Slot And Signal Qt

Hi , I have gone through the documentation, and spent some times to understand how is the magic work between signal and slots. So far, I have already understood the signal and slots on high level abstraction. However, this 'emit' pseudo-keyword is really confusing for novice guy like me. Some said its a syntactic sugar, some said there is a moc -object that works with emit(). I wanted to know how,where, when , why to apply this emit() pseudo -keyword . Perhaps we can start with the example provided in the documentation.

1. Hi, I have gone through the documentation, and spent some times to understand how is the magic work between signal and slots. So far, I have already understood the signal and slots on high level abstraction. However, this 'emit' pseudo-keyword is really confusing for novice guy like me.
2. Signals: void sendSetProcFunc(const UnnecessaryWrapper & procFunc); public slots: void onSetProcFunc(const UnnecessaryWrapper & procFunc); Edit: I see that Thiago already triaged it as a moc issue. Okay, for the sake of argument try to typedef your argument type.
3. C qt signals-slots. Improve this question. Follow asked Jul 25 '19 at 12:16. Daljit97 daljit97. 558 10 10 silver badges 30 30 bronze badges.

Qt Signal Emit

Signal and Slot Signals and slots are used for communication between objects. The signals and slots mechanism is a central feature of Qt and probably the part that differs most from the features provided by other frameworks. In GUI programming, when we change one. Signals and slots are loosely coupled: A class which emits a signal neither knows nor cares which slots receive the signal. Qt’s signals and slots mechanism ensures that if you connect a signal to a slot, the slot will be called with the signal’s parameters at the right time. Signals and slots can take any number of arguments of any type.

Qt Thread Emit Signal

From what i understand from that code. valueChanged() this function will 'track' has 'm_value' changed to new value yet? If yes , then 'send' the signal to the setValue this SLOT to perform operation . is my interpretation correct? if yes, why still to implement 'emit valueChanged(value) ' in the SLOT function ? else please correct my interpretation .Thank you