Background

* I have created a SW application with a graphical user interface developed in Qt (C++).
* This application runs on individual clients, but I now want to "port it to the web", i.e., create a client/server framework through which the GUI gets presented in a web browser.
* Since I have spent fairly significant time trying to make the GUI reasonably user friendly, I want to port the GUI to the web without excessive effort (without having to redesign the GUI from scratch for the web application).

Question

Which SW framework(s) allow you to port a GUI (Qt classes) from a traditional client application, one inheriting from QMainWindow, i.e., to display the GUI within a web browser?