Hi all!

1. Here are some stupid beginner questions, I hope someone can help.

I try to learn processing and write a sketch that draws something on a pdf document with variable width and hight.
After digging in the documentation I figured that

Code:

pGraphics(x, y, PDF, "output,pdf"); 

in the draw() function might do the job. Would this work?

2. In the pgraphics example here:

Code:

PGraphics pg;

void setup() {
  size(100, 100);
  pg = createGraphics(80, 80, P3D);
}

void draw() {
  pg.beginDraw();
  pg.background(102);
  pg.stroke(255);
  pg.line(40, 40, mouseX, mouseY);
  pg.endDraw();
  image(pg, 10, 10); 
} 

The last function is Code:

image(pg, 10, 10); 

I understand that it shows the content of pg.
I could not find out if it is required?

Another thing: I just get an empty pdf document, do I have to call exit()?

any help appreciated, couldn't find anything in the documentation and I am in that state where you try to hypnotize the code just staring at it

DOGMATECH wrote on Jan 20^th, 2010, 11:30pm:

No.
First, Java is case sensitive, so it would be PGraphics. Second, I see no code like this in the PDF reference page, the examples use createGraphics() (or beginRecord(), or size()). Last, you don't create graphics in draw() but rather on setup.

DOGMATECH wrote on Jan 21^st, 2010, 12:53am:

What do you mean exactly
You set a PDF size, indeed, at the size you specify. If you use only Processing shape functions like line(), rect() and ellipse(), the outputted PDF will be scalable, as the drawing will be stored as vectors.

Allright, found solutions to all the problems.

Code:

pg = (PGraphicsPDF) createGraphics(wide, hi, PDF, "raster-###.pdf"); 

does the job, and since the application exits after the conditions are done I can call it in draw().

Check the first version here:

Code:

//*****(c)2010 by Philippe Bono*****
//*****licensed under GPL*****

import processing.pdf.*;
import interfascia.*;

//radio declarations
GUIController c;
IFRadioController rc;
IFRadioButton b1, b2, b3;
//textfield stuff
IFTextField tw, th;
IFLabel lw, lh;

//declare PG
PGraphicsPDF pg;

//Grid variables
int x1;
int y1;
//for precise calculation
float mmX;
float mmY;
//input
String xStr;
String yStr;
//pdf groesse
int wide;
int hi;

/*********************************************
*SETUP
**********************************************/
void setup() {
  size(400, 400);
   
  //Text Field creation  
  th = new IFTextField("Text Field", 25, 10, 40);
  lh = new IFLabel("Breite in milimetern", 80, 10);
  
  tw = new IFTextField("Text Field", 25, 40, 40);
  lw = new IFLabel("hoehe in milimetern", 80, 40);
 
  //Radio Button creation
  c = new GUIController(this);
  rc = new IFRadioController("Mode Selector");
  
  b1 = new IFRadioButton("72 dpi", 20, 70, rc);
  b2 = new IFRadioButton("150 dpi", 20, 90, rc);
  b3 = new IFRadioButton("300 dpi", 20, 110, rc);
    
}

/*********************************************
*DRAW
**********************************************/
void draw(){
  
  c.add(tw);
  c.add(lw);
  
  c.add(th);
  c.add(lh);
  
  xStr = tw.getValue();
  yStr = th.getValue();
  
  //println(yStr);
  //println(xStr);
  
  c.add(b1);
  c.add(b2);
  c.add(b3);
  
  /*******das folgende ist getestet und funktioniert, die werte werden correct uebernommen******/
  if (b1.isSelected() == true){
    wide = 595;
    hi = 840;
       
  } else if (b2.isSelected() == true){
    wide = 1240;
    hi = 1745;    
    
  } else if (b3.isSelected() == true){
    wide = 2480;
    hi = 3508;    
    
  } 
  
  
  if (b1.isSelected() == true || b2.isSelected() == true || b3.isSelected() == true){
    
    //3satze
    
    mmX = (Integer.parseInt(xStr)*wide)/210; //297*210 ist din a4 in milimetern
    //println(mmX);
    x1 = (int) mmX;
    
    mmY = (Integer.parseInt(yStr)*hi)/297;
    y1 = (int) mmY;
    
    //***********pgGraphics screen************************
    pg = (PGraphicsPDF) createGraphics(wide, hi, PDF, "raster-###.pdf");
   
    //println (hi);
    //println(wide);
    
    beginRecord(pg);  
   
    background (255);   
    //pg.stroke(111);
  
   for (int i = 1; i < hi; i++) {
      line(0, i*x1, wide, i*x1); //das ist die breite X
      line(i*y1, 0, i*y1, hi); //das ist die hoehe y
   if (i >= hi){ //soll den for loop brechen falls bedingung erfuellt
      break;
      }
     //println(i); 
   }
    
   endRecord();
   exit();   
  } 
    
}