Jiri Barton wrote:
> Hello there,
>
> I have the following problem. Here's my template fragment; it defines a
> menu:
>
> <ul>
> <li>mushrooms</li>
> <li>cheese</li>
> <li>tomatoes</li>
> <li>onion</li>
> </ul>
>
> Now, I'd like to be able to highlight one item in some templates, and
> another item in other templates. Only the templates know what should be
> highlighted. To do that, I'd like to define a class="selected" for that
> item, so that the output will be for example:
>
> <ul>
> <li>mushrooms</li>
> <li>cheese</li>
> <li class="selected">tomatoes</li>
> <li>onion</li>
> </ul>
>
> Now, I'd like to write the menu only once and then use it the following
> way:
>
> {% declare menuselection tomatoes %}
> {% include "menu" %}
>
> The menu would have been defined as follows:
>
> <ul>
> <li {% ifequal menuselection "mushrooms" %} class="selected" {%
> endifequal %}>mushrooms</li>
> <li {% ifequal menuselection "tomatoes" %} class="selected" {%
> endifequal %}>tomatoes</li>
> <li {% ifequal menuselection "cheese" %} class="selected" {%
> endifequal %}>cheese</li>
> <li {% ifequal menuselection "onion" %} class="selected" {%
> endifequal %}>onion/li>
> </ul>
>
> A couple of questions: does anyone have a better idea how to do it?
> And, of course, the declare tag does not exists - is there a way of
> defining a variable from within a template?
>
> Thanks,
> Jiri
>
>
I would do it like this (python 2.4 decorator syntax, no i18n) :
in a templatetag module: (read the template docs)
-----------------------
from django.core import template
register = template.Library()
names = ['mushrooms','cheese','tomatoes','onion']
@inclusion_tag("myapp/menu")
def menu(selected):
return {
'items': [ { 'name':name,
'selected': name == selected } for name in ]
}
-----------------------
myapp/menu.html:
-----------------------
<ul>
{%for item in items%}
<li {%if item.selected%}class='selected'{%endif%} >
{%endfor%}
</ul>
----------------------
Obviously you could adjust this fairly easily, eg get the choices from
the database.
