Bug 62968 Source folders disappear in Package Explorer if set to Hierarchical Layout
I200405190010 If I set the view to "Hierarchical Layout" in the Package Explorer my "src" folder shows as empty if there are no java files in the root package (i.e. only sub-packages at the first level). Setting to "Flat" and they appear again. Tried a new Java project to recreate, but the problem is not showing on new projects. PB
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
}
	
	void toggleLayout() {
		
		fIsCurrentLayoutFlat= !fIsCurrentLayoutFlat;
		saveLayoutState(null);
		
		fContentProvider.setIsFlatLayout(isFlatLayout());
		fLabelProvider.setIsFlatLayout(isFlatLayout());
		
		fViewer.getControl().setRedraw(false);
		fViewer.refresh();
		fViewer.getControl().setRedraw(true);
	}
	
	/**
	 * This method should only be called inside this class
	 * and from test cases.
	 */
	public PackageExplorerContentProvider createContentProvider() {
		IPreferenceStore store= PreferenceConstants.getPreferenceStore();
		boolean showCUChildren= store.getBoolean(PreferenceConstants.SHOW_CU_CHILDREN);
		return new PackageExplorerContentProvider(this, showCUChildren);
	}
	
	private PackageExplorerLabelProvider createLabelProvider() {
		return new PackageExplorerLabelProvider(AppearanceAwareLabelProvider.DEFAULT_TEXTFLAGS | JavaElementLabels.P_COMPRESSED,
				AppearanceAwareLabelProvider.DEFAULT_IMAGEFLAGS | JavaElementImageProvider.SMALL_ICONS,
				fContentProvider);			
	}