This tutorial cover how to save/load static parameters in your projects.

In a newRGG project, add a new file called “paramfile”. (in the file explorer click “new>file>” enter paramfile - no extensions).

In the Model.rgg file copy:

import java.io.Writer;
import java.io.Reader;
 
 
import de.grogra.pf.ui.registry.RunAfterSave;
import de.grogra.pf.ui.registry.RunAfterLoad;
import de.grogra.pf.registry.RegistryContext;
 
 
global float myFloat = 1f;
public static int myInt = 3;
public static String myString = "initValue";
 
public class LoadParam implements RunAfterLoad{
	public void load(RegistryContext ctx){
		Object f = getFileFromProject("paramfile");
		Reader r = ctx.getRegistry().getFileSystem().getReader(f);
		char[] buf = new char[2048];
		r.read(buf);
		String alltext = new String (buf);
		String[] lines = alltext.split("\n");
		for (String line : lines){
			String[] param = line.split("=");
			if ("myInt".contentEquals(param[0])) {
				myInt = Integer.valueOf(param[1]);
			} else 
			if ("myString".contentEquals(param[0])){
				myString = param[1];
			}
		}
	}
}
 
public class SaveParam implements RunAfterSave{
	public void save(RegistryContext ctx){
		Object f = getFileFromProject("paramfile");
		Writer w = ctx.getRegistry().getFileSystem().getWriter(f, false);
		w.append("myInt="+myInt+"\n");
		w.append("myString="+myString+"\n");
		w.close();
	}
}
 
protected void init ()
[
	Axiom ==> ;
]
public void r(){
	myInt ++;
	myString = "anotherValue";
        myFloat++;
}
 
public void p ()
{
println(myInt);
println(myString);
println(myFloat);
}