[vtk-developers] Problems using vtkCommand::ProcessEvent with Qt 3 by using vtkEventQtSlotConnect - Sorry by last ugly subject

[Wagner Sales]

Thanks Clint,

Just for future search purposes, works fine.

Wagner Sales

2006/5/4, Clinton Stimpson <clinton at elemtech.com>:
>
>
> Here's probably enough for you to work from:
>
> ========================
>   this->EventQtSlot = vtkEventQtSlotConnect::New();
>   ....
>   vtkPExodusReader *exodusReader = vtkPExodusReader::New();
>
>   this->EventQtSlot->Connect(exodusReader,vtkCommand::ProgressEvent,
>     this,SLOT(ExodusReaderProgress(vtkObject *, unsigned long,
> void*,void*)));
>
>   exodusReader->  do some stuff and read the file
>
>   this->EventQtSlot->Disconnect(exodusReader,vtkCommand::ProgressEvent,
>     this,SLOT(ExodusReaderProgress(vtkObject *, unsigned long,
> void*,void*)));
>
> =============================
>
> void PMainWindow::ExodusReaderProgress(vtkObject *, unsigned long,
> void*, void* progress)
> {
>     double* amount=(double*)progress;
>     int step=(int)*amount*100;
>     this->ProgressWidget->SetSubProgress(step);
> }
>
> Clint
>
>
>
> Wagner Sales wrote:
> > Hi VTK Developers,
> >
> > I was posted this message at vtk-users, but unfortunatelly, no answer
> was sended back.
> > Then, i'm posting here and put more two considerations:
> > 1 - I suggest to include an example about this topic in future vtk
> releases ( Examples/GUI/Qt/Events ).
> >
> >
> > 2 - I was tried just with the vtkDICOMImageReader, not with others
> filters. In ITK this problem only occurs with readers, but I was gived the
> desired behaviour with others filters (e.g segmentation filters). May be
> in VTK are the same?
> >
> >
> >
> > Since I'm using Qt, i'm familiar with the slot/connection facilty, but
> not so familiar with the add observer pattern, just by I was readed in vtk
> books.
> >
> > Thks a lot by any suggestions, example...
> >
> >
> > Wagner sales
> >
> >
> > --- POSTED MESSAGE:
> > Hi all,
> >
> > I'm trying to use the progress event from a vtkDICOMImageReader to
> > change the status ( percent ) on a QProgressBar widget.
> > I was readed the Examples/GUI/Qt, and based on this, StartEvent and
> >
> >
> > EndEvent are working fine to me by using the following code:
> >
> >    // my connections, based on vtkEventQtSlotConnect
> >     m_connector->Connect( m_dicomReader, vtkCommand::EndEvent, this,
> > SLOT(slotEnded(vtkObject*)));
> >
> >
> >     m_connector->Connect( m_dicomReader, vtkCommand::StartEvent, this,
> > SLOT(slotStarted(vtkObject*)));
> >    // my slots:
> > void MyWidget::slotStarted(vtkObject* obj)
> > {
> >     std::cout << "---> Dicom reader started!" << endl;
> >
> >
> > }
> > void MyWidget::slotEnded(vtkObject* obj)
> > {
> >      std::cout << "---> Dicom reader ended!" << endl;
> > }
> >
> > Well, before to set my QProgressBar progress I was just put some output
> >
> >
> > to std::cout ( code are at the end ).
> > Then, I'm trying to do the same with the ProgressEvent, but only one
> > time are showed to me the message:
> > -- Progress: 0
> > -- Progress Text:
> >
> > Someone have some help or example how to use?
> >
> >
> > The code to understand are here:
> >
> > //connection
> > m_connector->Connect( m_dicomReader, vtkCommand::ProgressEvent, this,
> > SLOT(slotProgressChanged(vtkObject*)));
> >
> > //slot
> > void MyWidget::slotProgressChanged(vtkObject* obj)
> >
> >
> > {
> >     vtkDICOMImageReader *r = vtkDICOMImageReader::SafeDownCast(obj);
> >     std::cout << "-- Progress: " << r->GetProgress() << endl;
> >     std::cout << "-- Progress text: " << r->GetProgressText() << endl;
> >
> >
> > }
> >
> > Thnks in advance,
> >
> > Wagner Sales
> >
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > vtk-developers mailing list
> > vtk-developers at vtk.org
> > http://www.vtk.org/mailman/listinfo/vtk-developers
> >
>
>
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