(Python / Qt Designer) Strange unwanted popup in the top left corner of my TableWidget that appears intermittently?

orch face

I have encountered a strange issue.

I am using Qt Designer (the free one; not Qt Creator) and I am trying to make a basic table UI. The main window has multiple tabs, each tab has a frame in it, and each frame has a QTableWidget inside of it. Sometimes when I run the program, a weird little box in the top left corner appears. I can't click on it or interact with it, but it does seem to block interaction with the first column header under it. And sometimes when I run it, this thing doesn't appear.

with scroll bars as needed

One thing I did notice is that if I set the table's scroll policy to horizontal ScrollBarAlwaysOff and vertical ScrollBarAlwaysOff, the popup box loses its scroll bars. This is why I suspect it's something to do with the table.

with both scroll bars always off

Any idea what this is and how to get rid of it? I have tried playing around with various settings on the table, but none have permanently removed this. It comes back intermittently, sometimes even with no changes to the code or UI file.

Christian Ehrlicher

You've a free (not in a layout) widget somewhere in the ui file - take a look into the object tree in the designer and you will find it.

orch face

Ah, found it. The frame container was not laid out correctly within the tab widget. Thanks!