Re: Colorizing rows in SimpleList revisited

[John McDermott <jjm jkintl com>]

muppet, thanks.
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.

--john

muppet wrote:

> 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.

--
John McDermott
Writer, Educator, Consultant
jjm jkintl com          http://www.jkintl.com
V +1 505/377-6293 F +1 505/377-6313