import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class PlayBalloon extends JFrame
                         implements ActionListener {

    /** Size change buttons. */
    private JButton grow, shrink;
    
    /** Four movement buttons. */
    private JButton moveLeft, moveRight, moveUp, moveDown;
    
    /** To flip picture <-> description mode. */
    private JButton mode;
    
    /** 'Flag' indicating the current mode:
     *      true = show a picture, false = show a description.
     */
    private boolean pictureMode = true;
    
    /** Panel for drawing on. */
    private JPanel panel;

    /** To hold a single instance of the Balloon class. */
    private Balloon myBalloon;

    /** Storage for a balloon 'party'. */
//    private final int partySize = 10;             // Number of balloons in the party
//    private Balloon[] party;                      // There will be one balloon per element of this array

    /**
     *  The main program for the PlayBalloon class
     *
     * @param  args  The command line arguments
     */
    public static void main( String[] args ) {

        PlayBalloon play = new PlayBalloon();
        play.setSize( 320, 430 );
        play.createGUI();
        play.setVisible( true );

    } // End of main

    /** Set up the Graphical user interface and balloon information */
    private void createGUI() {

        setDefaultCloseOperation( EXIT_ON_CLOSE );
        Container window = getContentPane();
        window.setLayout( new FlowLayout() );

        grow = new JButton( "Grow" );
        window.add( grow );
        grow.addActionListener( this );

        shrink = new JButton( "Shrink" );
        window.add( shrink );
        shrink.addActionListener( this );

        moveLeft = new JButton( "Left" );
        window.add( moveLeft );
        moveLeft.addActionListener( this );

        moveRight = new JButton( "Right" );
        window.add( moveRight );
        moveRight.addActionListener( this );

        moveUp = new JButton( "Up" );
        window.add( moveUp );
        moveUp.addActionListener( this );

        moveDown = new JButton( "Down" );
        window.add( moveDown );
        moveDown.addActionListener( this );

        mode = new JButton( "Picture/description mode" );
        window.add( mode );
        mode.addActionListener( this );

        panel = new JPanel();
        panel.setPreferredSize( new Dimension( 300, 300 ) );
        panel.setBackground( Color.white );
        window.add( panel );

        // Create a single balloon object
        myBalloon = new Balloon( 20, 50, 50, Color.black );

        // Set up the balloon party
//        party = new Balloon[partySize];
//        for (int b = 0; b < partySize; b++) {       // Set up party of balloons
//            Color randomColour = new Color((int)(Math.random()*256),  // Red component 0-255
//                                           (int)(Math.random()*256),  // Blue component 0-255
//                                           (int)(Math.random()*256)); // Green component 0-255
//            party[b] = new Balloon(     // Create a balloon with random size, position and colour:
//                          (int) (Math.random()*30+10),  // size 10-39
//                          (int) (Math.random()*200),    // x 0-199
//                          (int) (Math.random()*200),    // y 0-199
//                          randomColour);
//        }

    } // End of createGUI

    /**
     *  React to the various GUI buttons:
     *  Update balloon or mode information as necessary and redraw the screen.
     *
     * @param  event  The event details
     */
    public void actionPerformed( ActionEvent event ) {

        if ( event.getSource() == grow )
            myBalloon.changeSize( 10 );    // Tell myBalloon to become larger

        if ( event.getSource() == shrink )
            myBalloon.changeSize( -10 );   // Tell myBalloon to become smaller

        if (event.getSource() == moveLeft)
            myBalloon.move ( -10, 0 );     // Tell myBalloon to adjust its x coordinate by -10 and y by 0
        
        if (event.getSource() == moveRight)
        myBalloon.move ( +10, 0 ); //...

        if (event.getSource() == moveUp)
        myBalloon.move ( 0, -10);

        if (event.getSource() == moveDown)
        myBalloon.move (0, +10);

        if ( event.getSource() == mode )
            pictureMode = !pictureMode;   // Flip the mode
                                          // Note: ! is logical "not" (negation)

        // Finally redraw the screen to show any changes
        paintScreen();

    } // End of actionPerformed

    /** Redraw the graphics panel */
    private void paintScreen() {

        Graphics g = panel.getGraphics();

        g.setColor( Color.white );
        g.fillRect( 0, 0, 300, 300 );

        // Tell myBalloon to draw itself on g

        myBalloon.display( g );
        myBalloon.describe( g );
        
        


        // Insert code to draw the whole balloon party here
        
    } // End of paintScreen

} // End of class PlayBalloon