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[REBOL] Re: Checkbox state is not changing - maybe Allen Kamp updates his View

From: geza67:freestart:hu at: 5-Sep-2001 22:49

Hello Anton,
>> >> view layout [ c: check [probe c/state]] >> > try c/data >> Quite inconsistent (... as so many aspects of VID ...) - toggles work with >> /state - but it works. > Not really. > I think state is whether gadget is "depressed"
That's the _main_ problem regarding /View, VID etc. We only _think_ about things instead of _knowing_ it surely - with a knowledge based on sound and behind-the-scenes _information_ (back to basics, i.e. /View's sparse documentation ... ;-) )
> or not. The check cannot be pushed down in > current implementation, therefore its state > should not change.
Then we should inform Allen Kamp that his information on Rebolforces' View FAQ is incorrect. I tried his checkbox-setting routines on /View and neither his methods is working: First: it shows the layout, but check apears not checked view layout [chk1: check with [state: true] Second: simply error ;-(
>> checkers: stylize [
[ true-check check [state: true] [ ] == []
>> >> view layout [styles checkers
[ chk1: true-check chk2: check] Unknown word or style: true-check Third: shows layout, no checked checkboxes ... checks: layout [chk1: check chk2: check] chk1/state: true view checks Fourth: ... the same ... view layout [chk1: check do [chk1/state: true]] Because Allen seems to be a positively zealous :-) REBOL personality I have only one explanation for this behavior of all his code snippets: In /View 1.x where x<>2 but some earlier release, checkbox's 'state property _worked_ as expected. Maybe this /View release is buggy in this respect. Thus the current one of the checkbox-checking solutions is with 'data : view layout [c: check do [c/data: true]]
> view layout [b: button [probe b/state]] > It's always true, because: > - first you press button, state becomes true (button looks depressed). > - you let go of button, action occurs. > - then state becomes false (button looks normal/ready again).
I think your code is rather instructive but: 'probe is fired AFTER you have released the button thus button is in "up"-position. In this respect 'state again "lies": it should have been always FALSE. Maybe it is trivial but as I played around I could simulate a toggle with a button and a special engage function like this: rebol[] view layout [ button feel [ engage: func [face action event] [ if action = 'up [ face/state: not face/state show face print [face/state] ] ] ] ]
> Perhaps in future, check will react like button and change
It would be more convenient if the widgets would behave more uniformly. -- Best regards, Geza mailto:[geza67--freestart--hu]