Looped action on button counting up (or down)

programming flash
1

I’m kind of embarrassed I couldn’t figure this one out, I couldn’t find anything on either of the steps needed to pull this off, so I must be calling them by the wrong name or something.

What I’m doing is making a key listener so that when I hold down to the right, a number (in a text box) counts up, when I hold down left, it counts down. The range for the number is 0-255.

I assume I have to make a for loop that checks at a certain interval whether right or left is being pressed, then some sort of if statement seeing if it’s over 255 or under 0, but for some reason, I can’t figure out how to actually make any of that code.

2

So, do you have the code for the text box counting up and down working? If so, just add an if clause inside that action:


if (Number(_root.myTF.text) > 255) {
    trace("number greater than 255");
} else if (Number(_root.myTF.text) < 0) {
    trace("number less than 0");
}

You could also check that condition somewhere else, perhaps with a setInterval function, or whenever a certain button is pressed, etc.

Does that help?

-thesean

3

Yes, that definitely helps. I do not have the counting thing working, though, none of it. The problem is that I have a pretty good idea of what I have to do but no idea how to write the code I need.

So now we have the range limiter, just have to figure out how to write the hold button down and have it count up!

4

Here you go:

count = 0;
var keyListener:Object = new Object();
keyListener.onKeyDown = function() {
if (Key.isDown(Key.RIGHT) && count < 255) {
count++;
}
if (Key.isDown(Key.LEFT) && count > 0) {
count--;
}
myTextField.text = count;
};
Key.addListener(keyListener);
5

To display it in a dynamic textfield, change

trace(count);

to

myTextField.text = count;
6

Dude, seriously thank you so much. This not the first time you’ve saved me! Works like a charm!