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项目本来需要一个带有复选框的树形控件，于是我找到了JIDE里的一个开源控件，研究了一下，发现无法实现需要的功能，而我自己又比较水，在网上找到的其他代码都不会用，只好自己写一个简单的，有些“旁门左道”的感觉...下面是实现代码：

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.image.BufferedImage;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.util.Random;

import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;

public class HGCheckBoxTest extends JCheckBox implements ActionListener{
public static final int ALL_SELECTED =1;
public static final int NONE_SELECTED = 2;
public static final int SOME_SELECTED = 3;
int state = NONE_SELECTED;
public HGCheckBoxTest(int state){
super();
this.addActionListener(this);
this.state = state;
}
public HGCheckBoxTest(Action a){
super(a);
}

public void paintComponent(Graphics g){
if(state == SOME_SELECTED){

this.setSelected(true);
float[] my_kernel = {
0.10f, 0.10f, 0.10f,
0.10f, 0.20f, 0.10f,
0.10f, 0.10f, 0.10f };
ConvolveOp op = new ConvolveOp(new Kernel(3,3, my_kernel), ConvolveOp.EDGE_NO_OP, null);
BufferedImage buf = new BufferedImage(getWidth(),getHeight(), BufferedImage.TYPE_INT_RGB);
super.paintComponent(buf.getGraphics());
Image img = op.filter(buf,null);
g.drawImage(img,0,0,null);

}else{
if(state==ALL_SELECTED){
this.setSelected(true);
}else if(state == NONE_SELECTED){
this.setSelected(false);
}
super.paintComponent(g);

return;
}
}
public int getState() {
return state;
}
public void setState(int state) {
this.state = state;
}
static int i =1;
public static void main(String[] args){
JFrame frame = new JFrame("test CheckBox");
final HGCheckBoxTest testBox = new HGCheckBoxTest(3);
JButton control = new JButton("change");
control.addActionListener(new ActionListener(){

@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
int test = i++%3+1;
( testBox).setState(test);
testBox.repaint();
}

});

frame.getContentPane().add(testBox);
frame.getContentPane().add("South",control);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(new Dimension(200,200));
frame.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
int test = i++%2+1;

this.setState(test);

//System.out.println(this.isSelected());
//System.out.println(this.getState());
}
}

 程序实例截图：



 项目截图：



 舍弃JIDE方案截图：



 原因：无法通过代码设置叶子节点的选择状态。