Xinerama

[Thomas Themel]

Hi,

I just had a first stab at implementing a Xinerama module as outlined in
Tuomo's 2007-01-17 post[0], see attached mod_xinerama.c.

I get my two screens well enough, but whenever I switch from one to the
other, the non-focused screen "goes blank", ie all windows are unmapped
from it. I take it that this is the standard behaviour for switching
inside an mplex, but couldn't figure out how to prevent it.

Hints?

[0] <http://www.mail-archive.com/ion-general@lists.berlios.de/msg01581.html>

ciao,
-- 
[*Thomas  Themel*] "As the world's richest, most powerful software company,
[extended contact] Microsoft is number one. And you, the millions of
[info provided in] consumers who use our products, are the zeroes."
[*message header*] <http://www.theonion.com/content/node/29130>

/*
 * Ion xinerama module
 */

#include <limits.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Xutil.h>
#include <X11/extensions/Xinerama.h>

#include <libtu/rb.h>

#include <ioncore/common.h>
#include <ioncore/eventh.h>
#include <ioncore/global.h>
#include <ioncore/event.h>
#include <ioncore/mplex.h>
#include <ioncore/xwindow.h>
#include <ioncore/group-ws.h>
#include <ioncore/sizepolicy.h>
#include <ioncore/../version.h>
#include <stdio.h>

char mod_xinerama_ion_api_version[]=ION_API_VERSION;

static int xinerama_event_base;
static int xinerama_error_base;

bool mod_xinerama_init()
{
    WRootWin* rootWin = ioncore_g.rootwins;
    Display* dpy = ioncore_g.dpy;
    int scrNum,nScreens;
    XineramaScreenInfo* sInfo;
    WScreen* new;

    int nRects;
    int i;

    if(XineramaQueryExtension(dpy,&xinerama_event_base, &xinerama_error_base))
    {
        XineramaScreenInfo* sInfo;
        sInfo = XineramaQueryScreens(dpy, &nRects);

        if(!sInfo)
        {
            return FALSE ;
        }
        
        for(i = 0 ; i < nRects ; ++i)
        {
            WFitParams fp;
            WMPlexAttachParams par = MPLEXATTACHPARAMS_INIT;

            WScreen* newScreen;
            WRegion* reg=NULL;
            printf("Rectangle #%d: x=%d y=%d width=%u height=%u\n", 
                   i+1, sInfo[i].x_org, sInfo[i].y_org, sInfo[i].width,
                   sInfo[i].height);

            fp.g.x = sInfo[i].x_org;
            fp.g.y = sInfo[i].y_org;
            fp.g.w = sInfo[i].width;
            fp.g.h = sInfo[i].height;
            fp.mode = REGION_FIT_EXACT;

            par.flags = MPLEX_ATTACH_GEOM|MPLEX_ATTACH_SIZEPOLICY ;
            par.geom = fp.g;
            par.szplcy = SIZEPOLICY_FULL_EXACT;

            newScreen = mplex_do_attach_new(&rootWin->scr.mplex, &par,
                (WRegionCreateFn*)create_screen, NULL);

            if(newScreen == NULL) {
                warn(TR("Unable to create Xinerama workspace %d."), i);
                XFree(sInfo);
                return FALSE;
                }

            newScreen->id = i ;

        }

        XFree(sInfo);
        rootWin->scr.id = -1;
    }




    return TRUE;
}


bool mod_xinerama_deinit()
{
    return TRUE;
}