From mboxrd@z Thu Jan  1 00:00:00 1970
From: Carsten Dominik <carsten.dominik@gmail.com>
Subject: Re: changing face (color) on tags-todo agenda headlines
Date: Wed, 9 Dec 2009 11:08:48 +0100
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To: "Sullivan, Gregory (US SSA)" <gregory.sullivan@baesystems.com>
Cc: "emacs-orgmode@gnu.org" <emacs-orgmode@gnu.org>

Hi Sullivan,

On Dec 8, 2009, at 5:46 PM, Sullivan, Gregory (US SSA) wrote:

> I'd like to process agenda headlines and apply face (color) to ones  
> with given tags.
>
> It seems like I should add a function to org-finalize-agenda-hook.   
> When that hook is invoked, how do I iterate over agenda headlines?
>
> I thought I could use org-map-entries, on the current buffer, as  
> follows:
>
> (add-hook 'org-finalize-agenda-hook
> 	  (lambda ()
> 	     (message "starting agenda-hook")
> 	     (org-map-entries
> 	      '(message "hi")
> 	      "+highlight" nil)))
>
> But I never get "hi" despite there being agenda items with the  
> "highlight" tag.

mapping entries only works in org-mode buffers, not in the agenda.

You need to do a regexp search, like this (untested):


(add-hook 'org-finalize-agenda-hook
	  (lambda ()
	     (goto-char (point-min))
	     (while (re-search-forward ":MYSPECIALTAG:" nil t)
                 (add-text-properties (point-at-bol) (point-at-eol)
                       '(face my-special-face)))))

or you can use forward-line to iterate over lines and then look at the  
text properties
to find the tags you are looking for.

Also, I'd recommend to put a named function into the hook - makes it
easier to change it during testing without putting a large
number of bad lambdas into that hook.

Hope this helps

- Carsten