gpioprocessingtest.pde

import processing.io.*;

boolean ledStatus = false;
int rectX = 50;
int rectY = 50;
int rectW = 200;
int fillCol;

void setup() {
  size(300,300);
  GPIO.pinMode(17,GPIO.OUTPUT);  
  
  background(255);
  stroke(0);
  strokeWeight(3);
}

void draw() {
  if (ledStatus) {
    // if led on, fill rectangle light grey
    fillCol = 200;  
  } else {
    // if led off, fill rectangle dark grey
    fillCol = 150;  
  }
  fill(fillCol);
  
  // draw the button
  rect(rectX,rectY,rectW,rectW);
  
  // turn on/off led
  GPIO.digitalWrite(17,ledStatus);  
}

void mouseClicked() {
  // if mouse pos in button boundary, change led status
  if (mouseX > rectX && mouseX < rectX + rectW) {
    if (mouseY > rectY && mouseY < rectY + rectW) {
      ledStatus = !ledStatus;  
    }
  }
}

void keyPressed() {
  // if key pressed, quit program
  GPIO.releasePin(17);
  exit();
}