How to use QVTKWidget

Question

I am working at a part of a big project. My goal is it to show a vtkRenderer in a QWidget. For that I wrote this class:

CModelViewWidget::CModelViewWidget(QWidget *parent) :
QWidget(parent)
{
    _qVtkWidget = new QVTKWidget(this,Qt::Widget);
    _rend = vtkRenderer::New();

    this->showVTK();

    _qVtkWidget->GetRenderWindow()->AddRenderer(_rend);

}

where _qVtkWidget is a QVTKWidget, _rend a vtkRenderer and showVTK() a function that adds a sphere to _rend.

I am able to compile this things, but when I want to test them the program crashes. The error message is:

[pathToProject]/qtCT/qtcreator-build/bin/mabviewer: symbol lookup error:[pathToProject]/qtCT/qtcreator-build/lib/libplugwdgt_modelviz.so: undefined symbol: _ZN10QVTKWidgetC1EP7QWidget6QFlagsIN2Qt10WindowTypeEE

I am using VTK5.8, QTCreator 2.4.1 with QT 4.7.4 and cmake. I linked the project and VTK and showing a normal vtkRenderWindow works fine. Is there something else to do, before QVTKWidget works?

Answer 1

My setup is a little different, but the code works. Setup: Qt x64 4.8.4 and VTK 5.10, using VS2010 x64 compiler.

First, add a verticalLayout widget to the main UI screen. I suppose any of the other layouts would work, but I haven't tried them. In the C++ editor try:

 _qvtkWidget = new QVTKWidget;
 ui->verticalLayout->addWidget(_qvtkWidget);
 ui->verticalLayout->update();
 _qvtkRenderer = vtkRenderer::New();
 _qvtkWidget->GetRenderWindow->AddRenderer(_qvtkRenderer);
 _qvtkRenderer->SetBackground(0,0,0); 
 _qvtkRenderer->Render();

Hope this works for you!

Answer 2

Try to set renderwindow in QVTKWidget and share interactor of that render window and add renderer to render window as:

..
renderWin->addRenderer(_ren); 
QVTKWidget1->SetRenderWindow(renderWin);
renderWin->SetInteractor(QVTKWidget1->GetInteractor());