G4OpenGLQt.cc

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// John Allison  27th October 2012
// Base class for OpenGLImmediate/StoredQt graphics system factories.
 
#ifdef G4VIS_BUILD_OPENGLQT_DRIVER
 
#include "G4OpenGLQt.hh"
 
#include "G4UIQt.hh"
#include "G4UImanager.hh"
#include "G4UIbatch.hh"
 
G4OpenGLQt::G4OpenGLQt (const G4String& name,
                        const G4String& nickname,
                        const G4String& description,
                        Functionality f):
G4VGraphicsSystem (name,
                   nickname,
                   description,
                   f)
{}
 
G4bool G4OpenGLQt::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