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// ********************************************************************
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//
//
//
// 
// Andrew Walkden  10th February 1997
// OpenGL graphics system factory.

#include "G4VisFeaturesOfOpenGL.hh"
#include "G4VSceneHandler.hh"
#include "G4OpenGLStoredSceneHandler.hh"
#include "G4OpenGLViewer.hh"
#include "G4OpenGLStoredXm.hh"
#include "G4OpenGLStoredXmViewer.hh"
#include "G4OpenGLViewerMessenger.hh"
#include "G4OpenGLXmViewerMessenger.hh"

G4OpenGLStoredXm::G4OpenGLStoredXm ():
  G4OpenGLXm ("OpenGLStoredXm",
              "OGLSXm",
              G4VisFeaturesOfOpenGLSXm (),
              G4VGraphicsSystem::threeD)
{
  G4OpenGLViewerMessenger::GetInstance();
  G4OpenGLXmViewerMessenger::GetInstance();
}

G4VSceneHandler* G4OpenGLStoredXm::CreateSceneHandler (const G4String& name) {
  G4VSceneHandler* pScene = new G4OpenGLStoredSceneHandler (*this, name);
  return    pScene;
}

G4VViewer* G4OpenGLStoredXm::CreateViewer (G4VSceneHandler& scene, const G4String& name) {
  G4VViewer* pView =
    new G4OpenGLStoredXmViewer ((G4OpenGLStoredSceneHandler&) scene, name);
  if (pView) {
    if (pView -> GetViewId () < 0) {
      delete pView;
      pView = 0;
      G4cerr << "G4OpenGLStoredXm::CreateViewer: error flagged by"
	" negative view id in G4OpenGLStoredXmViewer creation."
	"\n Destroying view and returning null pointer." << G4endl;
    }
  }
  else {
    G4cerr << "G4OpenGLStoredXm::CreateViewer: null pointer on"
      " new G4OpenGLStoredXmViewer." << G4endl;
  }
  return pView;
}
