testminidialog.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 82 行

/*
 * TestMinidialog.java  E.L. 2001-08-23
 *
 * Closing the dialog behaves as if the Ok button was pressed.
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class MiniDialog extends JDialog {
  private boolean ok;
  private Container guiContainer;

  public MiniDialog(JFrame parent) {
    super(parent, "Minidialog", true);
    guiContainer = getContentPane();
    guiContainer.add(new JLabel(), BorderLayout.NORTH);
    guiContainer.add(new JLabel("Dialog Testing"), BorderLayout.CENTER);
    guiContainer.add(new ButtonPanel(), BorderLayout.SOUTH);
    pack();
  }

  private class ButtonPanel extends JPanel {
    public ButtonPanel() {
      ButtonListenerDialog buttonListener = new ButtonListenerDialog();

      JButton okButton = new JButton("OK");
      add(okButton);
      okButton.addActionListener(buttonListener);

      JButton cancelButton = new JButton("Cancel");
      add(cancelButton);
      cancelButton.addActionListener(buttonListener);
    }
  }

  private class ButtonListenerDialog implements ActionListener {
    public void actionPerformed(ActionEvent event) {
      String command = event.getActionCommand();
      if (command.equals("OK")) ok = true;
      else ok = false;
      setVisible(false);
    }
  }

  public boolean showDialog() {
    setVisible(true);
    return ok;
  }
}

class ParentWindow extends JFrame {
  private MiniDialog dialogBox = new MiniDialog(this);
  private Container guiContainer;

  public ParentWindow() {
    setTitle("Testing Dialogs");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    guiContainer = getContentPane();
    guiContainer.setLayout(new FlowLayout());
    JButton button = new JButton("Press here!");
    guiContainer.add(button);
    ButtonListenerParent buttonListener = new ButtonListenerParent();
    button.addActionListener(buttonListener);
  }

  private class ButtonListenerParent implements ActionListener {
    public void actionPerformed(ActionEvent event) {
      if (dialogBox.showDialog()) System.out.println("OK pressed....");
      else System.out.println("Cancel pressed....");
    }
  }
}

class TestMiniDialog {
  static public void main(String[] args) {
    ParentWindow parentWindow = new ParentWindow();
    parentWindow.setSize(300, 200);
    parentWindow.setVisible(true);
  }
}