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• CalendarSource.php
• Garage.php
• GarageSource.php
• HomeScreen.php
• Img.php
• NetPort.php
• Port.php
• Screen.php
• ScreenManager.php
• Shmu.php
• TestScreen.php
• Weather.php
• WeatherSource.php
• terminal.php

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<?php
/** registers set of screens
    switches between them
    handles touch actions - sends coordinates to Screen instances
    sends screen image to device
*/
class ScreenManager{
  // Port instance to send data to
  protected $port;
  // timeout of I/O
  protected $timeout;
  // list of registered screens
  protected $screens = Array();
  // instance of active screen
  protected $active;

  function __construct(Port $port){
    $this->port = $port;
  }

  function register(Screen $screen){
    $id = $screen->id();
    $this->screens[$id] = $screen;
  }

  /* activates screen */
  function activate($idOrScreen, $params=false){
    if($idOrScreen instanceof Screen){
      $this->active = $idOrScreen;
    }else{
      $this->active = $this->screens[$idOrScreen];
    }
    if(!$this->active) throw new Exception("No screen! $idOrScreen");
    $this->active->activate($params);
  }

  /* main work function */
  function work(){
    if(!$this->active){
      throw new Exception("no screen selected");
    }
    // let active screen do it work
    $r = $this->active->work();
    // handle actions
    switch($r["action"]){
      case "image":
        $img = $r["image"];
        $this->sendImage($img);
        imagepng($img, "out.png");
        if($r["destroy"]) imagedestroy($img);
      break;
      case "screen":
        $this->activate($r["id"], $r["params"]);
        $this->work();
        return;
      break;
      case "nothing":

      break;
      default:
      break;
    }
    // set port timeout to screen timeout
    $this->port->setTimeout($this->active->timeout());
    while(true){
      $r = $this->port->read(1);
      if($r !== false && strlen($r) > 0){
         switch ($r) {
            // incoming touch
            case 'T':
              $x = ord($this->port->read(1));
              $y = ord($this->port->read(1));
              // rotate to landscape !
              $this->active->touch(160 - $y,$x);
            break;
            // incoming refresh request
            case 'R':
              clearBuf();
            break;
         }
         // shorten timeout and repeat
         // to get rid of all waiting events from device
         $this->port->setTimeout(100);
      }else{
        break;
      }
    }
  }

  /** sends GD image $img to device */
  function sendImage($img){
    sendImg($img, $this->port);
  }
}