[Libreoffice-bugs] [Bug 119233] New: Trackpad click handling very slow on MacOS, leads to randomly moving objects in Draw

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=119233

            Bug ID: 119233
           Summary: Trackpad click handling very slow on MacOS, leads to
                    randomly moving objects in Draw
           Product: LibreOffice
           Version: 5.2.6.2 release
          Hardware: x86 (IA32)
                OS: Mac OS X (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Draw
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: ken.shirriff at gmail.com

Description:
When I click on an object to select it and then move the cursor after
releasing, Draw often acts as if I was still holding the object, moving it
unexpectedly. I need to wait a while after selecting an object before I can
move the cursor to give LibreOffice time to deal with the click.

Steps to Reproduce:
1. Using the trackpad, click and release on an object to select it
2. Move cursor using trackpad, immediately after the previous step

Actual Results:
The object is selected and dragged. I then need to move the object back to
where it was, which is annoying.

This is also laggy, happening about 1/3 second after I move the cursor.

Expected Results:
The object is selected, then the cursor moves without moving the object. This
is the behavior I get if I do things slooowly.


Reproducible: Sometimes


User Profile Reset: Yes



Additional Info:
If I wait a long time (> .5 second) between the release and the cursor move, it
works correctly. But with normal trackpad usage I usually get the bad behavior.
I have a clear gap between the release and the move when I see the problem; I'm
definitely not starting the move before I unclick. I want to emphasize that I'm
not doing crazy speed demon moves with the trackpad, just using it at a normal
pace as with any other program.

It seems like LibreOffice is slow in processing mouse events. I suspect that it
is processing the drag event before the unclick event even though the drag
happens afterwards.

This happens with OpenGL disabled or enabled.

Version: 5.2.6.2
Build ID: a3100ed2409ebf1c212f5048fbe377c281438fdc
CPU Threads: 4; OS Version: Mac OS X 10.13.6; UI Render: GL; 
Locale: en-US (en_US.UTF-8); Calc: group

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