1 /* GTK - The GIMP Toolkit
3 * Copyright (C) 2001 Red Hat Software
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
21 #include "gtkcontainer.h"
23 #include "gtkprivate.h"
24 #include "gtksizegroup.h"
31 static void gtk_size_group_set_property (GObject *object,
35 static void gtk_size_group_get_property (GObject *object,
40 static void add_group_to_closure (GtkSizeGroup *group,
41 GtkSizeGroupMode mode,
44 static void add_widget_to_closure (GtkWidget *widget,
45 GtkSizeGroupMode mode,
49 static GQuark size_groups_quark;
50 static const gchar size_groups_tag[] = "gtk-size-groups";
53 get_size_groups (GtkWidget *widget)
55 if (!size_groups_quark)
56 size_groups_quark = g_quark_from_string (size_groups_tag);
58 return g_object_get_qdata (G_OBJECT (widget), size_groups_quark);
62 set_size_groups (GtkWidget *widget,
65 if (!size_groups_quark)
66 size_groups_quark = g_quark_from_string (size_groups_tag);
68 g_object_set_qdata (G_OBJECT (widget), size_groups_quark, groups);
72 add_group_to_closure (GtkSizeGroup *group,
73 GtkSizeGroupMode mode,
79 *groups = g_slist_prepend (*groups, group);
81 tmp_widgets = group->widgets;
84 GtkWidget *tmp_widget = tmp_widgets->data;
86 if (!g_slist_find (*widgets, tmp_widget))
87 add_widget_to_closure (tmp_widget, mode, groups, widgets);
89 tmp_widgets = tmp_widgets->next;
94 add_widget_to_closure (GtkWidget *widget,
95 GtkSizeGroupMode mode,
101 *widgets = g_slist_prepend (*widgets, widget);
103 tmp_groups = get_size_groups (widget);
106 GtkSizeGroup *tmp_group = tmp_groups->data;
108 if ((tmp_group->mode == GTK_SIZE_GROUP_BOTH || tmp_group->mode == mode) &&
109 !g_slist_find (*groups, tmp_group))
110 add_group_to_closure (tmp_group, mode, groups, widgets);
112 tmp_groups = tmp_groups->next;
117 real_queue_resize (GtkWidget *widget)
119 GTK_PRIVATE_SET_FLAG (widget, GTK_ALLOC_NEEDED);
120 GTK_PRIVATE_SET_FLAG (widget, GTK_REQUEST_NEEDED);
123 _gtk_container_queue_resize (GTK_CONTAINER (widget->parent));
124 else if (GTK_WIDGET_TOPLEVEL (widget) && GTK_IS_CONTAINER (widget))
125 _gtk_container_queue_resize (GTK_CONTAINER (widget));
129 reset_group_sizes (GSList *groups)
131 GSList *tmp_list = groups;
134 GtkSizeGroup *tmp_group = tmp_list->data;
136 tmp_group->have_width = FALSE;
137 tmp_group->have_height = FALSE;
139 tmp_list = tmp_list->next;
144 queue_resize_on_widget (GtkWidget *widget,
145 gboolean check_siblings)
147 GtkWidget *parent = widget;
152 GSList *widget_groups;
156 if (widget == parent && !check_siblings)
158 real_queue_resize (widget);
159 parent = parent->parent;
163 widget_groups = get_size_groups (parent);
166 if (widget == parent)
167 real_queue_resize (widget);
169 parent = parent->parent;
176 add_widget_to_closure (parent, GTK_SIZE_GROUP_HORIZONTAL, &groups, &widgets);
177 reset_group_sizes (groups);
182 if (tmp_list->data == parent)
184 if (widget == parent)
185 real_queue_resize (parent);
188 queue_resize_on_widget (tmp_list->data, FALSE);
190 tmp_list = tmp_list->next;
193 g_slist_free (widgets);
194 g_slist_free (groups);
199 add_widget_to_closure (parent, GTK_SIZE_GROUP_VERTICAL, &groups, &widgets);
200 reset_group_sizes (groups);
205 if (tmp_list->data == parent)
207 if (widget == parent)
208 real_queue_resize (parent);
211 queue_resize_on_widget (tmp_list->data, FALSE);
213 tmp_list = tmp_list->next;
216 g_slist_free (widgets);
217 g_slist_free (groups);
219 parent = parent->parent;
224 queue_resize_on_group (GtkSizeGroup *size_group)
226 if (size_group->widgets)
227 queue_resize_on_widget (size_group->widgets->data, TRUE);
231 gtk_size_group_class_init (GtkSizeGroupClass *klass)
233 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
235 gobject_class->set_property = gtk_size_group_set_property;
236 gobject_class->get_property = gtk_size_group_get_property;
238 g_object_class_install_property (gobject_class,
240 g_param_spec_enum ("mode",
242 _("The directions in which the size group effects the requested sizes"
243 " of its component widgets"),
244 GTK_TYPE_SIZE_GROUP_MODE,
245 GTK_SIZE_GROUP_HORIZONTAL,
250 gtk_size_group_init (GtkSizeGroup *size_group)
252 size_group->widgets = NULL;
253 size_group->mode = GTK_SIZE_GROUP_HORIZONTAL;
254 size_group->have_width = 0;
255 size_group->have_height = 0;
259 gtk_size_group_get_type (void)
261 static GType size_group_type = 0;
263 if (!size_group_type)
265 static const GTypeInfo size_group_info =
267 sizeof (GtkSizeGroupClass),
268 NULL, /* base_init */
269 NULL, /* base_finalize */
270 (GClassInitFunc) gtk_size_group_class_init,
271 NULL, /* class_finalize */
272 NULL, /* class_data */
273 sizeof (GtkSizeGroup),
274 16, /* n_preallocs */
275 (GInstanceInitFunc) gtk_size_group_init,
278 size_group_type = g_type_register_static (G_TYPE_OBJECT, "GtkSizeGroup",
279 &size_group_info, 0);
282 return size_group_type;
286 gtk_size_group_set_property (GObject *object,
291 GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
296 gtk_size_group_set_mode (size_group, g_value_get_enum (value));
299 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
305 gtk_size_group_get_property (GObject *object,
310 GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
315 g_value_set_enum (value, size_group->mode);
318 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
324 * gtk_size_group_new:
325 * @mode: the mode for the new size group.
327 * Create a new #GtkSizeGroup.
329 * Return value: a newly created #GtkSizeGroup
332 gtk_size_group_new (GtkSizeGroupMode mode)
334 GtkSizeGroup *size_group = g_object_new (GTK_TYPE_SIZE_GROUP, NULL);
336 size_group->mode = mode;
342 * gtk_size_group_set_mode:
343 * @size_group: a #GtkSizeGroup
344 * @mode: the mode to set for the size group.
346 * Sets the #GtkSizeGroupMode of the size group. The mode of the size
347 * group determines whether the widgets in the size group should
348 * all have the same horizontal requisition (%GTK_SIZE_GROUP_MODE_HORIZONTAL)
349 * all have the same vertical requisition (%GTK_SIZE_GROUP_MODE_VERTICAL),
350 * or should all have the same requisition in both directions
351 * (%GTK_SIZE_GROUP_MODE_BOTH).
354 gtk_size_group_set_mode (GtkSizeGroup *size_group,
355 GtkSizeGroupMode mode)
357 g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
359 if (size_group->mode != mode)
361 if (size_group->mode != GTK_SIZE_GROUP_NONE)
362 queue_resize_on_group (size_group);
363 size_group->mode = mode;
364 if (size_group->mode != GTK_SIZE_GROUP_NONE)
365 queue_resize_on_group (size_group);
367 g_object_notify (G_OBJECT (size_group), "mode");
372 * gtk_size_group_get_mode:
373 * @size_group: a #GtkSizeGroup
375 * Gets the current mode of the size group. See gtk_size_group_set_mode().
377 * Return value: the current mode of the size group.
380 gtk_size_group_get_mode (GtkSizeGroup *size_group)
382 g_return_val_if_fail (GTK_IS_SIZE_GROUP (size_group), GTK_SIZE_GROUP_BOTH);
384 return size_group->mode;
388 gtk_size_group_widget_destroyed (GtkWidget *widget,
389 GtkSizeGroup *size_group)
391 gtk_size_group_remove_widget (size_group, widget);
395 * gtk_size_group_add_widget:
396 * @size_group: a #GtkSizeGroup
397 * @widget: the #GtkWidget to add
399 * Adds a widget to a #GtkSizeGroup. In the future, the requisition
400 * of the widget will be determined as the maximum of its requisition
401 * and the requisition of the other widgets in the size group.
402 * Whether this applies horizontally, vertically, or in both directions
403 * depends on the mode of the size group. See gtk_size_group_set_mode().
406 gtk_size_group_add_widget (GtkSizeGroup *size_group,
411 g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
412 g_return_if_fail (GTK_IS_WIDGET (widget));
414 groups = get_size_groups (widget);
416 if (!g_slist_find (groups, widget))
418 groups = g_slist_prepend (groups, size_group);
419 set_size_groups (widget, groups);
421 size_group->widgets = g_slist_prepend (size_group->widgets, widget);
423 g_signal_connect (widget, "destroy",
424 G_CALLBACK (gtk_size_group_widget_destroyed),
427 g_object_ref (size_group);
430 queue_resize_on_group (size_group);
434 * gtk_size_group_remove_widget:
435 * @size_group: a #GtkSizeGrup
436 * @widget: the #GtkWidget to remove
438 * Removes a widget from a #GtkSizeGroup.
441 gtk_size_group_remove_widget (GtkSizeGroup *size_group,
446 g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
447 g_return_if_fail (GTK_IS_WIDGET (widget));
448 g_return_if_fail (g_slist_find (size_group->widgets, widget));
450 g_signal_handlers_disconnect_by_func (widget,
451 gtk_size_group_widget_destroyed,
454 groups = get_size_groups (widget);
455 groups = g_slist_remove (groups, size_group);
456 set_size_groups (widget, groups);
458 size_group->widgets = g_slist_remove (size_group->widgets, widget);
459 queue_resize_on_group (size_group);
460 gtk_widget_queue_resize (widget);
462 g_object_unref (size_group);
466 get_base_dimension (GtkWidget *widget,
467 GtkSizeGroupMode mode)
469 GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE);
471 if (mode == GTK_SIZE_GROUP_HORIZONTAL)
473 if (aux_info && aux_info->width > 0)
474 return aux_info->width;
476 return widget->requisition.width;
480 if (aux_info && aux_info->height > 0)
481 return aux_info->height;
483 return widget->requisition.height;
488 do_size_request (GtkWidget *widget)
490 if (GTK_WIDGET_REQUEST_NEEDED (widget))
492 gtk_widget_ensure_style (widget);
493 g_signal_emit_by_name (widget,
495 &widget->requisition);
497 GTK_PRIVATE_UNSET_FLAG (widget, GTK_REQUEST_NEEDED);
502 compute_base_dimension (GtkWidget *widget,
503 GtkSizeGroupMode mode)
505 do_size_request (widget);
507 return get_base_dimension (widget, mode);
511 compute_dimension (GtkWidget *widget,
512 GtkSizeGroupMode mode)
514 GSList *widgets = NULL;
515 GSList *groups = NULL;
519 add_widget_to_closure (widget, mode, &groups, &widgets);
521 g_slist_foreach (widgets, (GFunc)g_object_ref, NULL);
525 result = compute_base_dimension (widget, mode);
529 GtkSizeGroup *group = groups->data;
531 if (mode == GTK_SIZE_GROUP_HORIZONTAL && group->have_width)
532 result = group->requisition.width;
533 else if (mode == GTK_SIZE_GROUP_VERTICAL && group->have_height)
534 result = group->requisition.height;
540 GtkWidget *tmp_widget = tmp_list->data;
542 gint dimension = compute_base_dimension (tmp_widget, mode);
544 if (dimension > result)
547 tmp_list = tmp_list->next;
553 GtkSizeGroup *tmp_group = tmp_list->data;
555 if (mode == GTK_SIZE_GROUP_HORIZONTAL)
557 tmp_group->have_width = TRUE;
558 tmp_group->requisition.width = result;
562 tmp_group->have_height = TRUE;
563 tmp_group->requisition.height = result;
566 tmp_list = tmp_list->next;
571 g_slist_foreach (widgets, (GFunc)g_object_unref, NULL);
573 g_slist_free (widgets);
574 g_slist_free (groups);
580 get_dimension (GtkWidget *widget,
581 GtkSizeGroupMode mode)
583 GSList *widgets = NULL;
584 GSList *groups = NULL;
587 add_widget_to_closure (widget, mode, &groups, &widgets);
591 result = get_base_dimension (widget, mode);
595 GtkSizeGroup *group = groups->data;
597 if (mode == GTK_SIZE_GROUP_HORIZONTAL && group->have_width)
598 result = group->requisition.width;
599 else if (mode == GTK_SIZE_GROUP_VERTICAL && group->have_height)
600 result = group->requisition.height;
603 g_slist_free (widgets);
604 g_slist_free (groups);
610 get_fast_child_requisition (GtkWidget *widget,
611 GtkRequisition *requisition)
613 GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE);
615 *requisition = widget->requisition;
619 if (aux_info->width > 0)
620 requisition->width = aux_info->width;
621 if (aux_info && aux_info->height > 0)
622 requisition->height = aux_info->height;
627 * _gtk_size_group_get_child_requisition:
628 * @widget: a #GtkWidget
629 * @requisition: location to store computed requisition.
631 * Retrieve the "child requisition" of the widget, taking account grouping
632 * of the widget's requisition with other widgets.
635 _gtk_size_group_get_child_requisition (GtkWidget *widget,
636 GtkRequisition *requisition)
640 if (get_size_groups (widget))
642 requisition->width = get_dimension (widget, GTK_SIZE_GROUP_HORIZONTAL);
643 requisition->height = get_dimension (widget, GTK_SIZE_GROUP_VERTICAL);
645 /* Only do the full computation if we actually have size groups */
648 get_fast_child_requisition (widget, requisition);
653 * _gtk_size_group_compute_requisition:
654 * @widget: a #GtkWidget
655 * @requisition: location to store computed requisition.
657 * Compute the requisition of a widget taking into account grouping of
658 * the widget's requisition with other widgets.
661 _gtk_size_group_compute_requisition (GtkWidget *widget,
662 GtkRequisition *requisition)
667 if (get_size_groups (widget))
669 /* Only do the full computation if we actually have size groups */
671 width = compute_dimension (widget, GTK_SIZE_GROUP_HORIZONTAL);
672 height = compute_dimension (widget, GTK_SIZE_GROUP_VERTICAL);
676 requisition->width = width;
677 requisition->height = height;
682 do_size_request (widget);
685 get_fast_child_requisition (widget, requisition);
690 * _gtk_size_group_queue_resize:
691 * @widget: a #GtkWidget
693 * Queue a resize on a widget, and on all other widgets grouped with this widget.
696 _gtk_size_group_queue_resize (GtkWidget *widget)
698 queue_resize_on_widget (widget, TRUE);