Re: Colorizing rows in SimpleList revisited
- From: John McDermott <jjm jkintl com>
- To: muppet <scott asofyet org>
- Cc: gtk-perl-list gnome org
- Subject: Re: Colorizing rows in SimpleList revisited
- Date: Sat, 03 Jan 2004 09:08:29 -0700
The initial routines to connect the columns to the data only run once, so
I don't think the penalty for looking up the properties is too high. The
issue is that one could colorize, change weight, etc. with this function
so keeping a table might require a big table knowing lots of pango thingies.
it is possible to list the properties supported by an object, with
$object->list_properties (or $class->list_properties).
however, this will be a real runtime hit, so you probably don't want to
do it every time. two approaches would be:
1) use ref() to find the type of a cell renderer, and use that type to
look up a function that knows how to colorize that cell renderer type.
2) after creating the model, create a cache of cell renderer types for
each column, and query at this time whether they support the foreground
property. then use that cached information later.
either way, you figure out ahead of time how to colorize a row, and you
can either hand-code that knowledge or figure it out at runtime. since
different renderers may use different names for the same attribute, i'd
actually advocate method 1 here, which doesn't require listing
properties at all.
Writer, Educator, Consultant
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