processing serial port select template

import controlP5.*;
import processing.serial.*;

//rough template for serial port selection
//based on controlP5 examples by andreas schlegel
//changes by devicer.net

Serial port;

ControlP5 cp5;
DropdownList d1;

String[] seriallist;
int serialSpeed = 9600;

void setup() {
  size(600, 600);
  println(Serial.list());
  cp5 = new ControlP5(this);

  String[] seriallist = Serial.list();
  println(seriallist.length);
  if (seriallist.length == 0) {
    println("Empty serial list, no ports available/active");
  }
  if (seriallist.length == 1) {
    println("only one port found, using that one!");
  }
  else {
    if (seriallist.length > 1) {
      //do stuf fto create drop down choice...
      d1 = cp5.addDropdownList("serial ports select d1")
        .setPosition(100, 100)
          ;
      customize(d1); // customize the first list
      d1.captionLabel().set("select serial port");
      for (int i=0;i<seriallist.length;i++) {
        d1.addItem(seriallist[i], i);
      }
    }
  }
}


void draw() {
  background(0);
  // do stuff!
}


void customize(DropdownList ddl) {
  // a convenience function to customize a DropdownList
  ddl.setBackgroundColor(color(190));
  ddl.setItemHeight(20);
  ddl.setBarHeight(15);
  ddl.captionLabel().style().marginTop = 3;
  ddl.captionLabel().style().marginLeft = 3;
  ddl.valueLabel().style().marginTop = 3;
  //ddl.scroll(0);
  ddl.setColorBackground(color(60));
  ddl.setColorActive(color(255, 128));
}

void controlEvent(ControlEvent theEvent) {
  // DropdownList is of type ControlGroup.
  // A controlEvent will be triggered from inside the ControlGroup class.
  // therefore you need to check the originator of the Event with
  // if (theEvent.isGroup())
  // to avoid an error message thrown by controlP5.

  if (theEvent.isGroup()) {
    // check if the Event was triggered from a ControlGroup
    println("event from group : "+theEvent.getGroup().getValue()+" from "+theEvent.getGroup());
    //    println("getgroup: ", theEvent.getGroup().toString());
    if (theEvent.getGroup().toString().equals("serial ports select d1 [DropdownList]")) {
      println("got a serial ports select event: ");
      println(theEvent.getGroup().getCaptionLabel().getText());//this should be the portname, as a string
      if (port != null) {
        port.clear();
        port.stop();
        println("closed old port, opening new one...");
      }
      port = new Serial(this, theEvent.getGroup().getCaptionLabel().getText(), serialSpeed);
    }
  }
  else if (theEvent.isController()) {
    println("event from controller : "+theEvent.getController().getValue()+" from "+theEvent.getController());
  }
}