Key

Bilha

Am stuck in writting the following

PhiLho

Looks like an assignment, we generally avoid giving the solution to these, but we are ready to help / guide you. (Note that we don't have a MapThing handy, probably, so it is hard to build on something we ignore.)

So, what you have tried so far? Are you stuck at a given point? Where do you need help?

Bilha

Is is just an exercise for self study. I tried but nothing is running.

PhiLho

Show your code.

GoToLoop

Hey ya! I did a template for key toggle state; so you gotta a place to start: =:)

// forum.processing.org/two/discussion/949/key-pressed

final static int REGIONS = 0, ROADS = 1, RIVERS = 2;
int selection = REGIONS;

boolean showAirports = true, showTowns = true, showPans = true;

void setup() {
  size(250, 250);
  smooth();

  noLoop();
  frameRate(5);

  textSize(030);
  fill(#E0F040);
}

void draw() {
  clear();

  text("[A]irports:  " + showAirports, 40, 50);
  text("[T]owns:    "  + showTowns, 40, 100);
  text("[P]ans:      " + showPans, 40, 150);
  text("[R]egions:   " + selection, 40, 200);
}

void keyPressed() {
  switch (keyCode) {
  case 'A':    
    showAirports = !showAirports;
    break;

  case 'T':
    showTowns = !showTowns;
    break;

  case 'P':
    showPans = !showPans;
    break;

  case 'R':
    selection = (selection + 1) % 3;
  }

  redraw();
}