reading CTRL-z in keyPressed()

Chrisir

hello all,

how can I read CTRL-z in keyPressed() ?

thank you !

Best, Chrisir ;-)

GoToLoop

CTRL+Z is key 26, 032 or 0x1A.
https://en.Wikipedia.org/wiki/Control-Z

Chrisir

doesn't work.

do you mean

switch (keyCode) {

    case 26:

Chrisir

ah, I got it - I have to use key

thanks, mate!

GoToLoop

• keyCode only cares for individual keyboard keys.
• Neither key combos nor lowercase letters can be distinguished by keyCode.
• For such cases we need to rely on key instead.

Chrisir

Thank you!

Chrisir

...and how can I read F1, F2, F3........ please?

Thank you!

GoToLoop

You can copy, paste & run this sketch in Processing to find out all keyCode values by pressing them:
http://studio.ProcessingTogether.com/sp/pad/export/ro.9cfU11egvzT6G

Or you can look up their corresponding constants in KeyEvent's class ref doc:
http://docs.Oracle.com/javase/8/docs/api/java/awt/event/KeyEvent.html#field.summary

For example, VK_F1 is 112 as keyCode: ;)

import static java.awt.event.KeyEvent.*;
println(VK_F1); // 112
exit();

Chrisir

Without using import:

when I just use keyCode == 112

It seems keyCode gives 2 values directly after another?

GoToLoop

It works just fine when I hit F1 and other F keys when using the online sketch in the PDE.

Can you post your problematic sketch then? ~:>

jeremydouglass

@Chrisir -- re:F1 key etc., check out the thread:

• F1 key event checks https://forum.processing.org/two/discussion/comment/74320/#Comment_74320

Chrisir

Thanks everybody, I appreciate it

Lord_of_the_Galaxy

@Chrisir

It seems keyCode gives 2 values directly after another?

Can you elaborate more?

prince_polka

@Chrisir Your question gave me an idea to make a Varargs function, which is something I'we wanted to do but didn't have an idea for what it would do!

No one should use this function for keyboard shortcut's as @GoToLoop 's solution is simple, robust and has the wider support.

I don't know about anything that requires arbitrary key press combos other than fighting games, and this isn't good for that, as it's too crude and just written for practicing varargs.
And most keyboards aren't good for it either.

void setup() {}
void draw() {
  background(keycombo(70,71,72)?255:0); // white if F+G+H is pressed, otherwise black
}
/* keycombo(int... takes N number of keycodes and returns true if ALL of those are held, irrregardles of order pressed, or if other keys are held as well*/
boolean[] keysheld = new boolean[128]; /* not sure if 128 is the right number */
void keyPressed() { keysheld[keyCode]=true; /* println(keyCode); */}
void keyReleased(){ keysheld[keyCode]=false; }
boolean keycombo(int...k){
  for (int i=0; i<k.length; i++)
  { if (!keysheld[k[i]]){ return false;} }
  return true;
}

Chrisir

Thanks!

This code works for me for F1

void setup() {
  size(222, 300);
}

void draw() {
}

void keyPressed() {
  if (key==CODED) {
    // coded 
    if (keyCode == java.awt.event.KeyEvent.VK_F1) { // 112
      println("F1 -----------");
    } else {
      println(keyCode);
    }
  }
}

Chrisir

and this doesn't work because of P3D

it's a bug !!!! And I was thinking I was mixing things up a bit.

see also here https://github.com/processing/processing/issues/4654

void setup() {
  size(222, 300, P3D);
}

void draw() {
}

void keyPressed() {
  if (key==CODED) {
    // coded
    if (key=='g') 
      println ("not possible."); 
    keyPressed2();
  }
}

void keyPressed2() {
  if (key==CODED) {
    // coded 
    if (keyCode == java.awt.event.KeyEvent.VK_F1) { // 112
      println("F1 -----------");
    } else {
      println(keyCode);
    }
  }
}