private IAction[] createActions() {

		ISharedImages sharedImages = PlatformUI.getWorkbench()
				.getSharedImages();

		projectsAction = new TopLevelContentAction(false);
		projectsAction
				.setText(WorkbenchNavigatorMessages.actions_WorkingSetRootModeActionGroup_Project_);
		projectsAction.setImageDescriptor(sharedImages
				.getImageDescriptor(IDE.SharedImages.IMG_OBJ_PROJECT));

		workingSetsAction = new TopLevelContentAction(true);
		workingSetsAction
				.setText(WorkbenchNavigatorMessages.actions_WorkingSetRootModeActionGroup_Working_Set_);
		workingSetsAction.setImageDescriptor(WorkbenchNavigatorPlugin
				.getDefault().getImageRegistry().getDescriptor(
						"full/obj16/workingsets.gif")); //$NON-NLS-1$

		return new IAction[] { projectsAction, workingSetsAction };
	}
 

/**
 * Constructor for CommonNavigatorTitleProvider.
 */
public TabbedPropertySheetTitleProvider() {
	super();
	IWorkbenchPart part = PlatformUI.getWorkbench()
			.getActiveWorkbenchWindow().getActivePage().findView(ProjectExplorer.VIEW_ID);

	INavigatorContentService contentService = (INavigatorContentService) part
			.getAdapter(INavigatorContentService.class);

	if (contentService != null) {
		labelProvider = contentService.createCommonLabelProvider();
		descriptionProvider = contentService
				.createCommonDescriptionProvider();
	} else {
		WorkbenchNavigatorPlugin.log(
				"Could not acquire INavigatorContentService from part (\"" //$NON-NLS-1$
						+ part.getTitle() + "\").", null); //$NON-NLS-1$
	}
}
 

public boolean hasChildren(Object element) {
	try {
		if (element instanceof IContainer) {
			IContainer c = (IContainer) element;
			if (!c.isAccessible())
				return false;
			return c.members().length > 0;
		}
	} catch (CoreException ex) {
		WorkbenchNavigatorPlugin.getDefault().getLog().log(
				new Status(IStatus.ERROR, WorkbenchNavigatorPlugin.PLUGIN_ID, 0, ex.getMessage(), ex));
		return false;
	}

	return super.hasChildren(element);
}
 

private IAction[] createActions() {

		ISharedImages sharedImages = PlatformUI.getWorkbench()
				.getSharedImages();

		projectsAction = new TopLevelContentAction(false);
		projectsAction
				.setText(WorkbenchNavigatorMessages.actions_WorkingSetRootModeActionGroup_Project_);
		projectsAction.setImageDescriptor(sharedImages
				.getImageDescriptor(IDE.SharedImages.IMG_OBJ_PROJECT));

		workingSetsAction = new TopLevelContentAction(true);
		workingSetsAction
				.setText(WorkbenchNavigatorMessages.actions_WorkingSetRootModeActionGroup_Working_Set_);
		workingSetsAction.setImageDescriptor(WorkbenchNavigatorPlugin
				.getDefault().getImageRegistry().getDescriptor(
						"full/obj16/workingsets.gif")); //$NON-NLS-1$

		return new IAction[] { projectsAction, workingSetsAction };
	}
 

/**
 * Constructor for CommonNavigatorTitleProvider.
 */
public TabbedPropertySheetTitleProvider() {
	super();
	IWorkbenchPart part = PlatformUI.getWorkbench()
			.getActiveWorkbenchWindow().getActivePage().findView(ProjectExplorer.VIEW_ID);

	INavigatorContentService contentService = (INavigatorContentService) part
			.getAdapter(INavigatorContentService.class);

	if (contentService != null) {
		labelProvider = contentService.createCommonLabelProvider();
		descriptionProvider = contentService
				.createCommonDescriptionProvider();
	} else {
		WorkbenchNavigatorPlugin.log(
				"Could not acquire INavigatorContentService from part (\"" //$NON-NLS-1$
						+ part.getTitle() + "\").", null); //$NON-NLS-1$
	}
}
 

public boolean hasChildren(Object element) {
	try {
		if (element instanceof IContainer) {
			IContainer c = (IContainer) element;
			if (!c.isAccessible())
				return false;
			return c.members().length > 0;
		}
	} catch (CoreException ex) {
		WorkbenchNavigatorPlugin.getDefault().getLog().log(
				new Status(IStatus.ERROR, WorkbenchNavigatorPlugin.PLUGIN_ID, 0, ex.getMessage(), ex));
		return false;
	}

	return super.hasChildren(element);
}
 

/**
 * Returns the image descriptor with the given relative path.
 */
protected ImageDescriptor getImageDescriptor(String relativePath) {
	String iconPath = "icons/full/"; //$NON-NLS-1$ 
	URL url = FileLocator.find(WorkbenchNavigatorPlugin.getDefault().getBundle(), new Path(iconPath + relativePath), Collections.EMPTY_MAP);
	if (url == null) {
		return ImageDescriptor.getMissingImageDescriptor();
	}
	return ImageDescriptor.createFromURL(url);
}
 

/**
 * Returns the image descriptor with the given relative path.
 */
protected ImageDescriptor getImageDescriptor(String relativePath) {
	String iconPath = "icons/full/"; //$NON-NLS-1$ 
	URL url = FileLocator.find(WorkbenchNavigatorPlugin.getDefault().getBundle(), new Path(iconPath + relativePath), Collections.EMPTY_MAP);
	if (url == null) {
		return ImageDescriptor.getMissingImageDescriptor();
	}
	return ImageDescriptor.createFromURL(url);
}