QT C++ GUI Tutorial 12- How to open a new window after successful Login

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c++ - How would I open a new window from a button in the main
How to show another window from mainwindow in QT Login
How to move to another window in Qt by a pushbutton Login
How to open a new window in Qt Login
Open new window when button on main-window is clicked

Thread: Open new window on menu action.
 QMainWindow open a new QMainWindow
Thread: Open a window inside another window Login
Thread: right way to open a new window Login
Open a window inside another window Login