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

boolean savePDF = false;
ControlP5 controlP5;

void setup() {
  size(720, 720);
  background(0);

  if (frame != null) {
   frame.setResizable(true);
  }
  
  colorMode(HSB, 360, 100, 100);
  rectMode(CENTER); 
  noStroke();
  
  setGUI();
  
  //fullScreen();    
  //noCursor();
  //frameRate(30);
}

/**
  *  mouseX, mouseY      current position of the mouse
  *  pmouseX, pmouseY    previous position of the mouse
  *
  *  width, height       width and hight of the window
  *
  *  line(x1, y1, x2, y2)              line from (x1, y1) to (x2, y2)
  *  rect(x, y, width, height)         rectangle
  *  ellipse(x_c, y_c, width, height)  ellipse
  *  triangle(x1, y1, x2, y2, x3, y3)  triangle
  *  point(x, y)                       point of size 1px
  *
  *  stroke(35)          color of stroke in grayscale
  *  stroke(25, 25, 25)  color of stroke in given color scale (RGB/HSB)
  *  noStroke()
  *  strokeWeight(3)     width of stroke in px
  *  fill(35) / fill(35, 35, 35)   fill color in grayscale / color scale
  *  noStroke()
  *
  */
void draw() {
  // this line will start pdf export, if the variable savePDF was set to true 
  if (savePDF) beginRecord(PDF, timestamp()+".pdf");

  // overdraw each frame with a new background
  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();
  }
}





// ----- User interactivity ----- 

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

void mousePressed() {
  
}



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

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

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