Qt5 Signal Slot Arguments
Qt-signal-tools is a collection of utility classes related to signal and slots in Qt. It includes: QtCallback - Package up a receiver and slot arguments into an object for invoking later. QtSignalForwarder - Connect signals and events from objects to QtCallback or arbitrary functions. @Botje static assertion failed: The slot requires more arguments than the signal provides. static assertion failed: Signal and slot arguments are not compatible. but why then does the old syntax work? – Artem072 Jun 2 at 12:32.
Graphical applications (GUI) are event-driven, unlike console or terminal applications. A users action like clicks a button or selecting an item in a list is called an event.
If an event takes place, each PyQt5 widget can emit a signal. A signal does not execute any action, that is done by a slot.
Related course:
Create GUI Apps with PyQt5
Signals and slot introduction
Consider this example:
The button click (signal) is connected to the action (slot). In this example, the method slot_method will be called if the signal emits.
This principle of connecting slots methods or function to a widget, applies to all widgets,
Qt5 Signal Slot Arguments Against
or we can explicitly define the signal:
PyQt supports many type of signals, not just clicks.
Example
We can create a method (slot) that is connected to a widget. A slot is any callable function or method.
On running the application, we can click the button to execute the action (slot).
Qt5 Signal Slot Arguments Generator
If you are new to programming Python PyQt, I highly recommend this book.