Qt signal slot different parameters

I would like to supply my own parameter (different from the Signal) to the Slot.I know this code doesn't work, but perhaps it illustrates the idea of what I am trying to accomplish.

Okay, sorry, I didn't point this out. Let's just say 'var' is a custom type created by someone else and it is able to have signal. It has been tested and proven to work. qt - Passing an argument to a slot - Stack Overflow up vote 1 down vote. Maybe you can subclass QAction with an m_increase member variable. Connect the triggered() signal to a slot on your new QAction subclass and emit a new signal (e.g. triggered(int number)) with the correct parameter. e.g. Signals & Slots | Qt 4.8 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.

qt slots 4.8 - How we can connect the signals and slot…

Mapping Many Signals to One - Qt Documentation The Trivial Solution. The most straightforward solution to our problem (but also the silliest) is to connect the ten QPushButton objects' clicked() signals to ten distinct slots called button0Clicked() to button9Clicked(), each of which emits the digitClicked(int) signal with a different parameter value (0 to 9).

Copied or Not Copied: Arguments in Signal-Slot Connections?

Qt: Signals & Slots - PUC-Rio In Qt, there is an alternative to the callback technique: signals and slots. A signal is ... will be called with the signal's parameters at the right time. Signals and ... PyQt/Using a signal mapper - Python Wiki Jun 5, 2014 ... ... signals with different parameters from QSignalMapper to slots. ... specify the signals to be connected to slots in a Python subclass of QWidget. Prefer to use normalised signal/slot signatures | -Wmarc

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Qt 5 continues to support the old string-based syntax for connecting signals and slots defined in a QObject or any class that inherits from QObject (including QWidget) connect( sender, SIGNAL( valueChanged( QString, QString ) ), receiver, SLOT( updateValue( QString ) ) );