C++ GDK_X11_SCREEN函數代碼示例

/**
 * gdk_x11_screen_get_window_manager_name:
 * @screen: a #GdkScreen
 *
 * Returns the name of the window manager for @screen.
 *
 * Return value: the name of the window manager screen @screen, or
 * "unknown" if the window manager is unknown. The string is owned by GDK
 * and should not be freed.
 *
 * Since: 2.2
 **/
const char*
gdk_x11_screen_get_window_manager_name (GdkScreen *screen)
{
  GdkX11Screen *x11_screen;
  GdkDisplay *display;

  x11_screen = GDK_X11_SCREEN (screen);
  display = x11_screen->display;

  if (!G_LIKELY (GDK_X11_DISPLAY (display)->trusted_client))
    return x11_screen->window_manager_name;

  fetch_net_wm_check_window (screen);

  if (x11_screen->need_refetch_wm_name)
    {
      /* Get the name of the window manager */
      x11_screen->need_refetch_wm_name = FALSE;

      g_free (x11_screen->window_manager_name);
      x11_screen->window_manager_name = g_strdup ("unknown");

      if (x11_screen->wmspec_check_window != None)
        {
          Atom type;
          gint format;
          gulong n_items;
          gulong bytes_after;
          gchar *name;

          name = NULL;

          gdk_x11_display_error_trap_push (display);

          XGetWindowProperty (GDK_DISPLAY_XDISPLAY (display),
                              x11_screen->wmspec_check_window,
                              gdk_x11_get_xatom_by_name_for_display (display,
                                                                     "_NET_WM_NAME"),
                              0, G_MAXLONG, False,
                              gdk_x11_get_xatom_by_name_for_display (display,
                                                                     "UTF8_STRING"),
                              &type, &format,
                              &n_items, &bytes_after,
                              (guchar **)&name);

          gdk_x11_display_error_trap_pop_ignored (display);

          if (name != NULL)
            {
              g_free (x11_screen->window_manager_name);
              x11_screen->window_manager_name = g_strdup (name);
              XFree (name);
            }
        }
    }

  return GDK_X11_SCREEN (screen)->window_manager_name;
}

static gint
gdk_x11_screen_get_height_mm (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);

  return HeightMMOfScreen (GDK_X11_SCREEN (screen)->xscreen);
}

static GdkDisplay *
gdk_x11_screen_get_display (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);

  return GDK_X11_SCREEN (screen)->display;
}

static gint
gdk_x11_screen_get_n_monitors (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);

  return GDK_X11_SCREEN (screen)->n_monitors;
}

static GdkWindow *
gdk_x11_screen_get_root_window (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);

  return GDK_X11_SCREEN (screen)->root_window;
}

static gint
gdk_x11_screen_get_width (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);

  return WidthOfScreen (GDK_X11_SCREEN (screen)->xscreen);
}

static gint
gdk_x11_screen_get_primary_monitor (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), 0);

  return GDK_X11_SCREEN (screen)->primary_monitor;
}

GdkScreen *
_gdk_x11_screen_new (GdkDisplay *display,
		     gint	 screen_number) 
{
  GdkScreen *screen;
  GdkX11Screen *x11_screen;
  GdkX11Display *display_x11 = GDK_X11_DISPLAY (display);

  screen = g_object_new (GDK_TYPE_X11_SCREEN, NULL);

  x11_screen = GDK_X11_SCREEN (screen);
  x11_screen->display = display;
  x11_screen->xdisplay = display_x11->xdisplay;
  x11_screen->xscreen = ScreenOfDisplay (display_x11->xdisplay, screen_number);
  x11_screen->screen_num = screen_number;
  x11_screen->xroot_window = RootWindow (display_x11->xdisplay,screen_number);
  x11_screen->wmspec_check_window = None;
  /* we want this to be always non-null */
  x11_screen->window_manager_name = g_strdup ("unknown");
  
  init_multihead (screen);
  init_randr_support (screen);
  
  _gdk_x11_screen_init_visuals (screen);
  _gdk_x11_screen_init_root_window (screen);
  
  return screen;
}

static gboolean
gdk_x11_screen_is_composited (GdkScreen *screen)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);

  return x11_screen->is_composited;
}

static GdkVisual *
gdk_x11_screen_get_rgba_visual (GdkScreen *screen)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);

  return x11_screen->rgba_visual;
}

static void
update_bounding_box (GdkScreen *screen)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
  GdkX11Display *x11_display = GDK_X11_DISPLAY (x11_screen->display);
  gint i, x1, y1, x2, y2;

  x1 = y1 = G_MAXINT;
  x2 = y2 = G_MININT;

  for (i = 0; i < x11_display->monitors->len; i++)
    {
      GdkX11Monitor *monitor = x11_display->monitors->pdata[i];
      GdkRectangle geometry;

      gdk_monitor_get_geometry (GDK_MONITOR (monitor), &geometry);
      x1 = MIN (x1, geometry.x);
      y1 = MIN (y1, geometry.y);
      x2 = MAX (x2, geometry.x + geometry.width);
      y2 = MAX (y2, geometry.y + geometry.height);
    }

  x11_screen->width = x2 - x1;
  x11_screen->height = y2 - y1;
}

static void
process_monitors_change (GdkScreen *screen)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
  gint		 n_monitors;
  gint		 primary_monitor;
  GdkX11Monitor	*monitors;
  gboolean changed;

  primary_monitor = x11_screen->primary_monitor;
  n_monitors = x11_screen->n_monitors;
  monitors = x11_screen->monitors;

  x11_screen->n_monitors = 0;
  x11_screen->monitors = NULL;

  init_multihead (screen);

  changed =
    !compare_monitors (monitors, n_monitors,
		       x11_screen->monitors, x11_screen->n_monitors) ||
    x11_screen->primary_monitor != primary_monitor;


  free_monitors (monitors, n_monitors);

  if (changed)
    g_signal_emit_by_name (screen, "monitors-changed");
}

static guint32
get_netwm_cardinal_property (GdkScreen   *screen,
                             const gchar *name)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
  GdkAtom atom;
  guint32 prop = 0;
  Atom type;
  gint format;
  gulong nitems;
  gulong bytes_after;
  guchar *data;

  atom = gdk_atom_intern_static_string (name);

  if (!gdk_x11_screen_supports_net_wm_hint (screen, atom))
    return 0;

  XGetWindowProperty (x11_screen->xdisplay,
                      x11_screen->xroot_window,
                      gdk_x11_get_xatom_by_name_for_display (GDK_SCREEN_DISPLAY (screen), name),
                      0, G_MAXLONG,
                      False, XA_CARDINAL, &type, &format, &nitems,
                      &bytes_after, &data);
  if (type == XA_CARDINAL)
    {
      prop = *(gulong *)data;
      XFree (data);
    }

  return prop;
}

static gboolean
gdk_x11_screen_get_setting (GdkScreen   *screen,
			    const gchar *name,
			    GValue      *value)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (screen);
  const GValue *setting;

  if (x11_screen->xsettings == NULL)
    goto out;
  setting = g_hash_table_lookup (x11_screen->xsettings, name);
  if (setting == NULL)
    goto out;

  if (!g_value_transform (setting, value))
    {
      g_warning ("Cannot transform xsetting %s of type %s to type %s\n",
		 name,
		 g_type_name (G_VALUE_TYPE (setting)),
		 g_type_name (G_VALUE_TYPE (value)));
      goto out;
    }

  return TRUE;

 out:
  return _gdk_x11_get_xft_setting (screen, name, value);
}

static void
gdk_x11_screen_dispose (GObject *object)
{
  GdkX11Screen *x11_screen = GDK_X11_SCREEN (object);
  int i;

  for (i = 0; i < 32; ++i)
    {
      if (x11_screen->subwindow_gcs[i])
        {
          XFreeGC (x11_screen->xdisplay, x11_screen->subwindow_gcs[i]);
          x11_screen->subwindow_gcs[i] = 0;
        }
    }

  _gdk_x11_xsettings_finish (x11_screen);

  if (x11_screen->root_window)
    _gdk_window_destroy (x11_screen->root_window, TRUE);

  for (i = 0; i < x11_screen->nvisuals; i++)
    g_object_run_dispose (G_OBJECT (x11_screen->visuals[i]));

  G_OBJECT_CLASS (gdk_x11_screen_parent_class)->dispose (object);

  x11_screen->xdisplay = NULL;
  x11_screen->xscreen = NULL;
  x11_screen->screen_num = -1;
  x11_screen->xroot_window = None;
  x11_screen->wmspec_check_window = None;
}