float xpos;
float ypos;
float rectW;
float rectH;
import promidi.*;

MidiIO midiIO;

void setup(){
 size(640, 480);
 smooth();
 background(0);
 
 //get an instance of MidiIO
 midiIO = MidiIO.getInstance(this);
 println("printPorts of midiIO");
 
 //print a list of all available devices
 midiIO.printDevices();
 
 //open the first midi channel of the first device
 midiIO.openInput(0,0);
 midiIO.openInput(1,0);
 frameRate(30);
}

void draw(){
 moveBox();
}
void moveBox() {
 if (rectW < 20){
  rectW = 20;
 }else if (rectH <20){
  rectH=20;
 }
 
rect(xpos, ypos, rectW, rectH);
}

void controllerIn(Controller controller, int device, int channel){
 if (controller.getNumber() == 4){
  xpos = controller.getValue() * 5;
 } else if (controller.getNumber() == 5){
  ypos = controller.getValue() *4;
 }
 else if(controller.getNumber() ==6){
  rectW = controller.getValue() *2;
 }else if (controller.getNumber() ==7){
 rectH = controller.getValue() *2;
 }
 
 
 println(controller.getValue());
}




Hello i am tiring to just draw a single box.  When i run this code it draws a new box every time i change a value.  sorry for the messy code.  I am probably just missing a simple line of code but cant seem to figure it out.  Any help will be much appreciated.  Thanks

The noteOff events in the controllerIn method are a bug in promidi, I fixed this in the current release which needs a bit more testing but will be released at the end of this week.