forked from AuroraMiddleware/gtk
a546ae32d7
Those property features don't seem to be in use anywhere. They are redundant since the docs cover the same information and more. They also created unnecessary translation work. Closes #4904
577 lines
18 KiB
C
577 lines
18 KiB
C
/* GTK - The GIMP Toolkit
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* gtksizegroup.c:
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* Copyright (C) 2001 Red Hat Software
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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 Lesser 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include "gtkbuildable.h"
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#include "gtkbuilderprivate.h"
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#include "gtkwidget.h"
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#include "gtkintl.h"
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#include "gtktypebuiltins.h"
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#include "gtkprivate.h"
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#include "gtksizegroup-private.h"
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#include "gtkwidgetprivate.h"
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/**
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* GtkSizeGroup
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*
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* `GtkSizeGroup` groups widgets together so they all request the same size.
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*
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* This is typically useful when you want a column of widgets to have the
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* same size, but you can’t use a `GtkGrid`.
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*
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* In detail, the size requested for each widget in a `GtkSizeGroup` is
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* the maximum of the sizes that would have been requested for each
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* widget in the size group if they were not in the size group. The mode
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* of the size group (see [method@Gtk.SizeGroup.set_mode]) determines whether
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* this applies to the horizontal size, the vertical size, or both sizes.
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*
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* Note that size groups only affect the amount of space requested, not
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* the size that the widgets finally receive. If you want the widgets in
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* a `GtkSizeGroup` to actually be the same size, you need to pack them in
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* such a way that they get the size they request and not more.
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*
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* `GtkSizeGroup` objects are referenced by each widget in the size group,
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* so once you have added all widgets to a `GtkSizeGroup`, you can drop
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* the initial reference to the size group with g_object_unref(). If the
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* widgets in the size group are subsequently destroyed, then they will
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* be removed from the size group and drop their references on the size
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* group; when all widgets have been removed, the size group will be
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* freed.
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*
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* Widgets can be part of multiple size groups; GTK will compute the
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* horizontal size of a widget from the horizontal requisition of all
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* widgets that can be reached from the widget by a chain of size groups
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* of type %GTK_SIZE_GROUP_HORIZONTAL or %GTK_SIZE_GROUP_BOTH, and the
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* vertical size from the vertical requisition of all widgets that can be
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* reached from the widget by a chain of size groups of type
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* %GTK_SIZE_GROUP_VERTICAL or %GTK_SIZE_GROUP_BOTH.
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*
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* Note that only non-contextual sizes of every widget are ever consulted
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* by size groups (since size groups have no knowledge of what size a widget
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* will be allocated in one dimension, it cannot derive how much height
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* a widget will receive for a given width). When grouping widgets that
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* trade height for width in mode %GTK_SIZE_GROUP_VERTICAL or %GTK_SIZE_GROUP_BOTH:
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* the height for the minimum width will be the requested height for all
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* widgets in the group. The same is of course true when horizontally grouping
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* width for height widgets.
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*
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* Widgets that trade height-for-width should set a reasonably large minimum
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* width by way of [property@Gtk.Label:width-chars] for instance. Widgets with
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* static sizes as well as widgets that grow (such as ellipsizing text) need no
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* such considerations.
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*
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* # GtkSizeGroup as GtkBuildable
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*
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* Size groups can be specified in a UI definition by placing an <object>
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* element with `class="GtkSizeGroup"` somewhere in the UI definition. The
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* widgets that belong to the size group are specified by a <widgets> element
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* that may contain multiple <widget> elements, one for each member of the
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* size group. The ”name” attribute gives the id of the widget.
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*
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* An example of a UI definition fragment with `GtkSizeGroup`:
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* ```xml
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* <object class="GtkSizeGroup">
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* <property name="mode">horizontal</property>
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* <widgets>
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* <widget name="radio1"/>
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* <widget name="radio2"/>
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* </widgets>
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* </object>
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* ```
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*/
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typedef struct _GtkSizeGroupClass GtkSizeGroupClass;
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typedef struct _GtkSizeGroupPrivate GtkSizeGroupPrivate;
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struct _GtkSizeGroupClass
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{
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GObjectClass parent_class;
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};
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struct _GtkSizeGroupPrivate
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{
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GSList *widgets;
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guint8 mode;
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};
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enum {
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PROP_0,
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PROP_MODE
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};
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static void gtk_size_group_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gtk_size_group_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec);
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/* GtkBuildable */
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static void gtk_size_group_buildable_init (GtkBuildableIface *iface);
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static gboolean gtk_size_group_buildable_custom_tag_start (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *tagname,
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GtkBuildableParser *parser,
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gpointer *data);
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static void gtk_size_group_buildable_custom_finished (GtkBuildable *buildable,
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GtkBuilder *builder,
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GObject *child,
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const char *tagname,
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gpointer user_data);
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G_STATIC_ASSERT (GTK_SIZE_GROUP_HORIZONTAL == (1 << GTK_ORIENTATION_HORIZONTAL));
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G_STATIC_ASSERT (GTK_SIZE_GROUP_VERTICAL == (1 << GTK_ORIENTATION_VERTICAL));
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G_STATIC_ASSERT (GTK_SIZE_GROUP_BOTH == (GTK_SIZE_GROUP_HORIZONTAL | GTK_SIZE_GROUP_VERTICAL));
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G_DEFINE_TYPE_WITH_CODE (GtkSizeGroup, gtk_size_group, G_TYPE_OBJECT,
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G_ADD_PRIVATE (GtkSizeGroup)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
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gtk_size_group_buildable_init))
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static void
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add_widget_to_closure (GHashTable *widgets,
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GHashTable *groups,
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GtkWidget *widget,
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int orientation)
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{
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GSList *tmp_groups, *tmp_widgets;
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if (g_hash_table_lookup (widgets, widget))
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return;
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g_hash_table_add (widgets, widget);
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for (tmp_groups = _gtk_widget_get_sizegroups (widget); tmp_groups; tmp_groups = tmp_groups->next)
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{
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GtkSizeGroup *tmp_group = tmp_groups->data;
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GtkSizeGroupPrivate *tmp_priv = gtk_size_group_get_instance_private (tmp_group);
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if (g_hash_table_lookup (groups, tmp_group))
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continue;
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if (orientation >= 0 && !(tmp_priv->mode & (1 << orientation)))
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continue;
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g_hash_table_add (groups, tmp_group);
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for (tmp_widgets = tmp_priv->widgets; tmp_widgets; tmp_widgets = tmp_widgets->next)
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add_widget_to_closure (widgets, groups, tmp_widgets->data, orientation);
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}
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}
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GHashTable *
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_gtk_size_group_get_widget_peers (GtkWidget *for_widget,
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GtkOrientation orientation)
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{
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GHashTable *widgets, *groups;
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widgets = g_hash_table_new (NULL, NULL);
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groups = g_hash_table_new (NULL, NULL);
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add_widget_to_closure (widgets, groups, for_widget, orientation);
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g_hash_table_unref (groups);
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return widgets;
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}
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static void
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queue_resize_on_group (GtkSizeGroup *size_group)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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GSList *list;
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for (list = priv->widgets; list; list = list->next)
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{
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gtk_widget_queue_resize (list->data);
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}
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}
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static void
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gtk_size_group_class_init (GtkSizeGroupClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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gobject_class->set_property = gtk_size_group_set_property;
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gobject_class->get_property = gtk_size_group_get_property;
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/**
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* GtkSizeGroup:mode: (attributes org.gtk.Property.get=gtk_size_group_get_mode org.gtk.Property.set=gtk_size_group_set_mode)
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*
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* The direction in which the size group affects requested sizes.
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*/
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g_object_class_install_property (gobject_class,
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PROP_MODE,
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g_param_spec_enum ("mode", NULL, NULL,
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GTK_TYPE_SIZE_GROUP_MODE,
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GTK_SIZE_GROUP_HORIZONTAL,
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GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
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}
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static void
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gtk_size_group_init (GtkSizeGroup *size_group)
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{
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GtkSizeGroupPrivate *priv;
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priv = gtk_size_group_get_instance_private (size_group);
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priv->widgets = NULL;
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priv->mode = GTK_SIZE_GROUP_HORIZONTAL;
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}
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static void
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gtk_size_group_buildable_init (GtkBuildableIface *iface)
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{
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iface->custom_tag_start = gtk_size_group_buildable_custom_tag_start;
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iface->custom_finished = gtk_size_group_buildable_custom_finished;
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}
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static void
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gtk_size_group_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
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switch (prop_id)
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{
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case PROP_MODE:
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gtk_size_group_set_mode (size_group, g_value_get_enum (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gtk_size_group_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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switch (prop_id)
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{
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case PROP_MODE:
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g_value_set_enum (value, priv->mode);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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/**
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* gtk_size_group_new:
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* @mode: the mode for the new size group.
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*
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* Create a new `GtkSizeGroup`.
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*
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* Returns: a newly created `GtkSizeGroup`
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*/
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GtkSizeGroup *
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gtk_size_group_new (GtkSizeGroupMode mode)
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{
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GtkSizeGroup *size_group = g_object_new (GTK_TYPE_SIZE_GROUP, NULL);
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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priv->mode = mode;
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return size_group;
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}
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/**
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* gtk_size_group_set_mode: (attributes org.gtk.Method.set_property=mode)
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* @size_group: a `GtkSizeGroup`
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* @mode: the mode to set for the size group.
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*
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* Sets the `GtkSizeGroupMode` of the size group.
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*
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* The mode of the size group determines whether the widgets in the
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* size group should all have the same horizontal requisition
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* (%GTK_SIZE_GROUP_HORIZONTAL) all have the same vertical requisition
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* (%GTK_SIZE_GROUP_VERTICAL), or should all have the same requisition
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* in both directions (%GTK_SIZE_GROUP_BOTH).
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*/
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void
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gtk_size_group_set_mode (GtkSizeGroup *size_group,
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GtkSizeGroupMode mode)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
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if (priv->mode != mode)
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{
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if (priv->mode != GTK_SIZE_GROUP_NONE)
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queue_resize_on_group (size_group);
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priv->mode = mode;
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if (priv->mode != GTK_SIZE_GROUP_NONE)
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queue_resize_on_group (size_group);
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g_object_notify (G_OBJECT (size_group), "mode");
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}
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}
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/**
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* gtk_size_group_get_mode: (attributes org.gtk.Method.get_property=mode)
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* @size_group: a `GtkSizeGroup`
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*
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* Gets the current mode of the size group.
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*
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* Returns: the current mode of the size group.
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*/
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GtkSizeGroupMode
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gtk_size_group_get_mode (GtkSizeGroup *size_group)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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g_return_val_if_fail (GTK_IS_SIZE_GROUP (size_group), GTK_SIZE_GROUP_BOTH);
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return priv->mode;
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}
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/**
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* gtk_size_group_add_widget:
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* @size_group: a `GtkSizeGroup`
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* @widget: the `GtkWidget` to add
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*
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* Adds a widget to a `GtkSizeGroup`.
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*
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* In the future, the requisition
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* of the widget will be determined as the maximum of its requisition
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* and the requisition of the other widgets in the size group.
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* Whether this applies horizontally, vertically, or in both directions
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* depends on the mode of the size group.
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* See [method@Gtk.SizeGroup.set_mode].
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*
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* When the widget is destroyed or no longer referenced elsewhere, it
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* will be removed from the size group.
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*/
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void
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gtk_size_group_add_widget (GtkSizeGroup *size_group,
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GtkWidget *widget)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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GSList *groups;
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g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
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g_return_if_fail (GTK_IS_WIDGET (widget));
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groups = _gtk_widget_get_sizegroups (widget);
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if (!g_slist_find (groups, size_group))
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{
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_gtk_widget_add_sizegroup (widget, size_group);
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priv->widgets = g_slist_prepend (priv->widgets, widget);
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g_object_ref (size_group);
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}
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queue_resize_on_group (size_group);
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}
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/**
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* gtk_size_group_remove_widget:
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* @size_group: a `GtkSizeGroup`
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* @widget: the `GtkWidget` to remove
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*
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* Removes a widget from a `GtkSizeGroup`.
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*/
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void
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gtk_size_group_remove_widget (GtkSizeGroup *size_group,
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GtkWidget *widget)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
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g_return_if_fail (GTK_IS_WIDGET (widget));
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g_return_if_fail (g_slist_find (priv->widgets, widget));
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_gtk_widget_remove_sizegroup (widget, size_group);
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priv->widgets = g_slist_remove (priv->widgets, widget);
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queue_resize_on_group (size_group);
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gtk_widget_queue_resize (widget);
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g_object_unref (size_group);
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}
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/**
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* gtk_size_group_get_widgets:
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* @size_group: a `GtkSizeGroup`
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*
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* Returns the list of widgets associated with @size_group.
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*
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* Returns: (element-type GtkWidget) (transfer none): a `GSList` of
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* widgets. The list is owned by GTK and should not be modified.
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*/
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GSList *
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gtk_size_group_get_widgets (GtkSizeGroup *size_group)
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{
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GtkSizeGroupPrivate *priv = gtk_size_group_get_instance_private (size_group);
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return priv->widgets;
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}
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typedef struct {
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char *name;
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int line;
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int col;
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} ItemData;
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static void
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item_data_free (gpointer data)
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{
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ItemData *item_data = data;
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g_free (item_data->name);
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g_free (item_data);
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}
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typedef struct {
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GObject *object;
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GtkBuilder *builder;
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GSList *items;
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} GSListSubParserData;
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static void
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size_group_start_element (GtkBuildableParseContext *context,
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const char *element_name,
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const char **names,
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const char **values,
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gpointer user_data,
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GError **error)
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{
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GSListSubParserData *data = (GSListSubParserData*)user_data;
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if (strcmp (element_name, "widget") == 0)
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{
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const char *name;
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ItemData *item_data;
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if (!_gtk_builder_check_parent (data->builder, context, "widgets", error))
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return;
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if (!g_markup_collect_attributes (element_name, names, values, error,
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G_MARKUP_COLLECT_STRING, "name", &name,
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G_MARKUP_COLLECT_INVALID))
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{
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_gtk_builder_prefix_error (data->builder, context, error);
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return;
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}
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item_data = g_new (ItemData, 1);
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item_data->name = g_strdup (name);
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gtk_buildable_parse_context_get_position (context, &item_data->line, &item_data->col);
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data->items = g_slist_prepend (data->items, item_data);
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}
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else if (strcmp (element_name, "widgets") == 0)
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{
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if (!_gtk_builder_check_parent (data->builder, context, "object", error))
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return;
|
||
|
||
if (!g_markup_collect_attributes (element_name, names, values, error,
|
||
G_MARKUP_COLLECT_INVALID, NULL, NULL,
|
||
G_MARKUP_COLLECT_INVALID))
|
||
_gtk_builder_prefix_error (data->builder, context, error);
|
||
}
|
||
else
|
||
{
|
||
_gtk_builder_error_unhandled_tag (data->builder, context,
|
||
"GtkSizeGroup", element_name,
|
||
error);
|
||
}
|
||
}
|
||
|
||
static const GtkBuildableParser size_group_parser =
|
||
{
|
||
size_group_start_element
|
||
};
|
||
|
||
static gboolean
|
||
gtk_size_group_buildable_custom_tag_start (GtkBuildable *buildable,
|
||
GtkBuilder *builder,
|
||
GObject *child,
|
||
const char *tagname,
|
||
GtkBuildableParser *parser,
|
||
gpointer *parser_data)
|
||
{
|
||
GSListSubParserData *data;
|
||
|
||
if (child)
|
||
return FALSE;
|
||
|
||
if (strcmp (tagname, "widgets") == 0)
|
||
{
|
||
data = g_slice_new0 (GSListSubParserData);
|
||
data->items = NULL;
|
||
data->object = G_OBJECT (buildable);
|
||
data->builder = builder;
|
||
|
||
*parser = size_group_parser;
|
||
*parser_data = data;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static void
|
||
gtk_size_group_buildable_custom_finished (GtkBuildable *buildable,
|
||
GtkBuilder *builder,
|
||
GObject *child,
|
||
const char *tagname,
|
||
gpointer user_data)
|
||
{
|
||
GSList *l;
|
||
GSListSubParserData *data;
|
||
GObject *object;
|
||
|
||
if (strcmp (tagname, "widgets") != 0)
|
||
return;
|
||
|
||
data = (GSListSubParserData*)user_data;
|
||
data->items = g_slist_reverse (data->items);
|
||
|
||
for (l = data->items; l; l = l->next)
|
||
{
|
||
ItemData *item_data = l->data;
|
||
object = _gtk_builder_lookup_object (builder, item_data->name, item_data->line, item_data->col);
|
||
if (!object)
|
||
continue;
|
||
gtk_size_group_add_widget (GTK_SIZE_GROUP (data->object), GTK_WIDGET (object));
|
||
}
|
||
g_slist_free_full (data->items, item_data_free);
|
||
g_slice_free (GSListSubParserData, data);
|
||
}
|