Processing Action Keys

I recently needed to implement function keys in a Processing sketch, which are not defined as constants for keyCode() within Processing. I was able to sort it out using Java’s KeyEvent, which I was turned onto by this post on the Processing forum. Here is an example sketch I wrote for the function keys (can be easily adapted to other actions keys e.g. Page Up or Page Down):

// http://download.oracle.com/javase/1.4.2/docs/api/java/awt/event/KeyEvent.html

import java.awt.event.KeyEvent;

void setup() {}

void draw() {}

void keyPressed() {
  if (keyEvent.isActionKey() == true) {
    switch(keyCode) {
      case KeyEvent.VK_F1:
        println("F1");
        break;
      case KeyEvent.VK_F2:
        println("F2");
        break;
      case KeyEvent.VK_F3:
        println("F3");
        break;
      default:
        println("other action key");
        break;
    }
  } else {
    println("not an action key\n");
  }
}