Figure pressedFigure = drawingView.getDrawing().findFigureInside(realX, realY);
if (pressedFigure instanceof ResourceComponentFigure) {
textHolder = (TextHolder) pressedFigure;
if (!textHolder.acceptsTyping())
textHolder = null;
}
if (textHolder != null) {//��ʼ�༭��갴�´���textHolder����������
beginEdit(textHolder);