Designer Plugin for QVTKOpenGLWidget?

[apalomer]

I am trying to make a designer plugin for the QVTKOpenGLWidget (it used to be there) but the designer crashes with the following error:

ASSERT: "this->testAttribute(Qt::WA_NativeWindow) == false" in file /path/to/vtk/GUISupport/Qt/QVTKOpenGLWidget.cxx, line 222

Note that I changed the path to vtk library in the error message to /path/to/vtk/. Any ideas on how to solve this?

Here is my example code :

Plugin header

#ifndef QVTKOPENGLWIDGEPLUGIN_H
#define QVTKOPENGLWIDGEPLUGIN_H

#include <QtUiPlugin/QDesignerCustomWidgetInterface>

class QVTKOpenGLWidgePlugin : public QObject, public QDesignerCustomWidgetInterface
{
  Q_OBJECT
  Q_INTERFACES(QDesignerCustomWidgetInterface)
  Q_PLUGIN_METADATA(IID "com.ics.Qt.CustomWidgets")

public:
  QVTKOpenGLWidgePlugin(QObject *parent = nullptr);

  bool isContainer() const;
  bool isInitialized() const;
  QIcon icon() const;
  QString domXml() const;
  QString group() const;
  QString includeFile() const;
  QString name() const;
  QString toolTip() const;
  QString whatsThis() const;
  QWidget *createWidget(QWidget *parent);
  void initialize(QDesignerFormEditorInterface *core);

private:
  bool initialized;
};

#endif  // QVTKOPENGLWIDGEPLUGIN_H

Plugin implementation

#include "qvtkopenglwidgetplugin.h"
#include <QVTKOpenGLWidget.h>

QVTKOpenGLWidgePlugin::QVTKOpenGLWidgePlugin(QObject *parent) : QObject(parent)
{
  initialized = false;
}

void QVTKOpenGLWidgePlugin::initialize(QDesignerFormEditorInterface * /* core */)
{
  if (initialized)
    return;

  initialized = true;
}

bool QVTKOpenGLWidgePlugin::isInitialized() const
{
  return initialized;
}

QWidget *QVTKOpenGLWidgePlugin::createWidget(QWidget *parent)
{
  return new QVTKOpenGLWidget(parent);
}

QString QVTKOpenGLWidgePlugin::name() const
{
  return "QVTKOpenGLWidget";
}

QString QVTKOpenGLWidgePlugin::group() const
{
  return "VTK widgets";
}

QIcon QVTKOpenGLWidgePlugin::icon() const
{
  return QIcon();
}

QString QVTKOpenGLWidgePlugin::toolTip() const
{
  return "";
}

QString QVTKOpenGLWidgePlugin::whatsThis() const
{
  return "";
}

bool QVTKOpenGLWidgePlugin::isContainer() const
{
  return false;
}

QString QVTKOpenGLWidgePlugin::domXml() const
{
  return "<ui language=\"c++\">\n"
         " <widget class=\"QVTKOpenGLWidget\" name=\"vtk_opengl_widget\">\n"
         "  <property name=\"geometry\">\n"
         "   <rect>\n"
         "    <x>0</x>\n"
         "    <y>0</y>\n"
         "    <width>150</width>\n"
         "    <height>150</height>\n"
         "   </rect>\n"
         "  </property>\n"
         "  <property name=\"toolTip\" >\n"
         "   <string>VTK OpenGL Widget</string>\n"
         "  </property>\n"
         "  <property name=\"whatsThis\" >\n"
         "   <string>VTK OpenGL Widget</string>\n"
         "  </property>\n"
         " </widget>\n"
         "</ui>\n";
}

QString QVTKOpenGLWidgePlugin::includeFile() const
{
  return "QVTKOpenGLWidget.h";
}