1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * GtkAccelLabel: GtkLabel with accelerator monitoring facilities.
5 * Copyright (C) 1998 Tim Janik
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.
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.
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.
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/.
33 #include "gtkaccellabel.h"
34 #include "gtkaccelmap.h"
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,
50 static void gtk_accel_label_get_property (GObject *object,
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 const gchar *gtk_accel_label_get_string (GtkAccelLabel *accel_label);
63 static GtkLabelClass *parent_class = NULL;
66 gtk_accel_label_get_type (void)
68 static GType accel_label_type = 0;
70 if (!accel_label_type)
72 static const GTypeInfo accel_label_info =
74 sizeof (GtkAccelLabelClass),
76 NULL, /* base_finalize */
77 (GClassInitFunc) gtk_accel_label_class_init,
78 NULL, /* class_finalize */
79 NULL, /* class_data */
80 sizeof (GtkAccelLabel),
82 (GInstanceInitFunc) gtk_accel_label_init,
86 g_type_register_static (GTK_TYPE_LABEL, "GtkAccelLabel",
87 &accel_label_info, 0);
90 return accel_label_type;
94 gtk_accel_label_class_init (GtkAccelLabelClass *class)
96 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
97 GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
98 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
100 parent_class = g_type_class_peek_parent (class);
102 gobject_class->finalize = gtk_accel_label_finalize;
103 gobject_class->set_property = gtk_accel_label_set_property;
104 gobject_class->get_property = gtk_accel_label_get_property;
106 object_class->destroy = gtk_accel_label_destroy;
108 widget_class->size_request = gtk_accel_label_size_request;
109 widget_class->expose_event = gtk_accel_label_expose_event;
111 class->signal_quote1 = g_strdup ("<:");
112 class->signal_quote2 = g_strdup (":>");
113 /* This is the text that should appear next to menu accelerators
114 * that use the shift key. If the text on this key isn't typically
115 * translated on keyboards used for your language, don't translate
118 class->mod_name_shift = g_strdup (_("Shift"));
119 /* This is the text that should appear next to menu accelerators
120 * that use the control key. If the text on this key isn't typically
121 * translated on keyboards used for your language, don't translate
124 class->mod_name_control = g_strdup (_("Ctrl"));
125 /* This is the text that should appear next to menu accelerators
126 * that use the alt key. If the text on this key isn't typically
127 * translated on keyboards used for your language, don't translate
130 class->mod_name_alt = g_strdup (_("Alt"));
131 class->mod_separator = g_strdup ("+");
132 class->accel_seperator = g_strdup (" / ");
133 class->latin1_to_char = TRUE;
135 g_object_class_install_property (gobject_class,
137 g_param_spec_boxed ("accel_closure",
138 P_("Accelerator Closure"),
139 P_("The closure to be monitored for accelerator changes"),
141 G_PARAM_READABLE | G_PARAM_WRITABLE));
142 g_object_class_install_property (gobject_class,
144 g_param_spec_object ("accel_widget",
145 P_("Accelerator Widget"),
146 P_("The widget to be monitored for accelerator changes"),
148 G_PARAM_READABLE | G_PARAM_WRITABLE));
152 gtk_accel_label_set_property (GObject *object,
157 GtkAccelLabel *accel_label;
159 accel_label = GTK_ACCEL_LABEL (object);
163 case PROP_ACCEL_CLOSURE:
164 gtk_accel_label_set_accel_closure (accel_label, g_value_get_boxed (value));
166 case PROP_ACCEL_WIDGET:
167 gtk_accel_label_set_accel_widget (accel_label, g_value_get_object (value));
170 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
176 gtk_accel_label_get_property (GObject *object,
181 GtkAccelLabel *accel_label;
183 accel_label = GTK_ACCEL_LABEL (object);
187 case PROP_ACCEL_CLOSURE:
188 g_value_set_boxed (value, accel_label->accel_closure);
190 case PROP_ACCEL_WIDGET:
191 g_value_set_object (value, accel_label->accel_widget);
194 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
200 gtk_accel_label_init (GtkAccelLabel *accel_label)
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;
210 gtk_accel_label_new (const gchar *string)
212 GtkAccelLabel *accel_label;
214 g_return_val_if_fail (string != NULL, NULL);
216 accel_label = g_object_new (GTK_TYPE_ACCEL_LABEL, NULL);
218 gtk_label_set_text (GTK_LABEL (accel_label), string);
220 return GTK_WIDGET (accel_label);
224 gtk_accel_label_destroy (GtkObject *object)
226 GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
228 gtk_accel_label_set_accel_widget (accel_label, NULL);
229 gtk_accel_label_set_accel_closure (accel_label, NULL);
231 GTK_OBJECT_CLASS (parent_class)->destroy (object);
235 gtk_accel_label_finalize (GObject *object)
237 GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
239 g_free (accel_label->accel_string);
241 G_OBJECT_CLASS (parent_class)->finalize (object);
245 * gtk_accel_label_get_accel_widget:
246 * @accel_label: a #GtkAccelLabel
248 * Fetches the widget monitored by this accelerator label. See
249 * gtk_accel_label_set_accel_widget().
251 * Return value: the object monitored by the accelerator label,
255 gtk_accel_label_get_accel_widget (GtkAccelLabel *accel_label)
257 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), NULL);
259 return accel_label->accel_widget;
263 gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label)
265 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), 0);
267 return (accel_label->accel_string_width +
268 (accel_label->accel_string_width ? accel_label->accel_padding : 0));
272 gtk_accel_label_size_request (GtkWidget *widget,
273 GtkRequisition *requisition)
275 GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (widget);
279 if (GTK_WIDGET_CLASS (parent_class)->size_request)
280 GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
282 layout = gtk_widget_create_pango_layout (widget, gtk_accel_label_get_string (accel_label));
283 pango_layout_get_pixel_size (layout, &width, NULL);
284 accel_label->accel_string_width = width;
286 g_object_unref (layout);
290 get_first_baseline (PangoLayout *layout)
292 PangoLayoutIter *iter;
295 iter = pango_layout_get_iter (layout);
296 result = pango_layout_iter_get_baseline (iter);
297 pango_layout_iter_free (iter);
299 return PANGO_PIXELS (result);
303 gtk_accel_label_expose_event (GtkWidget *widget,
304 GdkEventExpose *event)
306 GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (widget);
307 GtkMisc *misc = GTK_MISC (accel_label);
308 GtkTextDirection direction;
310 direction = gtk_widget_get_direction (widget);
312 if (GTK_WIDGET_DRAWABLE (accel_label))
316 ac_width = gtk_accel_label_get_accel_width (accel_label);
318 if (widget->allocation.width >= widget->requisition.width + ac_width)
320 PangoLayout *label_layout;
321 PangoLayout *accel_layout;
326 if (direction == GTK_TEXT_DIR_RTL)
327 widget->allocation.x += ac_width;
328 widget->allocation.width -= ac_width;
329 if (GTK_WIDGET_CLASS (parent_class)->expose_event)
330 GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
331 if (direction == GTK_TEXT_DIR_RTL)
332 widget->allocation.x -= ac_width;
333 widget->allocation.width += ac_width;
335 if (direction == GTK_TEXT_DIR_RTL)
336 x = widget->allocation.x + misc->xpad;
338 x = widget->allocation.x + widget->allocation.width - misc->xpad - ac_width;
340 label_layout = gtk_label_get_layout (GTK_LABEL (accel_label));
341 gtk_label_get_layout_offsets (GTK_LABEL (accel_label), NULL, &y);
343 accel_layout = gtk_widget_create_pango_layout (widget, gtk_accel_label_get_string (accel_label));
345 y += get_first_baseline (label_layout) - get_first_baseline (accel_layout);
347 gtk_paint_layout (widget->style,
349 GTK_WIDGET_STATE (widget),
357 g_object_unref (accel_layout);
361 if (GTK_WIDGET_CLASS (parent_class)->expose_event)
362 GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
370 refetch_widget_accel_closure (GtkAccelLabel *accel_label)
372 GClosure *closure = NULL;
375 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
376 g_return_if_fail (GTK_IS_WIDGET (accel_label->accel_widget));
378 clist = gtk_widget_list_accel_closures (accel_label->accel_widget);
379 for (list = clist; list; list = list->next)
381 /* we just take the first closure used */
382 closure = list->data;
386 gtk_accel_label_set_accel_closure (accel_label, closure);
390 * gtk_accel_label_set_accel_widget:
391 * @accel_label: a #GtkAccelLabel
392 * @accel_widget: the widget to be monitored.
394 * Sets the widget to be monitored by this accelerator label.
397 gtk_accel_label_set_accel_widget (GtkAccelLabel *accel_label,
398 GtkWidget *accel_widget)
400 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
402 g_return_if_fail (GTK_IS_WIDGET (accel_widget));
404 if (accel_widget != accel_label->accel_widget)
406 if (accel_label->accel_widget)
408 gtk_accel_label_set_accel_closure (accel_label, NULL);
409 g_signal_handlers_disconnect_by_func (accel_label->accel_widget,
410 refetch_widget_accel_closure,
412 g_object_unref (accel_label->accel_widget);
414 accel_label->accel_widget = accel_widget;
415 if (accel_label->accel_widget)
417 g_object_ref (accel_label->accel_widget);
418 g_signal_connect_object (accel_label->accel_widget, "accel_closures_changed",
419 G_CALLBACK (refetch_widget_accel_closure),
420 accel_label, G_CONNECT_SWAPPED);
421 refetch_widget_accel_closure (accel_label);
423 g_object_notify (G_OBJECT (accel_label), "accel_widget");
428 gtk_accel_label_reset (GtkAccelLabel *accel_label)
430 if (accel_label->accel_string)
432 g_free (accel_label->accel_string);
433 accel_label->accel_string = NULL;
436 gtk_widget_queue_resize (GTK_WIDGET (accel_label));
440 check_accel_changed (GtkAccelGroup *accel_group,
442 GdkModifierType modifier,
443 GClosure *accel_closure,
444 GtkAccelLabel *accel_label)
446 if (accel_closure == accel_label->accel_closure)
447 gtk_accel_label_reset (accel_label);
451 * gtk_accel_label_set_accel_closure:
452 * @accel_label: a #GtkAccelLabel
453 * @accel_closure: the closure to monitor for accelerator changes.
455 * Sets the closure to be monitored by this accelerator label. The closure
456 * must be connected to an accelerator group; see gtk_accel_group_connect().
459 gtk_accel_label_set_accel_closure (GtkAccelLabel *accel_label,
460 GClosure *accel_closure)
462 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
464 g_return_if_fail (gtk_accel_group_from_accel_closure (accel_closure) != NULL);
466 if (accel_closure != accel_label->accel_closure)
468 if (accel_label->accel_closure)
470 g_signal_handlers_disconnect_by_func (accel_label->accel_group,
473 accel_label->accel_group = NULL;
474 g_closure_unref (accel_label->accel_closure);
476 accel_label->accel_closure = accel_closure;
477 if (accel_label->accel_closure)
479 g_closure_ref (accel_label->accel_closure);
480 accel_label->accel_group = gtk_accel_group_from_accel_closure (accel_closure);
481 g_signal_connect_object (accel_label->accel_group, "accel_changed",
482 G_CALLBACK (check_accel_changed),
485 gtk_accel_label_reset (accel_label);
486 g_object_notify (G_OBJECT (accel_label), "accel_closure");
491 find_accel (GtkAccelKey *key,
495 return data == (gpointer) closure;
499 gtk_accel_label_get_string (GtkAccelLabel *accel_label)
501 if (!accel_label->accel_string)
502 gtk_accel_label_refetch (accel_label);
504 return accel_label->accel_string;
507 /* Underscores in key names are better displayed as spaces
508 * E.g., Page_Up should be "Page Up"
511 substitute_underscores (char *str)
515 for (p = str; *p; p++)
521 gtk_accel_label_refetch (GtkAccelLabel *accel_label)
523 GtkAccelLabelClass *class;
525 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
527 class = GTK_ACCEL_LABEL_GET_CLASS (accel_label);
529 if (accel_label->accel_string)
531 g_free (accel_label->accel_string);
532 accel_label->accel_string = NULL;
535 if (accel_label->accel_closure)
537 GtkAccelKey *key = gtk_accel_group_find (accel_label->accel_group, find_accel, accel_label->accel_closure);
539 if (key && key->accel_flags & GTK_ACCEL_VISIBLE)
542 gboolean seen_mod = FALSE;
545 gstring = g_string_new (accel_label->accel_string);
546 g_string_append (gstring, gstring->len ? class->accel_seperator : " ");
548 if (key->accel_mods & GDK_SHIFT_MASK)
550 g_string_append (gstring, class->mod_name_shift);
553 if (key->accel_mods & GDK_CONTROL_MASK)
556 g_string_append (gstring, class->mod_separator);
557 g_string_append (gstring, class->mod_name_control);
560 if (key->accel_mods & GDK_MOD1_MASK)
563 g_string_append (gstring, class->mod_separator);
564 g_string_append (gstring, class->mod_name_alt);
568 g_string_append (gstring, class->mod_separator);
570 ch = gdk_keyval_to_unicode (key->accel_key);
571 if (ch && (g_unichar_isgraph (ch) || ch == ' ') &&
572 (ch < 0x80 || class->latin1_to_char))
577 g_string_append (gstring, "Space");
580 g_string_append (gstring, "Backslash");
583 g_string_append_unichar (gstring, g_unichar_toupper (ch));
591 tmp = gtk_accelerator_name (key->accel_key, 0);
592 if (tmp[0] != 0 && tmp[1] == 0)
593 tmp[0] = g_ascii_toupper (tmp[0]);
594 substitute_underscores (tmp);
595 g_string_append (gstring, tmp);
598 g_free (accel_label->accel_string);
599 accel_label->accel_string = gstring->str;
600 g_string_free (gstring, FALSE);
602 if (!accel_label->accel_string)
603 accel_label->accel_string = g_strdup ("-/-");
606 if (!accel_label->accel_string)
607 accel_label->accel_string = g_strdup ("");
609 gtk_widget_queue_resize (GTK_WIDGET (accel_label));