/*************************************************************
 * Class for representing a "push bar" (a "button" that runs the
 * width of the applet). It looks general, but works best near the
 * top of the Eight_Puzzle applet, and uses some of its global
 * variables (game, s) and methods (bottomTextMessage()).
 *************************************************************/
public class PushBar
{
  //"Height" of the bar:
  private int barHeight;
  //Its y position:
  private int positionY;
  //Fonts:
  //bigButtonFont is the normal font.
  //littleButtonFont is what shows when the button is pressed.
  private PFont bigButtonFont, littleButtonFont;

  /*************************************************************
   * Constructor's first parameter is the bar's height, the second
   * its position.
   *************************************************************/
  public PushBar(int barHeight, int positionY)
  {
    this.barHeight = barHeight;
    this.positionY = positionY;
    //The background behind the bar:
    fill(0);
    rect(0, positionY, width, barHeight);
    //The bar itself:
    noStroke();
    fill(200, 226, 120);
    rect(0, positionY, width - 1, barHeight);
    stroke(0);
    littleButtonFont = loadFont("Skia-Regular_Regular-13.vlw");
    bigButtonFont = loadFont("Skia-Regular_Regular-14.vlw");
    //Text label in the bar:
    textFont(bigButtonFont, 14);
    fill(0);
    text("Click here to restart", 40, positionY + barHeight - 5);
  }

  /*************************************************************
   * Invoke when the bar should be pressed (when the mouse is
   * pressed and the mouse is over the bar).
   *************************************************************/
  public void press ()
  {
    if (mouseOver())
    {
      //The background behind the bar:
      fill(0);
      rect(0, positionY, width, barHeight);
      //The bar itself (smaller when pressed):
      noStroke();
      fill(190, 200, 110);
      rect(2, positionY + 2, width - 4, barHeight - 3);
      stroke(0);
      //Text label on the bar (also smaller when pressed):
      textFont(littleButtonFont, 12);
      fill(0);
      text("Click here to restart", 45, positionY + barHeight/2 + 5);
      reset();
    }
  }

  /*************************************************************
   * Invoke when the bar should be release (when the mouse is
   * released and the mouse is over the bar).
   *************************************************************/
  public void release ()
  {
    if (mouseOver())
    {
      //The background behind the bar:
      fill(0);
      rect(0, positionY, width, barHeight);
      //The bar itself:
      noStroke();
      fill(200, 226, 120);
      rect(0, positionY, width - 1, barHeight);
      stroke(0);
      //Text label on the bar:
      textFont(bigButtonFont, 14);
      fill(0);
      text("Click here to restart", 40, positionY + barHeight/2 + 5);
    }
  }

  /*************************************************************
   * Returns true when the mouse is over the bar.
   *************************************************************/
  public boolean mouseOver ()
  {
    return (positionY <= mouseY && mouseY <= barHeight - 2);
  }

  /******************************************************
   * Put everything back the way it was at the beginning.
   ******************************************************/
  private void reset ()
  {
    game = new EightPuzzle();

    //MODIFY: Invoke the reset() method for each Square
    //in the array s.
    
    //MODIFY:
    bottomTextMessage("Put appropriate message here.", 5);
  }

}