Unfortunately, yes, the keystrokes are still buffered and then applied when
the keyboard unlocks.
I dealt with something like this once but I'm not sure I ever got it 100%.
Here is what I think that I remember doing.
I displayed a record that had no input capable fields and kept the keyboard
locked. When it came time to unlock the keyboard, I think I used a DSM
function to "peek" to see if there was an "FKey" (Fkey, enter, page up, page
down, etc.) pending and if there was, I issued a read on the screen. That
clears the buffer up to that FKey. I repeated this until there were no more
"FKeys" pending. The "no input fields" should take care of the non-FKey
keystrokes.
I could be WAY off base with my memory on this because it was a LONG time
ago.
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Jon Paris
Sent: Monday, February 19, 2024 12:19 PM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Keyboard buffer
If you inhibit input will the keystrokes still be buffered? I have never had
to deal with this scenario so I don't have a direct answer.
As far as manipulating the buffers the only way I know how to do that is by
using the DSM APIs.
https://www.ibm.com/docs/en/i/7.5?topic=category-dynamic-screen-manager-apis
<
https://www.ibm.com/docs/en/i/7.5?topic=category-dynamic-screen-manager-api
s>
See the Buffer Manipulation section under Low-Level Services.
You may need to have DSM pop-up the "keep your hands to yourself" window so
that you have control over the associated buffer. I'm afraid I've done
little with DSM since it was first designed so I can't be sure you can do
this but ...
Jon P
On Feb 19, 2024, at 11:41 AM, Tim Adair <tadair@xxxxxxxxxxxxxxxx> wrote:
In the middle of an interactive RPGLE program, I need to be able to purge
the keyboard buffer. There is a point in the program where it calls a
(possibly rather lengthy) function. During this time, it pops up a "DO NOT
TOUCH THE KEYBOARD" window, which remains on the screen until the function
completes. In the event that the user presses a key (or keys) anyway, I
need to purge their keystroke(s) before the program continues. I'm hoping
that at least one of the following is possible:
1. Is there a function or API that I can call that will purge the keyboard
buffer?
2. Is there a way to directly read keystrokes from the buffer, so I can
loop through, read all the keystrokes, and just ignore them? (Something
similar to the BASIC INKEY$ function.
I'm open to other suggestions also.
Thank you in advance.
~TA~
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