qtgui.h

/*
 * File: qtgui.h
 * -------------
 *
 * @author Marty Stepp
 * @version 2021/04/09
 * - added sgl namespace
 * @version 2018/09/09
 * - added doc comments for new documentation generation
 * @version 2018/08/23
 * - renamed to qtgui.h
 * @version 2018/07/03
 * - initial version
 */


#ifndef _qtgui_h
#define _qtgui_h

#include <string>
#include <QApplication>
#include <QObject>

#include "gthread.h"
#include "gtypes.h"

#define EXITING_DUE_TO_WINDOW_CLOSE 106

namespace sgl {

class GWindow;

class QSGLApplication : public QApplication {
public:
    QSGLApplication(int& argc, char *argv[]);
    bool notify(QObject* receiver, QEvent* e) override;
};


class QtGui : public QObject {
    Q_OBJECT

public:
    void exitGraphics(int exitCode = 0);


    string getApplicationDisplayName() const;

    int getArgc() const;

    char** getArgv() const;

    void initializeQt();

    static QtGui* instance();

    void setArgs(int argc, char** argv);

    void startBackgroundEventLoop(GThunkInt mainFunc, bool exitAfter = true);

    void startEventLoop(bool exitAfter = true);


public slots:
    void processEventFromQueue();

private:
    Q_DISABLE_COPY(QtGui)

    QtGui();   // forbid construction

    QSGLApplication* getApplication();

    bool _initialized;
    int _argc;
    char** _argv;

    static QSGLApplication* _app;
    static QThread* _qtGuiThread;
    static GThread* _studentThread;
    static QtGui* _instance;

    friend class GEventQueue;
    friend class GThread;
    friend class GWindow;
};

/*
 * Code that runs when student thread shuts down.
 * @private
 */
void studentThreadHasExited(const string& reason);

} // namespace sgl

#endif // _qtgui_h