1870573 - Briefly dragging over a collapsed folder might expand it after leaving the folder pane.

Status: RESOLVED FIXED

(Thunderbird :: Folder and Message Lists, defect)

Description

[webmaster2]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:120.0) Gecko/20100101 Firefox/120.0

Steps to reproduce:

I dragged a message quickly over the folder pane, and then quickly back into the message list pane. I have a large number of message folders and subfolders in the folder pane.

Actual results:

A random folder will open and stay open. It always happens. Note, I am not hesitating whatsoever with the mouse in the folder pane... just moving quickly over the folder pane, and then quickly back to the message list pane. At that point, I hold the dragged message there, and in a second, a random folder will open.

Expected results:

No folder should have opened.

Comment 1

[webmaster2]

I just found another manifestation of this same bug.

I dragged a photo from my Mac desktop to a new, blank email message in Thunderbird, passing over the Thunderbird folder pane. When I dropped the image into the email, shortly thereafter (about 1 or 2 sec), a random folder opens in the folder pane. This happens every time. It also happens even if I drag very quickly (less than 1 sec over the folder pane).

I then did a test where I covered the folder pane with the new email message, and dragged the photo as before. This time a random folder did not open.

Comment 2

[Wayne Mery (:wsmwk)]

So bug 1863845 which set the delay to 1 second was not enough.

Perhaps recently fixed bug 1873101 will help. It is not yet on beta nor 115.

Comment 3

[Wayne Mery (:wsmwk)]

Please check 115.8.0 later next week.

Comment 4

[pwilly]

Just tested the latest daily build and the very issue remains.

We still can't use Thunderbird Supernova as it causes (delayed) havoc with opening folders when dragging emails outside the Thunderbird window on Windows. The issue is still the very same as described in bug 1863845. Here the description again with same additions to make it more clear:

We use Thunderbird to drag and drop emails to another app for processing .eml files with this setup:

• Wide screen monitor.
• Thunderbird aligned on the right side of the monitor.
• Drag and drop an email across the folder pane to the left side, outside the Thunderbird window onto the Windows desktop or another app.
• Of course you have to drag briefly over a collapsed folder to make it expand. That folder will expand after 1 second.

In Thunderbird 102 you could just briefly drag over any folder and nothing happened. We do this for years, works perfectly.

In Thunderbird 115 that folder always opens even if you just very briefly drag over it (which you have to in order to get to the desktop or another app). Makes 115 unusable for us. We had to reverted back to 102.

Comment 5

[webmaster2]

Please check 115.8.0 later next week.

OK. But Thunderbird is not notifying me when an update is available. I have this setting turned on, "Check for updates, but let me choose whether to install them".

I mentioned my observations in bug 1819617

Comment 6

[webmaster2]

I have confirmed that 115.8.0 does not fix this bug. Mac version.

Side note... I may possibly be missing the update notifications that pop-up in upper right of my Mac screen, because they look exactly like the Firefox update notifications, and I close them without noticing. I think it happened just now today. Would be helpful to have the logos in the update notifications.

Comment 8

[Wayne Mery (:wsmwk)]

Vlad, can you reproduce this?

Comment 9

[Ramona Gavrilescu]

Hello,
I have tried to reproduce this issue using 115.10.2(20240426204036), 125.0b2(20240325163039), 126.0b2( 20240429201016) on MAC 14.4.1 using the information from the Description but did not manage to reproduce it.

Comment 10

[webmaster2]

I was just able to reproduce it again, 115.10.1 on Mac.

I noticed that the folder that spontaneously opens is opposite the message that I am dragging (I explain below).

Here's a detailed description of how to reproduce:

Note: What I referred to above as the "message list pane" is the message list, on the right side. The folder pane is on the left side. The message pane is de-selected in the layout.

First, you need a lot of messages showing in the message list, for example in the Inbox. And you need a lot of folders in the folder pane. How much is a lot? I have a 24" monitor, and both the folder pane and the message list are filling the screen to the bottom and beyond.

You also need to have sub-folders in all/most of the folders in the folder pane. So, you will see the ">" to the left of the folders.

When I say, "opposite" what I mean is, let's say you have a message, Subject "This is a test", in the message list. Let's say this message is 30 messages down in the list.

Directly opposite "This is a test", in the folder pane, there is a folder called "Messages from the Anunnaki", with sub-folders. Like this...

   • • •
> Messages from the Anunnaki             |            This is a test
   • • •

Now, grab and drag the message, "This is a test". Drag it left, over into the folder pane, without releasing it. Keep holding and move it into the folder pane, and down, and then back up, passing directly over the folder, "Messages from the Anunnaki", and then back over into the message list, and release into its original position.

The folder, "Messages from the Anunnaki" will open spontaneously, when the message is brought over from the folder pane, back into the message list, but before it is released into it's original position in the message list.

You can see a different effect if you instead bring the message back over from the folder pane to the message list, passing over a different folder, below "Messages from the Anunnaki". In other words, whichever folder is the last one "touched" by the mouse movement, that will be the one that spontaneously opens.

good luck!

Comment 11

[webmaster2]

More...

The timing of the dragging and releasing is important. Another way to look at this is, hovering the message over it's original position in the message list will cause the folder (w/ sub-folders) in the corresponding vertical position in the folder pane, to open. But, in order to see this, you must first drag the message over into the folder pane and then back into the message list. So, the software seems to be only keying off the vertical position of the mouse pointer, not the horizontal position.

Comment 12

[pwilly]

Confirmed! Instead of dragging back to the message list you can also:

• Drag out the message of the Thunderbird window to the (Windows) desktop. Then the last hovered folder opens as well. Was complaining about this already with detailed description in Bug 1863845.

Thanks for finally reproducing this!

Comment 13

[Hartmut Welpmann [:welpy-cw]]

I'm a bit hesitant to mark this as duplicate, but this may have the same cause as bug 1840484.

Comment 14

[Hartmut Welpmann [:welpy-cw]]

Please see bug 1840484 for a possible solution.

Comment 15

[Hartmut Welpmann [:welpy-cw]]

This should be fixed now as well by bug 1840484.