ToolTipManager.sharedInstance().registerComponent(gutter);
	public void addNotify()	{		super.addNotify();		if(hasFocus())		{			setCaretVisible(true);			focusedComponent = this;		}		ToolTipManager.sharedInstance().registerComponent(painter);		if(!documentHandlerInstalled)		{			documentHandlerInstalled = true;			document.addDocumentListener(documentHandler);		}		if(isValid())			recalculateVisibleLines();	}