[news.eclipse.platform.swt] Re: JFace Tracing On?

["Jeff Gunther" <jeff.gunther@xxxxxxxxxxxxx>]

Try moving "boot.jar" found within the "org.eclipse.core.boot_2.0.2" plugin
into your project's classpath.

Jeff
<ned@xxxxxxxxxxx> wrote in message
news:r87zlgj2.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> I assume it's OK to post JFace questions here?  If not please direct
> me to the correct group.
>
> I am playing with JFace and I get an error which suggests that some
> kind of runtime tracing is on.  But there are not associated classes
> for tracing in JFace (or are there?).
>
> I'm using "ApplicationWindow" and the JFace "Actions" in my code. (In
> fact I am playing with code I got from here:
>
> http://www.eclipsetotale.com/articles/swt/premierProjetJFace/index.html
>
> My code creates a window, adds a menu, and creates a couple of menu
> items with actions associated.  Everything works fine until I select
> one of the actions.
>
> The I get:
>
> java.lang.NoClassDefFoundError:
org/eclipse/core/internal/boot/DelegatingURLClassLoader
> at org.eclipse.core.runtime.Platform.getDebugOption(Platform.java:272)
> at
org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(Action
ContributionItem.java:452)
> at
org.eclipse.jface.action.ActionContributionItem.handleWidgetEvent(ActionCont
ributionItem.java:403)
> at
org.eclipse.jface.action.ActionContributionItem.access$0(ActionContributionI
tem.java:397)
> at
org.eclipse.jface.action.ActionContributionItem$ActionListener.handleEvent(A
ctionContributionItem.java:72)
> at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:81)
> at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:840)
> at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:1842)
> at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1549)
> at org.eclipse.jface.window.Window.runEventLoop(Window.java:583)
> at org.eclipse.jface.window.Window.open(Window.java:563)
> at TestJFace.main(TestJFace.java:28)
>
>
> The code at
>
o.e.j.action.ActionContributionItem.handleWidgetSelection(ActionContribution
Item.java
> (line 452) suggests that it is looking for some tracing libraries in
> JFAce, and not finding them.
>
> if (action.isEnabled()) {
> boolean trace =
"true".equalsIgnoreCase(Platform.getDebugOption("org.eclipse.jface/trace/act
ions")); //$NON-NLS-1$ //$NON-NLS-2$
> long ms = System.currentTimeMillis();
> if(trace)
>     System.out.println("Running action: " + action.getText());
//$NON-NLS-1$
>     action.runWithEvent(e);
> if(trace)
>    System.out.println((System.currentTimeMillis() - ms) + " ms
>    to run action: "  + action.getText()); //$NON-NLS-1$
> }
>
> Does anyone know what the problem is?  There is no such class
> "org.eclipse.jface.trace.actions" that I can see.
>
> I'm not using a runtime workbench, or explicitly enabling tracing.
>
> Thanks.
>
> --
> Ned Ludd