[vtk-developers] [InfoVis] VTK_USE_QT

[Utkarsh Ayachit]

VTK_HAS_QT is just for convenience. It QT dependent files are included
before Qt is found, cmake tends to spit out too many errors that hide
the fact that what's missing is merely Qt. So VTK_HAS_QT. I am not too
keen on it either, and I don't have any hesitation removing it. We can
simply use VTK_USE_QT and it should work fine.

VTK_USE_QT cannot merely replace VTK_USE_QVTK , since VTK_USE_QVTK
includes compilation of QVTKWidget which needs Rendering which is
optional. That's the reason for creation of this new VTK_USE_QT as
well.

On Fri, Apr 10, 2009 at 4:26 PM, Timothy M. Shead <tshead at sandia.gov> wrote:
> Utkarsh Ayachit wrote:
>>
>> As per the request, I've committed changes to VTK to add a new top
>> level option VTK_USE_QT. When this option is set and Qt is found,
>> VTK_HAS_QT is set. The internal cmake files can then use the value of
>> this cache variable to add files that depend on Qt.
>>
>
> Why the distinction between USE_QT and HAS_QT?  We don't seem to do this for
> other optional libraries (such as boost) ...
>
> Also, it seems as if USE_QT should replace USE_QVTK, and we might look at
> whether GUISUPPORT still makes sense ...
>
> Cheers,
> Tim
>
>
> --
> Timothy M. Shead
> Data Analysis & Visualization (1424)
> Sandia National Laboratories
> 505-284-0139
>
>