Re: [htmltmpl] TMPL_IF and TMPL_ELSE - how do I use this?

[Joel <htm...@jo...>]

Hi Lori,

In your loop where you are pushing onto @loop_data, you'd want to add an
additional variable to your hashref that will indicate whether or not is
drillable. So inside your loop, you might do something like this:


for (some_loop_condition) {
    if (row_is_drillable) {
        push @loop_data, {id =3D> $this,
                          rowname =3D> $that,
                          drillable =3D> 1}
    } else {
        push @loop_data, {id =3D> $this,
                          rowname =3D> $that,
                          drillable =3D> 0}  =20
    }
}
$tmpl->param(LOOP_DATA =3D> \@loop_data);


Then inside your template:
<TMPL_LOOP NAME=3DLOOP_DATA>
    ID:         <TMPL_VAR NAME=3DID><br>
    Name:       <TMPL_VAR NAME=3DROWNAME><br>
    Drillable?: <TMPL_IF NAME=3DDRILLABLE>Yes<TMPL_ELSE>No</TMPL_IF>
</TMPL_LOOP>

Basically, you can use TMPL_IF on any variable in your loop. Although, if a
drillable row requires a URL or some other bit of information, you can get =
away
without an explicit drillable variable and use the presence or absence of t=
he
URL to indicate if the row is drillable.

Remember what true and false are in perl and that will help you. False is 0
(the numeric value), "0" (a string containing the number 0), undef (undefin=
ed)
or a empty string ('' or ""). Anything else is true. And that's how
HTML::Tempalte works, as well, when dealing with TMPL_IF.

Clear as mud, right? :) Hope this helps.

Good luck!
--Joel

>I've read the documentation sections on TMPL_IF and TMPL_ELSE.  The part
>where I'm getting stuck is figuring out how to set up that "BOOL" value.  =
I
>know if "BOOL" is true, then the section in TMPL_IF is run; if it's false,
>the section in TMPL_ELSE is run.  This sounds like what I want to do (I
>think...).
>=20
>I have my results generated and the web page looks nice.  However, there a=
re
>some rows that need to have a different bit of HTML in it (some rows/cells
>are to be "drillable" and some are not).  Unfortunately, it's not just the
>"last" or "first", etc.; the rows are interspersed in no particular order,
>some are contiguous, some are stand-alone.
>=20
>This is where I get stuck.  I can tell where I am in Perl when I'm pushing
>the hash references to the @loop_data (which is subsequently pushed to the
>template for output), so I can set a variable to something at that time. =
=20
>=20
>How do I set up a variable that the TMPL_IF and TMPL_ELSE can use to
>determine which section of the HTML loop to process?
>=20
>I hope this made sense.  When you're new, sometimes it's hard to know even
>how to ask a question!  :-)
>=20
>Thanks!
>=20
>Lori
>
>
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