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Is there any way to completely save and restore the state of many QDockWidgets (visibility, floatingness, docking corner, size and position against other docks, tabs ...)?
I tried to store the properties size, pos and the last dock area, the QDockWidgets are on the correct side of QMainWindow, but not tabbed, neither their size nor order is preserved, they are not tabbed.
Has anyone successfully solved this problem? I think it is important to have the application user-friendly, especially when using many DockWidgets.

I use Ubuntu and I haven't got an opportunity to try it on Windows yet.

I've made a convenience class DockWidget (instead of QDockWidget), which gets a pointer to its child in its constructor, as well as the section name in settings (only in the first c-tor). Below I attached the whole code. gSettings is a global object of type QSettings.

Thank You for Your time, ask me if You need further information.

I finally figured it out, it is easy, but I have missed it on the first time

for those who are interested:

1) Create QDockWidgets and QToolbars desired.
2) Assign each of them an unique objectName.
3) Call QMainWindow::restoreState( const QByteArray & array ).

In the destructor, call QByteArray QMainWindow::saveState();

The QByteArray could be stored in QSettings, regular file, etc.