package util;

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


public class SimpleInputDialog extends Dialog
{
    public SimpleInputDialog (String prompt)
    {
	this(prompt, new TextField(100));
    }

    public String getInput ()
    {
	return myString;
    }

    public int getValue ()
    {
        try
	{
	   return Integer.parseInt(myString);
	}
	catch (NumberFormatException e)
	{
	   return 0;
	}
    }


    protected SimpleInputDialog (String prompt, TextField inputField)
    {
	super(new Frame(), prompt, true);   // make the dialog modal

	myString = null;
	myInputField = inputField;

	Panel buttonPanel = new Panel();
	Button ok = new Button("OK");
	Button cancel = new Button("Cancel");
	buttonPanel.add(ok);
	buttonPanel.add(cancel);

	myInputField.addActionListener(new ProcessOk());
	ok.addActionListener(new ProcessOk());
	cancel.addActionListener(
	    new ActionListener()
	    {
		public void actionPerformed (ActionEvent e)
		{
		    myString = null;
		    SimpleInputDialog.this.setVisible(false);
		}
	    });

        setLayout(new BorderLayout());
	add("North", myInputField);
	add("South", buttonPanel);
    }


    private String myString;
    private TextField myInputField;


    class ProcessOk implements ActionListener
    {
	public void actionPerformed (ActionEvent e)
	{
	    myString = myInputField.getText();
	    SimpleInputDialog.this.setVisible(false);
	}
    }
}