Bug 113104 [hovering] Consider adapting AbstractInformationControl to new PopupDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/HierarchyInformationControl.java
}
		Object selection= null;
		if (input instanceof IMember) {
			selection=  input;
		} else if (topLevelObjects.length > 0) {
			selection=  topLevelObjects[0];
		}
		inputChanged(fLifeCycle, selection);
	}
	
	protected void stringMatcherUpdated() {
		if (fDoFilter) {
			super.stringMatcherUpdated(); 
		} else {
			selectFirstMatch();
		}
	}
	
	protected void toggleHierarchy() {
		TreeViewer treeViewer= getTreeViewer();
		
		treeViewer.getTree().setRedraw(false);
		
		Object[] expandedElements= treeViewer.getExpandedElements();
		TypeHierarchyContentProvider contentProvider= (TypeHierarchyContentProvider) treeViewer.getContentProvider();
		treeViewer.setContentProvider(fOtherContentProvider);
		treeViewer.refresh();
		if (fOtherExpandedElements != null) {
			treeViewer.setExpandedElements(fOtherExpandedElements);
		} else {