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qtsignals-slots

Check which signal is the calller of the signal

Is there any way to know whether inst1 or inst2 was the trigger for the slot in the next code?

MyClass inst1 ,inst2;

connect (inst1, sigInst1(), this, mySlot());
connect (inst2, sigInst2(), this, mySlot());


void mySlot(){
   // here I want to know if inst1 or inst2 got me into this slot.

}
Solution

  • Just call sender() and you get the pointer of the object emitting the signal.

    Entry for QObject * QObject::sender() const [protected] in documentation is here.