Shift + Left-Mouse Click to select multiple epubs Fails

[kovidgoyal]

Actually, I think I can simply re-implement shift click in calibre to override Qt. From looking at the code, I already do that for the cover grid, so if you can confirm that it is working there, I will do something similar for the book list.

[jbacelar]

In the cover grid it works perfectly.

[jbacelar]

I have just updated W 10 pro 64 to 1909, and it seems that the problem has disappeared in the books list.

[Frizzell]

Originally Posted by kovidgoyal

I cannot reproduce it and without being able to reproduce it there isn't a hope in hell of my being able to fix it, since as BR points out it would need to be a workaround, as Calibre does not manage clicks and selections, Qt does.

Out of curiosity does this happen only in the book list? Does it happen in the cover grid? The editor while selecting text?

---------
Kovid,

I just tried selecting multiple covers several times in the 'Cover Grid' and it works perfectly every single time. Well, that narrows it down to only occurring in 'Book List' view anyway.

This is the first time in all the years I've been using Calibre, that I have ever experienced a bug on my end, and it looks like when I finally do, it's a real doozy. LOL

[Frizzell]

It is now 11:05EST, and so far the 'Book List' view is allowing me to successfully select multiple books once again, using the Shift + Left Mouse Click.

I just got to thinking when 'jbacelar' said the problem went away when he brought Windows 10 up to version 1909... I remember that my Windows 10 updated itself almost exactly the same time that this problem began.

Is it possible that Microsoft's updates is the culprit?

[icallaci]

I see it intermittently also, in the book list. Mostly when I've just added new books to the library and want to select them to add to my reading list. Since the last book added is already highlighted, I press Shift-left click to select the rest of the books just added, but most of the time this fails. If I click somewhere off the list, then try again, it works.

[kovidgoyal]

Well I have added my own implementation, verriding Qt', hopefully it does the trick. https://github.com/kovidgoyal/calibr...ddaaa714a7cf0c

[BetterRed]

Originally Posted by Frizzell

Is it possible that Microsoft's updates is the culprit?

Only if Shift+Left Click does not work to select a range in other applications.

If it's only a problem in calibre then its a calibre problem - or to be precise a Qt problem, which Kovid has hopefully fixed by rolling his own Shift+Left Click handler

BR

[crane3]

The left-shift problem happened to me also when I tried to update 2 pages of the book list to the chromebook. However, was able to do a "left shift & up/down arrow on the keyboard to select the books.

Then a win10 happened a couple of days ago & I did the left-shift & left-mouse click & got the 4 books list selected. So everything is now "normal" after win10 update!? Didn't get any nothing happened when doing the left-shift-click from "my" kindle lib to add some books to Calibre.

Really hate it when a problem is in the OS change & looks unrelated to the application problem....

[DNSB]

I see the issue on Windows 10 1903, 1909 and 2004 (Insider Preview build) running in VMs and 1909 running as a physical machine (host for the VMs). The lovely part is that it is not consistent which makes it a pain to track down.