Special-Purpose Global Functions Exported by Qt

Qt provides a few low-level global functions for fine-tuning applications. Most of these perform very specific tasks and are platform-specific. In general, we recommend that you try using Qt's public API before resorting to using any functions mentioned here.

These functions are exported by QtCore and QtGui, but most of them aren't declared in Qt's header files. To use them in your application, you must declare them before calling them. For example:

    #ifdef Q_WS_X11
    void qt_x11_wait_for_window_manager(QWidget *widget);
    #endif

    int main(int argc, char *argv[])
    {
        QApplication app(argc, argv);
        ...
        window.show();
    #ifdef Q_WS_X11
        qt_x11_wait_for_window_manager(&window);
    #endif
        ...
        return app.exec();
    }

These functions will remain as part of Qt for the lifetime of Qt 4.

Functions:

• void qt_set_library_config_file(const QString &fileName)
• void qt_set_sequence_auto_mnemonic(bool enable)
• HDC qt_win_display_dc()
• void qt_x11_set_fallback_font_family(int script, const QString &family)
• void qt_x11_wait_for_window_manager(QWidget *widget)
• void qt_mac_secure_keyboard(bool enable)
• void qt_mac_set_dock_menu(QMenu *menu)
• void qt_mac_set_menubar_icons(bool enable)
• void qt_mac_set_menubar_merge(bool enable)
• void qt_mac_set_native_menubar(bool enable)
• void qt_mac_set_press_and_hold_context(bool enable)