From kde-core-devel  Tue Dec 07 21:19:21 2004
From: Alexander Neundorf <neundorf () kde ! org>
Date: Tue, 07 Dec 2004 21:19:21 +0000
To: kde-core-devel
Subject: Re: [patch] shade sorted column in KListView
Message-Id: <200412072219.21005.neundorf () kde ! org>
X-MARC-Message: https://marc.info/?l=kde-core-devel&m=110245437601066

On Tuesday 07 December 2004 22:01, Martin Koller wrote:
...
> If you invert back/alternating, it will give different results, which would
> make a problem when the background color is white (lighter than white is
> not possible).
> I think I found a good solution (it's similar to what the
> calculateAlternateBackgroundColor() method in kglobalsettings does).
>
> See attached patch.
>
> If there are no objections to the rest of the code, I would commit this
> tomorrow.

Am I right that backGroundColor() is called for every cell of the listview ?
How about the performance impact ?
It adds at one function call to each paintCell() everywhere in KDE where a 
KListView is used. How expensive are the color conversions ? hsv(), dark(), 
light() ? Could this be calculated once when the colors are set and the 
results stored so that they are only reused in paintCell() ?

Bye
Alex
-- 
Work: alexander.neundorf@jenoptik.com - http://www.jenoptik-los.de
Home: neundorf@kde.org                - http://www.kde.org
      alex@neundorf.net               - http://www.neundorf.net