G4Qt3D.cc

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// ********************************************************************
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// * technical work of the GEANT4 collaboration.                      *
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//
// John Allison  17th June 2019
 
#if defined (G4VIS_BUILD_QT3D_DRIVER) || defined (G4VIS_USE_QT3D)
 
#include "G4Qt3D.hh"
#include "G4Qt3DSceneHandler.hh"
#include "G4Qt3DViewer.hh"
 
#include "G4UIQt.hh"
#include "G4UImanager.hh"
#include "G4UIbatch.hh"
 
G4Qt3D::G4Qt3D():
G4VGraphicsSystem
("Qt3D",
 "Qt3D",
 "Qt3D graphics driver",
 G4VGraphicsSystem::threeDInteractive) {}
 
G4Qt3D::~G4Qt3D() {}
 
G4VSceneHandler* G4Qt3D::CreateSceneHandler(const G4String& name) {
  G4VSceneHandler* pScene = new G4Qt3DSceneHandler(*this, name);
  return pScene;
}
 
G4VViewer* G4Qt3D::CreateViewer(G4VSceneHandler& scene,
                               const G4String& name) {
  G4VViewer* pView =
  new G4Qt3DViewer((G4Qt3DSceneHandler&) scene, name);
  if (pView) {
    if (pView->GetViewId() < 0) {
      G4cerr <<
      "G4Qt3D::CreateViewer: ERROR flagged by negative"
      " view id in G4Qt3DViewer creation."
      "\n Destroying view and returning null pointer."
      << G4endl;
      delete pView;
      pView = 0;
    }
  }
  if (!pView) {
    G4cerr <<
    "G4Qt3D::CreateViewer: ERROR: null pointer on new G4Qt3DViewer."
    << G4endl;
  }
  return pView;
}
 
G4bool G4Qt3D::IsUISessionCompatible () const
{
  G4bool isCompatible = false;
  G4UImanager* ui = G4UImanager::GetUIpointer();
  G4UIsession* session = ui->GetSession();
 
  // If session is a batch session, it may be:
  // a) this is a batch job (the user has not instantiated any UI session);
  // b) we are currently processing a UI command, in which case the UI
  //    manager creates a temporary batch session and to find out if there is
  //    a genuine UI session that the user has instantiated we must drill
  //    down through previous sessions to a possible non-batch session.
  while (G4UIbatch* batch = dynamic_cast<G4UIbatch*>(session)) {
    session = batch->GetPreviousSession();
  }
 
  // Qt windows are only appropriate in a Qt session.
  if (session) {
    // If non-zero, this is the originating non-batch session
    // The user has instantiated a UI session...
    if (dynamic_cast<G4UIQt*>(session)) {
      // ...and it's a G4UIQt session, which is OK.
      isCompatible = true;
    }
  }
  return isCompatible;
}
 
#endif  // #if defined (G4VIS_BUILD_QT3D_DRIVER) || defined (G4VIS_USE_QT3D)