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From: Neil Clayton <neil@cloudnine.net.nz>
To: Jakarta Commons Users List <commons-user@jakarta.apache.org>
Subject: [JELLY] - how to enable logging? (SWT specific)
Date: Mon, 21 Jul 2003 22:47:04 +0100
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Hi, I'm experimenting with Jelly / SWT and JFace, with some success. That's=
 a=20
good thing :-0

However; I *think* Im having problems with a Jexl expression, except I'm no=
t=20
sure. That's a bad thing.  =20

I'm guessing that my expression is incorrect, and is not being evaluated (I=
=20
can use a very simple version of this expression and it works, so I know th=
at=20
the execution of my script is proceeding to that point at least).

The script is as follows (this sits inside a window tag):

		<fillLayout type=3D"vertical"/>
		<sashForm type=3D"horizontal" var=3D"sash">
=09
			<label text=3D"This would be a tree" parent=3D"${sash}"/>
			<scrolledComposite var=3D"scrolled" parent=3D"${sash}" type=3D"V_SCROLL,=
 BORDER" =20
background=3D"132,251,232">
			 	<fillLayout/>
			 	<composite var=3D"grid">
				 	<fillLayout/>
			 		<label text=3D"yay" background=3D"12,12,12"/>
			 	</composite>
		 		<onEvent type=3D"Resize" var=3D"resizeEvent">
		 			${ grid.computeSize(scrolled.getBounds().width,=20
org.eclipse.swt.SWT.DEFAULT) }
		 		</onEvent>
		 		${grid.setSize(10, 10) }
			</scrolledComposite>

The idea is that when the scrolled-composite is resized, the grid is resize=
d=20
to fit inside (well, height can vary, width will always be fixed to the wid=
th=20
of the parent).... except nothing happens.

If I change the <onEvent> content to be ${grid.setSize(100,100)} it is show=
n=20
larger than the default of 10,10...  so I know the event handler is being=20
called.

Weird thing is, if I put an invalid expression in there, Jelly doesn't fail=
=20
with any exception - is this normal behavior?  Also, is there a way to enab=
le=20
more logging (I get *none*), so that I can see what's going on in more=20
detail?

Lastly, I have a default log4j.properties in the root of the cp, with

log4j.logger.org.apache.commons.jelly.tags.swt=3DDEBUG
log4j.logger.org.apache.commons=3DDEBUG

but this appears to have no effect - e.g: I dont see the text "Running=20
script!", mentioned below in main(). Perhaps log4j is not being used or=20
initialized?=20

I am starting the script using:

	public static void main(String[] args) {
		log.debug("Running script!");

		JellyContext context =3D new JellyContext();
		XMLOutput output;
		try {
			output =3D XMLOutput.createXMLOutput(System.out);
		} catch (UnsupportedEncodingException e) {
			throw new RuntimeException("died creating output", e);
		}
	=09
	=09
		try {
			context.runScript("src/JFaceThumbnailer.jelly", output);
			output.flush();
		} catch (Throwable e) {
			e.printStackTrace();
		}
	}

Neil


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