2010-06-18 04:11:26 +00:00
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/* gtksizerequest.c
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2010-04-20 22:53:54 +00:00
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* Copyright (C) 2007-2010 Openismus GmbH
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2009-12-02 08:48:42 +00:00
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*
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2010-04-20 22:53:54 +00:00
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* Authors:
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2009-12-02 08:48:42 +00:00
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* Mathias Hasselmann <mathias@openismus.com>
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2010-04-20 22:53:54 +00:00
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* Tristan Van Berkom <tristan.van.berkom@gmail.com>
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2009-12-02 08:48:42 +00:00
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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2012-02-27 13:01:10 +00:00
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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2009-12-02 08:48:42 +00:00
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*/
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#include <config.h>
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2010-10-19 17:14:46 +00:00
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2010-06-18 04:11:26 +00:00
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#include "gtksizerequest.h"
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2010-10-19 17:14:46 +00:00
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2010-09-18 23:57:32 +00:00
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#include "gtkdebug.h"
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2009-12-02 08:48:42 +00:00
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#include "gtkintl.h"
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2010-10-19 17:14:46 +00:00
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#include "gtkprivate.h"
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#include "gtksizegroup-private.h"
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2012-11-13 12:41:05 +00:00
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#include "gtksizerequestcacheprivate.h"
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2010-10-19 17:14:46 +00:00
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#include "gtkwidgetprivate.h"
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2009-12-02 08:48:42 +00:00
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2011-03-05 10:29:10 +00:00
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2015-09-09 01:06:38 +00:00
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#ifdef G_ENABLE_CONSISTENCY_CHECKS
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2011-03-06 06:13:56 +00:00
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static GQuark recursion_check_quark = 0;
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static void
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push_recursion_check (GtkWidget *widget,
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2012-11-14 00:25:21 +00:00
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GtkOrientation orientation,
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2011-03-06 06:13:56 +00:00
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gint for_size)
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{
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const char *previous_method;
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const char *method;
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if (recursion_check_quark == 0)
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recursion_check_quark = g_quark_from_static_string ("gtk-size-request-in-progress");
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previous_method = g_object_get_qdata (G_OBJECT (widget), recursion_check_quark);
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2012-11-14 00:25:21 +00:00
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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2011-03-06 06:13:56 +00:00
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{
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method = for_size < 0 ? "get_width" : "get_width_for_height";
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}
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else
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{
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method = for_size < 0 ? "get_height" : "get_height_for_width";
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}
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if (previous_method != NULL)
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{
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g_warning ("%s %p: widget tried to gtk_widget_%s inside "
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" GtkWidget ::%s implementation. "
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"Should just invoke GTK_WIDGET_GET_CLASS(widget)->%s "
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"directly rather than using gtk_widget_%s",
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G_OBJECT_TYPE_NAME (widget), widget,
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method, previous_method,
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method, method);
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}
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g_object_set_qdata (G_OBJECT (widget), recursion_check_quark, (char*) method);
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}
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static void
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pop_recursion_check (GtkWidget *widget,
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2012-11-14 00:25:21 +00:00
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GtkOrientation orientation)
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2011-03-06 06:13:56 +00:00
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{
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g_object_set_qdata (G_OBJECT (widget), recursion_check_quark, NULL);
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}
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2015-09-09 01:06:38 +00:00
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#else
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#define push_recursion_check(widget, orientation, for_size)
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#define pop_recursion_check(widget, orientation)
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#endif /* G_ENABLE_CONSISTENCY_CHECKS */
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2011-03-06 06:13:56 +00:00
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2012-11-04 15:02:14 +00:00
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static void
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2012-11-04 15:10:20 +00:00
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gtk_widget_query_size_for_orientation (GtkWidget *widget,
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2012-11-14 00:25:21 +00:00
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GtkOrientation orientation,
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2012-11-04 15:10:20 +00:00
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gint for_size,
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gint *minimum_size,
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2013-03-05 13:54:03 +00:00
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gint *natural_size,
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gint *minimum_baseline,
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gint *natural_baseline)
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2012-11-04 15:02:14 +00:00
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{
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2012-11-14 00:10:21 +00:00
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SizeRequestCache *cache;
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2013-03-05 13:54:03 +00:00
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GtkWidgetClass *widget_class;
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2012-11-14 00:10:21 +00:00
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gint min_size = 0;
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gint nat_size = 0;
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2013-03-05 13:54:03 +00:00
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gint min_baseline = -1;
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gint nat_baseline = -1;
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2012-11-14 00:10:21 +00:00
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gboolean found_in_cache;
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2010-04-28 14:04:21 +00:00
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2015-09-28 00:19:25 +00:00
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gtk_widget_ensure_resize (widget);
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2012-11-14 13:03:47 +00:00
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if (gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_CONSTANT_SIZE)
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for_size = -1;
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2012-11-14 00:10:21 +00:00
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cache = _gtk_widget_peek_request_cache (widget);
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found_in_cache = _gtk_size_request_cache_lookup (cache,
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orientation,
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for_size,
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&min_size,
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2013-03-05 13:54:03 +00:00
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&nat_size,
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&min_baseline,
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&nat_baseline);
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widget_class = GTK_WIDGET_GET_CLASS (widget);
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2012-11-14 00:10:21 +00:00
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2010-04-17 05:51:10 +00:00
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if (!found_in_cache)
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{
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2011-03-06 06:13:56 +00:00
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gint adjusted_min, adjusted_natural, adjusted_for_size = for_size;
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2010-04-17 05:51:10 +00:00
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2012-11-14 00:25:21 +00:00
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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2010-04-24 01:52:55 +00:00
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{
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2012-11-14 13:03:47 +00:00
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if (for_size < 0)
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2010-10-22 15:04:46 +00:00
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{
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2010-10-26 14:53:46 +00:00
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push_recursion_check (widget, orientation, for_size);
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2016-10-22 14:06:14 +00:00
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widget_class->measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
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&min_size, &nat_size, NULL, NULL);
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2010-10-26 14:53:46 +00:00
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pop_recursion_check (widget, orientation);
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2010-10-22 15:04:46 +00:00
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}
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2010-04-24 01:52:55 +00:00
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else
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2010-10-22 15:04:46 +00:00
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{
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2010-12-07 14:45:48 +00:00
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gint ignored_position = 0;
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gint minimum_height;
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gint natural_height;
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2010-10-22 15:04:46 +00:00
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2017-01-16 17:47:31 +00:00
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/* Pull the base natural height from the cache as it's needed to adjust
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* the proposed 'for_size' */
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gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL, -1,
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&minimum_height, &natural_height,
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NULL, NULL);
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2010-10-22 15:04:46 +00:00
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/* convert for_size to unadjusted height (for_size is a proposed allocation) */
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2016-11-23 16:46:44 +00:00
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gtk_widget_adjust_size_allocation (widget,
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GTK_ORIENTATION_VERTICAL,
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&minimum_height,
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&natural_height,
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&ignored_position,
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&adjusted_for_size);
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2010-10-26 14:53:46 +00:00
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push_recursion_check (widget, orientation, for_size);
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2016-10-22 14:06:14 +00:00
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widget_class->measure (widget,
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GTK_ORIENTATION_HORIZONTAL,
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MAX (adjusted_for_size, minimum_height),
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&min_size, &nat_size,
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NULL, NULL);
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2010-10-26 14:53:46 +00:00
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pop_recursion_check (widget, orientation);
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2010-10-22 15:04:46 +00:00
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}
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2010-04-24 01:52:55 +00:00
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}
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2010-04-17 05:51:10 +00:00
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else
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2010-04-24 01:52:55 +00:00
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{
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2012-11-14 13:03:47 +00:00
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if (for_size < 0)
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2010-10-22 15:04:46 +00:00
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{
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2010-10-26 14:53:46 +00:00
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push_recursion_check (widget, orientation, for_size);
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2016-10-22 14:06:14 +00:00
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widget_class->measure (widget,
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GTK_ORIENTATION_VERTICAL,
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-1,
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&min_size, &nat_size,
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&min_baseline, &nat_baseline);
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2010-10-26 14:53:46 +00:00
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pop_recursion_check (widget, orientation);
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2010-10-22 15:04:46 +00:00
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}
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2010-04-24 01:52:55 +00:00
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else
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2010-10-22 15:04:46 +00:00
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{
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2011-03-06 06:13:56 +00:00
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gint ignored_position = 0;
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gint minimum_width;
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gint natural_width;
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2010-10-22 15:04:46 +00:00
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2017-01-16 17:47:31 +00:00
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/* Pull the base natural width from the cache as it's needed to adjust
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* the proposed 'for_size' */
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gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
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&minimum_width, &natural_width,
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NULL, NULL);
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2010-10-22 15:04:46 +00:00
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/* convert for_size to unadjusted width (for_size is a proposed allocation) */
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2016-11-23 16:46:44 +00:00
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gtk_widget_adjust_size_allocation (widget,
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GTK_ORIENTATION_HORIZONTAL,
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&minimum_width,
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&natural_width,
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&ignored_position,
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&adjusted_for_size);
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2010-10-26 14:53:46 +00:00
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push_recursion_check (widget, orientation, for_size);
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2016-10-22 14:06:14 +00:00
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widget_class->measure (widget,
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GTK_ORIENTATION_VERTICAL,
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MAX (adjusted_for_size, minimum_width),
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&min_size, &nat_size,
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&min_baseline, &nat_baseline);
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2010-10-26 14:53:46 +00:00
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pop_recursion_check (widget, orientation);
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2010-10-22 15:04:46 +00:00
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}
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2010-04-24 01:52:55 +00:00
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}
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2010-04-17 05:51:10 +00:00
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2017-03-05 13:59:19 +00:00
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if (G_UNLIKELY (min_size > nat_size))
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2010-09-06 01:46:22 +00:00
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{
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2017-03-05 13:59:19 +00:00
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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{
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g_warning ("%s %p reported min width %d and natural width %d in measure() with for_size=%d; natural size must be >= min size",
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G_OBJECT_TYPE_NAME (widget), widget, min_size, nat_size, for_size);
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}
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else
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{
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g_warning ("%s %p reported min height %d and natural height %d in measure() with for_size=%d; natural size must be >= min size",
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G_OBJECT_TYPE_NAME (widget), widget, min_size, nat_size, for_size);
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}
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2010-09-06 01:46:22 +00:00
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}
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2011-03-06 06:13:56 +00:00
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adjusted_min = min_size;
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adjusted_natural = nat_size;
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2016-11-23 16:46:44 +00:00
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gtk_widget_adjust_size_request (widget, orientation,
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&adjusted_min, &adjusted_natural);
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2010-09-05 16:19:14 +00:00
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2011-03-06 06:13:56 +00:00
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if (adjusted_min < min_size ||
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adjusted_natural < nat_size)
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2010-09-05 16:19:14 +00:00
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{
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g_warning ("%s %p adjusted size %s min %d natural %d must not decrease below min %d natural %d",
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2010-10-26 14:53:46 +00:00
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G_OBJECT_TYPE_NAME (widget), widget,
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2012-11-14 00:25:21 +00:00
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orientation == GTK_ORIENTATION_VERTICAL ? "vertical" : "horizontal",
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2010-09-05 16:19:14 +00:00
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adjusted_min, adjusted_natural,
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2011-03-06 06:13:56 +00:00
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min_size, nat_size);
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2010-09-05 16:19:14 +00:00
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/* don't use the adjustment */
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}
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else if (adjusted_min > adjusted_natural)
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{
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g_warning ("%s %p adjusted size %s min %d natural %d original min %d natural %d has min greater than natural",
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2010-10-26 14:53:46 +00:00
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G_OBJECT_TYPE_NAME (widget), widget,
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2012-11-14 00:25:21 +00:00
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orientation == GTK_ORIENTATION_VERTICAL ? "vertical" : "horizontal",
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2010-09-05 16:19:14 +00:00
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adjusted_min, adjusted_natural,
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2011-03-06 06:13:56 +00:00
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min_size, nat_size);
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2010-09-05 16:19:14 +00:00
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/* don't use the adjustment */
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}
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else
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{
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/* adjustment looks good */
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2011-03-06 06:13:56 +00:00
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min_size = adjusted_min;
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nat_size = adjusted_natural;
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2010-09-05 16:19:14 +00:00
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}
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2013-03-05 13:54:03 +00:00
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if (min_baseline != -1 || nat_baseline != -1)
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{
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if (orientation == GTK_ORIENTATION_HORIZONTAL)
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{
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g_warning ("%s %p reported a horizontal baseline",
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G_OBJECT_TYPE_NAME (widget), widget);
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min_baseline = -1;
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nat_baseline = -1;
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}
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else if (min_baseline == -1 || nat_baseline == -1)
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|
|
{
|
|
|
|
|
g_warning ("%s %p reported baseline for only one of min/natural (min: %d, natural: %d)",
|
|
|
|
|
G_OBJECT_TYPE_NAME (widget), widget,
|
|
|
|
|
min_baseline, nat_baseline);
|
|
|
|
|
min_baseline = -1;
|
|
|
|
|
nat_baseline = -1;
|
|
|
|
|
}
|
2017-03-05 14:18:32 +00:00
|
|
|
|
else if (gtk_widget_get_valign (widget) != GTK_ALIGN_BASELINE)
|
2013-03-05 13:54:03 +00:00
|
|
|
|
{
|
|
|
|
|
/* Ignore requested baseline for non-aligned widgets */
|
|
|
|
|
min_baseline = -1;
|
|
|
|
|
nat_baseline = -1;
|
|
|
|
|
}
|
|
|
|
|
else
|
2016-11-23 16:46:44 +00:00
|
|
|
|
gtk_widget_adjust_baseline_request (widget, &min_baseline, &nat_baseline);
|
2013-03-05 13:54:03 +00:00
|
|
|
|
}
|
|
|
|
|
|
2012-11-14 00:10:21 +00:00
|
|
|
|
_gtk_size_request_cache_commit (cache,
|
2012-11-13 23:55:50 +00:00
|
|
|
|
orientation,
|
|
|
|
|
for_size,
|
|
|
|
|
min_size,
|
2013-03-05 13:54:03 +00:00
|
|
|
|
nat_size,
|
|
|
|
|
min_baseline,
|
|
|
|
|
nat_baseline);
|
2011-03-06 06:13:56 +00:00
|
|
|
|
}
|
2010-04-17 05:51:10 +00:00
|
|
|
|
|
|
|
|
|
if (minimum_size)
|
2011-03-06 06:13:56 +00:00
|
|
|
|
*minimum_size = min_size;
|
2010-04-28 14:04:21 +00:00
|
|
|
|
|
2010-04-17 05:51:10 +00:00
|
|
|
|
if (natural_size)
|
2011-03-06 06:13:56 +00:00
|
|
|
|
*natural_size = nat_size;
|
2010-04-17 05:51:10 +00:00
|
|
|
|
|
2013-03-05 13:54:03 +00:00
|
|
|
|
if (minimum_baseline)
|
|
|
|
|
*minimum_baseline = min_baseline;
|
|
|
|
|
|
|
|
|
|
if (natural_baseline)
|
|
|
|
|
*natural_baseline = nat_baseline;
|
|
|
|
|
|
2011-03-06 06:13:56 +00:00
|
|
|
|
g_assert (min_size <= nat_size);
|
2010-04-17 05:51:10 +00:00
|
|
|
|
|
2016-02-28 20:33:18 +00:00
|
|
|
|
GTK_NOTE (SIZE_REQUEST, {
|
|
|
|
|
GString *s;
|
|
|
|
|
|
|
|
|
|
s = g_string_new ("");
|
|
|
|
|
g_string_append_printf (s, "[%p] %s\t%s: %d is minimum %d and natural: %d",
|
|
|
|
|
widget, G_OBJECT_TYPE_NAME (widget),
|
|
|
|
|
orientation == GTK_ORIENTATION_HORIZONTAL
|
|
|
|
|
? "width for height"
|
|
|
|
|
: "height for width",
|
|
|
|
|
for_size, min_size, nat_size);
|
2013-03-05 13:54:03 +00:00
|
|
|
|
if (min_baseline != -1 || nat_baseline != -1)
|
2016-08-25 21:01:28 +00:00
|
|
|
|
{
|
|
|
|
|
g_string_append_printf (s, ", baseline %d/%d",
|
|
|
|
|
min_baseline, nat_baseline);
|
|
|
|
|
}
|
2016-02-28 20:33:18 +00:00
|
|
|
|
g_string_append_printf (s, " (hit cache: %s)\n",
|
|
|
|
|
found_in_cache ? "yes" : "no");
|
|
|
|
|
g_message ("%s", s->str);
|
|
|
|
|
g_string_free (s, TRUE);
|
|
|
|
|
});
|
2012-11-04 15:10:20 +00:00
|
|
|
|
}
|
|
|
|
|
|
2016-11-12 21:15:48 +00:00
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* gtk_widget_measure:
|
|
|
|
|
* @widget: A #GtkWidget instance
|
|
|
|
|
* @orientation: the orientation to measure
|
|
|
|
|
* @for_size: Size for the opposite of @orientation, i.e.
|
|
|
|
|
* if @orientation is %GTK_ORIENTATION_HORIZONTAL, this is
|
|
|
|
|
* the height the widget should be measured with. The %GTK_ORIENTATION_VERTICAL
|
|
|
|
|
* case is analogous. This way, both height-for-width and width-for-height
|
|
|
|
|
* requests can be implemented. If no size is known, -1 can be passed.
|
|
|
|
|
* @minimum: (out) (optional): location to store the minimum size, or %NULL
|
|
|
|
|
* @natural: (out) (optional): location to store the natural size, or %NULL
|
|
|
|
|
* @minimum_baseline: (out) (optional): location to store the baseline
|
|
|
|
|
* position for the minimum size, or %NULL
|
|
|
|
|
* @natural_baseline: (out) (optional): location to store the baseline
|
|
|
|
|
* position for the natural size, or %NULL
|
|
|
|
|
*
|
|
|
|
|
* Measures @widget in the orientation @orientation and for the given @for_size.
|
|
|
|
|
* As an example, if @orientation is GTK_ORIENTATION_HORIZONTAL and @for_size is 300,
|
|
|
|
|
* this functions will compute the minimum and natural width of @widget if
|
|
|
|
|
* it is allocated at a height of 300 pixels.
|
|
|
|
|
*
|
|
|
|
|
* Since: 3.90
|
2012-11-04 15:10:20 +00:00
|
|
|
|
*/
|
2016-11-12 21:15:48 +00:00
|
|
|
|
void
|
|
|
|
|
gtk_widget_measure (GtkWidget *widget,
|
|
|
|
|
GtkOrientation orientation,
|
|
|
|
|
int for_size,
|
|
|
|
|
int *minimum,
|
|
|
|
|
int *natural,
|
|
|
|
|
int *minimum_baseline,
|
|
|
|
|
int *natural_baseline)
|
2012-11-04 15:10:20 +00:00
|
|
|
|
{
|
|
|
|
|
GHashTable *widgets;
|
|
|
|
|
GHashTableIter iter;
|
|
|
|
|
gpointer key;
|
|
|
|
|
gint min_result = 0, nat_result = 0;
|
|
|
|
|
|
2016-11-12 21:15:48 +00:00
|
|
|
|
g_return_if_fail (GTK_IS_WIDGET (widget));
|
|
|
|
|
g_return_if_fail (for_size >= -1);
|
|
|
|
|
g_return_if_fail (orientation == GTK_ORIENTATION_HORIZONTAL ||
|
|
|
|
|
orientation == GTK_ORIENTATION_VERTICAL);
|
|
|
|
|
|
|
|
|
|
/* This is the main function that checks for a cached size and
|
|
|
|
|
* possibly queries the widget class to compute the size if it's
|
|
|
|
|
* not cached.
|
|
|
|
|
*/
|
2015-09-06 23:58:03 +00:00
|
|
|
|
if (!_gtk_widget_get_visible (widget) && !_gtk_widget_is_toplevel (widget))
|
2013-01-08 11:26:04 +00:00
|
|
|
|
{
|
|
|
|
|
if (minimum)
|
|
|
|
|
*minimum = 0;
|
|
|
|
|
if (natural)
|
|
|
|
|
*natural = 0;
|
2013-03-05 13:54:03 +00:00
|
|
|
|
if (minimum_baseline)
|
|
|
|
|
*minimum_baseline = -1;
|
|
|
|
|
if (natural_baseline)
|
|
|
|
|
*natural_baseline = -1;
|
2013-01-08 11:26:04 +00:00
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
2012-11-04 15:10:20 +00:00
|
|
|
|
if (G_LIKELY (!_gtk_widget_get_sizegroups (widget)))
|
|
|
|
|
{
|
2013-03-05 13:54:03 +00:00
|
|
|
|
gtk_widget_query_size_for_orientation (widget, orientation, for_size, minimum, natural,
|
|
|
|
|
minimum_baseline, natural_baseline);
|
2012-11-04 15:10:20 +00:00
|
|
|
|
return;
|
|
|
|
|
}
|
2010-04-17 05:51:10 +00:00
|
|
|
|
|
2012-11-14 00:25:21 +00:00
|
|
|
|
widgets = _gtk_size_group_get_widget_peers (widget, orientation);
|
2012-11-04 15:10:20 +00:00
|
|
|
|
|
|
|
|
|
g_hash_table_iter_init (&iter, widgets);
|
|
|
|
|
while (g_hash_table_iter_next (&iter, &key, NULL))
|
|
|
|
|
{
|
|
|
|
|
GtkWidget *tmp_widget = key;
|
|
|
|
|
gint min_dimension, nat_dimension;
|
|
|
|
|
|
2013-03-05 13:54:03 +00:00
|
|
|
|
gtk_widget_query_size_for_orientation (tmp_widget, orientation, for_size, &min_dimension, &nat_dimension, NULL, NULL);
|
2012-11-04 15:10:20 +00:00
|
|
|
|
|
|
|
|
|
min_result = MAX (min_result, min_dimension);
|
|
|
|
|
nat_result = MAX (nat_result, nat_dimension);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
g_hash_table_destroy (widgets);
|
|
|
|
|
|
2013-03-05 13:54:03 +00:00
|
|
|
|
/* Baselines make no sense with sizegroups really */
|
|
|
|
|
if (minimum_baseline)
|
|
|
|
|
*minimum_baseline = -1;
|
|
|
|
|
|
|
|
|
|
if (natural_baseline)
|
|
|
|
|
*natural_baseline = -1;
|
|
|
|
|
|
2012-11-04 16:42:55 +00:00
|
|
|
|
if (minimum)
|
|
|
|
|
*minimum = min_result;
|
|
|
|
|
|
|
|
|
|
if (natural)
|
|
|
|
|
*natural = nat_result;
|
2010-04-17 05:51:10 +00:00
|
|
|
|
}
|
|
|
|
|
|
2010-04-11 02:32:55 +00:00
|
|
|
|
/**
|
2010-09-27 06:11:27 +00:00
|
|
|
|
* gtk_widget_get_request_mode:
|
2010-09-21 14:35:17 +00:00
|
|
|
|
* @widget: a #GtkWidget instance
|
2010-04-11 02:32:55 +00:00
|
|
|
|
*
|
|
|
|
|
* Gets whether the widget prefers a height-for-width layout
|
2010-04-24 01:52:55 +00:00
|
|
|
|
* or a width-for-height layout.
|
|
|
|
|
*
|
2014-02-02 06:22:14 +00:00
|
|
|
|
* #GtkBin widgets generally propagate the preference of
|
2010-04-24 01:52:55 +00:00
|
|
|
|
* their child, container widgets need to request something either in
|
|
|
|
|
* context of their children or in context of their allocation
|
2014-02-02 06:22:14 +00:00
|
|
|
|
* capabilities.
|
2010-04-11 02:32:55 +00:00
|
|
|
|
*
|
2010-08-05 16:45:48 +00:00
|
|
|
|
* Returns: The #GtkSizeRequestMode preferred by @widget.
|
2010-04-11 02:32:55 +00:00
|
|
|
|
*
|
|
|
|
|
* Since: 3.0
|
|
|
|
|
*/
|
2010-06-18 04:11:26 +00:00
|
|
|
|
GtkSizeRequestMode
|
2010-09-21 14:35:17 +00:00
|
|
|
|
gtk_widget_get_request_mode (GtkWidget *widget)
|
2010-04-11 02:32:55 +00:00
|
|
|
|
{
|
2012-11-13 21:02:53 +00:00
|
|
|
|
SizeRequestCache *cache;
|
|
|
|
|
|
|
|
|
|
cache = _gtk_widget_peek_request_cache (widget);
|
|
|
|
|
|
2015-09-11 13:08:36 +00:00
|
|
|
|
if (G_UNLIKELY (!cache->request_mode_valid))
|
2012-11-13 21:02:53 +00:00
|
|
|
|
{
|
|
|
|
|
cache->request_mode = GTK_WIDGET_GET_CLASS (widget)->get_request_mode (widget);
|
|
|
|
|
cache->request_mode_valid = TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return cache->request_mode;
|
2010-04-11 02:32:55 +00:00
|
|
|
|
}
|
|
|
|
|
|
2013-05-11 12:29:29 +00:00
|
|
|
|
/*
|
|
|
|
|
* _gtk_widget_get_preferred_size_and_baseline:
|
2010-09-21 14:35:17 +00:00
|
|
|
|
* @widget: a #GtkWidget instance
|
2010-05-12 22:53:43 +00:00
|
|
|
|
* @minimum_size: (out) (allow-none): location for storing the minimum size, or %NULL
|
|
|
|
|
* @natural_size: (out) (allow-none): location for storing the natural size, or %NULL
|
2010-04-13 02:21:46 +00:00
|
|
|
|
*
|
2013-03-05 13:54:03 +00:00
|
|
|
|
* Retrieves the minimum and natural size and the corresponding baselines of a widget, taking
|
2014-02-07 18:01:26 +00:00
|
|
|
|
* into account the widget’s preference for height-for-width management. The baselines may
|
2013-03-05 13:54:03 +00:00
|
|
|
|
* be -1 which means that no baseline is requested for this widget.
|
2010-04-13 02:21:46 +00:00
|
|
|
|
*
|
2010-04-24 01:52:55 +00:00
|
|
|
|
* This is used to retrieve a suitable size by container widgets which do
|
2010-10-08 14:10:42 +00:00
|
|
|
|
* not impose any restrictions on the child placement. It can be used
|
|
|
|
|
* to deduce toplevel window and menu sizes as well as child widgets in
|
2010-11-04 15:30:48 +00:00
|
|
|
|
* free-form containers such as GtkLayout.
|
2010-10-08 14:10:42 +00:00
|
|
|
|
*
|
2014-02-02 06:22:14 +00:00
|
|
|
|
* Handle with care. Note that the natural height of a height-for-width
|
2010-10-08 14:10:42 +00:00
|
|
|
|
* widget will generally be a smaller size than the minimum height, since the required
|
|
|
|
|
* height for the natural width is generally smaller than the required height for
|
2014-02-02 06:22:14 +00:00
|
|
|
|
* the minimum width.
|
2010-04-13 02:21:46 +00:00
|
|
|
|
*/
|
|
|
|
|
void
|
2013-05-11 12:29:29 +00:00
|
|
|
|
_gtk_widget_get_preferred_size_and_baseline (GtkWidget *widget,
|
|
|
|
|
GtkRequisition *minimum_size,
|
|
|
|
|
GtkRequisition *natural_size,
|
|
|
|
|
gint *minimum_baseline,
|
|
|
|
|
gint *natural_baseline)
|
2010-04-13 02:21:46 +00:00
|
|
|
|
{
|
|
|
|
|
gint min_width, nat_width;
|
|
|
|
|
gint min_height, nat_height;
|
|
|
|
|
|
2010-09-21 14:35:17 +00:00
|
|
|
|
g_return_if_fail (GTK_IS_WIDGET (widget));
|
2010-04-13 02:21:46 +00:00
|
|
|
|
|
2010-09-21 14:35:17 +00:00
|
|
|
|
if (gtk_widget_get_request_mode (widget) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
|
2010-04-13 02:21:46 +00:00
|
|
|
|
{
|
2017-05-02 19:50:50 +00:00
|
|
|
|
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
|
|
|
|
|
&min_width, &nat_width, NULL, NULL);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
|
|
|
|
|
if (minimum_size)
|
|
|
|
|
{
|
|
|
|
|
minimum_size->width = min_width;
|
2016-11-23 17:05:09 +00:00
|
|
|
|
gtk_widget_measure (widget,
|
|
|
|
|
GTK_ORIENTATION_VERTICAL, min_width,
|
|
|
|
|
&minimum_size->height, NULL, minimum_baseline, NULL);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (natural_size)
|
|
|
|
|
{
|
|
|
|
|
natural_size->width = nat_width;
|
2016-11-23 17:05:09 +00:00
|
|
|
|
gtk_widget_measure (widget,
|
|
|
|
|
GTK_ORIENTATION_VERTICAL, nat_width,
|
|
|
|
|
NULL, &natural_size->height, NULL, natural_baseline);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
}
|
2010-04-13 02:21:46 +00:00
|
|
|
|
}
|
2011-03-05 08:49:49 +00:00
|
|
|
|
else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT or CONSTANT_SIZE */
|
2010-04-13 02:21:46 +00:00
|
|
|
|
{
|
2016-11-23 17:05:09 +00:00
|
|
|
|
gtk_widget_measure (widget, GTK_ORIENTATION_VERTICAL,
|
|
|
|
|
-1, &min_height, &nat_height, minimum_baseline, natural_baseline);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
|
|
|
|
|
if (minimum_size)
|
|
|
|
|
{
|
|
|
|
|
minimum_size->height = min_height;
|
2017-05-02 19:50:50 +00:00
|
|
|
|
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, min_height,
|
|
|
|
|
&minimum_size->width, NULL, NULL, NULL);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (natural_size)
|
|
|
|
|
{
|
|
|
|
|
natural_size->height = nat_height;
|
2017-05-02 19:50:50 +00:00
|
|
|
|
gtk_widget_measure (widget, GTK_ORIENTATION_HORIZONTAL, nat_height,
|
|
|
|
|
NULL, &natural_size->width, NULL, NULL);
|
2010-06-18 04:11:26 +00:00
|
|
|
|
}
|
2010-04-13 02:21:46 +00:00
|
|
|
|
}
|
|
|
|
|
}
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2010-08-05 16:45:48 +00:00
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2013-03-05 13:54:03 +00:00
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/**
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* gtk_widget_get_preferred_size:
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* @widget: a #GtkWidget instance
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* @minimum_size: (out) (allow-none): location for storing the minimum size, or %NULL
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* @natural_size: (out) (allow-none): location for storing the natural size, or %NULL
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*
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* Retrieves the minimum and natural size of a widget, taking
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2014-02-07 18:01:26 +00:00
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* into account the widget’s preference for height-for-width management.
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2013-03-05 13:54:03 +00:00
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*
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* This is used to retrieve a suitable size by container widgets which do
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* not impose any restrictions on the child placement. It can be used
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* to deduce toplevel window and menu sizes as well as child widgets in
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* free-form containers such as GtkLayout.
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*
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2014-02-02 06:22:14 +00:00
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* Handle with care. Note that the natural height of a height-for-width
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2013-03-05 13:54:03 +00:00
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* widget will generally be a smaller size than the minimum height, since the required
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* height for the natural width is generally smaller than the required height for
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2014-02-02 06:22:14 +00:00
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* the minimum width.
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2013-03-05 13:54:03 +00:00
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*
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2016-11-23 17:05:09 +00:00
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* Use gtk_widget_measure() if you want to support
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2013-03-05 13:54:03 +00:00
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* baseline alignment.
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*
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* Since: 3.0
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*/
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void
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gtk_widget_get_preferred_size (GtkWidget *widget,
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GtkRequisition *minimum_size,
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GtkRequisition *natural_size)
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{
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2013-05-11 12:29:29 +00:00
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_gtk_widget_get_preferred_size_and_baseline (widget, minimum_size, natural_size,
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NULL, NULL);
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2013-03-05 13:54:03 +00:00
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}
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2010-08-05 16:45:48 +00:00
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static gint
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compare_gap (gconstpointer p1,
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gconstpointer p2,
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gpointer data)
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{
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GtkRequestedSize *sizes = data;
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const guint *c1 = p1;
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const guint *c2 = p2;
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const gint d1 = MAX (sizes[*c1].natural_size -
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sizes[*c1].minimum_size,
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0);
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const gint d2 = MAX (sizes[*c2].natural_size -
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sizes[*c2].minimum_size,
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0);
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gint delta = (d2 - d1);
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if (0 == delta)
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delta = (*c2 - *c1);
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return delta;
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}
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/**
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2010-11-04 15:30:48 +00:00
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* gtk_distribute_natural_allocation:
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2010-08-05 16:45:48 +00:00
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* @extra_space: Extra space to redistribute among children after subtracting
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* minimum sizes and any child padding from the overall allocation
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* @n_requested_sizes: Number of requests to fit into the allocation
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* @sizes: An array of structs with a client pointer and a minimum/natural size
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* in the orientation of the allocation.
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*
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2010-11-04 15:30:48 +00:00
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* Distributes @extra_space to child @sizes by bringing smaller
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2010-08-05 16:45:48 +00:00
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* children up to natural size first.
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*
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* The remaining space will be added to the @minimum_size member of the
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* GtkRequestedSize struct. If all sizes reach their natural size then
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* the remaining space is returned.
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*
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* Returns: The remainder of @extra_space after redistributing space
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* to @sizes.
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*/
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2010-11-04 15:30:48 +00:00
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gint
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2010-08-05 16:45:48 +00:00
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gtk_distribute_natural_allocation (gint extra_space,
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guint n_requested_sizes,
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GtkRequestedSize *sizes)
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{
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2010-09-22 04:57:35 +00:00
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guint *spreading;
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2010-08-05 16:45:48 +00:00
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gint i;
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2010-08-18 23:31:53 +00:00
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g_return_val_if_fail (extra_space >= 0, 0);
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2010-09-22 04:57:35 +00:00
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spreading = g_newa (guint, n_requested_sizes);
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2010-08-05 16:45:48 +00:00
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for (i = 0; i < n_requested_sizes; i++)
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spreading[i] = i;
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/* Distribute the container's extra space c_gap. We want to assign
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* this space such that the sum of extra space assigned to children
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* (c^i_gap) is equal to c_cap. The case that there's not enough
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* space for all children to take their natural size needs some
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* attention. The goals we want to achieve are:
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*
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* a) Maximize number of children taking their natural size.
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* b) The allocated size of children should be a continuous
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* function of c_gap. That is, increasing the container size by
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* one pixel should never make drastic changes in the distribution.
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* c) If child i takes its natural size and child j doesn't,
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* child j should have received at least as much gap as child i.
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*
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* The following code distributes the additional space by following
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* these rules.
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*/
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2010-11-04 15:30:48 +00:00
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2010-08-05 16:45:48 +00:00
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/* Sort descending by gap and position. */
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g_qsort_with_data (spreading,
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n_requested_sizes, sizeof (guint),
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compare_gap, sizes);
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2010-11-04 15:30:48 +00:00
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2010-08-05 16:45:48 +00:00
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/* Distribute available space.
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* This master piece of a loop was conceived by Behdad Esfahbod.
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*/
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for (i = n_requested_sizes - 1; extra_space > 0 && i >= 0; --i)
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{
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/* Divide remaining space by number of remaining children.
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* Sort order and reducing remaining space by assigned space
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* ensures that space is distributed equally.
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*/
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gint glue = (extra_space + i) / (i + 1);
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gint gap = sizes[(spreading[i])].natural_size
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- sizes[(spreading[i])].minimum_size;
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2010-11-04 15:30:48 +00:00
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2010-08-05 16:45:48 +00:00
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gint extra = MIN (glue, gap);
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2010-11-04 15:30:48 +00:00
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2010-08-05 16:45:48 +00:00
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sizes[spreading[i]].minimum_size += extra;
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2010-11-04 15:30:48 +00:00
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2010-08-05 16:45:48 +00:00
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extra_space -= extra;
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}
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return extra_space;
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}
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