package com.han;

import java.awt.Dimension;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;

import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingConstants;
import javax.swing.filechooser.FileNameExtensionFilter;

public class JFileChooser_2 extends JFrame {

  /**
   * 
   */
  private static final long serialVersionUID = -5653812191066673849L;

  static Dimension dimension;
  static JFileChooser_2 frame;

  public JFileChooser_2() {
    // TODO Auto-generated constructor stub
    final JLabel label = new JLabel("<双击选择图片>", SwingConstants.CENTER);
    getContentPane().add(label);
    dimension = getContentPane().getPreferredSize();
    // System.out.println(dimension.width + "\t" + dimension.height);
    label.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent e) {
        if (e.getClickCount() == 2) {
          JFileChooser fileChooser = new JFileChooser();
          FileNameExtensionFilter filter = new FileNameExtensionFilter(
              "图像文件（JPG）", "JPG", "JPEG");
          FileNameExtensionFilter filter2 = new FileNameExtensionFilter(
              "图像文件（JPG/PNG）", "JPG", "JPEG", "PNG");
          FileNameExtensionFilter filter3 = new FileNameExtensionFilter(
              "图像文件（JPG/PNG/GIF）", "JPG", "JPEG", "PNG", "GIF");
          fileChooser.addChoosableFileFilter(filter);
          fileChooser.addChoosableFileFilter(filter2);
          fileChooser.addChoosableFileFilter(filter3);
          // Sets the current file filter. 
          fileChooser.setFileFilter(filter2); 
          //fileChooser.setAcceptAllFileFilterUsed(false);
          int i = fileChooser.showOpenDialog(getContentPane());
          if (i == JFileChooser.APPROVE_OPTION) {
            File file = fileChooser.getSelectedFile();
            label.setIcon(new ImageIcon(file.getAbsolutePath()));
            dimension = getContentPane().getPreferredSize();
            // we have to consider the title bar's height and the two border sides
            dimension = new Dimension(dimension.width + 50, dimension.height + 50);
            frame.setSize(dimension);
          }
        }
      }
    });
  }

  /**
   * @param args
   */
  public static void main(String[] args) {
    // TODO Auto-generated method stub
    frame = new JFileChooser_2();
    frame.setTitle("选择照片对话框");
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    // we have to consider the title bar's height
    dimension = new Dimension(dimension.width + 50, dimension.height + 50);
    frame.setSize(dimension);
  }

}