Re: Application hangs after thread execution

["Nickolai Dobrynin" <ndobrynin gmail com>]

Matt,

The rule of thumb here is to either (a) make all GUI calls from the same thread or (b) explicitly synchronize each and every such
call with a lock.  In your case, on_search_button_clicked violates that principle.

If my understanding of the task at hand is correct, you are trying to initiate a thread with a button click.  That thread, in turn, would initiate a database access.  Once this completes, you want the string "Done" displayed in the GUI.  Is that correct?  If so, I suggest you take a look at Glib::Dispatcher

http://www.gtkmm.org/docs/glibmm-2.4/docs/reference/html/classGlib_1_1Dispatcher.html

and use it to inform the GUI thread that the DB access is completed.

One more thing. Are you sure on_search_button_clicked() and search_db() are the right place for the show_all call?  Don't you want
it to be a part of your initialization logic, i.e. immediately after you are done setting up your widgets in the beginning?


Regards,

Nickolai