Bug 113104 [hovering] Consider adapting AbstractInformationControl to new PopupDialog
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/AbstractInformationControl.java
}
	private void installFilter() {
		fFilterText.setText(""); 
		fFilterText.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				String text= ((Text) e.widget).getText();
				int length= text.length();
				if (length > 0 && text.charAt(length -1 ) != '*') {
					text= text + '*';
				}
				setMatcherString(text);
			}
		});
	}
	/**
	 * The string matcher has been modified. The default implementation
	 * refreshes the view and selects the first matched element
	 */
	protected void stringMatcherUpdated() {
		
		fTreeViewer.getControl().setRedraw(false);
		fTreeViewer.refresh();
		fTreeViewer.expandAll();
		selectFirstMatch();
		fTreeViewer.getControl().setRedraw(true);
	}
	/**
	 * Sets the patterns to filter out for the receiver.
	 * <p>
	 * The following characters have special meaning: