Qt Designer’s signals-and-slots editing mode includes a drag-and-connect mechanism that allows you to connect widgets using Qt’s signals and slots. Layout objects can also be connected using ...

Notice that Qt Designer can generate the necessary signal/slot connections for you at the same time. Menubars generally have more choices than toolbars, so it is not surprising that you next have the ...

From its beginning, one of Qt's strengths is the documentation Trolltech delivers. Qt programming involves concepts--slots and signals, for example--unfamiliar to beginning C++ coders.