me with some help and insight, I would greatly appreciate it.... I'm a newbie :-)
Thanks.