Collaboration on standard Wayland protocol extensions

Martin Graesslin mgraesslin at
Wed Mar 30 06:26:04 UTC 2016

On Tuesday, March 29, 2016 8:14:25 AM CEST Drew DeVault wrote:
> On 2016-03-29 10:25 AM, Martin Graesslin wrote:
> > > - More detailed surface roles (should it be floating, is it a modal,
> > > 
> > >   does it want to draw its own decorations, etc)
> > 
> > Concerning own decoration we have implemented
> > p=kwayland.git&a=blob&h=8bc106c7c42a40f71dad9a884824a7a9899e7b2f&hb=818e32
> > 0bd99867ea9c831edfb68c9671ef7dfc47&f=src
> > %2Fclient%2Fprotocols%2Fserver-decoration.xml
> Excellent. The protocol looks like it'll do just fine.
> > I think especially for compositors like sway that can be very helpful. For
> > Qt we implemented support in our QPT plugin for Plasma. So if sway wants
> > to use it I can give you pointers on how to use it in your own QPT plugin
> > (if you don't have one yet how to create it) and to use it to force
> > QtWayland to not use the client side decorations.
> I would love to see something like that. Can we work on a model that
> would avoid making users install qt to install Sway?

Ah I think there is a small misunderstanding on the QPT plugin. QPT is the Qt 
Platform Theme which is a plugin loaded into Qt applications to adjust it to 
the platform. So to say a standardized way for LD_PRELOAD.

So you would not have to force a toolkit on your users. It's just that when a 
Qt application is used you can provide a plugin to make Qt apps behave better.

> Honestly I'd like
> to just set an environment variable to turn off CSD where possible, for
> both Qt and GTK. I'm still trying to avoid forcing a toolkit on users.

For Qt you can try:

it gets rid of Qt's CSD deco and replaces them by nothing. We have that set in 
our QPT plugin.

And yeah, in general it would be nice to have the toolkits implement this 
protocol. We didn't go for that yet as we had a release schedule mismatch 
between Plasma and Qt.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 181 bytes
Desc: This is a digitally signed message part.
URL: <>

More information about the wayland-devel mailing list