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

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

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

import java.util.Vector;

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

/* Purpose : Rename strategy graph name */

public class SGRenameDialog extends Dialog implements ActionListener
{
	private TextField _graphName;
	private Button _execute, _cancel;
	private Vector _names;
	private String _oldName,_newName;
	private Label _statusInfo;

	public void setDefaultMessage()
	{
		showMessage("                                                               ");
	}

	public void showMessage(String message)
	{
		_statusInfo.setText(message);
		invalidate();
		validate();
	}

//	public SGRenameDialog(Frame frame, String title,DefaultMutableTreeNode node,Vector names)
	public SGRenameDialog(Frame frame, String title,String oldName,Vector names)
	{
		super(frame,title,true);
		_names = names;
		_oldName = oldName;

		Label label1 = new Label("Strategy Graph Name ");
		_graphName = new TextField(_oldName,25);
		
		_execute = new Button("OK");
		_cancel = new Button("Cancel");

// Addition for jdk 1.1.3
		_graphName.addActionListener(this);
		_execute.addActionListener(this);
		_cancel.addActionListener(this);
// Addition over

		Panel label = new Panel();
		label.setLayout(new BorderLayout());
		label.add("West",label1);
		label.add("East",_graphName);
		label.setBackground(Color.lightGray);
		
		Panel buttonPanel = new Panel();
		buttonPanel.add(_execute);
		buttonPanel.add(_cancel);
		buttonPanel.setBackground(Color.lightGray);
		label.add("South",buttonPanel);

		setLayout(new BorderLayout());
		add("Center",label);

		Panel _statusPanel = new Panel();
		_statusPanel.setLayout(new BorderLayout());
		_statusInfo = new Label();
		setDefaultMessage();
		_statusPanel.add("West",_statusInfo);
		_statusPanel.setBackground(Color.lightGray);

		add("South",_statusPanel);
		pack();

// jdk 1.1 type window event handling
		addWindowListener(new SGRDAdapter()); // using inner class for window handling.
	}
	
	public void setVisible(boolean status)
	{
		if(status)
		{
			_graphName.select(0,_oldName.length());
			_graphName.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)
	{
		Object source = event.getSource();
		if(source == _cancel)
			close();
		else
		if (_graphName.getText().trim().length() != 0)
			executeCommand();
	}

	public String getNewName()
	{
		if(_newName!=null)
			return _newName;
		return _oldName;
	}

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

	private void executeCommand()
	{
		String name =_graphName.getText().trim();
		if(_oldName.equals(name))
			close();
		if(name.length()==0)
		{
			_graphName.setText(_oldName);
			_graphName.requestFocus();
			_graphName.select(0,_oldName.length());
			showMessage("Can't leave it empty");
			return;
		}

		StrategyName tn;
		try{tn = StrategyName.parse(name);}catch(RuntimeException pe)
		{
			showMessage("Not a valid strategy graph name.");
			_graphName.requestFocus();
			_graphName.select(0,name.length());
			return;
		}

		if(!name.equals(tn.get_name().toString()))
		{
			showMessage("Parser thinks differently than you.");
			_graphName.requestFocus();
			_graphName.select(0,name.length());
			return;
		}

		if(_names.indexOf(name)!=-1)
		{
			showMessage("Name is already present");
			_graphName.requestFocus();
			_graphName.select(0,name.length());
			return;
		}
		_newName = name;
		close();
	}

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

} /* end class SGRenameDialog */