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Author Topic: A GetKey that doesn't wait?  (Read 9551 times)

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Offline Runer112

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A GetKey that doesn't wait?
« on: November 01, 2010, 11:43:36 pm »
Is there such a thing? I know there are things like GetCSC and direct port input, but I'm wondering if GetKey has a non-waiting equivalent that also uses the A/keyExtend output format.
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Offline FloppusMaximus

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Re: A GetKey that doesn't wait?
« Reply #1 on: November 01, 2010, 11:49:00 pm »
No.  I'm not sure how you would want such a routine to work, but no, it does not exist.  If you have stuff to do in the background while GetKey is running, you can use a cursor hook, GetKey hook, or silent link hook, as appropriate.
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Offline Runer112

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Re: A GetKey that doesn't wait?
« Reply #2 on: November 01, 2010, 11:57:23 pm »
Dang, I have no idea how to use hooks... Anyone know of a good guide explaining how hooks work? Or anyone want to post a whirlwind tour of hooks?
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Offline FloppusMaximus

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Re: A GetKey that doesn't wait?
« Reply #3 on: November 02, 2010, 12:40:54 am »
It's... a bit complicated.  Maybe it would help if you could explain what exactly you're trying to do.
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Offline Builderboy

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Re: A GetKey that doesn't wait?
« Reply #4 on: November 02, 2010, 01:01:32 am »
Isn't there a BCALL somewhere that does exactly that? ???
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Offline FloppusMaximus

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Re: A GetKey that doesn't wait?
« Reply #5 on: November 02, 2010, 01:05:38 am »
Uh... no.  Not what he was asking.  There's GetCSC, which he mentioned, and GetK (BASIC's getKey), which he didn't.  Both of those routines return raw scancodes; they don't handle the shift keys, contrast control, APD, 2nd+Off, TIKB, or silent link.
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Offline Builderboy

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Re: A GetKey that doesn't wait?
« Reply #6 on: November 02, 2010, 01:17:08 am »
ahhh gotcha, i only dabble in Asm so i wasn't 100% sure ^^ thanks for the clarification!
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Offline Runer112

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Re: A GetKey that doesn't wait?
« Reply #7 on: November 02, 2010, 10:24:10 am »
Quote from: FloppusMaximus on November 02, 2010, 12:40:54 am
It's... a bit complicated.  Maybe it would help if you could explain what exactly you're trying to do.

I just want to make a program that can work while waiting for key inputs and accepts key inputs in the A/keyExtend format.
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Offline Deep Toaster

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Re: A GetKey that doesn't wait?
« Reply #8 on: November 02, 2010, 11:38:17 am »
Quote from: Runer112 on November 01, 2010, 11:57:23 pm
Dang, I have no idea how to use hooks... Anyone know of a good guide explaining how hooks work? Or anyone want to post a whirlwind tour of hooks?

thepenguin77 gave me a quick guide earlier: http://ourl.ca/7566/131643
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Offline FloppusMaximus

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Re: A GetKey that doesn't wait?
« Reply #9 on: November 02, 2010, 10:21:03 pm »
Quote from: Runer112 on November 02, 2010, 10:24:10 am
I just want to make a program that can work while waiting for key inputs and accepts key inputs in the A/keyExtend format.

You said that already.  The question is why.  For example, "I'm writing a game in which the user needs to type the answers to trivia questions in l33tspeak, while simultaneously using the arrow keys to dodge attacks from a giant lava monster."  Or "I'm writing a text editor where all the O's are actually eyes, that follow the cursor around the screen and blink at random intervals."
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Offline Runer112

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Re: A GetKey that doesn't wait?
« Reply #10 on: November 02, 2010, 10:32:17 pm »
More like the second. The background processes won't be very intensive, maybe static/slightly dynamic grayscale displaying at most.
« Last Edit: November 02, 2010, 10:34:31 pm by Runer112 »
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Offline Builderboy

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Re: A GetKey that doesn't wait?
« Reply #11 on: November 02, 2010, 10:32:31 pm »
Both of those need to be made right now
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Offline FloppusMaximus

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Re: A GetKey that doesn't wait?
« Reply #12 on: November 02, 2010, 10:53:43 pm »
For grayscale, you might be able to make it work with a GetKey hook, but for accurate timing I'd think you'd want to use an IM 2 handler.  To make grayscale look good, you generally want to have consistent timing regardless of whatever else is going on in your program, and regardless of whether the user is pressing keys.  I didn't think of mentioning IM 2 handlers before, but that might be the way to go.

On the other hand, a GetKey hook requires less memory to set up.
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Offline calc84maniac

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Re: A GetKey that doesn't wait?
« Reply #13 on: November 02, 2010, 11:08:46 pm »
If I remember correctly, if you press the ON key during _getKey a flag is set which causes exactly what you want. If you set this flag manually, it might just work.
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Offline Runer112

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Re: A GetKey that doesn't wait?
« Reply #14 on: November 02, 2010, 11:11:58 pm »
Yeah, I might not bother with hooks or anything and just set up the program to run in an interrupt with a GetKeyRetOff running outside the interrupt.
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