import processing.pdf.*;
import java.util.Calendar;
import controlP5.*;

boolean savePDF = false;
ControlP5 controlP5;

void setup() {
  size(720, 720);
  if (frame != null) {
   frame.setResizable(true);
  }
  //noCursor();
  setGUI();
}

void setGUI() {
    controlP5 = new ControlP5(this);
    controlP5.addButton("Save",1,70,10,60,20);
  }


void draw() {
  // this line will start pdf export, if the variable savePDF was set to true 
  if (savePDF) beginRecord(PDF, timestamp()+".pdf");

  colorMode(HSB, 360, 100, 100);
  rectMode(CENTER); 
  noStroke();
  background(mouseY/2, 100, 100);

  fill(360-mouseY/2, 100, 100);
  rect(360, 360, mouseX+1, mouseX+1);
  

  // end of pdf recording
  if (savePDF) {
    savePDF = false;
    endRecord();
  }
}


void controlEvent(ControlEvent theEvent) {
  if(theEvent.isController()) { 
//   if(theEvent.controller().name()=="Save") {
  if(theEvent.controller().getName()=="Save") {
      savePDF = true;
    }
  }  
}



void keyPressed() {
  if (key=='s' || key=='S') saveFrame(timestamp()+"_##.png");
  if (key=='p' || key=='P') savePDF = true;
  
}


String timestamp() {
  Calendar now = Calendar.getInstance();
  return String.format("%1$ty%1$tm%1$td_%1$tH%1$tM%1$tS", now);
}