Thread: QFileSystemWatcher send fileChanged() signal to a qml slot

It is a more convenient way to exchange data between QML and C++ and does not need Signals or Slots in first instance, because the

As well, application needs to know whether the user is clicking the button The application may need to relay this clicking event to other applications QML has

qml slot QML signal slot, call C ++ functions, Programmer Sought, the best programmer technical posts sharing site

osrs boot slot signalsandslot Qt support: ssupport-center Introduction to Qt QML