public OutlineLineNumber(OutlinerCellRendererImpl renderer) {
		this.renderer = renderer;
		
		setVerticalAlignment(SwingConstants.TOP);
		
		if (Preferences.getPreferenceBoolean(Preferences.SHOW_LINE_NUMBERS).cur || Preferences.getPreferenceBoolean(Preferences.SHOW_INDICATORS).cur) {
			setOpaque(true);
		} else {
			setOpaque(false);
		}
				
		setVisible(false);
	}