Hiya,

Firstly, I'm soo new to this.

I've noticed that when I write sketches they run fine when I click the play button. But when I export them to web format, I just get a blank canvas?

Also when I click on the java executable it created it says..

can't find class program will exit.

Am I missing a vital step here?

Here is a copy of the sketch I am trying to export:


import processing.serial.*;

// The serial port:
Serial port;

import controlP5.*;

ControlP5 controlP5;

int myColorBackground = color(0,0,0);

void setup() {
 port = new Serial(this, Serial.list()[2], 9600);
 size(400,400);
 frameRate(30);
 controlP5 = new ControlP5(this);
 controlP5.addBang("bang",40,200,120,40);
 for(int i=0;i<4;i++) {
   controlP5.addBang("bang"+i,40+i*80,100,40,40).setId(i);
 }
 controlP5.controller("bang").setLabel("changeBackground");
}

void draw() {
 background(myColorBackground);
}

void bang() {
 int theColor = (int)random(255);
 myColorBackground = color(theColor);
 println("a bang event. setting background to "+theColor);
}

void controlEvent(ControlEvent theEvent) {

 if (theEvent.controller().id()== 0){
   println("hello!!!");
   port.write('A');              //send A to serial port
 }
 else
 {
   port.write('a');              //send a to serial port
 }
 println(
 "## controlEvent / id:"+theEvent.controller().id()+
   " / name:"+theEvent.controller().name()+
   " / label:"+theEvent.controller().label()+
   " / value:"+theEvent.controller().value()
   );
}



Thanks in advance,

Dan.

Thanks for speedy reply! When I have my sketch loaded in the processing IDE, I click on the export button >|

Then it writes a whole bunch of stuff to a folder which I presume is the contents for a web page that will display your sketch.

When I click on the index.html document it loads up a web page which has info about my sketch and a big blank square which I would expect to show my applet (I think that's what it's called?)

(not that it helps but) Here is the address to the page on my local machine:
file:///C:/Documents%20and%20Settings/Daniel%20Thompson/My%20Documents/Processin
g/bang_to_serial_Example_v001_001_dt/applet/index.html

I am on windowsXP service pack 2. I'm sending serial info to my arduino card via USB.

As I mentioned before the application works fine when I run it from the IDE, just not from a browser?

Again, why do you want to use in on the Web?
If people have the same device as you, they can probably download the jar and run it, no? Or even just run the sketch if they have Processing.

Perhaps you can make it run on the Web if that's really what you want, but like all applets using low level system services, the applet have to be signed. See the corresponding Hacks.