here is a definitive (as opposed to infinitive) calculation that correctly
sets the positon of text vertically in a field
for testing purposes it is ready to be put into a slider
optionally make three graphics to get visual feedback, see below
watch out for line breaks
-------------------------------------------------------------------------------------------------------
-- optionally have visual feedback
-- make 3 horizontal line graphics, "gTop", "gBot", "gCenter"
-- place them near the field
on scrollbarDrag pValue -- tested with values 9 to 36
lock screen
put the long id of fld "fTest" into myFld -- change to name of your field
set the textSize of myFld to pValue
CenterTextVertically myFld
if there is a grc "gTop" AND there is a grc "gBot" AND there is a grc
"gCenter" then
getFeedBack myFld
end if
end scrollbarDrag
on CenterTextVertically myFld
put the effective textHeight of myFld into tTextHeight
put item 2 of the loc of myFld into tfieldY
put the formattedRect of line 1 to - 1 of myFld into tFormatRect
put item 2 of tFormatRect into tCurrFormatTop
put tfieldY - tCurrFormatTop into tCenterField_To_TopTextDiff
put the number of lines of the text of myFld into tNoOfLines
put (((tNoOfLInes div 2)) * tTextHeight) + (tNoOfLInes mod 2) *
(tTextHeight div 2) into tOffset
set the topMargin of myFld to the topMargin of myFld +
tCenterField_To_TopTextDiff - tOffset
end CenterTextVertically
on getFeedBack myFld
put the formattedRect of char 1 to - 1 of myFld into tFormatRect
put item 2 of the loc of myFld into tfieldY
set the top of grc "gTop" to item 2 of tFormatRect - 1
set the top of grc "gBot" to item 4 of tFormatRect - 1
set the top of grc "gCenter" to tFieldY - 1
end getFeedBack
-------------------------------------------------------------------------------------------------------
Did the code "you came across" not do what you wanted?
Kind regards
Bernd
Terence Heaford wrote
> Is there a definitive calculation that correctly sets the position of text
> vertically in a field?
>
> I am using LC 6.7.
>
> I have come across a few ideas like the one below that all appear to use
> an arbitrary offset to the margins, is there a method to calculate this
> accurately?
>
> put the effective textSize of fld id tID into tTextSize
> -- put round (((tTextSize - 22) * 1/3)) into tOffset
> put round (((tTextSize - 24) * 1/3)) into tOffset
> put the formattedheight of char 1 to - 1 of fld id tID into
> tFormattedHeight
> put round((the height of fld id tID - tFormattedHeight) / 2) into
> tVerticalMargins
> put tVerticalMargins - tOffset into tTopMargin
> put tVerticalMargins + tOffset into tBottomMargin
> set the margins of fld id tID to 8,tTopMargin,8,tBottomMargin
>
> All the best
> Terry
--
View this message in context:
http://runtime-revolution.278305.n4.nabble.com/Vertically-aligning-text-in-a-field-tp4686824p4686954.html
Sent from the Revolution - User mailing list archive at Nabble.com.
_______________________________________________
use-livecode mailing list
use-livecode@lists.runrev.com
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-livecode
