Right click functionality in PyQT widget broken from PyQT4 to PyQT5 update

Question

I previously developed an application with PyQT4, including a QListWidget, with a right-click-pop-up-window that allowed the user to quickly delete rows from the widget.

This was based on code from Stack Overflow: PyQt: How to get most of QListWidget

Unfortunately, upon upgrading to PYQt5, this functionality is now broken. I get the error: QListWidget object has no attribute 'connect'.

I suspect this is a due to a new implementation in PyQt5, which is quite annoying, although I can't find a simple way to fix this from the new Qt documentation.

Could someone suggest how I might restore my original functionality please?

I'd prefer to not roll back to Qt5 in the interest of future-proofing.

Luke Woodward · Accepted Answer · 2020-08-17 19:21:05Z

3

In PyQt5, PyQt4's old-style signals and slots are not supported.

So, to fix the problem, replace the line

        self.myListWidget.connect(self.myListWidget, QtCore.SIGNAL("customContextMenuRequested(QPoint)" ), self.listItemRightClicked)

with

        self.myListWidget.customContextMenuRequested.connect(self.listItemRightClicked)

and replace the line

        self.connect(menu_item, QtCore.SIGNAL("triggered()"), self.menuItemClicked)

with

        menu_item.triggered.connect(self.menuItemClicked)

edited Aug 17, 2020 at 19:21

answered Oct 29, 2016 at 13:52

Luke Woodward

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1 Comment

IanRoberts Over a year ago

This works perfectly, and the code is more readable too. Thanks.

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