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// $Id: G4HepRepViewer.cc,v 1.26 2006/06/29 21:17:34 gunter Exp $
// GEANT4 tag $Name:  $
//

/**
 * @author Mark Donszelmann
 */

//HepRep
#include "HEPREP/HepRep.h"

//G4
#include "G4Types.hh"
//#include "G4VInteractorManager.hh"
#include "G4Scene.hh"
#include "G4HepRep.hh"
#include "G4HepRepSceneHandler.hh"
//This
#include "G4HepRepViewer.hh"

using namespace HEPREP;
using namespace std;

G4HepRepViewer::G4HepRepViewer (G4VSceneHandler& sceneHandler, G4HepRepMessenger& heprepMessenger, const G4String& name)
        : G4VViewer (sceneHandler, sceneHandler.IncrementViewCount(), name),
        geometryIncluded(false),
        messenger(heprepMessenger) {

#ifdef SDEBUG
    cout << "G4HepRepViewer::G4HepRepViewer " << name << endl;
#endif

    // Make changes to view parameters for HepRep...
    fVP.SetCulling(false);
    fDefaultVP.SetCulling(false);
}



G4HepRepViewer::~G4HepRepViewer () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::~G4HepRepViewer" << endl;
#endif
    dynamic_cast<G4HepRep*>(GetSceneHandler()->GetGraphicsSystem())->removeViewer();
}


void G4HepRepViewer::ClearView () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::ClearView" << endl;
#endif
}

void G4HepRepViewer::SetView () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::SetView" << endl;
#endif
}


/* NOTE:
    /run/beamOn         calls ShowView for every event (unless accumulate is set)
    /vis/viewer/flush   calls /vis/viewer/refresh followed by /vis/viewer/update
    /vis/viewer/refresh calls SetView, ClearView, DrawView
    /vis/viewer/update  calls ShowView
*/
void G4HepRepViewer::DrawView () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::DrawView" << endl;
#endif
    if (!geometryIncluded) {
        // draws the geometry
        NeedKernelVisit();
        ProcessView();
        geometryIncluded = true;
    }
}

void G4HepRepViewer::ShowView () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::ShowView" << endl;
#endif
    G4VViewer::ShowView();

    G4HepRepSceneHandler* sceneHandler = dynamic_cast<G4HepRepSceneHandler*>(GetSceneHandler());
    if (sceneHandler->closeHepRep()) {
        sceneHandler->openHepRep();
        if (messenger.appendGeometry()) geometryIncluded = false;
    }
}

void G4HepRepViewer::FinishView () {
#ifdef SDEBUG
    cout << "G4HepRepViewer::FinishView" << endl;
#endif
    G4VViewer::FinishView();
}

void G4HepRepViewer::reset() {
    geometryIncluded = false;
}  
