[vtkusers] Cannot refresh rendering window automatically

[Jianlong Zhou]

hi, all,
I use the vtk attached sample program as the basis for my MFC 
based project. Now I have a problem. I add a member function in 
sampleview class to realize my own rendering procedure. I use the 
method like: this->GetDocument()->Props->AddItem() to add my 
Actors and Voumes into rendering pipeline. When I run it, I cannot 
get rendering automatically, I must refresh the client window and 
then get the rendering as I want. I know I must send WM_PAINT to 
OnDraw() function, I have tried several methods and it still cannot 
work. Is my method as following right? Anyone have any ideas?

Below is some segment of my member function:
CSampleView::OnVolumeRendering()
{
  //some processing lines  ..
.............
   this->GetDocument()->Props->AddItem(this->myActor);
   this->Interactor->Initialize();
   this->RenderWindow->Render();
   this->Interactor->Start();
}

Thank you very much for your help.

Jianlong