ButtonRelease event when focus changed

[Rokas Kupstys]

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.

-- 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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