[Qt-interest] Showing a "Please wait" dialog during sql query

[Gillen Daniel]

Hi @all

I have a massive problem here and don't seem to find a solution for it.

I'm developping a database application based on a MySQL database and I 
would need to display a "Please wait" dialog while
populating a QSqlQueryModel. The data from QSqlQueryModel gets displayed 
in a widget in my main window, so I have to exec the query in my main 
thread. The problem is that any dialog I open before querying the data 
hangs as my query blocks the main thread.

Does anyone has an idea on how I could solve this? I would need some 
sort of 2nd thread which displays the dialog with his own event loop but 
as far as I understand, Qt does not support GUI interaction in a second 
thread. Or is it perhaps possible to exec the query in a second thread 
and then move the whole QSqlQueryModel and database connection to my 
main thread?

Thx in advance

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