G4Qt.cc

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//
// ********************************************************************
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// *                                                                  *
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// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
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// * include a list of copyright holders.                             *
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// * institutes,nor the agencies providing financial support for this *
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// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
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// ********************************************************************
//
//
//
// L. Garnier
 
#include "G4Qt.hh"
 
#include "G4UImanager.hh"
#include "G4ios.hh"
 
#include <qapplication.h>
#include <qwidget.h>
 
#include <cstdlib>
#include <cstring>
 
#ifdef G4VIS_USE_VTK_QT
#  include "QVTKOpenGLNativeWidget.h"
#  include <qsurfaceformat.h>
#endif
 
G4Qt* G4Qt::instance = nullptr;
 
static G4bool QtInited = false;
 
/***************************************************************************/
G4Qt* G4Qt::getInstance()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  return G4Qt::getInstance(0, nullptr, (char*)"Geant4");
}
/***************************************************************************/
G4Qt* G4Qt::getInstance(int a_argn, char** a_args, char* a_class)
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  if (instance == nullptr) {
    instance = new G4Qt(a_argn, a_args, a_class);
  }
  return instance;
}
/***************************************************************************/
G4Qt::G4Qt(int a_argn, char** a_args, char* /*a_class */
)
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  argn = 0;
  args = nullptr;
  externalApp = false;
 
  // Check if Qt already init in another external app
  if (qApp) {
    externalApp = true;
    QtInited = true;
    SetMainInteractor(qApp);
    SetArguments(a_argn, a_args);
  }
  else {
    if (! QtInited) {  // Qt should be Inited once !
      // Then two cases :
      // - It is the first time we create G4UI  (argc!=0)
      //   -> Inited and register
      // - It is the first time we create G4VIS  (argc == 0)
      //   -> Inited and NOT register
 
      if (a_argn != 0) {
        argn = a_argn;
        args = a_args;
      }
      else {  // argc = 0
 
        // FIXME : That's not the good arguments, but I don't know how to get args from other
        // Interactor. Ex: How to get them from G4Xt ?
        argn = 1;
        args = (char**)malloc(1 * sizeof(char*));
        args[0] = (char*)malloc(10 * sizeof(char));
        strncpy(args[0], "my_app \0", 9);
      }
 
      int* p_argn = (int*)malloc(sizeof(int));
      *p_argn = argn;
#ifdef WIN32
      qApp->setAttribute(Qt::AA_UseDesktopOpenGL);
#endif
 
#ifdef G4VIS_USE_VTK_QT
      QSurfaceFormat::setDefaultFormat(QVTKOpenGLNativeWidget::defaultFormat());
#endif
      new QApplication(*p_argn, args);
      if (! qApp) {
        G4UImanager* UImanager = G4UImanager::GetUIpointer();
        G4int verbose = UImanager->GetVerboseLevel();
        if (verbose >= 2) {
          G4cout << "G4Qt : Unable to init Qt." << G4endl;
        }
      }
      else {
        QtInited = true;
        if (a_argn != 0) {
          SetMainInteractor(qApp);
        }
        SetArguments(a_argn, a_args);
      }
    }
  }
  //  AddDispatcher     ((G4DispatchFunction)XtDispatchEvent);
 
  /*
   * On some non-English locale, comma is used for the decimal separator instead of dot
   * bringing to weird behavior of strtod (string to double) function in user application.
   * This is "by design" from Qt, see https://bugreports.qt-project.org/browse/QTBUG-10994
   *
   *      $ LC_NUMERIC=fr_FR.UTF-8 ./qtstrtod
   *      strtod(0.1) = 0
   *      $ LC_NUMERIC=C ./qtstrtod
   *      strtod(0.1) = 0.1
   *
   * Jerome Suhard, [email protected]
   */
 
  // explicitly set the LC_NUMBERIC locale to "C"
  setlocale(LC_NUMERIC, "C");
}
/***************************************************************************/
G4Qt::~G4Qt()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  if (this == instance) {
    instance = nullptr;
  }
}
/***************************************************************************/
G4bool G4Qt::Inited()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  return QtInited;
}
/***************************************************************************/
void* G4Qt::GetEvent()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  return nullptr;
}
/***************************************************************************/
void G4Qt::FlushAndWaitExecution()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  if (! qApp) return;
  qApp->processEvents();
}
 
/***************************************************************************/
bool G4Qt::IsExternalApp()
/***************************************************************************/
/*!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
{
  return externalApp;
}