给定pyqtBoundSignal如何确定插槽？ [英] Given a pyqtBoundSignal how to determine the slot?

问题描述

给出信号后，如何确定特定信号所连接的插槽？

Given the signal, how can I determine the slot that a particular signal is connected to?

我熟悉如何连接信号和插槽，这更多是出于调试目的。

I am familiar with how to connect signal and slots, this is more for debugging purposes.

我是使用pyqt5，python 2.7

I am using pyqt5, python 2.7

推荐答案

没有 the插槽，因为一个信号可以连接到多个插槽，或多个其他信号，或同一信号/插槽多次。但是无论如何，没有内置的API可以列出所有当前连接。

There is no such thing as "the" slot, because a signal can be connected to multiple slots, or multiple other signals, or the same signal/slot multiple times. But in any case, there is no built-in API that can list all the current connections.

您可以获得当前连接的 count 信号的连接，例如：

You can get a count of the current connections for a signal, like this:

    count = button.receivers(button.clicked)

还有 connectNotify 和 disconnectNotify -但这不会使您走得更远，因为重新实现这些方法只会告诉您该对象连接或断开的信号。

There is also connectNotify and disconnectNotify - but that doesn't get you much further, because reimplementing those methods will only tell you which signals were connected or disconnected for the object.

QtTest 模块具有 QSignalSpy （仅在PyQt5中可用），它可以记录给定信号的所有发射。但是，再次，这只会给您发送的参数，而不是参数发送到的位置。

The QtTest module has QSignalSpy (only available in PyQt5), which can record all the emissions of a given signal. But, again, that will only give you the arguments that were sent, rather than where they were sent to.

我想Qt不提供API的原因

I suppose the reason why Qt doesn't provide an API for this is that the list of connected items is potentially very volatile.

PS：

我忘了提 dumpObjectInfo ，它显然可以满足您的要求，但是只能与Qt的调试版本一起使用-对于发布版本，它什么也不做。

I forgot to mention dumpObjectInfo, which apparently does what you're asking for, but will only work with a debug build of Qt - for release builds, it does nothing.

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