ITEEDU

11-2-2:输出Confirm Dialog:

看过了信息对话框,接着我们来看确认对话框到底怎样.Confirm Dialog目的在让用户对某个问题选择"Yes"或"No",可算是一种 相当简单的是非选择对话框.下面这个范例中,用户可选择不同按钮类型的确认对话框,为方便说明,在此我们将Message Type都默认 为JOptionPane.INFORMATION_MESSAGE.

ConfirmDialog.java

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.*;
import com.incors.plaf.alloy.*;
import com.incors.plaf.alloy.themes.glass.*;

public class ConfirmDialog implements ActionListener {
	JFrame f = null;
	JLabel label = null;

	public ConfirmDialog() {
		f = new JFrame("OptionPane Demo");
		Container contentPane = f.getContentPane();

		JPanel panel = new JPanel();
		panel.setLayout(new GridLayout(2, 2));

		JButton b = new JButton("Show DEFAULT_OPTION");
		b.addActionListener(this);
		panel.add(b);
		b = new JButton("Show YES_NO_OPTION");
		b.addActionListener(this);
		panel.add(b);
		b = new JButton("Show YES_NO_CANCEL_OPTION");
		b.addActionListener(this);
		panel.add(b);
		b = new JButton("Show OK_CANCEL_OPTION");
		b.addActionListener(this);
		panel.add(b);

		label = new JLabel(" ", JLabel.CENTER);
		contentPane.add(label, BorderLayout.NORTH);
		contentPane.add(panel, BorderLayout.CENTER);
		f.pack();
		f.setVisible(true);

		f.addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}

	public static void main(String[] args) {
		SwingUtil.setLookAndFeel();
		new ConfirmDialog();
	}

	public void actionPerformed(ActionEvent e) {
		// 处理用户按钮事件,默认的messageType是JoptionPane.INFORMATION_MESSAGE.
		String cmd = e.getActionCommand();
		String title = "Confirm Dialog";
		String message = "";
		int messageType = JOptionPane.INFORMATION_MESSAGE;
		int optionType = JOptionPane.YES_NO_OPTION;

		if (cmd.equals("Show DEFAULT_OPTION")) {
			optionType = JOptionPane.DEFAULT_OPTION;
			message = "Show DEFAULT_OPTION Buttons";
		} else if (cmd.equals("Show YES_NO_OPTION")) {
			optionType = JOptionPane.YES_NO_OPTION;
			message = "Show YES_NO_OPTION Buttons";
		} else if (cmd.equals("Show YES_NO_CANCEL_OPTION")) {
			optionType = JOptionPane.YES_NO_CANCEL_OPTION;
			message = "Show YES_NO_CANCEL_OPTION Buttons";
		} else if (cmd.equals("Show OK_CANCEL_OPTION")) {
			optionType = JOptionPane.OK_CANCEL_OPTION;
			message = "Show OK_CANCEL_OPTION Buttons";
		}

		int result = JOptionPane.showConfirmDialog(f, message, title,
				optionType, messageType);

		if (result == JOptionPane.YES_OPTION)
			label.setText("您选择：Yes or OK");
		if (result == JOptionPane.NO_OPTION)
			label.setText("您选择：No");
		if (result == JOptionPane.CANCEL_OPTION)
			label.setText("您选择：Cancel");
		if (result == JOptionPane.CLOSED_OPTION)
			label.setText("您没做任何选择，并关闭了对话框");
	}
}

class SwingUtil {
	public static final void setLookAndFeel() {
		try {
			Font font = new Font("JFrame", Font.PLAIN, 12);
			Enumeration keys = UIManager.getLookAndFeelDefaults().keys();

			while (keys.hasMoreElements()) {
				Object key = keys.nextElement();
				if (UIManager.get(key) instanceof Font) {
					UIManager.put(key, font);
				}
			}
			AlloyLookAndFeel.setProperty("alloy.isLookAndFeelFrameDecoration",
					"true");
			AlloyTheme theme = new GlassTheme();
			LookAndFeel alloyLnF = new AlloyLookAndFeel(theme);
			UIManager.setLookAndFeel(alloyLnF);
		} catch (UnsupportedLookAndFeelException ex) {
			ex.printStackTrace();
		}
	}
}