// Dartmouth CS 2, Winter 2009, Chris Bailey-Kellogg
// Notes 6 | Sketch 6

float r=255,g=255,b=255;  // drawing color
int dc=5;                 // amount of color increment/decrement
float sz=20;              // ellipse size
boolean fade=true;        // transparent rectangle each time?

void setup()
{
  size(400,400);
  smooth();
  noStroke();
  frameRate(30);
  background(0);
  println("1:white; 0:black; c:random color");
  println("r/R, g/G, b/B: less/more red, green, blue");
  println("z/Z: smaller/bigger");
  println("f/F: no fade / fade");
}

void draw()
{
  if (fade) {
    fill(0,5);
    rect(0,0,width,height);
  }
  if (mousePressed) {
    fill(r,g,b);
    ellipse(mouseX,mouseY,sz,sz);
  }
}

void keyPressed()
{
  if (key=='1') {      // white
    r = 255; g = 255; b = 255;
    println("white");
  } 
  else if (key=='0') { // black
    r = 0; g = 0; b = 0;
    println("black");
  }
  else if (key=='c') { // random color
    r = random(255);
    g = random(255);
    b = random(255);
    println("color:"+r+","+g+","+b);
  }
  else if (key=='r') { // less red
    if (r > dc) r-=dc;
    println("red:"+r);
  }
  else if (key=='R') { // more red
    if (r < 255-dc) r+=dc;
    println("red:"+r);
  }
  else if (key=='g') {
    if (g > dc) g-=dc;
    println("green:"+g);
  }
  else if (key=='G') {
    if (g < 255-dc) g+=dc;
    println("green:"+g);
  }
  else if (key=='b') {
    if (b > dc) b-=dc;
    println("blue:"+b);
  }
  else if (key=='B') {
    if (b < 255-dc) b+=dc;
    println("blue:"+b);
  }
  else if (key=='z') { // smaller
    if (sz > 1) sz--;
    println("size:"+sz);
  }
  else if (key=='Z') { // bigger
    if (sz < 100) sz++;
    println("size:"+sz);
  }
  else if (key=='f') { // no fade
    fade = false;
    println("no fade");
  }
  else if (key=='F') { // fade
    fade = true;
    println("fade");
  }
}