Override PCLVisualizerInteractorStyle mouse click

surajj4837

I m creating my application in Qt. I have integrated a 3D PCL
viewer in a QVTWidget plugin. I want to change the standard functions of user input like left mouse click on the viewer window.

Following are the class details:

class SiLS : public QMainWindow, pcl::visualization::PCLVisualizerInteractorStyle
{
   Q_OBJECT

    public:
       SiLS(QWidget *parent = nullptr);
       ~SiLS();

       void OnLeftButtonDown() override
       {
         std::cout << "Pressed left mouse button." << std::endl;
       }

    private slots:

    private:
       Ui::SiLS *ui;

    protected:

       pcl::visualization::PCLVisualizer::Ptr viewer;
};

SiLS::SiLS(QWidget *parent) : QMainWindow(parent) , ui(new Ui::SiLS)
{
   ui->setupUi(this);

   // Set up the QVTK window
   viewer.reset (new pcl::visualization::PCLVisualizer ("viewer", false));
   ui->BEV_Display->SetRenderWindow(viewer->getRenderWindow());
   viewer->setupInteractor(ui->BEV_Display->GetInteractor(), ui->BEV_Display->GetRenderWindow(), SiLS::New());
   ui->BEV_Display->update();
}

SiLS::~SiLS()
{
    delete ui;
}

But after left clicking inside the window I m not getting the print statement in output.
After closing the application window I m getting following errors:

ERROR: In /home/suraj/VTK/VTK-7.1.1/Common/Core/vtkObject.cxx, line 156 vtkObject (0x7ffda4148b80): Trying to delete object with non-zero reference count.

Generic Warning: In /home/suraj/VTK/VTK-7.1.1/Common/Core/vtkObjectBase.cxx, line 93 Trying to delete object with non-zero reference count.

Is there anything I m missing?

SGaist

Hi,

@surajj4837 said in Override PCLVisualizerInteractorStyle mouse click:

class SiLS : public QMainWindow, pcl::visualization::PCLVisualizerInteractorStyle

Why the double inheritance ?

surajj4837

This might be one of the mistakes. I want to override the left click function of PCLVisualizer, which is member of SiLS class (which is the only class I have created). So I inherited the PCLVisualizerInteractorStyle which has the virtual function of left click.

SGaist

C++ does not work like that. Create a proper subclass and then use that one for the member variable.