[REBOL] Re: How to refresh a text-list
From: reboler:programmer at: 27-Feb-2002 10:17
If I can make some assumptions here (always a dangerous thing), I think that 'fix-slider
is directed toward showing slightly modified text-list/data, as in appending or deleting
one value from /data. It changes what is shown in the text-list as little as possible.
When you are completely changing the data (as in from one directory listing to another)
then 'tell-list is the way to go, because it resets _everything_.
Using 'fix-slider when the data is completely changed leads to many problems, but is
good when the data is only slightly changed. Using 'tell-list when the data is only slightly
changed may lead to unnecessary work.
Here is a new function that addresses Phil's concerns, but I'll venture that it is still
no good for his purposes because it resets the display to the top of the list.
;*****
update-list: func [fce] [
;you must change fce/data yourself!
clear fce/picked
fce/sld/data: 0
fce/sn: 0
fce/line-list: none
fce/sld/redrag fce/lc / max 1 length? head fce/lines
show fce
]
view layout [
tl: text-list data read %./
button "Update" [;don't go beyond %/ !!!
append clear tl/data read change-dir %../ ;here is where I change the tl/data
;remove find tl/data tl/picked ;alternative, must pick something in the list.
update-list tl
]
]
;*****
