Search processing.org:

Reference for Processing version 1.0+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name | ### focused
Examples |
    if (focused) {  // or "if (focused == true)"
      ellipse(25, 25, 50, 50);
    } else {
      line(0, 0, 100, 100);
      line(100, 0, 0, 100);
    }
Description | Confirms if a Processing program is "focused", meaning that it is active and will accept input from mouse or keyboard. This variable is "true" if it is focused and "false" if not. This variable is often used when you want to warn people they need to click on or roll over an applet before it will work.
Usage | Web

Updated on November 22, 2008 08:39:25pm PST