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Hi,
I'd code a SLOT in Mainform.ui (from Designer) and I the Connect in myWidget() class constructor.
I call emit mySignal() and starts the SLOT in mainform.
But I can make instead of "emit mySignal()" mainForm->function() (without signal). The result it's the same! and then, what do I use?
Wich in the different?
Thanks
Signals & slots mechanism:
- many-to-many connections,
- you can connect and disconnect objects in the runtime,
- connected objects doesn't have to know anything about each other.
Direct method invocation:
- many-to-one connection,
- you must have a pointer or the object itself to invoke a method,
- there is no way to disconnect those object without using conditional statements around the call,
- a bit faster (although speed-up usually won't be noticeable).
What to use depends on the design.