focus thingie

color currentcolor;

RectButton rect1, rect2, rect3, rect4, rect5, rect6, rect7;

boolean locked = false;


Button focusElement = null;
Button focusOrder[]; 


void setup()
{
  size(1400, 100);
  smooth();

  color baseColor = color(102);
  currentcolor = baseColor;

  // Define and create circle button
  color buttoncolor = color(204);
  color highlight = color(153);
  ellipseMode(CENTER);
  
  // Define and create circle button
  buttoncolor = color(204);
  highlight = color(153); 
 
  // Define and create circle button
  buttoncolor = color(153);
  highlight = color(102); 

  // Define and create rectangle button
  buttoncolor = color(102);
  highlight = color(51); 
  rect1 = new RectButton(1300, 20, 50, buttoncolor, highlight);
  //PFont font;
  //font = loadFont("Serif-48.vlw");
  //text("word", 10, 30);
  rect2 = new RectButton(1100, 20, 50, buttoncolor, highlight);
  rect3 = new RectButton(900, 20, 50, buttoncolor, highlight);
  rect4 = new RectButton(700, 20, 50, buttoncolor, highlight);
  rect5 = new RectButton(500, 20, 50, buttoncolor, highlight);  
  rect6 = new RectButton(300, 20, 50, buttoncolor, highlight);
  rect7 = new RectButton(100, 20, 50, buttoncolor, highlight);
  
  // Define and create rectangle button
//  buttoncolor = color(51);
//  highlight = color(0); 

  // by default give the focus to the first button, 
  // also define the focus order to be the elements from left to right (opposed to their names)
  focusElement = rect1; 
  focusOrder = new Button[]{ rect7, rect6, rect5, rect4, rect3, rect2, rect1 }; 
  
}

void draw()
{
  background(currentcolor);
  stroke(255);
  update(mouseX, mouseY);
  rect1.display();
  PFont font;
  font = loadFont("Serif-48.vlw");
  text("Name", 100, 90);
  rect2.display();
  font = loadFont("Serif-48.vlw");
  text("Price", 300, 90);
  rect3.display();
  font = loadFont("Serif-48.vlw");
  text("Quality", 500, 90);
  rect4.display();
  font = loadFont("Serif-48.vlw");
  text("Calories", 700, 90);
  rect5.display();
  font = loadFont("Serif-48.vlw");
  text("Alcohol", 900, 90);
  rect6.display();
  font = loadFont("Serif-48.vlw");
  text("Bitters", 1100, 90);
  rect7.display();
  font = loadFont("Serif-48.vlw");
  text("Malty", 1300, 90);
}

void update(int x, int y)
{
  if(locked == false) {
    rect1.update();
    rect2.update();
    rect3.update();
    rect4.update();
    rect5.update();
    rect6.update();
    rect7.update();
  } 
  else {
    locked = false;
  }

 //if(mousePressed) {
 //      currentcolor = rect1.basecolor;
 //   } 
 //   else if(rect2.pressed()) {
//      currentcolor = rect2.basecolor;
//  }
}



void keyPressed(){
  if( keyCode == TAB ){
    println( "Focusing next..." ); 
    int focusIndex = -1; 
    for( int i = 0; i < focusOrder.length; i++ ){
      if( focusOrder[i] == focusElement ){
        // aha... here it is! we can break out of the loop! 
        focusIndex = i; break; 
      }
    }
    
    // is shift pressed as well? then go back! 
    if( keyEvent.getModifiers() == KeyEvent.SHIFT_MASK )
      focusElement = focusOrder[ (focusIndex-1+focusOrder.length) % focusOrder.length ]; 
    // nope, go forward
    else
      focusElement = focusOrder[ (focusIndex+1) % focusOrder.length ]; 
    println( "new focus element is: " + focusElement ); 
  }
}


class Button
{
  int x, y;
  int size;
  color basecolor, highlightcolor;
  color currentcolor;
  boolean over = false;
  boolean pressed = false;   

  void update() 
  {
    if(over()) {
      currentcolor = highlightcolor;
    } 
    else {
      currentcolor = basecolor;
    }
  }

  boolean pressed() 
  {
    if(over) {
      locked = true;
      return true;
    } 
    else {
      locked = false;
      return false;
    }    
  }

  boolean over() 
  { 
    return true; 
  }

  boolean overRect(int x, int y, int width, int height) 
  {
    if (mouseX >= x && mouseX <= x+width && 
      mouseY >= y && mouseY <= y+height) {
      return true;
    } 
    else {
      return false;
    }
  }

  boolean overCircle(int x, int y, int diameter) 
  {
    float disX = x - mouseX;
    float disY = y - mouseY;
    if(sqrt(sq(disX) + sq(disY)) < diameter/2 ) {
      return true;
    } 
    else {
      return false;
    }
  }

}

class CircleButton extends Button
{ 
  CircleButton(int ix, int iy, int isize, color icolor, color ihighlight) 
  {
    x = ix;
    y = iy;
    size = isize;
    basecolor = icolor;
    highlightcolor = ihighlight;
    currentcolor = basecolor;
  }

  boolean over() 
  {
    if( overCircle(x, y, size) ) {
      over = true;
      return true;
    } 
    else {
      over = false;
      return false;
    }
  }

  void display() 
  {
    stroke(255);
    fill(currentcolor);
    ellipse(x, y, size, size);
  }
}

class RectButton extends Button
{
  RectButton(int ix, int iy, int isize, color icolor, color ihighlight) 
  {
    x = ix;
    y = iy;
    size = isize;
    basecolor = icolor;
    highlightcolor = ihighlight;
    currentcolor = basecolor;
  }

  boolean over() 
  {
    if( overRect(x, y, size, size) ) {
      over = true;
      return true;
    } 
    else {
      over = false;
      return false;
    }
  }

  void display() 
  {
    stroke(255);
  //PFont font;
  //font = loadFont("Serif-48.vlw");
  //text("word", 100, 90);    
    //fill(currentcolor);
    rect(x, y, size, size);
    
    // do your own thing here! 
    if( focusElement == this ){
      // me? focus? hurray! 
      stroke( 255, 0, 0 ); 
      rect( x-1, y-1, size+2, size+2 ); 
    }
  }
}