Re: GWorkspace as windowmanager?

[Yen-Ju Chen]

Not sure I understand the problem,
but here is how I get the roow window from GNUstep appplication:

Class xgserver = NSClassFromString(@"XGServer") // Get XGServer class
GSDisplayServer *gsDisplay = GSCurrentServer(); // Get GSDisplayServer 
instance
Display display = [gsDisplay xDisplay]; // X window display
NSArray *screens = [gsDisplay screenList]; // Get screens
unsigned int screenNumber = [[screens objectAtIndex: 0] intValue]; // Get 
first screen number
Window rootWindow = [gsDisplay xDisplayRootWindowForScreen: screenNumber]; 
// Get X window

Then you can use Xwindow function to draw on this root window.
If you want to use GNUstep to draw, this may work (not sure):

gswin = [[NSWindow alloc] init...] // Get NSWindow instance
gswindow_device_t *gsWin = [xgserver _windowWithTag: [gswin windowNumber]];

gsWin->ident is the Xwindow in NSWindow.
Maybe you can reparent the root X window on the gsWin->ident,
then you can use -gui to draw on it.

Most of the methods are not public, so you have to copy the headers from 
-back.

Yen-Ju


> From: Gregory John Casamento <greg_casamento@yahoo.com>
> To: enrico@imago.ro, Armando Di Cianno <armando@nycap.rr.com>
> CC: discuss-gnustep@gnu.org
> Subject: Re: GWorkspace as windowmanager?
> Date: Sat, 12 Jun 2004 04:05:37 -0700 (PDT)
>
>
> --- Enrico Sersale <enrico@imago.ro> wrote:
> > On 2004-06-11 01:59:44 +0300 Armando Di Cianno <armando@nycap.rr.com> 
> wrote:
> >
> > > On 2004-06-10 18:24:30 -0400 Charles Kerr <punt1959@msn.com> wrote:
> > >> I have been using Windowmaker, and like the feel.
> > > ...
> > >> Having both, the workspace seemed to overlap with WindowMaker.
> > >
> > > <snip>
> > > Actually ... is it feasible to have the icons draw right onto the root
> > > window?  I ... *sigh* ... I run xscreensaver's on the root window, 
> e.g.
> > > `/usr/lib/xscreensaver/flurry -root`, and would love the ability for
> > Desktop
> > > to paint the root, but not create a "desktop window" that isn't the 
> actual
> > > root .... and if it just has to be so, Alt-Drag shouldn't be able to 
> move
> > it!
> > > <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.
>
> GJC
>
> =====
> Gregory John Casamento -- CEO/President Open Logic Corp.
> #### Maintainer of Gorm for GNUstep.
>
>
>
>
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