Is there a way to prevent Processing from opening a graphics window?

Processing Coding Questions
1

Hi there. I would like to write a program that only has text output. Is there a way to prevent processing from opening a graphics window?
Thanks for your help.
Cheers, Adrian.

2

Yes there is!
While it is possible to hide the window you can prevent it from opening in the first place! This would be an example:
NONERenderer.java

import processing.core.*;
public class NONERenderer extends processing.core.PGraphics {
  public PApplet instance;
  public NONERenderer() {
  }
  @Override
    public void setParent(PApplet p) {
      instance=p;
  }
  @Override
    public void setPrimary(boolean b) {
  }
  @Override
    public PSurface createSurface() {
      return new EmptySurface(this);
  }
  class EmptySurface extends PSurfaceNone{
    EmptySurface(PGraphics pg){
      super(pg);
    }
    @Override
    public void initFrame(PApplet sketch){
      initOffscreen(sketch);
    }
  }
}

MainSketch.pde


void setup() {
  size(100, 100, "NONERenderer");
}
void draw() {
  println("text");
  exit();
}

What this code does is creating a renderer that simmply doesn’t open a window. It is also ill-adviced to try and use graphics-commands on this as there is no window.

1 Like
3

Another option is to just not show the window (may see flash):

void setup(){
    surface.setVisible(false);
}
2 Likes
4

Great, It works flawlessly.
Thanks guys!
Cheers,
Adrian.

5

This is what i use when crunching numbers, sometimes when you push escape to close the window and it doesn’t work until you click, use surface.setVisible(true) and it works every time