Hey all,
I'm working on some physics/game stuff... not typical Flex area of concern,
but... well
eventually I'll be making use of the Flex specific stuff, and for now I want to
write in in AS3
and am on a Mac, so no AS3 Preview for me... :(
Anyways, I wrote a little function to try and capture "persistent" key press...
as the
Key.isDown() got deprecated. It looks like this:
private var l:uint; //left
private var u:uint; //up
private var r:uint; //right
private var d:uint; //down
private function persistKeyDown(event:KeyboardEvent):void
{
if(event.keyCode == Keyboard.LEFT)
{
l = setInterval(control, 10, event);
}
if(event.keyCode == Keyboard.UP)
{
u = setInterval(control, 10, event);
}
if(event.keyCode == Keyboard.RIGHT)
{
r = setInterval(control, 10, event);
}
if(event.keyCode == Keyboard.DOWN)
{
d = setInterval(control, 10, event);
}
//tFrame.text = "keyDown: " + event.keyCode;
}
private function persistKeyUp(event:KeyboardEvent):void
{
if(event.keyCode == Keyboard.LEFT)
{
clearInterval(l);
}
if(event.keyCode == Keyboard.UP)
{
clearInterval(u);
}
if(event.keyCode == Keyboard.RIGHT)
{
clearInterval(r);
}
if(event.keyCode == Keyboard.DOWN)
{
clearInterval(d);
}
//tFrame.text = "keyUp: " + event.keyCode;
}
The control function just applies forces to an object on the screen. I have
the seperate
intervals for each key so that I can catch simultaneous keys being held down...
is that
right? I think I must be doing something wrong, because, though it works fine
in FireFox,
it behaves all weird in Safari.
You can check it out here:
http://www.noncehence.com/game/experiments/test05.html
Ideally, the green ball should bounce off the walls and the grey box. You'll
have to click
inside the canvas to give it focus, and you can control the green ball with the
arrow keys.
It's actually kind of fun already, but only in FireFox. In Safari, the green
ball seems to get
"stuck" in one direction or another and "magnatize" to a wall.
Is there a difference between how keyDown/Up events are dispatched in various
browsers?
That doesn't make any sense to me... but then, I don't know why I'm having this
problem.
If anyone can help, or has other questions for me, please let me know.
Thanks much,
//Matt
