ButtonRelease event when focus changed

[Carsten Haitzler]

On Mon, 03 May 2021 11:10:50 +0300 Rokas Kupstys <rokupstys at gmail.com> said:

> Hmm i wonder if i can really do this. It goes something like this:
> 
> ButtonPress                          // sent to original window
> MotionNotify                         // drag operation leaves window and
> creates a new window under mouse cursor XUngrabPointer
> XSendEvent(_NET_WM_MOVERESIZE_MOVE)  // initiated drag on newly created window
> // At this point mouse button is down and we are dragging a newly created
> window // Releasing mouse button stops drag operation
> 
> If i understand correctly, i should XGrabPointer() newly created window 
> at this point, to get ButtonRelease event when drag operation ends, 
> right? Doing so breaks drag operation though, as it confines mouse 
> pointer movement to new window and breaks drag operation.

well move events are reported for the new window and not the old, so you need
to switch your logic to continue the drag with the new window id in mind...

> -- Rokas Kupstys
> 
> On 2021-05-01 15:04, Carsten Haitzler wrote:
> > On Fri, 30 Apr 2021 15:05:35 +0300 Rokas Kupstys <rokupstys at gmail.com> said:
> >
> > in x, a button press implicitly grabs the mouse to that window you pressed
> > on. that's why you can press, drag out of the window far away and release
> > the mouse and the original window gets the motion events outside of the
> > window and the release.
> >
> > what you need to do is ungrab the mouse pointer to release this implicit
> > grab. you will no longer have this implicit grab and you won't get the
> > above "get mouse moves + release when pointer is outside of the window".
> > you can now instead grab the pointer to the new target window to lock it in
> > there for events like the implicit grabs above to get the kind of behaviour
> > your probably expect.
> >
> >> Hello,
> >>
> >> I am in this situation where i perform a drag operation which creates a
> >> new window under mouse cursor and starts moving it _NET_WM_MOVERESIZE
> >> atom, all without releasing mouse button. Problem is that neither window
> >> receives ButtonRelease event once drag operation is done, and
> >> application is stuck in a state where it thinks that left mouse button
> >> is still pressed. I am trying to fix this in GLFW. From my tests it
> >> seems that SDL does not have this problem and would send ButtonRlease
> >> event to newly focused window. I can not quite figure out how to enable
> >> this behavior though. Would anyone please advice what to do to make
> >> ButtonRelease always be sent to focused window, even if that window was
> >> not the one who received ButtonPress?
> >>
> >> Thanks!
> >>
> >> -- 
> >> -- Rokas Kupstys
> >>
> >> _______________________________________________
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> >>
> >


-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
Carsten Haitzler - raster at rasterman.com