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 #include "gtkaccellabel.h"
  30 #include "gtkaccelmap.h"
  31 #include "gtkmain.h"
  32 #include "gtksignal.h"
  33 #include "gtkintl.h"
  34
  35 #include <string.h>
  36 #include <ctype.h>
  37
  38 enum {
  39   PROP_0,
  40   PROP_ACCEL_CLOSURE,
  41   PROP_ACCEL_WIDGET
  42 };
  43
  44 static void     gtk_accel_label_class_init   (GtkAccelLabelClass *klass);
  45 static void     gtk_accel_label_init         (GtkAccelLabel      *accel_label);
  46 static void     gtk_accel_label_set_property (GObject            *object,
  47                                               guint               prop_id,
  48                                               const GValue       *value,
  49                                               GParamSpec         *pspec);
  50 static void     gtk_accel_label_get_property (GObject            *object,
  51                                               guint               prop_id,
  52                                               GValue             *value,
  53                                               GParamSpec         *pspec);
  54 static void     gtk_accel_label_destroy      (GtkObject          *object);
  55 static void     gtk_accel_label_finalize     (GObject            *object);
  56 static void     gtk_accel_label_size_request (GtkWidget          *widget,
  57                                               GtkRequisition     *requisition);
  58 static gboolean gtk_accel_label_expose_event (GtkWidget          *widget,
  59                                               GdkEventExpose     *event);
  60 static gboolean gtk_accel_label_refetch_idle (GtkAccelLabel      *accel_label);
  61
  62 static GtkAccelLabelClass *accel_label_class = NULL;
  63 static GtkLabelClass *parent_class = NULL;
  64
  65
  66 GtkType
  67 gtk_accel_label_get_type (void)
  68 {
  69   static GtkType accel_label_type = 0;
  70
  71   if (!accel_label_type)
  72     {
  73       static const GtkTypeInfo accel_label_info =
  74       {
  75         "GtkAccelLabel",
  76         sizeof (GtkAccelLabel),
  77         sizeof (GtkAccelLabelClass),
  78         (GtkClassInitFunc) gtk_accel_label_class_init,
  79         (GtkObjectInitFunc) gtk_accel_label_init,
  80         /* reserved_1 */ NULL,
  81         /* reserved_2 */ NULL,
  82         (GtkClassInitFunc) NULL,
  83       };
  84
  85       accel_label_type = gtk_type_unique (GTK_TYPE_LABEL, &accel_label_info);
  86     }
  87
  88   return accel_label_type;
  89 }
  90
  91 static void
  92 gtk_accel_label_class_init (GtkAccelLabelClass *class)
  93 {
  94   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  95   GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
  96   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  97
  98   accel_label_class = class;
  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   class->mod_name_shift = g_strdup ("Shift");
 113   class->mod_name_control = g_strdup ("Ctrl");
 114   class->mod_name_alt = g_strdup ("Alt");
 115   class->mod_separator = g_strdup ("+");
 116   class->accel_seperator = g_strdup (" / ");
 117   class->latin1_to_char = TRUE;
 118
 119   g_object_class_install_property (G_OBJECT_CLASS (object_class),
 120                                    PROP_ACCEL_CLOSURE,
 121                                    g_param_spec_boxed ("accel_closure",
 122                                                        _("Accelerator Closure"),
 123                                                        _("The closure to be monitored for accelerator changes"),
 124                                                        G_TYPE_CLOSURE,
 125                                                        G_PARAM_READABLE | G_PARAM_WRITABLE));
 126   g_object_class_install_property (G_OBJECT_CLASS (object_class),
 127                                    PROP_ACCEL_WIDGET,
 128                                    g_param_spec_object ("accel_widget",
 129                                                         _("Accelerator Widget"),
 130                                                         _("The widget to be monitored for accelerator changes"),
 131                                                         GTK_TYPE_WIDGET,
 132                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
 133 }
 134
 135 static void
 136 gtk_accel_label_set_property (GObject      *object,
 137                               guint         prop_id,
 138                               const GValue *value,
 139                               GParamSpec   *pspec)
 140 {
 141   GtkAccelLabel  *accel_label;
 142
 143   accel_label = GTK_ACCEL_LABEL (object);
 144
 145   switch (prop_id)
 146     {
 147     case PROP_ACCEL_CLOSURE:
 148       gtk_accel_label_set_accel_closure (accel_label, g_value_get_boxed (value));
 149       break;
 150     case PROP_ACCEL_WIDGET:
 151       gtk_accel_label_set_accel_widget (accel_label, g_value_get_object (value));
 152       break;
 153     default:
 154       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 155       break;
 156     }
 157 }
 158
 159 static void
 160 gtk_accel_label_get_property (GObject    *object,
 161                               guint       prop_id,
 162                               GValue     *value,
 163                               GParamSpec *pspec)
 164 {
 165   GtkAccelLabel  *accel_label;
 166
 167   accel_label = GTK_ACCEL_LABEL (object);
 168
 169   switch (prop_id)
 170     {
 171     case PROP_ACCEL_CLOSURE:
 172       g_value_set_boxed (value, accel_label->accel_closure);
 173       break;
 174     case PROP_ACCEL_WIDGET:
 175       g_value_set_object (value, accel_label->accel_widget);
 176       break;
 177     default:
 178       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 179       break;
 180     }
 181 }
 182
 183 static void
 184 gtk_accel_label_init (GtkAccelLabel *accel_label)
 185 {
 186   accel_label->queue_id = 0;
 187   accel_label->accel_padding = 3;
 188   accel_label->accel_widget = NULL;
 189   accel_label->accel_closure = NULL;
 190   accel_label->accel_group = NULL;
 191   accel_label->accel_string = NULL;
 192
 193   gtk_accel_label_refetch (accel_label);
 194 }
 195
 196 GtkWidget*
 197 gtk_accel_label_new (const gchar *string)
 198 {
 199   GtkAccelLabel *accel_label;
 200
 201   g_return_val_if_fail (string != NULL, NULL);
 202
 203   accel_label = gtk_type_new (GTK_TYPE_ACCEL_LABEL);
 204
 205   gtk_label_set_text (GTK_LABEL (accel_label), string);
 206
 207   return GTK_WIDGET (accel_label);
 208 }
 209
 210 static void
 211 gtk_accel_label_destroy (GtkObject *object)
 212 {
 213   GtkAccelLabel *accel_label;
 214
 215   g_return_if_fail (GTK_IS_ACCEL_LABEL (object));
 216
 217   accel_label = GTK_ACCEL_LABEL (object);
 218
 219   gtk_accel_label_set_accel_widget (accel_label, NULL);
 220   gtk_accel_label_set_accel_closure (accel_label, NULL);
 221
 222   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 223 }
 224
 225 static void
 226 gtk_accel_label_finalize (GObject *object)
 227 {
 228   GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
 229
 230   if (accel_label->queue_id)
 231     {
 232       gtk_idle_remove (accel_label->queue_id);
 233       accel_label->queue_id = 0;
 234     }
 235   g_free (accel_label->accel_string);
 236
 237   G_OBJECT_CLASS (parent_class)->finalize (object);
 238 }
 239
 240 /**
 241  * gtk_accel_label_get_accel_widget:
 242  * @accel_label: a #GtkAccelLabel
 243  *
 244  * Fetches the widget monitored by this accelerator label. See
 245  * gtk_accel_label_set_accel_widget().
 246  *
 247  * Return value: the object monitored by the accelerator label,
 248  *               or %NULL.
 249  **/
 250 GtkWidget*
 251 gtk_accel_label_get_accel_widget (GtkAccelLabel *accel_label)
 252 {
 253   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), NULL);
 254
 255   return accel_label->accel_widget;
 256 }
 257
 258 guint
 259 gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label)
 260 {
 261   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), 0);
 262
 263   return (accel_label->accel_string_width +
 264           (accel_label->accel_string_width ? accel_label->accel_padding : 0));
 265 }
 266
 267 static void
 268 gtk_accel_label_size_request (GtkWidget      *widget,
 269                               GtkRequisition *requisition)
 270 {
 271   GtkAccelLabel *accel_label;
 272   PangoLayout *layout;
 273   gint width;
 274
 275   g_return_if_fail (GTK_IS_ACCEL_LABEL (widget));
 276   g_return_if_fail (requisition != NULL);
 277
 278   accel_label = GTK_ACCEL_LABEL (widget);
 279
 280   if (GTK_WIDGET_CLASS (parent_class)->size_request)
 281     GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
 282
 283   layout = gtk_widget_create_pango_layout (widget, accel_label->accel_string);
 284   pango_layout_get_pixel_size (layout, &width, NULL);
 285   accel_label->accel_string_width = width;
 286
 287   g_object_unref (G_OBJECT (layout));
 288 }
 289
 290 static gboolean
 291 gtk_accel_label_expose_event (GtkWidget      *widget,
 292                               GdkEventExpose *event)
 293 {
 294   GtkMisc *misc;
 295   GtkAccelLabel *accel_label;
 296   PangoLayout *layout;
 297
 298   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (widget), FALSE);
 299   g_return_val_if_fail (event != NULL, FALSE);
 300
 301   accel_label = GTK_ACCEL_LABEL (widget);
 302   misc = GTK_MISC (accel_label);
 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 (G_OBJECT (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 TRUE;
 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 void
 372 gtk_accel_label_set_accel_widget (GtkAccelLabel *accel_label,
 373                                   GtkWidget     *accel_widget)
 374 {
 375   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 376   if (accel_widget)
 377     g_return_if_fail (GTK_IS_WIDGET (accel_widget));
 378
 379   if (accel_widget != accel_label->accel_widget)
 380     {
 381       if (accel_label->accel_widget)
 382         {
 383           gtk_accel_label_set_accel_closure (accel_label, NULL);
 384           g_signal_handlers_disconnect_by_func (accel_label->accel_widget,
 385                                                 G_CALLBACK (refetch_widget_accel_closure),
 386                                                 accel_label);
 387           g_object_unref (accel_label->accel_widget);
 388         }
 389       accel_label->accel_widget = accel_widget;
 390       if (accel_label->accel_widget)
 391         {
 392           g_object_ref (accel_label->accel_widget);
 393           g_signal_connect_object (accel_label->accel_widget, "accel_closures_changed",
 394                                    G_CALLBACK (refetch_widget_accel_closure),
 395                                    accel_label, G_CONNECT_SWAPPED);
 396           refetch_widget_accel_closure (accel_label);
 397         }
 398       g_object_notify (G_OBJECT (accel_label), "accel_widget");
 399     }
 400 }
 401
 402 static void
 403 gtk_accel_label_queue_refetch (GtkAccelLabel *accel_label)
 404 {
 405   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 406
 407   if (accel_label->queue_id == 0)
 408     accel_label->queue_id = gtk_idle_add_priority (G_PRIORITY_HIGH_IDLE,
 409                                                    (GtkFunction) gtk_accel_label_refetch_idle,
 410                                                    accel_label);
 411 }
 412
 413 static void
 414 check_accel_changed (GtkAccelGroup  *accel_group,
 415                      guint           keyval,
 416                      GdkModifierType modifier,
 417                      GClosure       *accel_closure,
 418                      GtkAccelLabel  *accel_label)
 419 {
 420   if (accel_closure == accel_label->accel_closure)
 421     gtk_accel_label_queue_refetch (accel_label);
 422 }
 423
 424 void
 425 gtk_accel_label_set_accel_closure (GtkAccelLabel *accel_label,
 426                                    GClosure      *accel_closure)
 427 {
 428   g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
 429   if (accel_closure)
 430     g_return_if_fail (gtk_accel_group_from_accel_closure (accel_closure) != NULL);
 431
 432   if (accel_closure != accel_label->accel_closure)
 433     {
 434       if (accel_label->accel_closure)
 435         {
 436           g_signal_handlers_disconnect_by_func (accel_label->accel_group,
 437                                                 G_CALLBACK (check_accel_changed),
 438                                                 accel_label);
 439           accel_label->accel_group = NULL;
 440           g_closure_unref (accel_label->accel_closure);
 441         }
 442       accel_label->accel_closure = accel_closure;
 443       if (accel_label->accel_closure)
 444         {
 445           g_closure_ref (accel_label->accel_closure);
 446           accel_label->accel_group = gtk_accel_group_from_accel_closure (accel_closure);
 447           g_signal_connect_object (accel_label->accel_group, "accel_changed",
 448                                    G_CALLBACK (check_accel_changed),
 449                                    accel_label, 0);
 450         }
 451       gtk_accel_label_queue_refetch (accel_label);
 452       g_object_notify (G_OBJECT (accel_label), "accel_closure");
 453     }
 454 }
 455
 456 static gboolean
 457 gtk_accel_label_refetch_idle (GtkAccelLabel *accel_label)
 458 {
 459   gboolean retval;
 460
 461   GDK_THREADS_ENTER ();
 462   retval = gtk_accel_label_refetch (accel_label);
 463   GDK_THREADS_LEAVE ();
 464
 465   return retval;
 466 }
 467
 468 static gboolean
 469 find_accel (GtkAccelKey *key,
 470             GClosure    *closure,
 471             gpointer     data)
 472 {
 473   return data == (gpointer) closure;
 474 }
 475
 476 gboolean
 477 gtk_accel_label_refetch (GtkAccelLabel *accel_label)
 478 {
 479   GtkAccelLabelClass *class;
 480   gchar *utf8;
 481
 482   g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
 483
 484   class = GTK_ACCEL_LABEL_GET_CLASS (accel_label);
 485
 486   g_free (accel_label->accel_string);
 487   accel_label->accel_string = NULL;
 488
 489   if (accel_label->accel_closure)
 490     {
 491       GtkAccelKey *key = gtk_accel_group_find (accel_label->accel_group, find_accel, accel_label->accel_closure);
 492
 493       if (key && key->accel_flags & GTK_ACCEL_VISIBLE)
 494         {
 495           GString *gstring;
 496           gboolean seen_mod = FALSE;
 497
 498           gstring = g_string_new (accel_label->accel_string);
 499           g_string_append (gstring, gstring->len ? class->accel_seperator : "   ");
 500
 501           if (key->accel_mods & GDK_SHIFT_MASK)
 502             {
 503               g_string_append (gstring, class->mod_name_shift);
 504               seen_mod = TRUE;
 505             }
 506           if (key->accel_mods & GDK_CONTROL_MASK)
 507             {
 508               if (seen_mod)
 509                 g_string_append (gstring, class->mod_separator);
 510               g_string_append (gstring, class->mod_name_control);
 511               seen_mod = TRUE;
 512             }
 513           if (key->accel_mods & GDK_MOD1_MASK)
 514             {
 515               if (seen_mod)
 516                 g_string_append (gstring, class->mod_separator);
 517               g_string_append (gstring, class->mod_name_alt);
 518               seen_mod = TRUE;
 519             }
 520           if (seen_mod)
 521             g_string_append (gstring, class->mod_separator);
 522           if (key->accel_key < 0x80 ||
 523               (key->accel_key > 0x80 &&
 524                key->accel_key <= 0xff &&
 525                class->latin1_to_char))
 526             {
 527               switch (key->accel_key)
 528                 {
 529                 case ' ':
 530                   g_string_append (gstring, "Space");
 531                   break;
 532                 case '\\':
 533                   g_string_append (gstring, "Backslash");
 534                   break;
 535                 default:
 536                   g_string_append_unichar (gstring, toupper (key->accel_key));
 537                   break;
 538                 }
 539             }
 540           else
 541             {
 542               gchar *tmp;
 543
 544               tmp = gtk_accelerator_name (key->accel_key, 0);
 545               if (tmp[0] != 0 && tmp[1] == 0)
 546                 tmp[0] = toupper (tmp[0]);
 547               g_string_append (gstring, tmp);
 548               g_free (tmp);
 549             }
 550           g_free (accel_label->accel_string);
 551           accel_label->accel_string = gstring->str;
 552           g_string_free (gstring, FALSE);
 553         }
 554       if (!accel_label->accel_string)
 555         accel_label->accel_string = g_strdup ("-/-");
 556     }
 557
 558   if (!accel_label->accel_string)
 559     accel_label->accel_string = g_strdup ("");
 560
 561   if (accel_label->queue_id)
 562     {
 563       gtk_idle_remove (accel_label->queue_id);
 564       accel_label->queue_id = 0;
 565     }
 566
 567   gtk_widget_queue_resize (GTK_WIDGET (accel_label));
 568
 569   return FALSE;
 570 }