messagebox.java

黑白棋123 黑白棋456 大学毕业设计 做很好

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class MessageBox extends Dialog
{
	protected Button okButton;
	protected Button cancelButton;
	protected static boolean back;
	final static public int OKCANCEL = 1;
	final static public int OKONLY = 0;
	protected static Frame createdFrame;
		
	public MessageBox(Frame parent,String message,String title ,int type)
	{
		super(parent,true);
		this.setResizable(false);
		this.setTitle(title);
		this.setBackground(Color.lightGray);
			
		Panel msgboxPanel = new Panel();
		Panel buttonPanel = new Panel();
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints gbc = new GridBagConstraints();
		okButton = new Button(" OK ");
		cancelButton = new Button(" Cancel ");
		Label messagelabel = new Label(message,Label.CENTER);
			
		BListener bListener = new BListener();
		okButton.addActionListener(bListener);
		cancelButton.addActionListener(bListener);
		this.addWindowListener(new WListener());
		msgboxPanel.setLayout(gridbag);
				
		gbc.anchor = GridBagConstraints.CENTER ;
		gbc.fill = GridBagConstraints.NONE;
		gbc.weightx = 1;
		gbc.weighty = 1;
		gbc.ipady = 5;
		gbc.insets = new Insets(10,20,5,20);
		gbc.gridy = 0;
		gbc.gridx = GridBagConstraints.REMAINDER;
		msgboxPanel.add(messagelabel,gbc);

		gbc.insets = new Insets(0,20,20,20);
		gbc.weighty  = 0;
		gbc.weightx = 0;
		gbc.gridy = 1;
		gbc.ipadx = 10;
		gbc.ipady = 5;
		msgboxPanel.add(buttonPanel,gbc);

		switch(type)
		{
		case OKCANCEL: // OkCancel
			{
				buttonPanel.setLayout(new GridLayout(1,2,10,10));
				buttonPanel.add(okButton);
				buttonPanel.add(cancelButton);
				break;
			}
				
		case OKONLY: // Ok only
			{
				buttonPanel.setLayout(new BorderLayout());
				buttonPanel.add(okButton,"Center");
				break;
			}
		}
		add(msgboxPanel);
		pack();
		Toolkit toolkit = Toolkit.getDefaultToolkit();
		Dimension scrSize = toolkit.getScreenSize();
		setLocation((scrSize.width - getSize().width)/2,(scrSize.height- getSize().height)/2);
	}

	public static boolean createMessageBox(String msg)
	{
		return createMessageBox(null,msg,"",0);
	}
	public static boolean createMessageBox(String msg,String title)
	{
		return createMessageBox(null,msg,title,0);
	}
	public static boolean createMessageBox(String msg,String title,int type)
	{
		return createMessageBox(null,msg,title,type);
	}
	public static boolean createMessageBox(Frame parent,String msg,String title,int type)
	{
		if ( parent  == null )
		{
			if (createdFrame == null ) 
			{
				createdFrame = new Frame("Dialog");
				createdFrame.setVisible(false);
			}
			parent = createdFrame;
		}

		MessageBox msgbox = new MessageBox(parent,msg,title ,type);
		msgbox.show();
		if(back) return true;
		else return false;
	}
		
	public class BListener implements ActionListener 
	{
		public void actionPerformed(ActionEvent e)
		{
			if( e.getSource() == okButton)
			{
				back = true;
				dispose();
			}
			else
			{
				back= false;
				dispose();
			}
		}
	}
	public class WListener extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			back = false;
			dispose();
		}
	}
}