package com.vci.client.ui.swing;

import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JTextArea;

/**
 * 继承JTextArea，在此基础上增加红色标记，目的是提醒用户文本内容不能为空。
 * @author Administrator
 *
 */
public class KTextArea extends JTextArea{
	
	private static final long serialVersionUID = 1L;
	public void paint (Graphics g) {
		super.paint (g);
	    g.setColor (Color.red);
	    int text_XSize = this.getWidth ();
	    
	    int[] xSeq = new int[3];
	    int[] ySeq = new int[3];
	    xSeq[0] = text_XSize - 6;
	    ySeq[0] = 0; 
	    xSeq[1] = text_XSize;
	    ySeq[1] = 0;
	    xSeq[2] = text_XSize;
	    ySeq[2] = 6;
	    g.fillPolygon (xSeq, ySeq, 3);
	}

}