1941171 - Selecting multiple messages on message list pane is not working properly.

Status: RESOLVED FIXED

(Thunderbird :: Folder and Message Lists, defect, P3)

Description

[Arthur Asher]

Attachment: Screen Recording 2025-01-11 222719.gif

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Steps to reproduce:

Holding down the CTRL and left-clicking the messages I want to delete (or move, etc.), then after selecting a number of messages, the previously selected messages become unselected, as though I lifted my finger off the CTRL key. (I didn't).

The problem was discussed in:
https://support.mozilla.org/en-US/questions/1454403#answer-1702830
without a workable resolution in my case.

Actual results:

I have tried doing the same process in other programs, i.e., choosing lines of text in LibreOffice and multiple files in the search program, Everything without the problem. On my HP laptop, I only have one CTRL key, so I could not try the other (fingerprint in the right-hand location). I will try to remap my right ALT key to CTRL and see what happens and report back. I cleaned the key contacts as best possible. SEE ATTACHED .GIF FILE.

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Thunderbird/128.6.0

User Agent : Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:134.0) Gecko/20100101 Firefox/134.0

Expected results:

Not have the previously selected messages become unselected

Comment 1

[Corey Bryant]

I was able to recreate this but I'm not sure if it is the same reproducer as the reported issue.
If I hold down CTRL and left-click several messages, they are selected as expected. If, when I'm left-clicking and selecting a message, I drag across the message slightly while holding the left-click (as if selecting and dragging that message), it will reset the selected messages.

Comment 2

[Corey Bryant]

Attachment: 5th message dragged causes reset

Comment 3

[Corey Bryant]

Arthur, let us know if comment 1 is what needs to occur in your situation to recreate this bug.

Comment 4

[Arthur Asher]

Corey,
Yes, this seems to be the same. The number of messages that cause the reset changes depending on when the drag occurs.
I tried experimenting by not holding the mouse when left-clicking and was able to get to 23 selected before I must have slightly moved the mouse.
My mouse is set at 1000 dpi. I set it both higher and lower, it did better at the lower and worse at the higher.
I then turned my touchpad (it's a laptop) and used the left-click area/button on that. NO PROBLEM!
So what you determined to be the problem to be is correct. The minute movement of the mouse, while performing the CTRL left-click, gets interpreted as a drag and thus the reset.
I have no idea as to which update caused this to start happening, maybe sometime in the last 6 months.
Art

Comment 5

[Hartmut Welpmann [:welpy-cw]]

Attachment: Bug 1941171 - Prevent messages from being dragged when they are selected with Ctrl or Shift. r=aleca,freaktechnik

Comment 6

[Corey Bryant]

Removing tracking since there is a patch up (Thanks Hartmut).

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/751fff553b57
Prevent messages from being dragged when they are selected with Ctrl or Shift. r=aleca,freaktechnik

Comment 8

[Geoff Lankow (:darktrojan)]

This broke mail/components/addrbook/test/browser/browser_contact_sidebar.js. Presumably something to do with the focus changes.

I backed it out:
https://hg.mozilla.org/comm-central/rev/e234995d1410a4bd62b53ba6b563bec8caef857f

Comment 9

[Hartmut Welpmann [:welpy-cw]]

Try

Comment 10

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/comm-central/rev/abf8080ac806
Prevent messages from being dragged when they are selected with Ctrl or Shift. r=aleca,freaktechnik