ITEEDU

11-2-5:输出Internal Dialog:

我们之前曾经说过,JOptionPane也可以显示出Internal Dialog对话框,使用方法跟上面的范例一模一样,只是在方法名称上多了Internal这个字眼,例如showInternalMessageDialog()等等,我们来看下面的范例:

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 InternalDialog implements ActionListener {
	JInternalFrame internalFrame = null;
	JLabel label = null;

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

		JDesktopPane desktopPane = new JDesktopPane();
		internalFrame = new JInternalFrame("Internal Frame", true, true, true,
				true);
		internalFrame.setLocation(20, 20);
		internalFrame.setSize(200, 200);
		internalFrame.setVisible(true);

		Container icontentPane = internalFrame.getContentPane();
		JButton b = new JButton("Show Internal Dialog");
		b.addActionListener(this);
		icontentPane.add(b, BorderLayout.CENTER);
		label = new JLabel(" ", JLabel.CENTER);
		icontentPane.add(label, BorderLayout.NORTH);

		desktopPane.add(internalFrame);

		contentPane.add(desktopPane, BorderLayout.CENTER);
		f.setSize(350, 350);
		f.setVisible(true);

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

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

	public void actionPerformed(ActionEvent e) {
		String title = "Option Dialog";
		String message = "您喜欢吃汉堡吗？";
		int messageType = JOptionPane.QUESTION_MESSAGE;
		int optionType = JOptionPane.YES_NO_CANCEL_OPTION;
		String[] options = { "喜欢", "不喜欢", "取消" };

		int result = JOptionPane.showInternalOptionDialog(internalFrame,
				message, title, optionType, messageType, null, options,
				options[1]);

		if (result == JOptionPane.YES_OPTION)
			label.setText("您选择：喜欢");
		if (result == JOptionPane.NO_OPTION)
			label.setText("您选择：不喜欢");
		if (result == JOptionPane.CANCEL_OPTION)
			label.setText("您选择：取消");
		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();
		}
	}
}

读者在使用Internal Dialog时要特别注意,一般我们利用JOptionPane所产生的对话框均是modal为true状态,可是当你使用 Internal Dialog时对话框会变成modal为false状态.因此你可以不用关闭之前的对话框,就可以再按一次按钮,再产生一个Internal Dialog.你再运行上一例操作后就知道了. 若你想将JInternalFrame内的Internal Dialog model设为true,你可以有下面两种解决方法:

1.你可以建立JOptionPane对象,而非直接去调用JOptionPane的static方法来输出对话框.然后利用JOptionPane的createDialog()方法,取得JDialog对象,再利用Dialog(JDialog继承Dialog)所提供的setModal()方法将modal设为true.

2.直接使用JDialog.