testing how to add menus and shortcuts

Author: aoloe

qt5-signals/README.md

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+- https://github.com/cpp11nullptr/lsignal: lsignal (or lightweight signal) is a very little and fast C++ thread-safe implementation of signal and slot system which is based on modern C++11 code.
+- https://github.com/dgovil/PySignal: A purely Python implementation of the Qt signal system with no QObject dependencies
+
+how scribus manages the menus:
+
+- `scribus/menumanager.cpp`: seems to be managing the menus through strings
+- `ActionManager::createDefaultMenuNames()` fills defMenuNames
+  -  `static QVector< QPair<QString, QStringList> > defMenuNames;`
+  - `static QVector< QPair<QString, QStringList> > defMenus;`
+  - `scrActions` seems to contain the real actions
+  - `scrActions` is a vector filled by the functions called in `ActionManager::createActions()`
+- `scribus/scribus.cpp` connects the `scrActions` with real actions