Pileus Git - ~andy/gtk/blob - gtk/gtkaccellabel.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * GtkAccelLabel: GtkLabel with accelerator monitoring facilities.
   5  * Copyright (C) 1998 Tim Janik
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the
  19  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20  * Boston, MA 02111-1307, USA.
  21  */
  22
  23 /*
  24  * Modified by the GTK+ Team and others 1997-2001.  See the AUTHORS
  25  * file for a list of people on the GTK+ Team.  See the ChangeLog
  26  * files for a list of changes.  These files are distributed with
  27  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  28  */
  29
  30 #include <string.h>
  31
  32 #include "gtkaccellabel.h"
  33 #include "gtkaccelmap.h"
  34 #include "gtkmain.h"
  35 #include "gtkintl.h"
  36
  37 enum {
  38   PROP_0,
  39   PROP_ACCEL_CLOSURE,
  40   PROP_ACCEL_WIDGET
  41 };
  42
  43 static void     gtk_accel_label_class_init   (GtkAccelLabelClass *klass);
  44 static void     gtk_accel_label_init         (GtkAccelLabel      *accel_label);
  45 static void     gtk_accel_label_set_property (GObject            *object,
  46                                               guint               prop_id,
  47                                               const GValue       *value,
  48                                               GParamSpec         *pspec);
  49 static void     gtk_accel_label_get_property (GObject            *object,
  50                                               guint               prop_id,
  51                                               GValue             *value,
  52                                               GParamSpec         *pspec);
  53 static void     gtk_accel_label_destroy      (GtkObject          *object);
  54 static void     gtk_accel_label_finalize     (GObject            *object);
  55 static void     gtk_accel_label_size_request (GtkWidget          *widget,
  56                                               GtkRequisition     *requisition);
  57 static gboolean gtk_accel_label_expose_event (GtkWidget          *widget,
  58                                               GdkEventExpose     *event);
  59 static gboolean gtk_accel_label_refetch_idle (GtkAccelLabel      *accel_label);
  60
  61 static GtkLabelClass *parent_class = NULL;
  62
  63
  64 GType
  65 gtk_accel_label_get_type (void)
  66 {
  67   static GType accel_label_type = 0;
  68
  69   if (!accel_label_type)
  70     {
  71       static const GTypeInfo accel_label_info =
  72       {
  73         sizeof (GtkAccelLabelClass),
  74         NULL,           /* base_init */
  75         NULL,           /* base_finalize */
  76         (GClassInitFunc) gtk_accel_label_class_init,
  77         NULL,           /* class_finalize */
  78         NULL,           /* class_data */
  79         sizeof (GtkAccelLabel),
  80         0,              /* n_preallocs */
  81         (GInstanceInitFunc) gtk_accel_label_init,
  82       };
  83
  84       accel_label_type =
  85         g_type_register_static (GTK_TYPE_LABEL, "GtkAccelLabel",
  86                                 &accel_label_info, 0);
  87     }
  88
  89   return accel_label_type;
  90 }
  91
  92 static void
  93 gtk_accel_label_class_init (GtkAccelLabelClass *class)
  94 {
  95   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  96   GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
  97   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  98
  99   parent_class = g_type_class_peek_parent (class);
 100
 101   gobject_class->finalize = gtk_accel_label_finalize;
 102   gobject_class->set_property = gtk_accel_label_set_property;
 103   gobject_class->get_property = gtk_accel_label_get_property;
 104
 105   object_class->destroy = gtk_accel_label_destroy;
 106
 107   widget_class->size_request = gtk_accel_label_size_request;
 108   widget_class->expose_event = gtk_accel_label_expose_event;
 109
 110   class->signal_quote1 = g_strdup ("<:");
 111   class->signal_quote2 = g_strdup (":>");
 112   /* This is the text that should appear next to menu accelerators
 113    * that use the shift key. If the text on this key isn't typically
 114    * translated on keyboards used for your language, don't translate
 115    * this.
 116    */
 117   class->mod_name_shift = g_strdup (_("Shift"));
 118   /* This is the text that should appear next to menu accelerators
 119    * that use the control key. If the text on this key isn't typically
 120    * translated on keyboards used for your language, don't translate
 121    * this.
 122    */
 123   class->mod_name_control = g_strdup (_("Ctrl"));
 124   /* This is the text that should appear next to menu accelerators
 125    * that use the alt key. If the text on this key isn't typically
 126    * translated on keyboards used for your language, don't translate
 127    * this.
 128    */
 129   class->mod_name_alt = g_strdup (_("Alt"));
 130   class->mod_separator = g_strdup ("+");
 131   class->accel_seperator = g_strdup (" / ");
 132   class->latin1_to_char = TRUE;
 133
 134   g_object_class_install_property (gobject_class,
 135                                    PROP_ACCEL_CLOSURE,
 136                                    g_param_spec_boxed ("accel_closure",
 137                                                        _("Accelerator Closure"),
 138                                                        _("The closure to be monitored for accelerator changes"),
 139                                                        G_TYPE_CLOSURE,
 140                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 141   g_object_class_install_property (gobject_class,
 142                                    PROP_ACCEL_WIDGET,
 143                                    g_param_spec_object ("accel_widget",
 144                                                         _("Accelerator Widget"),
 145                                                         _("The widget to be monitored for accelerator changes"),
 146                                                         GTK_TYPE_WIDGET,
 147                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 148 }
 149
 150 static void
 151 gtk_accel_label_set_property (GObject      *object,
 152                               guint         prop_id,
 153                               const GValue *value,
 154                               GParamSpec   *pspec)
 155 {
 156   GtkAccelLabel  *accel_label;
 157
 158   accel_label = GTK_ACCEL_LABEL (object);
 159
 160   switch (prop_id)
 161     {
 162     case PROP_ACCEL_CLOSURE:
 163       gtk_accel_label_set_accel_closure (accel_label, g_value_get_boxed (value));
 164       break;
 165     case PROP_ACCEL_WIDGET:
 166       gtk_accel_label_set_accel_widget (accel_label, g_value_get_object (value));
 167       break;
 168     default:
 169       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 170       break;
 171     }
 172 }
 173
 174 static void
 175 gtk_accel_label_get_property (GObject    *object,
 176                               guint       prop_id,
 177                               GValue     *value,
 178                               GParamSpec *pspec)
 179 {
 180   GtkAccelLabel  *accel_label;
 181
 182   accel_label = GTK_ACCEL_LABEL (object);
 183
 184   switch (prop_id)
 185     {
 186     case PROP_ACCEL_CLOSURE:
 187       g_value_set_boxed (value, accel_label->accel_closure);
 188       break;
 189     case PROP_ACCEL_WIDGET:
 190       g_value_set_object (value, accel_label->accel_widget);
 191       break;
 192     default:
 193       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 194       break;
 195     }
 196 }
 197
 198 static void
 199 gtk_accel_label_init (GtkAccelLabel *accel_label)
 200 {
 201   accel_label->queue_id = 0;
 202   accel_label->accel_padding = 3;
 203   accel_label->accel_widget = NULL;
 204   accel_label->accel_closure = NULL;
 205   accel_label->accel_group = NULL;
 206   accel_label->accel_string = NULL;
 207
 208   gtk_accel_label_refetch (accel_label);
 209 }
 210
 211 GtkWidget*
 212 gtk_accel_label_new (const gchar *string)
 213 {
 214   GtkAccelLabel *accel_label;
 215
 216   g_return_val_if_fail (string != NULL, NULL);
 217
 218   accel_label = g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
 219
 220   gtk_label_set_text (GTK_LABEL (accel_label), string);
 221
 222   return GTK_WIDGET (accel_label);
 223 }
 224
 225 static void
 226 gtk_accel_label_destroy (GtkObject *object)
 227 {
 228   GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
 229
 230   gtk_accel_label_set_accel_widget (accel_label, NULL);
 231   gtk_accel_label_set_accel_closure (accel_label, NULL);
 232
 233   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 234 }
 235
 236 static void
 237 gtk_accel_label_finalize (GObject *object)
 238 {
 239   GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
 240
 241   if (accel_label->queue_id)
 242     {
 243       gtk_idle_remove (accel_label->queue_id);
 244       accel_label->queue_id = 0;
 245     }
 246   g_free (accel_label->accel_string);
 247
 248   G_OBJECT_CLASS (parent_class)->finalize (object);
 249 }
 250
 251 /**
 252  * gtk_accel_label_get_accel_widget:
 253  * @accel_label: a #GtkAccelLabel
 254  *
 255  * Fetches the widget monitored by this accelerator label. See
 256  * gtk_accel_label_set_accel_widget().
 257  *
 258  * Return value: the object monitored by the accelerator label,
 259  *               or %NULL.
 260  **/
 261 GtkWidget*
 262 gtk_accel_label_get_accel_widget (GtkAccelLabel *accel_label)
 263 {
 264   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), NULL);
 265
 266   return accel_label->accel_widget;
 267 }
 268
 269 guint
 270 gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label)
 271 {
 272   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), 0);
 273
 274   return (accel_label->accel_string_width +
 275           (accel_label->accel_string_width ? accel_label->accel_padding : 0));
 276 }
 277
 278 static void
 279 gtk_accel_label_size_request (GtkWidget      *widget,
 280                               GtkRequisition *requisition)
 281 {
 282   GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (widget);
 283   PangoLayout *layout;
 284   gint width;
 285
 286   if (GTK_WIDGET_CLASS (parent_class)->size_request)
 287     GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
 288
 289   layout = gtk_widget_create_pango_layout (widget, accel_label->accel_string);
 290   pango_layout_get_pixel_size (layout, &width, NULL);
 291   accel_label->accel_string_width = width;
 292
 293   g_object_unref (layout);
 294 }
 295
 296 static gboolean
 297 gtk_accel_label_expose_event (GtkWidget      *widget,
 298                               GdkEventExpose *event)
 299 {
 300   GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (widget);
 301   GtkMisc *misc = GTK_MISC (accel_label);
 302   PangoLayout *layout;
 303
 304   if (GTK_WIDGET_DRAWABLE (accel_label))
 305     {
 306       guint ac_width;
 307
 308       ac_width = gtk_accel_label_get_accel_width (accel_label);
 309
 310       if (widget->allocation.width >= widget->requisition.width + ac_width)
 311         {
 312           guint x;
 313           guint y;
 314
 315           widget->allocation.width -= ac_width;
 316           if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 317             GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 318           widget->allocation.width += ac_width;
 319
 320           x = widget->allocation.x + widget->allocation.width - misc->xpad - ac_width;
 321
 322           y = (widget->allocation.y * (1.0 - misc->yalign) +
 323                (widget->allocation.y + widget->allocation.height -
 324                 (widget->requisition.height - misc->ypad * 2)) *
 325                misc->yalign) + 1.5;
 326
 327           layout = gtk_widget_create_pango_layout (widget, accel_label->accel_string);
 328
 329           gtk_paint_layout (widget->style,
 330                             widget->window,
 331                             GTK_WIDGET_STATE (widget),
 332                             FALSE,
 333                             &event->area,
 334                             widget,
 335                             "accellabel",
 336                             x, y,
 337                             layout);
 338
 339           g_object_unref (layout);
 340         }
 341       else
 342         {
 343           if (GTK_WIDGET_CLASS (parent_class)->expose_event)
 344             GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
 345         }
 346     }
 347
 348   return FALSE;
 349 }
 350
 351 static void
 352 refetch_widget_accel_closure (GtkAccelLabel *accel_label)
 353 {
 354   GClosure *closure = NULL;
 355   GList *clist, *list;
 356
 357   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 358   g_return_if_fail (GTK_IS_WIDGET (accel_label->accel_widget));
 359
 360   clist = gtk_widget_list_accel_closures (accel_label->accel_widget);
 361   for (list = clist; list; list = list->next)
 362     {
 363       /* we just take the first closure used */
 364       closure = list->data;
 365       break;
 366     }
 367   g_list_free (clist);
 368   gtk_accel_label_set_accel_closure (accel_label, closure);
 369 }
 370
 371 /**
 372  * gtk_accel_label_set_accel_widget:
 373  * @accel_label: a #GtkAccelLabel
 374  * @accel_widget: the widget to be monitored.
 375  *
 376  * Sets the widget to be monitored by this accelerator label.
 377  **/
 378 void
 379 gtk_accel_label_set_accel_widget (GtkAccelLabel *accel_label,
 380                                   GtkWidget     *accel_widget)
 381 {
 382   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 383   if (accel_widget)
 384     g_return_if_fail (GTK_IS_WIDGET (accel_widget));
 385
 386   if (accel_widget != accel_label->accel_widget)
 387     {
 388       if (accel_label->accel_widget)
 389         {
 390           gtk_accel_label_set_accel_closure (accel_label, NULL);
 391           g_signal_handlers_disconnect_by_func (accel_label->accel_widget,
 392                                                 refetch_widget_accel_closure,
 393                                                 accel_label);
 394           g_object_unref (accel_label->accel_widget);
 395         }
 396       accel_label->accel_widget = accel_widget;
 397       if (accel_label->accel_widget)
 398         {
 399           g_object_ref (accel_label->accel_widget);
 400           g_signal_connect_object (accel_label->accel_widget, "accel_closures_changed",
 401                                    G_CALLBACK (refetch_widget_accel_closure),
 402                                    accel_label, G_CONNECT_SWAPPED);
 403           refetch_widget_accel_closure (accel_label);
 404         }
 405       g_object_notify (G_OBJECT (accel_label), "accel_widget");
 406     }
 407 }
 408
 409 static void
 410 gtk_accel_label_queue_refetch (GtkAccelLabel *accel_label)
 411 {
 412   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 413
 414   if (accel_label->queue_id == 0)
 415     accel_label->queue_id = gtk_idle_add_priority (G_PRIORITY_HIGH_IDLE,
 416                                                    (GtkFunction) gtk_accel_label_refetch_idle,
 417                                                    accel_label);
 418 }
 419
 420 static void
 421 check_accel_changed (GtkAccelGroup  *accel_group,
 422                      guint           keyval,
 423                      GdkModifierType modifier,
 424                      GClosure       *accel_closure,
 425                      GtkAccelLabel  *accel_label)
 426 {
 427   if (accel_closure == accel_label->accel_closure)
 428     gtk_accel_label_queue_refetch (accel_label);
 429 }
 430
 431 /**
 432  * gtk_accel_label_set_accel_closure:
 433  * @accel_label: a #GtkAccelLabel
 434  * @accel_closure: the closure to monitor for accelerator changes.
 435  *
 436  * Sets the closure to be monitored by this accelerator label. The closure
 437  * must be connected to an accelerator group; see gtk_accel_group_connect().
 438  **/
 439 void
 440 gtk_accel_label_set_accel_closure (GtkAccelLabel *accel_label,
 441                                    GClosure      *accel_closure)
 442 {
 443   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 444   if (accel_closure)
 445     g_return_if_fail (gtk_accel_group_from_accel_closure (accel_closure) != NULL);
 446
 447   if (accel_closure != accel_label->accel_closure)
 448     {
 449       if (accel_label->accel_closure)
 450         {
 451           g_signal_handlers_disconnect_by_func (accel_label->accel_group,
 452                                                 check_accel_changed,
 453                                                 accel_label);
 454           accel_label->accel_group = NULL;
 455           g_closure_unref (accel_label->accel_closure);
 456         }
 457       accel_label->accel_closure = accel_closure;
 458       if (accel_label->accel_closure)
 459         {
 460           g_closure_ref (accel_label->accel_closure);
 461           accel_label->accel_group = gtk_accel_group_from_accel_closure (accel_closure);
 462           g_signal_connect_object (accel_label->accel_group, "accel_changed",
 463                                    G_CALLBACK (check_accel_changed),
 464                                    accel_label, 0);
 465         }
 466       gtk_accel_label_queue_refetch (accel_label);
 467       g_object_notify (G_OBJECT (accel_label), "accel_closure");
 468     }
 469 }
 470
 471 static gboolean
 472 gtk_accel_label_refetch_idle (GtkAccelLabel *accel_label)
 473 {
 474   gboolean retval;
 475
 476   GDK_THREADS_ENTER ();
 477   retval = gtk_accel_label_refetch (accel_label);
 478   GDK_THREADS_LEAVE ();
 479
 480   return retval;
 481 }
 482
 483 static gboolean
 484 find_accel (GtkAccelKey *key,
 485             GClosure    *closure,
 486             gpointer     data)
 487 {
 488   return data == (gpointer) closure;
 489 }
 490
 491 gboolean
 492 gtk_accel_label_refetch (GtkAccelLabel *accel_label)
 493 {
 494   GtkAccelLabelClass *class;
 495
 496   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
 497
 498   class = GTK_ACCEL_LABEL_GET_CLASS (accel_label);
 499
 500   g_free (accel_label->accel_string);
 501   accel_label->accel_string = NULL;
 502
 503   if (accel_label->accel_closure)
 504     {
 505       GtkAccelKey *key = gtk_accel_group_find (accel_label->accel_group, find_accel, accel_label->accel_closure);
 506
 507       if (key && key->accel_flags & GTK_ACCEL_VISIBLE)
 508         {
 509           GString *gstring;
 510           gboolean seen_mod = FALSE;
 511           gunichar ch;
 512
 513           gstring = g_string_new (accel_label->accel_string);
 514           g_string_append (gstring, gstring->len ? class->accel_seperator : "   ");
 515
 516           if (key->accel_mods & GDK_SHIFT_MASK)
 517             {
 518               g_string_append (gstring, class->mod_name_shift);
 519               seen_mod = TRUE;
 520             }
 521           if (key->accel_mods & GDK_CONTROL_MASK)
 522             {
 523               if (seen_mod)
 524                 g_string_append (gstring, class->mod_separator);
 525               g_string_append (gstring, class->mod_name_control);
 526               seen_mod = TRUE;
 527             }
 528           if (key->accel_mods & GDK_MOD1_MASK)
 529             {
 530               if (seen_mod)
 531                 g_string_append (gstring, class->mod_separator);
 532               g_string_append (gstring, class->mod_name_alt);
 533               seen_mod = TRUE;
 534             }
 535           if (seen_mod)
 536             g_string_append (gstring, class->mod_separator);
 537
 538           ch = gdk_keyval_to_unicode (key->accel_key);
 539           if (ch && (g_unichar_isgraph (ch) || ch == ' ') &&
 540               (ch < 0x80 || class->latin1_to_char))
 541             {
 542               switch (ch)
 543                 {
 544                 case ' ':
 545                   g_string_append (gstring, "Space");
 546                   break;
 547                 case '\\':
 548                   g_string_append (gstring, "Backslash");
 549                   break;
 550                 default:
 551                   g_string_append_unichar (gstring, g_unichar_toupper (ch));
 552                   break;
 553                 }
 554             }
 555           else
 556             {
 557               gchar *tmp;
 558
 559               tmp = gtk_accelerator_name (key->accel_key, 0);
 560               if (tmp[0] != 0 && tmp[1] == 0)
 561                 tmp[0] = g_ascii_toupper (tmp[0]);
 562               g_string_append (gstring, tmp);
 563               g_free (tmp);
 564             }
 565           g_free (accel_label->accel_string);
 566           accel_label->accel_string = gstring->str;
 567           g_string_free (gstring, FALSE);
 568         }
 569       if (!accel_label->accel_string)
 570         accel_label->accel_string = g_strdup ("-/-");
 571     }
 572
 573   if (!accel_label->accel_string)
 574     accel_label->accel_string = g_strdup ("");
 575
 576   if (accel_label->queue_id)
 577     {
 578       gtk_idle_remove (accel_label->queue_id);
 579       accel_label->queue_id = 0;
 580     }
 581
 582   gtk_widget_queue_resize (GTK_WIDGET (accel_label));
 583
 584   return FALSE;
 585 }