/*
 * Display screen configuration as seen by GDK.
 * 
 * Compile with :
 * cc test_display.c -o test_display  `pkg-config --cflags --libs gtk+-3.0`
 *
 */

#include <glib.h>
#include <gtk/gtk.h>

int
main (int argc, char **argv)
{
    gint i, nscreens;
    GdkDisplay *gdisplay;
    GdkScreen  *gscreen;

    gtk_init (&argc, &argv);

    gdisplay = gdk_display_get_default ();
    nscreens = gdk_display_get_n_screens(gdisplay);

    g_print ("Current display has %i screen(s) :\n", nscreens);

    for (i = 0; i < nscreens; i++) 
    {
        GdkRectangle rect;
        GdkRectangle workarea;
        gint j, nmonitors;

        gscreen = gdk_display_get_screen(gdisplay, i);
        nmonitors = gdk_screen_get_n_monitors (gscreen);

        g_print ("  - The screen #%i has %i monitor(s) attached:\n", i, nmonitors);
        for (j = 0; j < nmonitors; j++)
        {
            gdk_screen_get_monitor_geometry (gscreen, j, &rect);
            gdk_screen_get_monitor_workarea (gscreen, j, &workarea);

            g_print ("    * Screen #%i, monitor #%i, (%i, %i) [%i x %i] workarea (%i, %i) [%i x %i]\n",
                      i, j, rect.x, rect.y, rect.width, rect.height, workarea.x, workarea.y, workarea.width, workarea.height);
        }
    }
    return 0;
}