ac,

Your wrapper is excellent! I have a couple of questions:

When you're using the JPen library, do you have to call some function to stop it or release resource when you close your program?

I found my genius-brand tablet lose its pressure reading after I start my sketch and stop it a few times but this occurs randomly. The tablet pen becomes a mouse pointer and its pressure is either 0 or 0.5 I guess. My solution is to unplug it and plug it back. Maybe it's my tablet or maybe I didn't release some resource and that prevents future access to the tablet.

Any help is highly appreciated.

It's working fine for me.
libraries\protablet\library is it what you have?

Also, I was so pleased to play back with my tablet, it went fluidly and I was so productive that I've almost forgotten to say thank you.

Thank you very much!...

I tested my tablet demo code with jpen-2.dll and jpen-2.jar in a code folder in the sketch folder.

Just thought I'd post a simple program I made using this - using the tablet as a simple synthesiser (very basic). I've still got using the tablet for something in the back of my mind.... I might even develop this program more with buttons etc for turning different effects on and off - or maybe using the existing buttons on the Wacom tablet.

Code:

import ddf.minim.*;
import ddf.minim.signals.*;
import codeanticode.protablet.*;
 
Minim minim;
AudioOutput out;
SineWave sine;
SawWave saw;
Tablet tablet;
float proportion;

void setup()
{
  size(1024, 768);
  background(0);
  tablet = new Tablet(this);
  minim = new Minim(this);
  // get a line out from Minim, default bufferSize is 1024, default sample rate is 44100, bit depth is 16
  out = minim.getLineOut(Minim.STEREO);
  // create a sine wave Oscillator, set to 440 Hz, at 0.5 amplitude, sample rate from line out
  sine = new SineWave(440, 0.5, out.sampleRate());
  saw = new SawWave(440, 0.5, out.sampleRate());
  // set the portamento speed on the oscillator to 200 milliseconds
  sine.portamento(200);
  saw.portamento(200);
  // add the oscillator to the line out
  out.addSignal(sine);
  out.addSignal(saw);
}
 
void draw()
{
  fill(0, 10);
  noStroke();
  rect(0,0,width, height);
  stroke(255);
  if (mousePressed && mouseX > 0 && mouseX < width && mouseY>0 && mouseY<height) 
  {
     strokeWeight(30 * tablet.getPressure());
     line(pmouseX, pmouseY, mouseX, mouseY);
  }
    if ( out.hasControl(Controller.GAIN) )
  {
    
    float val = tablet.getPressure();
    out.setGain(-80+val*128);
  }
  
  float freq = map(mouseY, 0, height, 1500, 60);
  sine.setFreq(freq);
  saw.setFreq(freq);
  proportion=map(mouseX, 0, width, 0, 1);
  sine.setAmp(proportion);
  saw.setAmp(1-proportion);

}

 void stop()
{
  out.close();
  minim.stop();
 
  super.stop();
}