[Insight-users] question regarding QT - ITK connection

[Luis Ibanez]

Hi Sergio,


As the error message states:


The QtSlotAdaptor classs has no definition available for
a SetCallbackFunction() where the function takes "unsigned int"
 as an argument.


The current options are:

                 void, int, and double

See lines 50-57    in    itkQtAdaptor.h:

class QtSlotAdaptor : public QtTranslator
{
  typedef  void (T::*TMemberFunctionVoidPointer)();
  typedef  void (T::*TMemberFunctionIntPointer)(int);
  typedef  void (T::*TMemberFunctionDoublePointer)(double);


You need to insert

  typedef  void (T::*TMemberFunctionUnsignedIntPointer)(unsigned int);

in line 55,

and then insert


  /** Specify the callback function. */
  void SetCallbackFunction(T* object,
                           TMemberFunctionUnsignedIntPointer memberFunction)
    {
      m_This = object;
      m_MemberFunctionUnsignedInt = memberFunction;
    }

in line 72,

and then insert

  TMemberFunctionUnsignedIntPointer     m_MemberFunctionUnsignedInt;

in lines 121.


NOTE, all the lines number are given *before* insertions.



     Regards,


          Luis


------------------------------------------------------------------------------
On Mon, Jul 13, 2009 at 8:47 PM, Sergio Aguirre <sergio.aguirre at gmail.com>wrote:

> Hello everyone.
>
> I have been slowly getting the hang of QT and ITK, After a few days I
> successfully was able to compile and run the QTITK example located at
> http://public.kitware.com/cgi-bin/viewcvs.cgi/QtITK/?root=InsightApplications
>
> The small app loads and image and shows colors depending of the progress it
> takes when going through a filter. Also it displays a progress bar. I am
> using 'curvatureflowimagefilter' to test the connections.
>
> I now would like to use a slider to set the SetNumberofIterations int
> variable of the filter from the GUI. Unfortunately I get the message below.
>
> I believe I am close as I was able to start the filter using the QTSlider -
> sliderMoved function to trigger the file reading and filtering by calling
> the Update function.
>
> Any suggestions would be handy. Full code is attached and code snippet is
> below.
>
> Thank you
>
> Sergio
>
>
>   QWidget qb;
>   qb.resize(620,200);
>
>   const int buttonHeight =  30;
>   const int buttonWidth  = 100;
>   const int buttonSpace  = 100;
>
>   int horizontalPosition =  60;
>
>   QPushButton  bb( "Start", &qb );
>   bb.setGeometry( horizontalPosition, 20, buttonWidth, buttonHeight );
>
>   horizontalPosition += buttonWidth + buttonSpace;
>
>   QtLightIndicator  cc( &qb, "State" );
>   cc.setGeometry( horizontalPosition, 20, buttonWidth, buttonHeight );
>   cc.Modified();
>
>   horizontalPosition += buttonWidth + buttonSpace;
>
>   QPushButton  qt( "Quit", &qb );
>   qt.setGeometry( horizontalPosition, 20, buttonWidth, buttonHeight );
>
>   QtProgressBar qs( &qb, "Progress");
>   qs.setGeometry( 10, 60, 600, 30 );
>
>   QSlider sl(Qt::Horizontal, &qb);
>   sl.setRange(1, 100);
>   sl.setValue(10);
>   sl.setGeometry(100, 110, 400, 60);
>
>   // Connect the progress bar to the ITK processObject
>   qs.Observe( filter.GetPointer() );
>   qs.Observe( reader.GetPointer() );
>
>
>   typedef QtSlotAdaptor<FilterType> SlotAdaptorType;
>   SlotAdaptorType slotAdaptor1;
>   // Connect the adaptor to a method of the ITK filter
>   slotAdaptor1.SetCallbackFunction( filter, & FilterType::Update );
>   // Connect the adaptor's Slot to the Qt Widget Signal
>   QObject::connect( &bb, SIGNAL(clicked()), &slotAdaptor1, SLOT(Slot()) );
>
>   typedef QtSlotAdaptor<FilterType> SlotAdaptorType;
>   SlotAdaptorType slotAdaptor2;
>   // Connect the adaptor to a method of the ITK filter
>   slotAdaptor2.SetCallbackFunction( filter, &
> FilterType::SetNumberOfIterations );
>   // Connect the adaptor's Slot to the Qt Widget Signal
>   QObject::connect( &sl, SIGNAL(sliderMoved(int)), &slotAdaptor2,
> SLOT(Slot()) );
>
>
> ********************* COMPILE OUTPUT
> *********************************************
>
> linux-vk5n:/home/echopixel/Desktop/engine/code/epx01 # make
> [ 25%] Building CXX object CMakeFiles/epx01.dir/epx.cxx.o
> /home/echopixel/Desktop/engine/code/epx01/src/epx.cxx: In function ‘int
> main(int, char**)’:
> /home/echopixel/Desktop/engine/code/epx01/src/epx.cxx:81: warning:
> deprecated conversion from string constant to ‘char*’
> /home/echopixel/Desktop/engine/code/epx01/src/epx.cxx:90: warning:
> deprecated conversion from string constant to ‘char*’
> /home/echopixel/Desktop/engine/code/epx01/src/epx.cxx:113: error: no
> matching function forcall to
> ‘QtSlotAdaptor<itk::CurvatureFlowImageFilter<itk::Image<float, 2u>,
> itk::Image<float, 2u> >
> >::SetCallbackFunction(itk::SmartPointer<itk::CurvatureFlowImageFilter<itk::Image<float,
> 2u>, itk::Image<float, 2u> > >&, void
> (itk::FiniteDifferenceImageFilter<itk::Image<float, 2u>, itk::Image<float,
> 2u> >::*)(unsigned int))’
> /home/echopixel/Desktop/engine/code/epx01/src/itkQtAdaptor.h:67: note:
> candidates are: void QtSlotAdaptor<T>::SetCallbackFunction(T*, void
> (T::*)()) [with T = itk::CurvatureFlowImageFilter<itk::Image<float, 2u>,
> itk::Image<float, 2u> >]
> /home/echopixel/Desktop/engine/code/epx01/src/itkQtAdaptor.h:76:
> note:                 void QtSlotAdaptor<T>::SetCallbackFunction(T*, void
> (T::*)(int)) [with T = itk::CurvatureFlowImageFilter<itk::Image<float, 2u>,
> itk::Image<float, 2u> >]
> /home/echopixel/Desktop/engine/code/epx01/src/itkQtAdaptor.h:85:
> note:                 void QtSlotAdaptor<T>::SetCallbackFunction(T*, void
> (T::*)(double)) [with T = itk::CurvatureFlowImageFilter<itk::Image<float,
> 2u>, itk::Image<float, 2u> >]
> make[2]: *** [CMakeFiles/epx01.dir/epx.cxx.o] Error 1
> make[1]: *** [CMakeFiles/epx01.dir/all] Error 2
> make: *** [all] Error 2
>
>
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