g4display_example.cc

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// geant4
#include "G4VisExecutive.hh"
#include "G4RunManagerFactory.hh"
 
// g4display
#include "g4SceneProperties.h"
#include "g4display.h"
#include "g4display_options.h"
 
// gemc
#include "glogger.h"
 
// qt
#include <QApplication>
#include <QMainWindow>
#include <QTimer>
 
int main(int argc, char* argv[]) {
    // Initialize options and logging.
    // GOptions is configured with the g4display option schema, which includes view/camera/dawn/text options.
    auto gopts   = std::make_shared<GOptions>(argc, argv, g4display::defineOptions());
    auto log     = std::make_shared<GLogger>(gopts, SFUNCTION_NAME, G4DISPLAY_LOGGER);
    auto gui     = gopts->getSwitch("gui");
    auto timeout = gopts->getScalarDouble("tt");
    int  ret     = EXIT_SUCCESS;
 
    log->info(0, "Starting g4display example...");
 
    // Optional GUI setup (only if --gui is passed).
    // Qt objects are created dynamically to keep CLI mode lightweight.
    QApplication* app    = nullptr;
    QMainWindow*  window = nullptr;
 
    if (gui) {
        log->info(0, "g4display", "Running in GUI mode...");
        app    = new QApplication(argc, argv);
        window = new QMainWindow();
        window->setWindowTitle(QString::fromUtf8("g4display example"));
    }
 
    // Initialize Geant4 visualization manager.
    auto visManager = new G4VisExecutive;
    visManager->Initialize();
 
    // Build scene properties helper (command list generation based on options).
    auto g4SceneProperties = new G4SceneProperties(gopts);
 
    // If GUI, show the window and run Qt loop.
    if (gui) {
        auto g4display = new G4Display(gopts, window);
        window->setCentralWidget(g4display);
        window->show();
 
        // Quit after timeout (milliseconds). This allows automated tests/demos without manual close.
        QTimer::singleShot(timeout, [] {
            QCoreApplication::quit(); // stop the event loop
        });
 
        ret = QApplication::exec();
 
        // Clean up GUI resources.
        delete g4display;
        delete window;
        delete app;
    }
    else {
        // CLI mode: the example currently only initializes infrastructure and exits.
        // A future CLI extension could apply g4SceneProperties->scene_commands(...) to the Geant4 UI manager.
        log->info(0, "Running g4display in command line mode...");
    }
 
    delete g4SceneProperties;
    delete visManager;
 
    return ret;
}