Bug 34335 DND doesn't work
RC2 Linux-GTK Drag and drop doesn't work. I've tried it in the DNDExample and in the package explorer and drags are never initiated.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingPart.java
protected final void setHelp() {
		JavaUIHelp.setHelp(fViewer, getHelpContextId());
	}
	/**
	 * Returns the context ID for the Help system
	 * 
	 * @return	the string used as ID for the Help context
	 */
	abstract protected String getHelpContextId();
	/**
	 * Returns the preference key for the link to editor setting.
	 * 
	 * @return	the string used as key into the preference store
	 */
	abstract protected String getLinkToEditorKey();
	/**
	 * Adds additional listeners to this view.
	 * This method can be overridden but should
	 * call super.
	 */
	protected void hookViewerListeners() {
		fViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				if (!fProcessSelectionEvents)
					return;
				fPreviousSelectedElement= getSingleElementFromSelection(event.getSelection());
				IWorkbenchPage page= getSite().getPage();
				if (page == null)
					return;
				if (page.equals(JavaPlugin.getActivePage()) && JavaBrowsingPart.this.equals(page.getActivePart())) {