On Sun, Mar 02, 2014 at 05:38:20PM -0500, me wrote:
> Please help point me in the right direction once again? What I'm
> attempting to achieve is something like:
>
> ( "progress"
> ( '("progress-bar progress-bar-success"
>(role . "progressbar")
>(aria-valuenow . "-79")
>(aria-valuemin . "-100")
>(aria-valuemax . "100")
>(style . "width: 79%") )
> ( "sr-only" "79% Nominal") ) )
>
>
> What I have is:
>
> (de make-progress-bar (bar-type width)
>( "progress"
> ( '(`(,pack "progress-bar progess-bar-" ,bar-type)
>(role . "progressbar")
>(aria-valuenow . `(,pack ,width))
>(aria-valuemin . "-100")
>(aria-valuemax . "100")
>(style . `(,pack "width: " ,width "%")) )
> ( "sr-only" `(,pack ,width "% Nominal")) ) ) )
>
>
> What is the idiomatic way to manipulate text such that I can dynamically
> generate different types of progress bars? The idea being that I could use
> different color coded static progress bars as a simple form of charting
> data.
The problem with the solution above is that the backquote has a meaning
in PicoLisp different from that in CL. It is a read macro, not a
pattern-filler at runtime. Same goes for the comma.
Passing a list dynamically at runtimes means that it must be built at
runtime. This should work:
(de make-progress-bar (Bar-type Width)
( "progress"
(
(list
(pack "progress-bar progress-bar-" Bar-type)
'(role . "progressbar")
(cons 'aria-valuenow Width)
'(aria-valuemin . "-100")
'(aria-valuemax . "100")
(cons 'style (pack "width: " Width "%")) )
( "sr-only" Width "% Nominal") ) ) )
(make-progress-bar "success" 79)
You might also take a look at 'fill' (which is a bit similar to the CL
backquote function) to build the list, but that's a little more
involved in this case:
(de make-progress-bar (Bar-type @Width)
(let
(@B (pack "progress-bar progress-bar-" Bar-type)
@W (pack "width: " @Width "%") )
( "progress"
(
(fill
'(@B
(role . "progressbar")
(aria-valuenow . @Width)
(aria-valuemin . "-100")
(aria-valuemax . "100")
(style . @W) ) )
( "sr-only" @Width "% Nominal") ) ) ) )
(make-progress-bar "success" 79)
The effect is the same in both cases.
♪♫ Alex
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