[Question] Z-order management in Wayland

[Jasper St. Pierre]

Please stop bringing this up in unrelated threads. This is a warning. Do
not do it again.
On Aug 1, 2014 4:10 PM, "Bill Spitzak" <spitzak at gmail.com> wrote:

> On 07/31/2014 07:27 PM, Carsten Haitzler (The Rasterman) wrote:
>
>  The most obvious thing that does not work is drag & drop.
>>>
>>
>> what has that got to do with a click raising or not? dnd is a separate
>> protocol
>> element with its own semantics.
>>
>
> You want to be able to drag out of a window without raising it. Otherwise
> it could raise and obscure the location you wish to drop at. Probably more
> important right now is that this is how Windows and OS/X work for drag &
> drop.
>
> This is not possible if sending the mouse-down (the one that will start
> the drag) raises the source window. It has nothing to do with the dnd
> protocol itself as all this happens before the first dnd request or event.
>
> Windows kludges around this by relying on synchronous operation, since the
> window manager is (in effect) running in a library in the same process. If
> no calls to start drag happen before the event handler for the mouse-down
> returns, it raises the window. This cannot be done on Wayland as it does
> not want to rely on synchronous behavior.
>
> In any case this is going to have to be fixed in xdg_shell. I did not
> realize until I did some more investigation of it how little has been done
> on developing xdg_shell. I suppose clients that use wl_shell can have
> unavoidable raise-on-click.
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>
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