[mythtv] [ANNOUNCE] merging Qt4 branch to trunk

[Paul Bender]

Doug Goldstein wrote:
> On Mon, Mar 17, 2008 at 1:52 PM, Paul Bender <pebender at san.rr.com 
> <mailto:pebender at san.rr.com>> wrote:
> 
>     Janne Grunau wrote:
>      > This email is being sent to serve as a warning to users that we will
>      > start porting MythTV to Qt4 in trunk monday or tuesday next week
>     (March
>      > 17th or 18th, 2008).
>      >
>      > Due to the low-level of the changes it is not feasible to do the
>     port in
>      > a branch. This and the huge amount of changes will most likely cause
>      > some instabilities in the coming weeks.
>      >
>      > It is recommended to switch productive systems to release-0-21-fixes.
>      > Not updating for some time would work too but it will miss bugfixes
>      > committed to the release branch.
>      >
>      > The required Qt version will be Qt 4.3.
>      >
>      > Janne
> 
>     Is there a compelling reason for requiring Qt 4.3 rather than Qt 4.2?
> 
>     I ask this because RHEL 5.1 and therefore CentOS 5.1 come with Qt 4.2.1.
>     Many people (including myself) use RHEL/CentOS for their backend so that
>     they can stay off the OS upgrade treadmill. As of now, the next minor
>     RHEL (5.2) release does not ugrade Qt. Therefore, Qt 4.3 would require
>     custom RPMs. It would be unfortunate to require custom Qt RPMs in order
>     to upgrade MythTV.
> 
> 
> The compelling reason is much of the widget manipulation and 
> customization that I see MythTV requiring isn't available until Qt 4.3. 
> Text layouts, button views and theming. etc.
> 
> I have a couple of issues of Qt Quarterly on my desk discussing the 
> *new* amazing features of Qt 4.3 with regard to control over widgets and 
> such. It of course makes a casual reference that this stuff was 
> available back in Qt 3 days so it's not really new... While it's been 
> some time since I've plowed through MythTV code. Some of the techniques 
> discussed are items I know MythTV relied on from the Qt 3 series.

Thank you for the explanation. That is the kind of thing I was trying to 
find out.