Window positioning

Thu Jan 4 13:12:58 UTC 2018

Thanks you very much! New to wayland, so a lot to learn.

From: Ucan, Emre (ADITG/ESB) [mailto:eucan at de.adit-jv.com]
Sent: Thursday, January 04, 2018 2:17 AM
To: Han, Guowei <Guowei.Han at johnsonoutdoors.com>; Jasper St. Pierre <jstpierre at mecheye.net>; wayland <wayland-devel at lists.freedesktop.org>
Subject: RE: Window positioning

Hi Han,

In ivi-shell architecture, there are controller plugins which controls the layout of surfaces on the display. The controller plugins are using ivi_layout_interface to do that.
In weston repository, we have hmi-controller plugin which is good for demo purposes. But it is not suitable for production use-cases.

Please check https://github.com/GENIVI/wayland-ivi-extension. There, we have ivi-controller plugin which enables you to control the layout via ivi_wm protocol.
You can use ivi-wm protocol directly in your Window Manager app, or you can use ilmControl library, or you can use LayerManagerControl command line tool to control the layout of surfaces.

Best regards

Emre Ucan
Engineering Software Base (ADITG/ESB)

Tel. +49 5121 49 6937
From: wayland-devel [mailto:wayland-devel-bounces at lists.freedesktop.org] On Behalf Of Han, Guowei
Sent: Mittwoch, 3. Januar 2018 18:39
To: Jasper St. Pierre; wayland
Subject: RE: Window positioning

Thanks for all the help. Will start look into ivi-shell.

From: magcius at gmail.com<mailto:magcius at gmail.com> [mailto:magcius at gmail.com] On Behalf Of Jasper St. Pierre
Sent: Wednesday, January 03, 2018 12:28 PM
To: Han, Guowei <Guowei.Han at johnsonoutdoors.com<mailto:Guowei.Han at johnsonoutdoors.com>>; wayland <wayland-devel at lists.freedesktop.org<mailto:wayland-devel at lists.freedesktop.org>>
Subject: Re: Window positioning

(Please Reply All in the future so that responses go to the mailing list)

Hi Han,

In that case, you should probably use a protocol designed for embedded surface layout, like ivi-shell, rather than xdg-shell. Embedded, static-size display is a very different use case than a modern desktop system which requires hotplug and multimonitor layouts.

On Wed, Jan 3, 2018 at 9:26 AM, Han, Guowei <Guowei.Han at johnsonoutdoors.com<mailto:Guowei.Han at johnsonoutdoors.com>> wrote:
We are not allowing user move position since we are in an embedded system. So that’s not an issue for us. We don’t even have a mouse connected.

From: magcius at gmail.com<mailto:magcius at gmail.com> [mailto:magcius at gmail.com<mailto:magcius at gmail.com>] On Behalf Of Jasper St. Pierre
Sent: Wednesday, January 03, 2018 12:24 PM
To: Han, Guowei <Guowei.Han at johnsonoutdoors.com<mailto:Guowei.Han at johnsonoutdoors.com>>
Cc: Kai-Uwe <ku.b-list at gmx.de<mailto:ku.b-list at gmx.de>>; wayland <wayland-devel at lists.freedesktop.org<mailto:wayland-devel at lists.freedesktop.org>>
Subject: Re: Window positioning

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<mailto: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<mailto: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<mailto: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<mailto: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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