/**
 * A gui-based implementation of IO.
 * Creates a window for displaying and getting information.
 * 
 * @author Ian Barland
 * @version 2007.Nov.25
 */
public class SimpleGuiIO {

  private java.awt.Frame f;

  /** A 0-arg constructor.
   */
  SimpleGuiIO() { this( "a simple gui" ); } // Just call the 1-arg constructor.

  /** Constructor, taking the window title.
   * @param title The title of the window.
   */
  SimpleGuiIO( String title ) {
    f = new javax.swing.JFrame( title );
    f.setVisible(true);
    // We need this, so that the user has a way to quit the program!
    // (by closing this otherwise-empty frame).
    }


  /** Display a message to the game-player.
   * @param msg The string to display.
   */
  public void display( String msg ) {
    javax.swing.JOptionPane.showMessageDialog( null, msg );
    }



  /** Print a message to the user, and have them enter a response (one word).
   * @param msg A message to prompt the user with.
   * @return The user's response.
   */
  public String promptForString( String msg ) {
    String answer = javax.swing.JOptionPane.showInputDialog( msg );
    return (answer == null ? "" : answer);  // Turn no-answer into "".
    }

  /** Print a message to the user, and have them enter a response (one word).
   * @param msg A message to prompt the user with.
   * @return The user's response.
   */
  public int promptForInt( String msg ) {
    String answer = javax.swing.JOptionPane.showInputDialog( msg );
    if (answer == null) { answer = ""; }  // Turn no-answer into "".
    return new Integer(answer).intValue();
    }

  public static void testIO() {
    SimpleGuiIO io = new SimpleGuiIO();
    int selection;

    io.display( "This is a message." );
    io.display( "This is another message." );

    String msg = io.promptForString( "What is your wish?" );
    io.display( "You want me to " +  msg + "?  Forget it!" );

    int num = io.promptForInt( "What is your favorite number?" );
    io.display( num + " is my favorite number, too!\n" );
    }

  }