Processing 1.0 - Processing Discourse - embedding a PApplet in another PApplet

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Index › Programming Questions & Help › Programs › embedding a PApplet in another PApplet

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embedding a PApplet in another PApplet (Read 741 times)

mog

embedding a PApplet in another PApplet
Mar 23^rd, 2009, 4:52pm

I wanted to ask if embeding a PApplet in another PApplet is possible. I know that PApplet can by included in a Swing application but I wanted to write a whole application from smaller processing apps.
The most basic code to demonstrate my problem:

//The main class which loads a child applet
TestP5 t = null;

void setup(){
size( 800 , 600 );
t = new TestP5();
t.init();
}

void draw(){
background( 0 );
t.draw(); //i also tried without this lint => same result
}

//the child applet
class TestP5 extends PApplet{
void setup(){
size( 300 , 300 );
}

void draw(){
background( 255 );
fill( 0 );
rect( 0 , 0 , 100 , 200 );
}
}

The expected result would be a 800x800 window with a 300x300 black rectangle which contains another black rectangle... Both work separately but i can't 'glue' them together (thou i get no errors)
I'm obviously missing something but I can't figure out what it is. Please help me with that

NoahBuddy

Re: embedding a PApplet in another PApplet
Reply #1 - Mar 23^rd, 2009, 4:57pm

Using "add(t);" will insert t into your primary applet.
For more details, see this link:

http://dev.processing.org/reference/core/javadoc/processing/core/PApplet.html

If you only need a second area that would be drawn to the same form, I would recommend using a PGraphics object instead.

http://processing.org/reference/PGraphics.html

mog

Re: embedding a PApplet in another PApplet
Reply #2 - Mar 23^rd, 2009, 5:15pm

Thank You for Your reply. Unfortunately it doesn't seem to work. frame is set no != null in draw method, so i modified my code to

//The main class which loads a child applet
TestP5 t = null;
boolean frameAdded = false;

void setup(){
size( 800 , 600 );
t = new TestP5();
t.init();
}

void draw(){
background( 0 );
if( frame != null && frameAdded != true ){
frame.add( t );
frameAdded = true;
}
t.draw();
}
//... rest of the code

...and the result is the same. If this doesn't work out I'll write an Swing app that contains a few PApplets that communicate with each other. I just wanted to avoid Swing.
Using PGraphics is not my case since I'm processing real time video in the other applet.

NoahBuddy

Re: embedding a PApplet in another PApplet
Reply #3 - Mar 23^rd, 2009, 5:21pm

I'm sorry, I realized after that I was using "add(t);" and not "frame.add(t);".

Try this:

Code:



TestP5 t;

void setup() {
  size(640,480);
  
  setLayout(null);//allows placement anywhere
  
  t = new TestP5();
  t.init();
  t.setBounds(40,40,300,300);
  add(t);
  
  frameRate(30);
}

void draw() {
  background(0,64,0);
  t.redraw();
}


class TestP5 extends PApplet {
  TestP5() {
    super();
  }
  
  void setup() {
    size(300,300);
    noLoop();
  }
  
  void draw() {
    background(0);
    rect(20,20,50,50);
  }
  
}

mog YaBB Newbies Offline Posts: 11	Re: embedding a PApplet in another PApplet Reply #4 - Mar 23^rd, 2009, 5:23pm Thank You very much! Works like a charm. I wouldn't figure it out by myself.

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