tabbed window feature lost

[rjwse@aol.com]

When I mouse over top row showing File Edit Tool View Search Help and click on one of them, the drop down does not appear, but instead the top one is selected and opened. My editor lost ability to tab FileBrowser, FilePreview, CheckBook, etc. For example, the File Preview will show up and can be moved and resized but cannot be put into a tab. It used to be that a blue-colored background box would appear and I could nudge the selected window into a tabbed entry. The tabs were at the bottom. Did I break something? Or is this feature not available in version 6? Best regards, Pop

[kovidgoyal]

Still works for me, just drag the titlebar of the panel you want tabbed into the middle of the panel you want it tabbed with.

[rjwse@aol.com]

Thanks for quick reply. Something is wrong. I cannot dock. I tried reinstalling latest calibre again. I tried restarting computer. I tried docking when Editor is half screen and when dockable screens are very small. I tried to place both to left and right and top and bottom. I tried removing the full-width Ctrl-F find screen. When I click on the dockable screen the top line of the editor screen is dim. When I click on the editor screen the top line of the dockable screen is dim. When I mouse over top row showing File Edit Tool View Search Help and click on one of them, the drop down does not appear, but instead the top one is selected and opened. I can get the drop-down list for View by means of Alt-V instead of clicking. Best regards, Pop

[kovidgoyal]

This is on what OS? I am guessing this Linux, in which case you will be fine if you switch from Wayland to X11 or set the QT_QPA_PLATFORM=xcb environment variable.

[rjwse@aol.com]

" This is on what OS? I am guessing this Linux, in which case you will be fine if you switch from Wayland to X11 or set the QT_QPA_PLATFORM=xcb environment variable.
__________________"
Thanks for reply. Yes, this is Ubuntu 20.04 May I please ask instructions how to either (1) switch from Wayland to X11 or (2) set the QT_QPA_PLATFORM=xcb environment variable?
Best regards, Pop

[retiredbiker]

Originally Posted by rjwse@aol.com

Thanks for reply. Yes, this is Ubuntu 20.04 May I please ask instructions how to either (1) switch from Wayland to X11 or (2) set the QT_QPA_PLATFORM=xcb environment variable?
Best regards, Pop

Here is a good article to read for this: https://fostips.com/switch-back-xorg-ubuntu-21-04/. Should work for 20.04.

[retiredbiker]

I'm interested in this because I have a small problem editing metadata and I'm also on Ubuntu 20.04. So I thought I'd try Wayland - had never used it before.

Starting Calibre under Wayland - just about everything looks different. It did fix my little editing problem, but broke just about everything else. The editor became unusable, and certainly the docking problem is there. Trying to move the panels around just made an awful mess and then stopped working completely. It was making such a mess I did not try to do much. When I went back to X11, it took quite a while to get things back to normal.

Interested to see what you find, @rjwse.

[rjwse@aol.com]

Thanks for Wayland tip. I am fearful of losing it all and would also like to investigate how to "set the QT_QPA_PLATFORM=xcb environment variable."
Best regards, Pop

[retiredbiker]

Originally Posted by rjwse@aol.com

Thanks for Wayland tip. I am fearful of losing it all and would also like to investigate how to "set the QT_QPA_PLATFORM=xcb environment variable."
Best regards, Pop

Run the command export QT_QPA_PLATFORM=xcb and then start Calibre.

[rjwse@aol.com]

magic! Thank you. That sure works. I will try the x11 next. Best regards, Pop