--nextPart1662633.8N0rzfm0sF
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

On Tuesday 07 December 2004 22:19, Alexander Neundorf wrote:
> 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() ?

In fact the new function does nearly the same as the other backgroundColor(=
)=20
which was used before in paintCell.

The calculation for the different color is only triggered for the cells in =
the=20
sorted column (which are currently visible).

The dark() and light() calculations are rather inexpensive, as they only do=
 a=20
multiplication/division.
Also some mult/divs in hsv().
I did not see a performance loss.=20

> Could this be calculated once when the colors are set and the=20
> results stored so that they are only reused in paintCell() ?

Could be done, but I really don't think this is necessary here.

=2D-=20
Best regards/Sch=F6ne Gr=FC=DFe

Martin    ()  ascii ribbon campaign - against html mail=20
          /\                        - against microsoft attachments

       Some operating systems are called 'user friendly',
             Linux however is 'expert friendly'.

--nextPart1662633.8N0rzfm0sF
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQBBtiPfUeHBRvgua64RAvFMAJ9bIxNLBzpxaWgc5VWRkeHiNTQK3gCcCGMp
iVOqzKbvFnlScamAwuW+nyM=
=H2uw
-----END PGP SIGNATURE-----

--nextPart1662633.8N0rzfm0sF--