For host, database name, and options i can leave them blank to use the
default value, but for the port i can’t with a SpinBox, since it _must_
have a value.
Qt’s driver uses -1 to mean “default port”, but i can not use the same
approach with the user interface, because there is no port -1, and makes
no sense to allow that value, specially since i then i have to allow 0
as well, which is a reserved port.
I also can not leave the SpinBox with PostgreSQL’s default port, 5432,
because that is slightly different than telling libpq to use the
“default”: if someone uses a ‘service=’ option, it would use the port in
the SpinBox rather than the one in ‘pg_service.conf’, if any.
My solution is to use a checkbox to tell the application “i wan to use a
port number”, and (will) only pass the port number if it is checked. On
the other hand, now i do not have a keyboard shortcut to focus on the
port number field.
jordi fita mas
dd2beba676