Window positioning

[Jasper St. Pierre]

Hi Han,

Allowing yourselves to place multiple windows where you want it then isn't
going to solve that problem, since users can still drag them around,
minimize them, etc. Multiprocess rendering is a bit tricksy, and there's no
standardized way to do it right now. The traditional technique is to build
your own Wayland compositor inside your application, which is a bit
heavyweight, and then use wl_subsurface to composite the results. This is
what e.g. WebKit2's architecture does, and it's something I've tried to
implement in the past [0]. As the scope of a Wayland compositor becomes
larger and larger over time, I think this is starting to become a bit
impractical. It might be worth looking into a multi-process buffer-sharing
protocol as a Wayland extension, since it's a use case that keeps coming up.

[0] https://github.com/magcius/wakefield

On Wed, Jan 3, 2018 at 5:23 AM, Han, Guowei <Guowei.Han at johnsonoutdoors.com>
wrote:

> We are running a multi process application. And GUI is act as a
> transparent top layer. All other process rendering by them self underneath.
> So its important for other process to place the window at right potion.
>
> Sent from my iPhone
>
> On Jan 3, 2018, at 2:58 AM, Kai-Uwe <ku.b-list at gmx.de> wrote:
>
> Maybe you are after a full screen application then. With that you should
> be able to decide about the positioning on the whole output.
> Am 03.01.2018 um 02:37 schrieb Han, Guowei:
>
> Thanks Jasper. Do u know if there's a demo i can learn from? Currently i
> am creating a bigger surface bigger than screen size. and make subsurface
> so i can posion them as i want. Really don't think its a good way to do it.
>
> Sent from my iPhone
>
> On Jan 2, 2018, at 4:25 PM, Jasper St. Pierre <jstpierre at mecheye.net>
> wrote:
>
> *EXTERNAL EMAIL*
>
> Hi Han,
>
> You cannot position surfaces absolutely using the traditional xdg-shell
> protocol. However, for embedded cases, there are protocols like ivi-shell
> which provide that functionality.
>
> On Fri, Dec 29, 2017 at 10:09 AM, Han, Guowei <Guowei.Han at johnsonoutdoors.
> com> wrote:
>
>> Hi,
>>
>>
>>
>> Wonder if there’s a way we can position window to anywhere we want using
>> wayland or maybe weston?
>>
>>
>>
>> Thanks,
>>
>>
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>
>
> --
>   Jasper
>
>
>
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-- 
  Jasper
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