335646 - Drag and Drop of tree plus/minus symbol shouldn't be possible

Status: NEW

(Thunderbird :: Mail Window Front End, defect)

Description

[Oliver Klee]

Steps to reproduce:
1. In the 3-pane window, click on the +/- icon of a node (with children) in the mail folder tree. Hold the mouse button down.
2. Move the mouse a bit.

Expected results:
The tree opens or closes. The mouse cursor does not change.

Actual results:
The tree doesn't open or close. Instead, the mouse cursor changes to a drag and drop cursor, and the folder will be moved to a different location.

This is a usability and practically a dataloss issue because (in my case) I have drag-and-dropped a folder to another folder (which does not open, which is a different issue) and than had to search for the lost folder. This has happened to me several times.

I suppose this has to do with the fact that my a bit aged computer (Athlon 1.4 GHz) doesn't allow TB to process the clicks quickly enough so that TB sometimes detects a click-and-move where there is none. Or maybe I just have shaky hands when clicking. Who knows.

Comment 1

[Wayne Mery (:wsmwk)]

can you reproduce what is described?

Comment 2

[Vincent Vinet]

I was able to reproduce this, with one additionnal step, though.

--facts--

1. Click on an item to select it
2. Click and hold the mouse on the + or -
3. Drag

This allows me to use the same behavior than the usual drag on an item, but is triggered by dragging on the + or -.

This does NOT happen for me when the item is not selected.




-- thoughts (feel free to ignore ;) ) --
Since the expand/collapse action happens on mouse up behavior, and since the drag behavior can be triggered from anywhere withing the selected item's line, any movement on the mouse during a click on the +/- will be trapped by the drag behavior instead of the expand/collapse behavior. 

Simple fixes could be to either prevent drag events starting from the +/- region or trapping the mouse down event on that area, I guess.

Comment 3

[Bogdan Costea]

Well, Vincent is right, this issue reproduced right away.

If any of the items is selected the cursor turns into a drag and drop cursor and it actually does drag and drop.

If no item is selected, nothing happens, not even item collapse/expand.

Please see video at http://www.gridpulse.com/tbtest/tb_test_335646.swf.

Regards,
Bogdan

Comment 4

[Wayne Mery (:wsmwk)]

This is seriously weird. See this on windows current trunk, and may be worse than described. 

click any folder A to select it. Then left click on the expander widget and drag and drop the widget to some other folder - what it does is drag folder A.  

It will also drag and account - I didn't attempt to drop it for fear of what it might do.

see this on Mac?

Comment 5

[Gary Kwong [:gkw] [:nth10sd] (NOT official MoCo now)]

(In reply to comment #4)
> see this on Mac?

Well, I see some goofiness and even a null crash at objc_assign_strongCast when I tried playing around with dragging and dropping stuff, but not when I tried exactly reproducing the STR above. Inconclusive from me.

Comment 6

[Wayne Mery (:wsmwk)]

Gary comment #5
> (In reply to comment #4)
> > see this on Mac?
> 
> Well, I see some goofiness and even a null crash at objc_assign_strongCast when
> I tried playing around with dragging and dropping stuff, 

Gary, did you file a bug?

Do we send this to widgets?