// File: MessageDialog.java
// Classes: MessageDialog
// Author: Kedar Patankar

package edu.neu.ccs.demeter.tools.apstudio.graphedit;

import java.awt.Button;
import java.awt.Label;
import java.awt.Frame;
import java.awt.BorderLayout;
import java.awt.Event;
import java.awt.Font;
import java.awt.Color;
import java.awt.Panel;
import java.awt.Point;
import java.awt.Dimension;
import java.awt.Dialog;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;

public class MessageDialog extends Dialog implements ActionListener 
{
	private Button _execute;
	
	public MessageDialog(Frame frame,String title,String message) 
	{ 
		super(frame,title,true);
		setLayout(new BorderLayout());
		Panel p=new Panel();
		p.setLayout(new BorderLayout());
		p.add("Center",new Label(message,Label.CENTER));

		add("Center",p);
		p.setBackground(Color.lightGray);

		Panel buttonPanel = new Panel();
		_execute = new Button("Ok");
		_execute.addActionListener(this); // jdk 1.1
		buttonPanel.add(_execute);
		buttonPanel.setBackground(Color.lightGray);
		add("South",buttonPanel);
		pack();
// jdk 1.1 type window event handling
		addWindowListener(new MDAdapter()); // using inner class for window handling.
	}
		
	public void setVisible(boolean status)
	{
		if(status)
		{
			_execute.requestFocus();
			Dimension frameSize = getParent().getSize();
			Point     frameLoc  = getParent().getLocation();
			Dimension mySize    = getSize();
			int       x,y;

			x = frameLoc.x + (frameSize.width/2) -(mySize.width/2); 
			y = frameLoc.y + (frameSize.height/2)-(mySize.height/2); 
			setBounds(x,y,getSize().width,getSize().height);
		}
		super.setVisible(status);
	}

	public void actionPerformed(ActionEvent event)
	{
		close();
	}

	private void close() { setVisible(false); dispose(); }

// inner class VDAdapter
	class MDAdapter extends WindowAdapter
	{
		public void windowClosing(WindowEvent event)
		{
			close();
		}
	}

} /* end class MessageDialog */