[PATCH v2] shell: moving drag surface refine

[Juan Zhao]

Thanks for your reply, I will refine it, I still have some questions. :)

On Thu, 2012-08-02 at 12:01 -0400, Kristian Høgsberg wrote:
> > @@ -1669,7 +1669,10 @@ update_outputs(struct drm_compositor *ec,
> struct udev_device *drm_device)
> >               }
> >       }
> >  
> > -     /* FIXME: handle zero outputs, without terminating */   
> > +     ec->base.shell_interface.reconf_active_regions(
> >
> +                                     ec->base.shell_interface.shell);
> > +
> 
> Let's use a wl_signal for this.  Outputs changing is an event
> generated by the core compositor, and there may many places that want
> to do something when that happens.  Put a struct wl_signal
> outputs_signal in weston_compositor and emit it whenever the list of
> outputs, their resolution or position changes.  Let's also add an
> output_region region in weston_compositor.h that we keep up to date
> with then union of all output->regions.  Rebuild it before emitting
> the outputs_signal.
> 
My first question is about how to grap "Output changing", currently, in
drm backend, we listen to udev events and grab the changing, how would
it work in X11, android backend, and generalize one interface in
compositor.c.

Generate a new file, providing APIs and handling all the "Output
changing" issues?

Thanks,
Juan

>