[Insight-users] Re: Qt + ITK integration

[Luis Ibanez]

Hi Venkat,


There is no real mistery for integrating ITK and QT.

No specific libraries are needed for this purpose.
All the necessary code is what you already found in

    InsightApplications/Auxiliary/QtImageViewer

You will find another example in

    InsightApplications/QtITK

that illustrates how to pass ITK events as Qt signal,
and how to use ITK Command/Observers as Qt slots.


----

The incompatibility between the libraries

         qaxserver.lib
         qt-mt331.lib

is not to be found in the ITK+Qt integration code.

It is very likely that mixing these two libraries
in *any* Qt pure application will lead you to similar
problems. (that is, if you remove all the ITK code,
the problem will still be there.)


I assume that you are finding duplicate symbols
at link time when you add qaxserver.lib.

Is that what is happenning  ?


(your attachement with linker errors didn't get
  to my mailbox...)


BTW are you making sure that you build your
application using the same compilation mode
everywhere  ?  (that is: Debug/Release...)


--


The reason why the QT libraries version have
been changing on CMake is the natural difficulty
for dealing with Qt multi-licenses.

You could easily overcome this problem by copying
the file


     CMake/Modules/FindQT.cmake


renaming it and modifying its content in order to
find the libraries that you need to use.



Please let us know what you find.



   Regards,


      Luis



----------------
Venkata wrote:

> Hello Luis,
> 
>  
> 
> We took Qtslicer application developed by ITK as an example for Qt + ITK 
> integration. Based on this application we developed our own application 
> that integrates Qt and ITK. As we are progressing in our application, we 
> are in need of many Qt libraries for our application functionality. At 
> one stage we are facing a clash between two Qt libraries (qaxserver.lib 
> and qt-mt331.lib).  As we observed qt-mt331.lib is used for Qt + ITK 
> integration and qaxserver.lib for the feature we want to implement to 
> make our application web-enabled. I wanted to know is qt-mt331.lib that 
> integrates Qt + ITK, because if I remove that library I am getting lot 
> of errors. Therefore I thought it is the main library that integrates Qt 
> and ITK.
> 
>  
> 
>  Do different versions of CMAKE use different Qt libraries for Qt + ITK 
> integration? When I observed CMake1.8 patch 1 it uses QT_QT_LIBRARY as 
> qt-mtedu322.lib and CMake1.8 patch 3 uses qt-mt331.lib instead of 
> qt-mtedu322.lib. Similarly I want to know is there any other library I 
> need to use for the integration and resolve the clash with 
> qaxserver.lib. For your reference I am attaching the LINKER errors.
> 
>  
> 
> Your response in this regard will be highly appreciated.
> 
>  
> 
> Thanks
> 
> -Venkat
> 
>  
> 
> * *
> 
>  
>