multi_window_app_subclass.pde

PGraphics pg;
PSurface surf;

MyWindow win;

void settings() {
  size(320, 240);    
}
  
void setup() {
  pg = createGraphics(500, 200);
  surf = pg.createSurface();
  
  win = new MyWindow();
  
  surf.initFrame(win);
  surf.placeWindow(new int[] {100, 100}, null);
  surf.setVisible(true);
  surf.startThread();
}

void draw() {
  background(255, 0, 0);
  fill(255);
  rect(10, 10, frameCount, 10);
}

void mousePressed(){
  println("mousePressed"); 
}

class MyWindow extends PApplet{
  void setup(){
      background(0);
  }
  
  void draw(){
  }
}