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Re: how to know which is the class that sends the signal in qt ?
To answer yor question yes, use QObject::sender() and then cast it in to whatever class you want.
But basing the logic on the sending object is not considered as a good design, so try not to base your logic on the sender.
May be you could use QSignalMapper instead and base your logic on the formal slot parameter.
When you know how to do it then you may do it wrong.
When you don't know how to do it then it is not that you may do it wrong but you may not do it right.
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