Option Text Editor -> Completion: Automatically insert matching character.
Can this option be extended to add spaces between brackets and contents? This is a code style preference which I use for all my projects to improve readability. As a code style option it should be in C++ > "Code Style" tab though.
example:
int function( int argument1, QString argument2 )
{}

and
if( condition )
{}

Same thing obviously does not apply for auto-quotes.