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Pasteurized Arrowkeys
Posted: Mon Jun 10, 2019 8:51 am
by richmond62
I don't really want end-users from getting one response when they press on a key (i.e. no automatic repeats).
So, was a bit surprised why this:
Code: Select all
on arrowKey AK
put item 1 of the loc of grc "rp" into LR
put item 2 of the loc of grc "rp" into UD
switch AK
case "left"
subtract 10 from LR
move grc "rp" to LR,UD
pass arrowKey
break
case "up"
subtract 10 from UD
move grc "rp" to LR,UD
pass arrowKey
break
case "right"
add 10 to LR
move grc "rp" to LR,UD
pass arrowKey
break
case "down"
add 10 to UD
move grc "rp" to LR,UD
pass arrowKey
break
end switch
end arrowKey
Didn't stop that.
Possibly I have misunderstood the role of 'pass'.
Re: Pasteurized Arrowkeys
Posted: Mon Jun 10, 2019 9:01 am
by richmond62
And replacing 'pass arrowKey' with:
throws a 'bluey'.
is similarly useless.
Re: Pasteurized Arrowkeys
Posted: Mon Jun 10, 2019 9:09 am
by richmond62
What I am looking for would be a bit like this (pseudoCode):
if arrowKeyStillDown then
end arrowKey
end if
Re: Pasteurized Arrowkeys
Posted: Mon Jun 10, 2019 10:21 am
by jmburnod
Hi Richmond,
What about this cd script ?
Code: Select all
local sStartTime
on opencard
initStartime
end opencard
on initStartime
put the milliseconds into sStartTime
end initStartime
on arrowkey pDir
if the milliseconds < (sStartTime + 500) then
beep
exit arrowkey
else
put pDir & sStartTime into fld "fSpy"-- you have to create one fld "fSpy"
put the milliseconds into sStartTime
end if
end arrowkey
Best
Jean-Marc
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 10:06 am
by richmond62
This didn't stop key repeats:
Code: Select all
on arrowKey AK
put item 1 of the loc of img "bull" into LR
put item 2 of the loc of img "bull" into UD
if AK = "up" then
subtract 8 from UD
move img "bull" to LR, UD
if intersect(img"bull",img"maze",5) then
move img "bull" to 162,676
end if
exit to top
end if
end arrowKey
This is slightly pathetic for the very, very simple
reason that I can do this on my BBC Model B from 1981:
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- Screen shot 2019-06-14 at 12.05.44 PM.png (7.63 KiB) Viewed 6958 times
Some wag made a rude remark about
GOTO and
GOSUB when they were introduced in
BASIC
(much the same way as "clever" programmers are rude about LiveCode nowadays) . . .
Now, as LiveCode
DOES have line numbers (go and look!), why is there no
GOTO equivalent to
escape from a script?
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 10:15 am
by Klaus
richmond62 wrote: ↑Fri Jun 14, 2019 10:06 am
Now, as LiveCode
DOES have line numbers (go and look!), why is there no
GOTO equivalent to escape from a script?
This in just
a feature of the Script Editor for our convenience.
The scripts do not have line numbers, at least the engine does not count them or support this.
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 10:43 am
by richmond62
The scripts do not have line numbers, at least the engine does not count them or support this.
In some ways that's a pity.
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 12:30 pm
by sphere
Oh man, i can remember the days (& nights) when i had my first MSX, typing over those listings in MSX-magazines, learning myself to type. MicroSoft Basic...and then euh where is the R, and euh where is the U and then after 2 minutes ah i found the N. Just great!
Then i had the great idea to steer my 4 color plotter with my joystick (which still worked after many hours Hyper Sports and such) andwith Fire i could change the color. It was useless further but it worked.
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 12:56 pm
by richmond62
Oh man, i can remember the days
Come Monday morning, and a good half dozen 10 year olds will be sitting down in front of my
BBC Micro computers for the simple reason that foetuses when they incubate in their mother's
wombs RECAPITULATE . . .
-
- beebem.png (23.72 KiB) Viewed 6920 times
-
Err . . . the theory of foetal recapitulation has been debunked . . .
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 2:30 pm
by Mikey
richmond62 wrote: ↑Fri Jun 14, 2019 10:43 am
The scripts do not have line numbers, at least the engine does not count them or support this.
In some ways that's a pity.
Structured languages that lack GOTO definitely make some things harder, but line numbers are not a good thing. Line labels seem to be a reasonable tool (even if they can make code harder to read in some cases).
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 2:33 pm
by richmond62
Line labels
And how can one (can one?) implement those in LiveCode?
AND, HOW, more to the point . . .
. . . can one 'escape' a script?
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 2:37 pm
by Mikey
Why ctrl-alt-delete, of course
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 4:12 pm
by richmond62
ctrl-alt-delete
is it possible to implement that programmatically?
Re: Pasteurized Arrowkeys
Posted: Fri Jun 14, 2019 4:42 pm
by jacque
Dar posted a workable solution to the mailing list. Generally if you need to exit a script, changing the structure will allow it.
If you really want to do it in a "goto" way, you can experiment with "exit to top" or "return".