package week1;

/*
Shows a pair of dice that are rolled when the user clicks on the
applet.  The dice are also rolled whenever the user presses a key
on the keyboard, assuming that the applet has the input focus.
It is assumed that the applet is 100-by-100 pixels.  A clicking
sound is played when the dice are rolled.
*/

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

public class ClickableDice2 extends Applet 
            implements MouseListener, FocusListener, KeyListener {

int die1 = 4;  // The values shown on the dice.
int die2 = 3;

boolean focussed;  // True when this applet has the input focus.
                   // (The color of the applet's border changes
                   // when this is true.)


public void init() {
       // To initialize the applet, register the applet to listen
       // for mouse events on itself.  Also set a light blue
       // background color.
   addMouseListener(this);
   addKeyListener(this);
   addFocusListener(this);
   setBackground( new Color(200,200,255) );
}


public void paint(Graphics g) {
       // The paint method draws a blue border and then
       // draws the two dice.
   if (focussed)
      g.setColor( Color.red );
   else
      g.setColor( Color.blue );
   g.drawRect(0,0,99,99);
   g.drawRect(1,1,97,97);
   drawDie(g, die1, 10, 10);
   drawDie(g, die2, 55, 55);
}


void drawDie(Graphics g, int val, int x, int y) {
      // Draw a die with upper left corner at (x,y).  The die is
      // 3 5 by 35 pixels in size.  The val parameter gives the
      // value showing on the die (that is, the number of dots).
   g.setColor(Color.white);
   g.fillRect(x, y, 35, 35);
   g.setColor(Color.black);
   g.drawRect(x, y, 34, 34);
   if (val > 1)  // upper left dot
      g.fillOval(x+3, y+3, 9, 9);
   if (val > 3)  // upper right dot
      g.fillOval(x+23, y+3, 9, 9);
   if (val == 6) // middle left dot
      g.fillOval(x+3, y+13, 9, 9);
   if (val % 2 == 1) // middle dot (for odd-numbered val's)
      g.fillOval(x+13, y+13, 9, 9);
   if (val == 6) // middle right dot
      g.fillOval(x+23, y+13, 9, 9);
   if (val > 3)  // bottom left dot
      g.fillOval(x+3, y+23, 9, 9);
   if (val > 1)  // bottom right dot
      g.fillOval(x+23, y+23, 9,9);
}


void roll() {
      // Roll the dice by randomizing their values.  Tell the
      // system to repaint the applet, to show the new values.
      // Also, play a clicking sound to give the user more feedback.
   die1 = (int)(Math.random()*6) + 1;
   die2 = (int)(Math.random()*6) + 1;
   play(getCodeBase(), "click.au");
   repaint();
}


public void focusGained(FocusEvent evt) {
      // When the applet gets the input focus, record that
      // fact and repaint the applet with red border.
   focussed = true;
   repaint();
}


public void focusLost(FocusEvent evt) {
      // When the applet loses the input focus, record that
      // fact and repaint the applet with blue border.
   focussed = false;
   repaint();
}


public void keyPressed(KeyEvent evt) {
     // When the user presses any key on the keyboard,
     // roll the dice;
   roll();
}


public void mousePressed(MouseEvent evt) {
      // When the user clicks the applet, roll the dice.
      // Also, request the input focus.
   roll();
   requestFocus();
}


public void mouseReleased(MouseEvent evt) { }
public void mouseClicked(MouseEvent evt) { }    // Empty methods,
public void mouseEntered(MouseEvent evt) { }    //   required by
public void mouseExited(MouseEvent evt) { }     //   the interfaces.
public void keyReleased(KeyEvent evt) { }
public void keyTyped(KeyEvent evt) { }


} // end class ClickableDice