// Example by Tom Igoe

import processing.serial.*;

Serial myPort;  // The serial port
int data;
int numChars = 26;
color[] colors = new color[numChars];
int keyIndex;
float keyScale;
int rectWidth;

void setup() 
{ 
     
  println(Serial.list());
  // I know that the first port in the serial list on my mac
  // is always my  Keyspan adaptor, so I open Serial.list()[0].
  // Open whatever port is the one you're using.
  myPort = new Serial(this, Serial.list()[1], 9600);
  myPort.bufferUntil(0xFF);

  size(200, 200);
  noStroke();
  background(0);
  keyScale = 200/numChars-1.0;
  rectWidth = width/4;

  // Send a capital A out the serial port
  //myPort.write(65);

  println("polling incoming uart data every 250 ms...");
} 

/*void serialEvent(Serial myPort) {
  data = myPort.last();
}*/

void draw()
{ 
  if(keyPressed) {
    if(key >= 'A' && key <= 'z') {
      if(key <= 'Z') {
        keyIndex = key-'A';
      } else {
        keyIndex = key-'a';
      }
      
      // dump ascii code for keypress to serial device
      myPort.write(key);
      println("wrote " + key + " to serial port");
      
      fill(millis()%255);
      float beginRect = rectWidth/2 + keyIndex*keyScale-rectWidth/2;
      rect(beginRect, 0.0, rectWidth, height);
    }
  }
}