On 2019-06-11 02:44, Alex Tweedly via use-livecode wrote:
on mouseup
local tName, t1, t2
put the long name of fld "F" into tName
put tName & ",12,13" into t1
put "t1" && t1 &CR after msg
put item 1 of t1 into t2
set the vis of t2 to TRUE
put "t2 was OK" &CR after msg
set the vis of (item 1 of t1) to TRUE
put "using parens OK" &CR after msg
set the vis of item 1 of t1 to TRUE -- this line fails !!
put "here" &CR after msg
end mouseup
that line fails, with the error message
button "Button": execution error at line 14 (Chunk: error in object
expression) near "field "F" of group id 1005 of group id 1007 of card
id 1002 of stack "/Users/alextweedly/Dropbox
(Personal)/Apps/objectchunk.livecode"
I just cant see why that doesn't work :-)
If I use parentheses, or if copy the first item over to a different
variable), then it is all OK. But doing it directly (AFAICT) should
work, and doesn't. What am I misunderstanding ?
The engine assumes that if you are manipulating a property of a string
chunk, then you want to manipulate the part of the target object the
string chunk describes, and not dereference the chunk as an object to
set the property on.
i.e. in the case above the failing line is attempting to set the visible
property of the first item of the content of control referenced with
chunk "<long name>,12,13" -- and the latter is not a valid control
chunk.
Warmest Regards,
Mark
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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