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/.
29 #include "gtkaccellabel.h"
30 #include "gtkaccelmap.h"
32 #include "gtksignal.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 gboolean gtk_accel_label_refetch_idle (GtkAccelLabel *accel_label);
62 static GtkAccelLabelClass *accel_label_class = NULL;
63 static GtkLabelClass *parent_class = NULL;
67 gtk_accel_label_get_type (void)
69 static GtkType accel_label_type = 0;
71 if (!accel_label_type)
73 static const GtkTypeInfo accel_label_info =
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,
85 accel_label_type = gtk_type_unique (GTK_TYPE_LABEL, &accel_label_info);
88 return accel_label_type;
92 gtk_accel_label_class_init (GtkAccelLabelClass *class)
94 GObjectClass *gobject_class = G_OBJECT_CLASS (class);
95 GtkObjectClass *object_class = GTK_OBJECT_CLASS (class);
96 GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
98 accel_label_class = class;
99 parent_class = g_type_class_peek_parent (class);
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;
105 object_class->destroy = gtk_accel_label_destroy;
107 widget_class->size_request = gtk_accel_label_size_request;
108 widget_class->expose_event = gtk_accel_label_expose_event;
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;
119 g_object_class_install_property (G_OBJECT_CLASS (object_class),
121 g_param_spec_boxed ("accel_closure",
122 _("Accelerator Closure"),
123 _("The closure to be monitored for accelerator changes"),
125 G_PARAM_READABLE | G_PARAM_WRITABLE));
126 g_object_class_install_property (G_OBJECT_CLASS (object_class),
128 g_param_spec_object ("accel_widget",
129 _("Accelerator Widget"),
130 _("The widget to be monitored for accelerator changes"),
132 G_PARAM_READABLE | G_PARAM_WRITABLE));
136 gtk_accel_label_set_property (GObject *object,
141 GtkAccelLabel *accel_label;
143 accel_label = GTK_ACCEL_LABEL (object);
147 case PROP_ACCEL_CLOSURE:
148 gtk_accel_label_set_accel_closure (accel_label, g_value_get_boxed (value));
150 case PROP_ACCEL_WIDGET:
151 gtk_accel_label_set_accel_widget (accel_label, g_value_get_object (value));
154 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
160 gtk_accel_label_get_property (GObject *object,
165 GtkAccelLabel *accel_label;
167 accel_label = GTK_ACCEL_LABEL (object);
171 case PROP_ACCEL_CLOSURE:
172 g_value_set_boxed (value, accel_label->accel_closure);
174 case PROP_ACCEL_WIDGET:
175 g_value_set_object (value, accel_label->accel_widget);
178 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
184 gtk_accel_label_init (GtkAccelLabel *accel_label)
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;
193 gtk_accel_label_refetch (accel_label);
197 gtk_accel_label_new (const gchar *string)
199 GtkAccelLabel *accel_label;
201 g_return_val_if_fail (string != NULL, NULL);
203 accel_label = gtk_type_new (GTK_TYPE_ACCEL_LABEL);
205 gtk_label_set_text (GTK_LABEL (accel_label), string);
207 return GTK_WIDGET (accel_label);
211 gtk_accel_label_destroy (GtkObject *object)
213 GtkAccelLabel *accel_label;
215 g_return_if_fail (GTK_IS_ACCEL_LABEL (object));
217 accel_label = GTK_ACCEL_LABEL (object);
219 gtk_accel_label_set_accel_widget (accel_label, NULL);
220 gtk_accel_label_set_accel_closure (accel_label, NULL);
222 GTK_OBJECT_CLASS (parent_class)->destroy (object);
226 gtk_accel_label_finalize (GObject *object)
228 GtkAccelLabel *accel_label = GTK_ACCEL_LABEL (object);
230 if (accel_label->queue_id)
232 gtk_idle_remove (accel_label->queue_id);
233 accel_label->queue_id = 0;
235 g_free (accel_label->accel_string);
237 G_OBJECT_CLASS (parent_class)->finalize (object);
241 * gtk_accel_label_get_accel_widget:
242 * @accel_label: a #GtkAccelLabel
244 * Fetches the widget monitored by this accelerator label. See
245 * gtk_accel_label_set_accel_widget().
247 * Return value: the object monitored by the accelerator label,
251 gtk_accel_label_get_accel_widget (GtkAccelLabel *accel_label)
253 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), NULL);
255 return accel_label->accel_widget;
259 gtk_accel_label_get_accel_width (GtkAccelLabel *accel_label)
261 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), 0);
263 return (accel_label->accel_string_width +
264 (accel_label->accel_string_width ? accel_label->accel_padding : 0));
268 gtk_accel_label_size_request (GtkWidget *widget,
269 GtkRequisition *requisition)
271 GtkAccelLabel *accel_label;
275 g_return_if_fail (GTK_IS_ACCEL_LABEL (widget));
276 g_return_if_fail (requisition != NULL);
278 accel_label = GTK_ACCEL_LABEL (widget);
280 if (GTK_WIDGET_CLASS (parent_class)->size_request)
281 GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
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;
287 g_object_unref (G_OBJECT (layout));
291 gtk_accel_label_expose_event (GtkWidget *widget,
292 GdkEventExpose *event)
295 GtkAccelLabel *accel_label;
298 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (widget), FALSE);
299 g_return_val_if_fail (event != NULL, FALSE);
301 accel_label = GTK_ACCEL_LABEL (widget);
302 misc = GTK_MISC (accel_label);
304 if (GTK_WIDGET_DRAWABLE (accel_label))
308 ac_width = gtk_accel_label_get_accel_width (accel_label);
310 if (widget->allocation.width >= widget->requisition.width + ac_width)
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;
320 x = widget->allocation.x + widget->allocation.width - misc->xpad - ac_width;
322 y = (widget->allocation.y * (1.0 - misc->yalign) +
323 (widget->allocation.y + widget->allocation.height -
324 (widget->requisition.height - misc->ypad * 2)) *
327 layout = gtk_widget_create_pango_layout (widget, accel_label->accel_string);
329 gtk_paint_layout (widget->style,
331 GTK_WIDGET_STATE (widget),
339 g_object_unref (G_OBJECT (layout));
343 if (GTK_WIDGET_CLASS (parent_class)->expose_event)
344 GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
352 refetch_widget_accel_closure (GtkAccelLabel *accel_label)
354 GClosure *closure = NULL;
357 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
358 g_return_if_fail (GTK_IS_WIDGET (accel_label->accel_widget));
360 clist = gtk_widget_list_accel_closures (accel_label->accel_widget);
361 for (list = clist; list; list = list->next)
363 /* we just take the first closure used */
364 closure = list->data;
368 gtk_accel_label_set_accel_closure (accel_label, closure);
372 * gtk_accel_label_set_accel_widget:
373 * @accel_label: a #GtkAccelLabel
374 * @accel_widget: the widget to be monitored.
376 * Sets the widget to be monitored by this accelerator label.
379 gtk_accel_label_set_accel_widget (GtkAccelLabel *accel_label,
380 GtkWidget *accel_widget)
382 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
384 g_return_if_fail (GTK_IS_WIDGET (accel_widget));
386 if (accel_widget != accel_label->accel_widget)
388 if (accel_label->accel_widget)
390 gtk_accel_label_set_accel_closure (accel_label, NULL);
391 g_signal_handlers_disconnect_by_func (accel_label->accel_widget,
392 G_CALLBACK (refetch_widget_accel_closure),
394 g_object_unref (accel_label->accel_widget);
396 accel_label->accel_widget = accel_widget;
397 if (accel_label->accel_widget)
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);
405 g_object_notify (G_OBJECT (accel_label), "accel_widget");
410 gtk_accel_label_queue_refetch (GtkAccelLabel *accel_label)
412 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
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,
421 check_accel_changed (GtkAccelGroup *accel_group,
423 GdkModifierType modifier,
424 GClosure *accel_closure,
425 GtkAccelLabel *accel_label)
427 if (accel_closure == accel_label->accel_closure)
428 gtk_accel_label_queue_refetch (accel_label);
432 gtk_accel_label_set_accel_closure (GtkAccelLabel *accel_label,
433 GClosure *accel_closure)
435 g_return_if_fail (GTK_IS_ACCEL_LABEL (accel_label));
437 g_return_if_fail (gtk_accel_group_from_accel_closure (accel_closure) != NULL);
439 if (accel_closure != accel_label->accel_closure)
441 if (accel_label->accel_closure)
443 g_signal_handlers_disconnect_by_func (accel_label->accel_group,
444 G_CALLBACK (check_accel_changed),
446 accel_label->accel_group = NULL;
447 g_closure_unref (accel_label->accel_closure);
449 accel_label->accel_closure = accel_closure;
450 if (accel_label->accel_closure)
452 g_closure_ref (accel_label->accel_closure);
453 accel_label->accel_group = gtk_accel_group_from_accel_closure (accel_closure);
454 g_signal_connect_object (accel_label->accel_group, "accel_changed",
455 G_CALLBACK (check_accel_changed),
458 gtk_accel_label_queue_refetch (accel_label);
459 g_object_notify (G_OBJECT (accel_label), "accel_closure");
464 gtk_accel_label_refetch_idle (GtkAccelLabel *accel_label)
468 GDK_THREADS_ENTER ();
469 retval = gtk_accel_label_refetch (accel_label);
470 GDK_THREADS_LEAVE ();
476 find_accel (GtkAccelKey *key,
480 return data == (gpointer) closure;
484 gtk_accel_label_refetch (GtkAccelLabel *accel_label)
486 GtkAccelLabelClass *class;
488 g_return_val_if_fail (GTK_IS_ACCEL_LABEL (accel_label), FALSE);
490 class = GTK_ACCEL_LABEL_GET_CLASS (accel_label);
492 g_free (accel_label->accel_string);
493 accel_label->accel_string = NULL;
495 if (accel_label->accel_closure)
497 GtkAccelKey *key = gtk_accel_group_find (accel_label->accel_group, find_accel, accel_label->accel_closure);
499 if (key && key->accel_flags & GTK_ACCEL_VISIBLE)
502 gboolean seen_mod = FALSE;
504 gstring = g_string_new (accel_label->accel_string);
505 g_string_append (gstring, gstring->len ? class->accel_seperator : " ");
507 if (key->accel_mods & GDK_SHIFT_MASK)
509 g_string_append (gstring, class->mod_name_shift);
512 if (key->accel_mods & GDK_CONTROL_MASK)
515 g_string_append (gstring, class->mod_separator);
516 g_string_append (gstring, class->mod_name_control);
519 if (key->accel_mods & GDK_MOD1_MASK)
522 g_string_append (gstring, class->mod_separator);
523 g_string_append (gstring, class->mod_name_alt);
527 g_string_append (gstring, class->mod_separator);
528 if (key->accel_key < 0x80 ||
529 (key->accel_key > 0x80 &&
530 key->accel_key <= 0xff &&
531 class->latin1_to_char))
533 switch (key->accel_key)
536 g_string_append (gstring, "Space");
539 g_string_append (gstring, "Backslash");
542 g_string_append_unichar (gstring, toupper (key->accel_key));
550 tmp = gtk_accelerator_name (key->accel_key, 0);
551 if (tmp[0] != 0 && tmp[1] == 0)
552 tmp[0] = toupper (tmp[0]);
553 g_string_append (gstring, tmp);
556 g_free (accel_label->accel_string);
557 accel_label->accel_string = gstring->str;
558 g_string_free (gstring, FALSE);
560 if (!accel_label->accel_string)
561 accel_label->accel_string = g_strdup ("-/-");
564 if (!accel_label->accel_string)
565 accel_label->accel_string = g_strdup ("");
567 if (accel_label->queue_id)
569 gtk_idle_remove (accel_label->queue_id);
570 accel_label->queue_id = 0;
573 gtk_widget_queue_resize (GTK_WIDGET (accel_label));