How to make a keyPressed into a toggle?

koko

Hello world.

I'm currently using this code to flicker through a folder of imagery in my data folder.

//declare and initialise variables
static final int BACKS = 4;
final PImage[] bgs = new PImage[BACKS];


void setup () {
  size (1920, 1080);
  frameRate (6); //Rate of flickering
    smooth (4);

  //load my imagery
      for (int i = 0; i < BACKS; bgs[i] = loadImage("bg" + i++ + ".jpg")); 

    }

void draw () { 

      image(bgs[int(random(0, BACKS))], 0, 0, width, height);//Set a random Image - the size of the sketch
        if ((keyPressed == true) && (keyCode == UP)) { //THIS IS WHAT STOPS THE LOOP
        noLoop ();

    }
  }

When i press the UP key the looping stops, but is there a way i can press the UP key again for it to begin looping again?

Any help would be great!

Thanks - KOKO.

GoToLoop

https://Processing.org/reference/keyPressed_.html

GoToLoop

// forum.Processing.org/two/discussion/17403/
// how-to-make-a-keypressed-into-a-toggle

// GoToLoop (2016-Jul-03)

boolean paused;

void setup() {
  size(300, 200);
  frameRate(1);
}

void draw() {
  background((color) random(#000000));
  frame.setTitle("Frame: #" + frameCount);
}

void keyPressed() {
  int k = keyCode;

  if (k == UP)
    if (paused ^= true) {
      noLoop();
      frame.setTitle("PAUSED");
    } else loop();
}

koko

With this code, i receive the error : 'expecting EOF found 'if' over the line if (k == UP)

Chrisir

do you have all }

line 26?

koko

I do indeed mate, here's what i got.

//declare and initialise variables
static final int BACKS = 4;
final PImage[] bgs = new PImage[BACKS];

boolean paused; 

void setup () {
  size (1920, 1080);
  frameRate (6); //Rate of flickering
    smooth (4);

  //load my imagery
      for (int i = 0; i < BACKS; bgs[i] = loadImage("bg" + i++ + ".jpg")); 
}

void draw () { 

  image(bgs[int(random(0, BACKS))], 0, 0, width, height);     //Set a random Image - the size of the sketch 
      frame.setTitle("Frame: #" + frameCount);

}

void keyPressed () ;

  int k = keyCode;

  if (k == UP)
   if (paused ^= true) {
      noLoop();
      frame.setTitle("PAUSED");
    } else loop();
   }

Chrisir

after line 23 } instead of ;

koko

Many thanks amigo's!