Ideal screen rotation

[Carsten Haitzler (The Rasterman)]

On Fri, 6 Nov 2009 17:22:27 +0000 Rui Miguel Silva Seabra <rms at 1407.org> said:

> On Fri, Nov 06, 2009 at 04:40:04PM +0100, Helge Hafting wrote:
> > Rui Miguel Silva Seabra wrote:
> > > On Wed, Nov 04, 2009 at 01:55:29PM +0100, Helge Hafting wrote:
> > [...]
> > >> The software that control rotation need to know if the foreground app
> > >> should run in landscape, portrait or auto mode. (And perhaps the 
> > >> upside-down variants as well.)
> > > 
> > > Or, what I think would be the proper way to do it, the application should
> > > broadcast to dbus that it prefers no rotation, or one of the 4 possible
> > > rotation states and omnewrotate could listen to such requests and
> > > not rotate while there is such a message in the bus.
> > 
> > Well, you cannot expect every app to have such preferences, this device
> > runs generic linux apps that aren't made specially for the freerunner. 
> > Now, of course the app loader can do this, similiar to how we already 
> > request the cpu/backlight when launching some apps.
> > 
> > But there is a problem. The user may switch between several apps with
> > different rotation needs. (xmahjongg needs landscape, tetris needs 
> > portrait, ...)  How will omnewrotate be notified about this?
> 
> The proper way is to define a set of DBUS signals.
> 
> Of course conflicting signals need to be ignored.

no. the proper way is to set properties on your window. this is a display
system thing. dbus is orthogonal to it. you set properties. you let the wm
figure out what to do with the active window(s) based on their properties.

-- 
------------- Codito, ergo sum - "I code, therefore I am" --------------
The Rasterman (Carsten Haitzler)    raster at rasterman.com