Re: GWorkspace as windowmanager?

[Enrico Sersale]

On 2004-06-12 18:10:27 +0300 Enrico Sersale <enrico@imago.ro> wrote:

> On 2004-06-12 15:03:49 +0300 Enrico Sersale <enrico@imago.ro> wrote:
>
> > On 2004-06-12 14:05:37 +0300 Gregory John Casamento 
> > <greg_casamento@yahoo.com> wrote:
> >
> > > > > <snip>
> > > >
> > > > Is there a way to have a NSWindow which _windowNum is 0, that is, the X 
> > > > root
> > > > window?
> > > > In XGServerWindow we have a -_rootWindowForScreen: method returning a
> > > > gswindow_device_t structure that represents the root window; it is used in
> > > > -window::: to set the root window for all the new windows.
> > > > I've tried to subclass NSWindow to override -_initBackendWindow: and then 
> > > > add
> > > > something in XGServerWindow to setup all the stuff, but I can't because
> > > > -_initBackendWindow: accesses windowmaps, a class variable of NSWindow.
> > >
> > > If you find the answer to this, please let me know as well. InnerSpace.app,
> > > the screensaver in my GAP project, needs to have a window which sits at 
> > > this
> > > level as well.
> >
> > Only a idea...
> >
> > If a window is deferred, NSWindow calls -_initBackendWindow: only in 
> > -orderWindow:relativeTo:.
> > NSDesktopWindowLevel is a GNUstep addition, so, the case of a window that 
> > is deferred *and* which level is NSDesktopWindowLevel could be used to 
> > identify the root window.
> > In this case NSWindow, instead of -_initBackendWindow:, could use a other 
> > method, say "-_initRootBackendWindow:", that, throught a appropiate method 
> > in GSDisplayServer (instead of -window:::, -rootwindow:::, for example), 
> > let the backend class setup the window. (The backend part should be easy to 
> > write, I think).
>
> This seems to work, but I'm getting a "Desktop[9837] X-Windows error - 
> BadAccess (attempt to access private resource denied)" in the new backend 
> method. I'm doing something wrong with some X function. Could somebody a 
> little more expert in X take a look at this? Gregory?

The problem is here:

  XSelectInput(dpy, window->ident, ExposureMask | KeyPressMask |
                                KeyReleaseMask | ButtonPressMask |
                             ButtonReleaseMask | ButtonMotionMask |
                           StructureNotifyMask | PointerMotionMask |
                               EnterWindowMask | LeaveWindowMask |
                               FocusChangeMask | PropertyChangeMask |
                            ColormapChangeMask | KeymapStateMask |
                            VisibilityChangeMask);

Anyway, I can confirm that this works; I'm adding NSViews in the root window 
and drawing in them. The only thing that doesn't work are the events.