Loading a sketch within a sketch

appas

Hi, I'm trying to load some sketches within a "master" sketch. I found a neat blog post about it, but am stuck at the stage where child sketches are loaded into the master sketch: Processing can’t find the sketches I’m trying to load. Here's the relevant code. Mine is effectively identical. In the load method, I get java.lang.ClassNotFoundException. If I try myself with PApplet sketch = new Sketchname(), I get “Cannot find class or type Sketchname”. I found a clever way of loading sketches via reflection, but when I try

Class[] classes = getClass().getDeclaredClasses();
int n = classes.length;

I get n = 0. I think this might be due to the sketches not being in the same package. Could this be? I don’t have a package declaration at all, because when I tried to add package org.myorg.something (as the very first line), I got “syntax error on “package”, delete this token”. My sketches are located in the file system like sketchbook/Sketchname.

Any idea what this could be caused by? And how to fix it? I'm using Processing 2.2.1.

GoToLoop

Perhaps my multi-instance PApplet instantiation example might be of some help?
http://forum.processing.org/two/discussion/7036/multiple-screens

static final void main(final String[] args) {
  final String sketch = Thread.currentThread()
    .getStackTrace()[1].getClassName();

  final Class[] nested;
  try {
    nested = Class.forName(sketch).getClasses();
  }
  catch (final ClassNotFoundException cause) {
    throw new RuntimeException(cause);
  }

  println(nested);
  for (int i = 0, ii = max(0, nested.length-2); i != ii; ++i)  try {
    PApplet.main(nested[i].getName(), args);
  }
  catch (final Exception cause) {
    println(nested[i] + " isn't a PApplet or isn't public static!");
  }
}

appas

Perhaps my multi-instance PApplet instantiation example might be of some help?

It is, thanks, but the problem persists. In your example, I take it you have all the classes defined in the same .pde file? I'd like to have one class per file. When I did

      final String sketch = Thread.currentThread()
        .getStackTrace()[1].getClassName();
     
      final Class[] nested;
      try {
        nested = Class.forName(sketch).getClasses();
       println(nested);      
      }

I got class processing.core.PApplet$RendererChangeException class java.awt.Component$BaselineResizeBehavior.

I tried changing my class signature to public static class Classname, but to no avail. My sub-sketches are still not visible to the master sketch. I think it's a scoping problem, but I don't know what to do about it.

GoToLoop

I take it you have all the classes defined in the same .pde file?

If we wish, we can place whole classes in separate ".pde" tabs.
Later PDE's pre-processor will concatenate everything as 1 ".java" file before compilation.

Take notice that PDE's pre-processor got its own template for static void main(String[] args) {}
What I did was replacing it w/ my own which instantiates not only the main sketch, but also any nested public static class which extends PApplet. :-B

GoToLoop

I'll leave you w/ a more complete example here from: http://forum.processing.org/two/discussion/7202/controlp5-controlwindow-and-controlp5frame

It's got a main sketch plus 2 nested sketches: :bz

static final void main(final String[] args) {
  String sketch = Thread.currentThread().getStackTrace()[1].getClassName();

  main(sketch, args);

  Class[] nested;
  try {
    nested = Class.forName(sketch).getClasses();
  }
  catch (ClassNotFoundException cause) {
    throw new RuntimeException(cause);
  }

  println(nested);
  println();

  for (int i = 0, ii = max(0, nested.length - 2); i != ii; ++i)
    try {
      main(nested[i].getName(), args);
    }
    catch (Exception cause) {
      println("Either " + nested[i] + " isn't a PApplet or it isn't public static!");
    }
}

import static processing.opengl.PGraphicsOpenGL.*;

void setup() {
  size(600, 400, P2D);
  smooth(8);
  noLoop();
  background( (color) random(#000000) );

  println( "\n" + isGL() + '\n' );

  println( javaVersionName );
  println( System.getProperty("java.home")  + '\n' );

  println( System.getProperty("os.arch") );
  println( System.getProperty("os.name") );
  println( System.getProperty("os.version") + '\n' );

  println( System.getProperty("user.home") );
  println( System.getProperty("user.dir")   + '\n' );

  println( sketchPath );
  println( dataPath("") );
  println( dataFile("") );

  println( "\n===[ General Info ]===\n" );
  println( "OPENGL_VENDOR: " + OPENGL_VENDOR );
  println( "OPENGL_RENDERER: " + OPENGL_RENDERER );
  println( "OPENGL_VERSION: " + OPENGL_VERSION );
  println( "GLSL_VERSION: " + GLSL_VERSION );

  println( "\n===[ Supported Features ]===\n" );
  println( "anisoSamplingSupported: " + anisoSamplingSupported );
  println( "autoMipmapGenSupported: " + autoMipmapGenSupported );
  println( "blendEqSupported: " + blendEqSupported );
  println( "fboMultisampleSupported: " + fboMultisampleSupported );
  println( "npotTexSupported: " + npotTexSupported );
  println( "packedDepthStencilSupported: " + packedDepthStencilSupported );
  println( "maxSamples: " + maxSamples );
  println( "maxTextureSize: " + maxTextureSize + '\n' );
}

public static final class MyFrame extends PApplet {
  void setup() {
    noLoop();
    println("MyFrame");
  }

  void draw() {
    background(0);
  }
}

public static final class MyApp extends PApplet {
  void setup() {
    size(300, 200, JAVA2D);
    noLoop();
    println("MyApp");
  }

  void draw() {
    background(-1);
  }
}