util/magnifier.c

   1 #include <popt.h>
   2 #include <gdk/gdkwindow.h>
   3 #include <libbonobo.h>
   4 #include "magnifier.h"
   5 #include "mag_image.h"
   6
   7 #define ENV_STRING_MAX_SIZE 128
   8
   9 /*
  10  * Our parent GObject type
  11  */
  12 #define PARENT_TYPE BONOBO_OBJECT_TYPE
  13
  14 struct sockaddr_un mag_server = { AF_UNIX ,  "/tmp/magnifier_socket" };
  15
  16 typedef struct {
  17         gchar *target_display;
  18         gchar *source_display;
  19         int   vertical_split;
  20         int   horizontal_split;
  21         int   dual_head;
  22         int   fullscreen;
  23         int   mouse_follow;
  24         int   invert_image;
  25         float zoom_factor;
  26         int   min_refresh_time;
  27         int   no_bonobo;
  28         int   fast_cmap_convert;
  29         int   no_initial_region;
  30 } MagnifierOptions;
  31
  32 static MagnifierOptions global_options = { ":0.0",
  33                                            ":0.0",
  34                                            0,
  35                                            0,
  36                                            0,
  37                                            0,
  38                                            0,
  39                                            0,
  40                                            2.0,
  41                                            200,
  42                                            0,
  43                                            0,
  44                                            0
  45                                          };
  46
  47 struct poptOption magnifier_options [] = {
  48         {"target_display", 't', POPT_ARG_STRING, &global_options.target_display, 't', "specify display on which to show magnified view", NULL},
  49         {"source_display", 's', POPT_ARG_STRING, &global_options.source_display, 's', "specify display to magnify", NULL},
  50         {"vertical", 'v', POPT_ARG_NONE, &global_options.vertical_split, 'v', "split screen vertically (if target display = source display)", NULL},
  51         {"horizontal", 'h', POPT_ARG_NONE, &global_options.horizontal_split, 'h', "split screen horizontally (if target display = source display)", NULL},
  52         {"dual-head", 'd', POPT_ARG_NONE, &global_options.dual_head, 'd', "dual-head display mode (maps magnifier to second display)", NULL},
  53         {"mouse follow", 'm', POPT_ARG_NONE, &global_options.mouse_follow, 'm', "track mouse movements", NULL},
  54         {"refresh time", 'r', POPT_ARG_NONE, &global_options.min_refresh_time, 'r', "minimum refresh time for mouse follow and idle, in ms", NULL},
  55         {"zoom (scale) factor", 'z', POPT_ARG_FLOAT, &global_options.zoom_factor, 'z', "zoom (scale) factor used to magnify source display", NULL},
  56 /*      {"invert image", 'i', POPT_ARG_NONE, &global_options.invert_image, 'i', "invert the image colormap", NULL}, */
  57         {"fast-colormap-conversion", 'c', POPT_ARG_NONE, &global_options.fast_cmap_convert, 'c', "use faster colormap conversion algorithm (fails for 6 bit color)", NULL},
  58         {"no-bonobo", '\0', POPT_ARG_NONE, &global_options.no_bonobo, '\0', "don't use bonobo for controls, use sockets", NULL},
  59         {"no-initial-region", '\0', POPT_ARG_NONE, &global_options.no_initial_region, '\0', "don't create an initial zoom region", NULL},
  60         {NULL, 0, 0, NULL, 0, 0}
  61 };
  62
  63 #define MSG_LEN 80
  64
  65 static GtkWidget *window; /* TODO: clean up, with accessor func? */
  66
  67 static void
  68 magnifier_realize (GtkWidget *widget)
  69 {
  70   XWMHints wm_hints;
  71   Atom wm_window_protocols[2];
  72   static gboolean initialized = FALSE;
  73
  74   if (!initialized)
  75     {
  76       wm_window_protocols[0] = gdk_x11_get_xatom_by_name ("WM_DELETE_WINDOW");
  77       wm_window_protocols[1] = gdk_x11_get_xatom_by_name ("_NET_WM_PING");
  78     }
  79
  80   wm_hints.flags = InputHint;
  81   wm_hints.input = False;
  82
  83   XSetWMHints (GDK_WINDOW_XDISPLAY (widget->window),
  84                GDK_WINDOW_XWINDOW (widget->window), &wm_hints);
  85
  86   XSetWMProtocols (GDK_WINDOW_XDISPLAY (widget->window),
  87                    GDK_WINDOW_XWINDOW (widget->window), wm_window_protocols, 2);
  88 }
  89
  90 static void
  91 magnifier_exit()
  92 {
  93   gtk_exit(0);
  94 }
  95
  96 static gboolean get_commands(GIOChannel* client,
  97                              GIOCondition condition,
  98                              gpointer data){
  99   char msg[MSG_LEN];
 100   int desc_client = 0;
 101
 102   memset(msg,0,MSG_LEN);
 103
 104   if((desc_client = accept(desc,(struct sockaddr*)&client_sockaddr,&size_client)) == -1){
 105     perror("Could connect to client");exit(1);
 106   }
 107
 108   read(desc_client,msg,sizeof(msg));
 109   parse_message(msg, data);
 110   return TRUE;
 111
 112 }
 113
 114 static void
 115 magnifier_pack_regions (Magnifier *magnifier)
 116 {
 117   /*
 118    * this call prevents resizing, which is a bother, but required to
 119    * work around dtwm incompatibilities.  Perhaps a better workaround will
 120    * be found, or we can make this a runtime option.
 121    */
 122   gtk_widget_set_size_request (magnifier->mag_data->output_window,
 123                                magnifier->mag_data->mag_width,
 124                                magnifier->mag_data->mag_height);
 125
 126   gdk_window_move(magnifier->mag_data->output_window->window,
 127                   magnifier->mag_data->mag_x,
 128                   magnifier->mag_data->mag_y);
 129
 130 }
 131
 132 int main (int argc, char** argv){
 133   GIOChannel *mag_channel;
 134   char *dpyname;
 135   char env_string[ENV_STRING_MAX_SIZE];
 136
 137   /* TODO: finish replacing socket connection IPC with bonobo service. */
 138   Magnifier *magnifier;
 139   char * obj_id;
 140   GdkGeometry geometry;
 141
 142   x_cmap = NULL;
 143
 144   size_client = sizeof(client_sockaddr);
 145
 146   image = NULL;
 147
 148   if (!bonobo_init (&argc, argv))
 149     {
 150       g_error ("Could not initialize Bonobo");
 151     }
 152
 153   magnifier = magnifier_new (argc, argv);
 154
 155   magnifier->mag_data->follow_mouse =
 156           global_options.mouse_follow;
 157   magnifier->mag_data->color_inverted =
 158           global_options.invert_image;
 159   if (!global_options.no_initial_region)
 160     {
 161       magnifier->mag_data->zoom_regions =
 162               g_list_prepend (magnifier->mag_data->zoom_regions,
 163                               g_new0 (ZoomRegionData, 1));
 164       magnifier->mag_data->factor_x = (int) global_options.zoom_factor;
 165       magnifier->mag_data->factor_y = (int) global_options.zoom_factor;
 166     }
 167   else {
 168       g_print ("starting magnifier with no initial zoom region\n");
 169       magnifier->mag_data->mag_width = 0;
 170       magnifier->mag_data->mag_height = 0;
 171   }
 172       /* TODO: enable fractional magnifications option? */
 173   if (global_options.target_display) {
 174     snprintf (env_string, (size_t) (ENV_STRING_MAX_SIZE-1), "DISPLAY=%s", global_options.target_display);
 175     putenv (env_string);
 176   }
 177   gtk_init (&argc, &argv);
 178
 179   window = g_object_connect (gtk_widget_new (gtk_window_get_type (),
 180                                              "user_data", NULL,
 181                                              "can_focus", FALSE,
 182                                              "type", GTK_WINDOW_TOPLEVEL,
 183                                              "title", "magnifier",
 184                                              "allow_grow", FALSE,
 185                                              "allow_shrink", FALSE,
 186                                              "border_width", 10,
 187                                              NULL),
 188                              "signal::realize", magnifier_realize, NULL,
 189                              "signal::destroy", magnifier_exit, NULL,
 190                              NULL);
 191
 192   drawing_area = gtk_drawing_area_new();
 193   gtk_container_add (GTK_CONTAINER (window),drawing_area);
 194   gtk_widget_add_events(GTK_WIDGET(drawing_area),GDK_BUTTON_PRESS_MASK);
 195   gtk_signal_connect (GTK_OBJECT (drawing_area),"expose_event",
 196                       GTK_SIGNAL_FUNC(expose_event),NULL);
 197
 198   /* Init socket */
 199   if (global_options.no_bonobo) {
 200     if((desc = socket(AF_UNIX,SOCK_STREAM,0)) == -1){
 201       perror("Socket");exit(1);
 202     }
 203     unlink("/tmp/magnifier_socket");
 204
 205     if(bind(desc,(struct sockaddr*)&mag_server,sizeof(mag_server)) == -1){
 206        perror("Bind");exit(1);
 207     }
 208
 209     if(listen(desc,100) == -1){
 210        perror("Listen");exit(1);
 211     }
 212     mag_channel = g_io_channel_unix_new(desc);
 213     g_io_add_watch(mag_channel,
 214                    G_IO_IN | G_IO_ERR,
 215                    get_commands,
 216                    magnifier->mag_data);
 217
 218   }
 219
 220   /* init image information */
 221   if (!global_options.source_display) global_options.source_display = gdk_get_display();
 222   dpyname = global_options.source_display + (strlen(global_options.source_display) - 1);
 223   screen_num = atoi(dpyname);
 224   if (!global_options.target_display) {
 225     if((screen_num == 0) && global_options.dual_head)
 226       screen_num++;
 227     else if (global_options.dual_head)
 228       screen_num--;
 229     global_options.target_display =
 230             (char *) malloc (strlen (global_options.source_display));
 231     strncpy (global_options.target_display,
 232              global_options.source_display,
 233              strlen(global_options.source_display)-2);
 234     global_options.target_display[strlen(global_options.source_display)-2] = 0;
 235     sprintf(global_options.target_display, "%s.%d",
 236             global_options.target_display, screen_num);
 237   }
 238
 239   printf("displays: source=%s; target=%s\n",
 240          global_options.source_display,
 241          global_options.target_display);
 242
 243   magnifier->mag_data->source_display = XOpenDisplay (global_options.source_display);
 244   magnifier->mag_data->target_display = GDK_DISPLAY();
 245
 246   spi_image_root_window = RootWindow(magnifier->mag_data->source_display, screen_num);
 247   gdk_pixbuf_xlib_init (magnifier->mag_data->source_display, screen_num);
 248   image = gdk_pixbuf_new        (GDK_COLORSPACE_RGB,FALSE, 8,
 249                                 DisplayWidth (magnifier->mag_data->source_display,screen_num)/2,
 250                                 DisplayHeight(magnifier->mag_data->source_display,screen_num)/2);
 251   scaled_image = gdk_pixbuf_new (GDK_COLORSPACE_RGB,FALSE, 8,
 252                                 DisplayWidth (magnifier->mag_data->target_display,screen_num),
 253                                 DisplayHeight(magnifier->mag_data->target_display,screen_num));
 254   if (global_options.vertical_split)
 255     {
 256       magnifier->mag_data->mag_width =
 257               DisplayWidth (magnifier->mag_data->target_display,screen_num)/2;
 258       magnifier->mag_data->mag_height =
 259               DisplayHeight (magnifier->mag_data->target_display, screen_num);
 260     }
 261   else if (global_options.horizontal_split)
 262     {
 263       magnifier->mag_data->mag_width =
 264             DisplayWidth (magnifier->mag_data->target_display, screen_num);
 265       magnifier->mag_data->mag_height =
 266             DisplayHeight (magnifier->mag_data->target_display,screen_num)/2;
 267     }
 268   else if (global_options.fullscreen)
 269     {
 270       magnifier->mag_data->mag_width =
 271             DisplayWidth (magnifier->mag_data->target_display, screen_num);
 272       magnifier->mag_data->mag_height =
 273             DisplayHeight (magnifier->mag_data->target_display,screen_num);
 274     }
 275   magnifier->mag_data->mag_x =
 276           DisplayWidth (magnifier->mag_data->target_display, screen_num)
 277           - magnifier->mag_data->mag_width;
 278   magnifier->mag_data->mag_y =
 279           DisplayHeight (magnifier->mag_data->target_display, screen_num)
 280           - magnifier->mag_data->mag_height;
 281
 282   magnifier->mag_data->output_window = window;
 283   gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
 284   gtk_widget_show_all (window);
 285
 286   magnifier_pack_regions (magnifier);
 287
 288   /* if (global_options.fullscreen) */
 289   gdk_window_stick (window->window);
 290   gdk_window_set_functions(window->window, 0);
 291   gdk_window_raise(window->window);
 292
 293   gtk_timeout_add(global_options.min_refresh_time, display_image, magnifier->mag_data);
 294
 295   obj_id = "OAFIID:Accessibility_Util_Magnifier:proto0.1";
 296
 297   if (! global_options.no_bonobo)
 298     {
 299       int ret = bonobo_activation_active_server_register (
 300         obj_id, BONOBO_OBJREF (magnifier));
 301
 302       if (ret == Bonobo_ACTIVATION_REG_SUCCESS)
 303         {
 304           bonobo_main ();
 305         }
 306     }
 307   else
 308     {
 309       gtk_main ();
 310     }
 311
 312   unlink("magnifier_socket");
 313   return 0;
 314 }
 315
 316 static void
 317 impl_magnifier_fullscreen (PortableServer_Servant servant,
 318                            CORBA_Environment *ev)
 319 {
 320   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 321   magnifier->mag_data->mag_width = DisplayWidth (magnifier->mag_data->target_display, screen_num);
 322   magnifier->mag_data->mag_height = DisplayHeight (magnifier->mag_data->target_display, screen_num);
 323 }
 324
 325 static void
 326 impl_magnifier_set_extents (PortableServer_Servant servant,
 327                             CORBA_long x1,
 328                             CORBA_long y1,
 329                             CORBA_long x2,
 330                             CORBA_long y2,
 331                             CORBA_Environment *ev)
 332 {
 333   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 334   magnifier->mag_data->mag_width = x2 - x1;
 335   magnifier->mag_data->mag_height = y2 - y1;
 336   gdk_window_move(window->window, x1, y1);
 337 }
 338
 339 static void
 340 impl_magnifier_set_follow_mouse (PortableServer_Servant servant,
 341                                  const CORBA_boolean follow_mouse,
 342                                  CORBA_Environment *ev)
 343 {
 344   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 345   magnifier->mag_data->follow_mouse = (int) follow_mouse;
 346 }
 347
 348 static void
 349 impl_magnifier_set_contrast (PortableServer_Servant servant,
 350                              const CORBA_short contrast,
 351                              CORBA_Environment *ev)
 352 {
 353   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 354   magnifier->mag_data->contrast = (int) contrast;
 355 }
 356
 357 static void
 358 impl_magnifier_set_source_display (PortableServer_Servant servant,
 359                                    const CORBA_char *display,
 360                                    CORBA_Environment *ev)
 361 {
 362   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 363   magnifier->mag_data->source_display =
 364           XOpenDisplay (global_options.source_display);
 365 }
 366
 367 static void
 368 impl_magnifier_set_target_display (PortableServer_Servant servant,
 369                                    const CORBA_char *display,
 370                                    CORBA_Environment *ev)
 371 {
 372   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 373   magnifier->mag_data->target_display = GDK_DISPLAY();
 374 }
 375
 376 static void
 377 impl_magnifier_goto (PortableServer_Servant servant,
 378                      const CORBA_long x,
 379                      const CORBA_long y,
 380                      CORBA_Environment *ev)
 381 {
 382   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 383   magnifier->mag_data->center.x = (int) x;
 384   magnifier->mag_data->center.y = (int) y;
 385 }
 386
 387 static void
 388 impl_magnifier_set_roi (PortableServer_Servant servant,
 389                         const CORBA_short zoom_region,
 390                         const CORBA_long x1,
 391                         const CORBA_long y1,
 392                         const CORBA_long x2,
 393                         const CORBA_long y2,
 394                         CORBA_Environment *ev)
 395 {
 396   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 397   magnifier->mag_data->center.x = (int) ((x1 + x2)/2);
 398   magnifier->mag_data->center.y = (int) ((y1 + y2)/2);
 399 }
 400
 401 static void
 402 impl_magnifier_set_mag_factor (PortableServer_Servant servant,
 403                                const CORBA_short zoom_region,
 404                                const CORBA_float mag_factor_x,
 405                                const CORBA_float mag_factor_y,
 406                                CORBA_Environment *ev)
 407 {
 408   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 409   if (zoom_region == (CORBA_short) 0) /* TODO: fix for multi-zoom-regions */
 410     {
 411       magnifier->mag_data->factor_x = (float) mag_factor_x;
 412       magnifier->mag_data->factor_y = (float) mag_factor_y;
 413     }
 414 }
 415
 416 static void
 417 impl_magnifier_mark_dirty (PortableServer_Servant servant,
 418                            const CORBA_short zoom_region,
 419                            const CORBA_long x1,
 420                            const CORBA_long y1,
 421                            const CORBA_long x2,
 422                            const CORBA_long y2,
 423                            CORBA_Environment *ev)
 424 {
 425   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 426   /* TODO: implement */
 427 }
 428
 429 static void
 430 impl_magnifier_mark_unmanaged (PortableServer_Servant servant,
 431                                const CORBA_short zoom_region,
 432                                CORBA_Environment *ev)
 433 {
 434   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 435   /* TODO: implement */
 436 }
 437
 438 static CORBA_short
 439 impl_magnifier_create_zoom_region (PortableServer_Servant servant,
 440                                    const CORBA_float zx,
 441                                    const CORBA_float zy,
 442                                    const CORBA_long x1,
 443                                    const CORBA_long y1,
 444                                    const CORBA_long x2,
 445                                    const CORBA_long y2,
 446                                    CORBA_Environment *ev)
 447 {
 448   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 449   if (magnifier->mag_data->zoom_regions == NULL)
 450     {
 451       magnifier->mag_data->zoom_regions =
 452               g_list_prepend (magnifier->mag_data->zoom_regions,
 453                               g_new0 (ZoomRegionData, 1));
 454       magnifier->mag_data->factor_x = (int) zx;
 455       magnifier->mag_data->factor_y = (int) zy;
 456       magnifier->mag_data->mag_x = x1;
 457       magnifier->mag_data->mag_y = y1;
 458       magnifier->mag_data->mag_width = (x2 - x1);
 459       magnifier->mag_data->mag_height = (y2 - y1);
 460       magnifier_pack_regions (magnifier);
 461       return 0;
 462     }
 463   else
 464     {
 465       return -1;
 466     }
 467 }
 468
 469 static CORBA_boolean
 470 impl_magnifier_get_zoom_region_params (PortableServer_Servant servant,
 471                                        const CORBA_short zoom_region,
 472                                        CORBA_float * zx,
 473                                        CORBA_float * zy, CORBA_long * x1,
 474                                        CORBA_long * y1, CORBA_long * x2,
 475                                        CORBA_long * y2,
 476                                        CORBA_Environment * ev)
 477 {
 478   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 479   if (zoom_region == (CORBA_short) 0)
 480   {
 481     *zx = magnifier->mag_data->factor_x;
 482     *zy = magnifier->mag_data->factor_y;
 483     *x1 = 0;
 484     *y1 = 0;
 485     *x2 = *x1 + magnifier->mag_data->mag_width;
 486     *y2 = *y1 + magnifier->mag_data->mag_height;
 487     return CORBA_TRUE;
 488   }
 489   else return CORBA_FALSE;
 490 }
 491
 492 static void
 493 impl_magnifier_resize_zoom_region (PortableServer_Servant servant,
 494                                    const CORBA_short zoom_region,
 495                                    const CORBA_long x1, const CORBA_long y1,
 496                                    const CORBA_long x2, const CORBA_long y2,
 497                                    CORBA_Environment * ev)
 498 {
 499   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 500   if (zoom_region == 0)
 501     {
 502       magnifier->mag_data->mag_x = x1;
 503       magnifier->mag_data->mag_y = y1;
 504       magnifier->mag_data->mag_width = (x2 - x1);
 505       magnifier->mag_data->mag_height = (y2 - y1);
 506       magnifier_pack_regions (magnifier);
 507     }
 508 }
 509
 510 static void
 511 impl_magnifier_destroy_zoom_region (PortableServer_Servant servant,
 512                                     const CORBA_short zoom_region,
 513                                     CORBA_Environment * ev)
 514 {
 515   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 516   if (zoom_region == 0)
 517     {
 518       g_list_free (magnifier->mag_data->zoom_regions);
 519     }
 520 }
 521
 522 static void
 523 impl_magnifier_clear_all_zoom_regions (PortableServer_Servant servant,
 524                                        CORBA_Environment * ev)
 525 {
 526   Magnifier *magnifier = MAGNIFIER (bonobo_object_from_servant (servant));
 527   g_list_free (magnifier->mag_data->zoom_regions);
 528   magnifier->mag_data->zoom_regions = NULL;
 529 }
 530
 531 static void
 532 impl_magnifier_exit (PortableServer_Servant servant, CORBA_Environment *ev)
 533 {
 534         ;
 535 }
 536
 537 static void
 538 magnifier_class_init (MagnifierClass *klass)
 539 {
 540         GObjectClass * object_class = (GObjectClass *) klass;
 541         POA_Accessibility_Magnifier__epv *epv = &klass->epv;
 542 /*
 543         object_class->finalize = magnifier_finalize;
 544 */
 545         epv->_set_SourceDisplay = impl_magnifier_set_source_display;
 546         epv->_set_TargetDisplay = impl_magnifier_set_target_display;
 547         epv->setROI = impl_magnifier_set_roi;
 548         epv->setMagFactor = impl_magnifier_set_mag_factor;
 549         epv->markDirty = impl_magnifier_mark_dirty;
 550         epv->markUnmanaged = impl_magnifier_mark_unmanaged;
 551         epv->createZoomRegion = impl_magnifier_create_zoom_region;
 552         epv->getZoomRegionParams = impl_magnifier_get_zoom_region_params;
 553         epv->resizeZoomRegion = impl_magnifier_resize_zoom_region;
 554         epv->destroyZoomRegion = impl_magnifier_destroy_zoom_region;
 555         epv->clearAllZoomRegions = impl_magnifier_clear_all_zoom_regions;
 556         epv->exit = impl_magnifier_exit;
 557 }
 558
 559 static void
 560 magnifier_init (Magnifier *magnifier)
 561 {
 562   magnifier->mag_data = (MagnifierData *) g_new0 (MagnifierData, 1);
 563   magnifier->mag_data->factor_x = 2;
 564   magnifier->mag_data->factor_y = 2;
 565   magnifier->mag_data->contrast = 0;
 566   magnifier->mag_data->color_inverted = FALSE;
 567   magnifier->mag_data->fast_rgb_convert = FALSE;
 568   magnifier->mag_data->center.x = 0;
 569   magnifier->mag_data->center.y = 0;
 570   magnifier->mag_data->zoom_regions = NULL;
 571 }
 572
 573 GType
 574 magnifier_get_type (void)
 575 {
 576         static GType type = 0;
 577
 578         if (!type) {
 579                 static const GTypeInfo tinfo = {
 580                         sizeof (MagnifierClass),
 581                         (GBaseInitFunc) NULL,
 582                         (GBaseFinalizeFunc) NULL,
 583                         (GClassInitFunc) magnifier_class_init,
 584                         (GClassFinalizeFunc) NULL,
 585                         NULL, /* class data */
 586                         sizeof (Magnifier),
 587                         0, /* n preallocs */
 588                         (GInstanceInitFunc) magnifier_init,
 589                         NULL /* value table */
 590                 };
 591                 /*
 592                  *   Here we use bonobo_type_unique instead of
 593                  * gtk_type_unique, this auto-generates a load of
 594                  * CORBA structures for us. All derived types must
 595                  * use bonobo_type_unique.
 596                  */
 597                 type = bonobo_type_unique (
 598                         PARENT_TYPE,
 599                         POA_Accessibility_Magnifier__init,
 600                         NULL,
 601                         G_STRUCT_OFFSET (MagnifierClass, epv),
 602                         &tinfo,
 603                         "Magnifier");
 604         }
 605
 606         return type;
 607 }
 608
 609 Magnifier *
 610 magnifier_new (int argc, char **argv)
 611 {
 612   poptContext ctx;
 613   Magnifier *magnifier =
 614           MAGNIFIER (g_object_new (magnifier_get_type(), NULL));
 615   ctx = poptGetContext ("magnifier",
 616                         argc,
 617                         (const char **)argv,
 618                         magnifier_options,
 619                         0);
 620
 621   while (poptGetNextOpt (ctx) >= 0)
 622         /**/;
 623
 624   return magnifier;
 625 }