On restore, LayoutSaver assigns zero width/height to windows from disconnected screen

[petrmanek]

Hi, I have a very specific bug report that concerns LayoutSaver and multiple-screen setups. This was reported to me by a user of my app, which relies on KDDW. Happens on the latest Linux Mint.

Steps to reproduce:

1. Use a PC with more than 1 screen.
2. Open the example app, create a layout that has widgets/windows in all screens.
3. Save the layout to a file and close the app.
4. Disconnect one of the screens from the PC.
5. Open the example app again and restore the layout from file.

Expected output: The layout would be restored as much as possible, with windows/widgets from the unavailable screen moved to another available screen.

Actual outcome: The windows/widgets from now unavailable screen are assigned zero width and height, and are hard to find and change back to reasonable size.

[petrmanek]

There has been no response to this bug report for nearly a year now. Can I please get someone to at least triage this, so that we have a timeline for when a fix can be expected? I am also happy to contribute a fix, if desirable. Please let me know. @iamsergio

[iamsergio]

Hi, is this for an open-source app, which one ? If so I'll bump the priority.

Do you know if it happens only with the main window, or also with floating dock-widgets ? IIRC we have code to fix it for floating windows, need do double-check.

[petrmanek]

is this for an open-source app, which one ? If so I'll bump the priority.

This is for Track Lab, a particle physics research software that is currently not open source. However, we are coincidentally planning to transition to open-source development later this year.

Do you know if it happens only with the main window, or also with floating dock-widgets ? IIRC we have code to fix it for floating windows, need do double-check.

Users have reported that this happens in both main windows and floating dock-widgets, however I have personally reproduced this only with main windows. If you wish, I can try to do it again with dock-widgets as well.