/*Dropdown list made by Dumle29 (Mikkel Jeppesen) for processing,
it uses the ControlP5 library and the processing.Serial library
*/

import controlP5.*;              // Import the Serial, and controlP5 libraries.
import processing.serial.*;

ControlP5 controlP5;             // Define the variable controlP5 as a ControlP5 type.
DropdownList ports;              // Define the variable ports as a Dropdownlist.
Serial myPort;                     // Define the variable port as a Serial object.
int Ss;                          // The dropdown list will return a float value, which we will connvert into an int. we will use this int for that).
String[] comList ;               // A string to hold the ports in.
boolean serialSet;               // A value to test if we have setup the Serial port.
boolean Comselected = false;     // A value to test if you have chosen a port in the list.

char[] val = new char[10];      // Data received from the serial port
boolean packetStart = false;
boolean hasPrinted = false;
int reading;
int count = 0;

void setup() {
  // Set the size, for this example 120 by 120 px is fine.
  size(400,128);
  textSize(128);
  controlP5 = new ControlP5(this);
  ports = controlP5.addDropdownList("list-1",10,25,100,84); //Make a dropdown list called ports. ("name", left margin, top margin, width, height (84 here since the boxes have a height of 20, and theres 1 px between each item so 4 items (or scroll bar).
  // Setup the dropdownlist by using a function. This is more pratical if you have several list that needs the same settings.
  customize(ports);
}

// The dropdown list returns the data in a way, that i dont fully understand, again mokey see monkey do. However once inside the two loops, the value (a float) can be achive via the used line ;).
void controlEvent(ControlEvent theEvent) {
  if (theEvent.isGroup())
  {
    // Store the value of which box was selected, we will use this to acces a string (char array).
    float S = theEvent.group().value();
    // Since the list returns a float, we need to convert it to an int. For that we us the int() function.
    Ss = int(S);
    // With this code, its a one time setup, so we state that the selection of port has been done. You could modify the code to stop the serial connection and establish a new one.
    Comselected = true;
  }
}

// Here we setup the dropdown list.
void customize(DropdownList ddl)
{
  ddl.setBackgroundColor(color(200)); // Set the background color of the list (you wont see this though).
  ddl.setItemHeight(20); // Set the height of each item when the list is opened.
  ddl.setBarHeight(15);// Set the height of the bar itself.
  ddl.captionLabel().set("Select serial port"); // Set the lable of the bar when nothing is selected.
  ddl.captionLabel().style().marginTop = 3; // Set the top margin of the lable.
  ddl.captionLabel().style().marginLeft = 3; // Set the left margin of the lable.
  ddl.valueLabel().style().marginTop = 3; // Set the top margin of the value selected.

  comList = myPort.list(); // Store the Serial ports in the array comList.
  int size = comList.length; // Get the amount of ports
  for(int i=0; i< size; i++) // Add the ports to the list
  {
    ddl.addItem(comList[i],i);
  }
  ddl.setColorBackground(color(60)); // Set the color of the background of the items and the bar.
  ddl.setColorActive(color(255,128)); // Set the color of the item your mouse is hovering over.
}

void startSerial(String[] theport)
{
  myPort = new Serial(this, theport[Ss], 9600); // When this function is called, we setup the Serial connection with the accuried values. The int Ss is the Serial select int we use.
  serialSet = true; // Since this is a one time setup, we state that we now have set up the connection.
  controlP5.hide(ports);  println("removed");
  //println(ports);
}


void draw() {
  background(0);

  while(Comselected == true && serialSet == false) // Setup the serial port once when we have chosen a port
  {
    startSerial(comList);
  }

  while(Comselected && serialSet) // When we are all set, and a serial link has been established, start monitoring the temp.
  {
    if ( myPort.available() > 0)
    {
      reading = myPort.read(); // Get a byte

      if(reading == 'S') // If it's S as in start
      {
        count = 0; // Reset the count of bytes recieved
        //print("Start");
        packetStart = true;
      }
      else if(reading == 'E')
      {
        myPort.read();
        //println("End");
        packetStart = false;
        hasPrinted = false;
      }

      if(packetStart && reading != 'S' && reading != 'E')
      {
        val[count] = char(reading);         // read it and store it in val
        count++;
      }
    }

    if(!packetStart && !hasPrinted)
    {
      for(int i=0; i<count; i++)
      {
        if(i == count-1)
        {
          println(val[i]);
        }
        else
        {
          print(val[i]);
        }
      }
      hasPrinted = true;
    }
    text(val, 0, 5, 10, 108);
    fill(255);
  }
}