[Paraview] Qt 4.2.3 Required for PV 3.1.0 Head

[Moreland, Kenneth]

Mike,

As you guessed, that check was put in to discourage use of any but the
officially supported version of Qt.  In the early days of ParaView, back
when Tcl/Tk was used for the GUI (and more), there were a lot of
problems with users building with different versions of Tcl.  Eventually
the problem was solved with embedding a version of Tcl/Tk with the
source of ParaView.  Now that we have moved to Qt, licensing and build
issues prevent us from doing that.  Instead we need to make it very
clear to builders which version of Qt ParaView currently supports.

The problem is not so much reporting bugs that are tied to a different
version of Qt.  The problem is not knowing the bug is tied to a
different version of Qt.  If you build with a different version of Qt
and run into a problem there is no practical way to determine that
changes in the Qt library caused problems or not.

So changing the CMake files to allow you to build with Qt 4.3 is easy
enough.  You just need to delete a few lines.  We expect users who are
savvy enough to do that.  But at the same time, the process should come
as a warning that you have a "hacked" version of ParaView that may
experience unforeseen problems.

-Ken

> -----Original Message-----
> From: paraview-bounces+kmorel=sandia.gov at paraview.org
[mailto:paraview-
> bounces+kmorel=sandia.gov at paraview.org] On Behalf Of Mike Jackson
> Sent: Thursday, September 06, 2007 12:50 PM
> To: ParaView
> Subject: [Paraview] Qt 4.2.3 Required for PV 3.1.0 Head
> 
> I just downloaded ParaView from CVS Head ran across the latest
> stumbling block. It seems that Qt 4.2.3 is now Required as the ONLY
> version of Qt. Before I was using 4.3.0 without any problems because
> I was using some of the newer features of Qt 4.3 in some other
> projects. Now I have to have BOTH Qt versions built on my computer.
>    I can see both sides to this. On the one hand as paraview
> developers you only want to _support_ a specific version of Qt so the
> number of Bugs is manageable. But could the definition of _support_
> be so that I can still compile against Qt 4.3 but if I submit a bug
> against Qt 4.3 you can ignore it or place it at low priority? Was
> there something added into ParaView 3 that just does not work with Qt
> 4.3?
> 
> Just another thing I had to do before trying to solve another bug..
> 
> Cheers
> 
> --
> Mike Jackson
> imikejackson & gmail * com
> 
> 
> 
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