Qt signal slot different arguments

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Signals & Slots | Qt 4.8

May 22, 2017 ... This allow to connect signals with different signatures to slot (vice versa to @ pnezis answer): private slots: ... Also Qt 4.8 suggest useful QSignalMapper class:. Signals & Slots | Qt Core 5.12.3 - Qt Documentation Signals and slots can take any number of arguments of any type. ... The situation is slightly different when using queued connections; in such a case, the code ... New Signal Slot Syntax - Qt Wiki Dec 24, 2018 ... This page was used to describe the new signal and slot syntax ... Argument can be by typedefs or with different namespace specifier, and it ... Connecting signals and slots with different parameters: Is it ...

You can also check if an object inherits a specific class, for example: They must also derive directly or indirectly from QObject.

You cannot control what will be sent through the signal in the connect statement - only the sender itself uses "emit" keyword (well, can use it) and provides concrete argument (QPushButton pointer in your case). Signals & Slots | Qt 4.8

qt - Passing an argument to a slot - Stack Overflow

Смущает что в сигнале/слоте передается указатель на локальную переменную image определенную в функции RenderThread::run(). Смущает потому что(на сколько я ничего не понимаю)при передаче сигнала между тредами не известно когда сигнал попадет в слот.

It also knows the type of the signal arguments so it can do the proper type conversion. We use List_Left to only pass the same number as argument as the slot, which allows connecting a signal with many arguments to a slot with less arguments. QObject::connectImpl is the private internal function that will perform the connection.

Qt/C++ - Lesson 024. Signals and Slot in Qt5 - EVILEG