[Paraview] NULL qApp in Paraview Plugin

[Thomas D. Uram]

otool (I'm on OSX currently) reports the Qt version as 4.2.2:

        @executable_path/../Frameworks/QtGui.framework/Versions/4/QtGui 
(compatibility version 4.2.0, current version 4.2.2)

which is what I used to build Paraview and my plugin.  I built the 
Paraview 3.1 source, built my plugin against it, and am subsequently 
trying to load the plugin with the released 3.1 executable.

No luck yet.  I'll report back if I find my way.

Thanks,
Tom


On 1/17/08 1:03 PM, clinton at elemtech.com wrote:
> Did you build your plugin against the same Qt version and same ParaView code 
> that the ParaView releases were made from?
>
> Its possible to have a NULL qApp if a different version of Qt is used when 
> building the plugin.
>
> I'd probably check in the debugger (even in release mode) what libraries are 
> actually being used, after your plugin loads.
>
> Clint
>
> On Thursday 17 January 2008 11:04:14 am Thomas D. Uram wrote:
>   
>> I've written a plugin for Paraview, following the directions at
>>
>>     http://www.vtk.org/Wiki/Plugin_HowTo
>>
>> and it works fine with the Paraview executable I've built.  I'd like for
>> it to also work with the official Paraview releases, but in that case
>> Paraview crashes trying to load the plugin.
>>
>> That's because the plugin code makes a call against qApp (as does the
>> Paraview plugin example), but qApp is NULL.  So my questions are:
>>
>> - Is there a related build dependency that I need to consider?  (I've
>> already ensured that my plugin uses CMAKE_BUILD_TYPE=='release')
>>
>> - Should I be able to successfully build plugins for loading by the
>> release code?  (I expect that's the long term plan, but wonder if it is
>> not yet possible.)
>>
>>
>> Any help would be appreciated.
>>
>> Thanks,
>> Tom
>>
>>
>>
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>> ParaView at paraview.org
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>>     
>
>
>
>   
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