Re: FVWM: Possible bug: Jumping pointer in Darktable

I'll be offline for the rest of today (8h driving, yay), so no need to
hurry...

Dan Espen (2018-Nov-07, excerpt):
> >> FvwmCommand 'mouse 1 A 4 Beep'
[...]
> Fvwm should only Beep when the modifier key is held down.

That's what it does, sorry, should have been more clear about this.

> So, maybe I'm not doing the right thing to see the problem.
> I've opened darktable,

btw. which Version?  I'm using the master branch, i.e., last time I've
checked out was

    $ darktable --version
    this is darktable 2.5.0+767~gabecd987b

> let it import some images, then I double click
> on one of them.  I then click on the pencil to the left of the image

Hmm, that would be under "mask manager"?

> and I draw a circle on the image.  Then I can use mouse 1 to move
> the circle around.   The circle moves smoothly and the mouse pointer
> doesn't jump around.

I've just tried and can observe the error when dragging line sections
created with the pencil.  Also when creating a circle with the circle
tool (next to the pencil) and dragging that: jumps.  Interestingly,
when dragging *nodes* of the line segment created with the pencil, the
error does not show up.

Honestly, I'm not convinced that this is entirely FVWMs fault...

> I'm not really familiar with Fvwm key binding matching code but I'm
> willing to look.  But first I think I need to be able to create
> the problem.

Yeah, totally agree.  maybe it's a quirk in my setup but I would not
know where to look.  I think I'll try `git bisect` on this to see when
the bug was introduced.  Not before Friday...

Thanks
Stefan


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