VTK < 8 doesn't use the qt naming style.

Fixes manual_registration.

Author: larshg

apps/src/manual_registration/manual_registration.cpp

@@ -72,11 +72,17 @@ ManualRegistration::ManualRegistration()
   renderWindow_src->AddRenderer(renderer_src);
   vis_src_.reset(new pcl::visualization::PCLVisualizer(renderer_src, renderWindow_src, "", false));
   qvtk_widget_src = new QVTKOpenGLNativeWidget(this);
+  qvtk_widget_src->setRenderWindow(vis_src_->getRenderWindow());
+  vis_src_->setupInteractor(qvtk_widget_src->interactor(),
+                            qvtk_widget_src->renderWindow());
 #else
   vis_src_.reset(new pcl::visualization::PCLVisualizer("", false));
   qvtk_widget_src = new QVTKWidget(this);
+  qvtk_widget_src->SetRenderWindow(vis_src_->GetRenderWindow());
+  vis_src_->setupInteractor(qvtk_widget_src->GetInteractor(),
+                            qvtk_widget_src->GetRenderWindow());
 #endif
-  qvtk_widget_src->setRenderWindow(vis_src_->getRenderWindow());
+  
   vis_src_->setupInteractor(qvtk_widget_src->interactor(),
                             qvtk_widget_src->renderWindow());
   vis_src_->getInteractorStyle()->setKeyboardModifier(
@@ -100,13 +106,17 @@ ManualRegistration::ManualRegistration()
   renderWindow_dst->AddRenderer(renderer_dst);
   vis_dst_.reset(new pcl::visualization::PCLVisualizer(renderer_dst, renderWindow_dst, "", false));
   qvtk_widget_dst = new QVTKOpenGLNativeWidget(this);
+  qvtk_widget_dst->setRenderWindow(vis_dst_->getRenderWindow());
+  vis_dst_->setupInteractor(qvtk_widget_dst->interactor(),
+                            qvtk_widget_dst->renderWindow());
 #else
   vis_dst_.reset(new pcl::visualization::PCLVisualizer("", false));
   qvtk_widget_dst = new QVTKWidget(this);
+  qvtk_widget_dst->SetRenderWindow(vis_dst_->GetRenderWindow());
+  vis_dst_->setupInteractor(qvtk_widget_dst->GetInteractor(),
+                            qvtk_widget_dst->GetRenderWindow());
 #endif
-  qvtk_widget_dst->setRenderWindow(vis_dst_->getRenderWindow());
-  vis_dst_->setupInteractor(qvtk_widget_dst->interactor(),
-                            qvtk_widget_dst->renderWindow());
+
   vis_dst_->getInteractorStyle()->setKeyboardModifier(
     pcl::visualization::INTERACTOR_KB_MOD_SHIFT);