[Qt-interest] gui qt project with a MainWindow ui and several QDockWidget ui.

[Sergei Stolyarov]

It looks like you are using wrong class names, look into the generated 
"ui_dockwidget1.h", there should be no Ui_Dock classes

You have to include "ui_dockwidget1.h" in the .h file. Then write in private 
section of your class something like this:

private:
  Ui::DockWidget1 ui; //<-- namespace "Ui"!

Then in the constructor:

ui.setupUi(this);

Or the same thing with pointers to Ui::DockWidget1 (DockWidget1 — it's a name 
of class in your .ui file)

-- 
Best regards,
Sergei Stolyarov