Qt signal slot spy

One of the key features of Qt is its use of signals and slots to communicate between If a signal is connected to a slot then the slot is called when the signal.  · Qt Slot Testing. Ask Question Find the table where Qt stores the connections sender->*signal to receiver->*slot // slider exists QSignalSpy spy. Qt Signals And Slots Fold Unfold. Table of Contents. Objectives. Meta Many signals can be connected to the same slot; A signal can be connected to another signal;.

How Qt Signals and Slots Work

Instead, the new code needs to be:. UniqueConnection ; If the connection doesn't exist, then connect returns true. Thank you for reading all the long post and thank you really really much if you can and do also answer some of my questions. But I think I can't verify the sender this way wouldn't be a big problem. And as the name already states, it's a " signal spy", not a " slot spy".

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New Signal Slot Syntax

One of the key features of Qt is its use of signals and slots to communicate between objects. Their use encourages the development of reusable components. A signal is emitted when something of potential interest happens.

A slot is a Python callable. If a signal is connected to a slot then the slot is called when the signal is emitted. The code or component that emits the signal does not know or care if the signal is being used.

A signal specifically an unbound signal is a class attribute. When a signal is referenced as an attribute of an instance of the class then PyQt5 automatically binds the instance to the signal in order to create a bound signal. This is the same mechanism that Python itself uses to create bound methods from class functions. A bound signal has connect , disconnect and emit methods that implement the associated functionality. A signal may be overloaded, ie.

A signal may be indexed with a signature in order to select the one required. A signature is a sequence of types. New signals can be defined as class attributes using the pyqtSignal factory. Alternatively each may be a sequence of type arguments. In this case each sequence defines the signature of a different signal overload.

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Setup a private space for you and your coworkers to ask questions and share information. I'm currently coding some unit tests for one of my classes. However, I quickly ran into an issue.

It seems that QSignalSpy sometimes does not catch the disconnected signal emitted by my Client class. Here's my unit test:. Does anyone have an explanation as to why the QSignalSpy.

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I have fixed this by implementing two helper methods to verify the count of QSignalSpy and then wait if the count isn't correct.

I then use those methods in my unit tests. Learn more about Teams. Here's my unit test: Any, ; if! TrebledJ 5, 4 4 gold badges 14 14 silver badges 35 35 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.


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