mirror of
https://github.com/varun-r-mallya/sysprof.git
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sysprof: add EggBindingGroup
Until we have this in GLib, just embed it.
This commit is contained in:
Christian Hergert
639
src/sysprof/egg-binding-group.c
Normal file
639
src/sysprof/egg-binding-group.c
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@ -0,0 +1,639 @@
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/* egg-binding-group.c
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*
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* Copyright (C) 2015 Christian Hergert <christian@hergert.me>
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* Copyright (C) 2015 Garrett Regier <garrettregier@gmail.com>
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*
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* This file is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of the
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* License, or (at your option) any later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* 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 General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <glib/gi18n.h>
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#include "egg-binding-group.h"
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/**
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* SECTION:eggbindinggroup
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* @title: EggBindingGroup
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* @short_description: Manage a collection of #GBindings on
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* a #GObject as a group.
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*
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* #EggBindingGroup manages to simplify the process of binding
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* many properties from a #GObject as a group. As such there is no API
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* to unbind a property from the group.
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*
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* In particular, this allows you to change the source instance for the
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* bindings. This automatically causes the unbinding of the properties
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* from the old instance and binding to the new instance.
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*
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* This should not be confused with #GtkBindingGroup.
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*/
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struct _EggBindingGroup
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{
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GObject parent_instance;
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GObject *source;
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GPtrArray *lazy_bindings;
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};
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typedef struct
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{
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EggBindingGroup *group;
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const gchar *source_property;
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const gchar *target_property;
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GObject *target;
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GBinding *binding;
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gpointer user_data;
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GDestroyNotify user_data_destroy;
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gpointer transform_to;
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gpointer transform_from;
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GBindingFlags binding_flags;
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guint using_closures : 1;
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} LazyBinding;
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G_DEFINE_TYPE (EggBindingGroup, egg_binding_group, G_TYPE_OBJECT)
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enum {
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PROP_0,
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PROP_SOURCE,
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LAST_PROP
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};
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static GParamSpec *properties [LAST_PROP];
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/*#define DEBUG_BINDINGS 1*/
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#ifdef DEBUG_BINDINGS
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static gchar *
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_g_flags_to_string (GFlagsClass *flags_class,
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guint value)
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{
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GString *str;
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GFlagsValue *flags_value;
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gboolean first = TRUE;
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str = g_string_new (NULL);
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while ((first || value != 0) &&
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(flags_value = g_flags_get_first_value (flags_class, value)) != NULL)
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{
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if (!first)
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g_string_append (str, " | ");
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g_string_append (str, flags_value->value_name);
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first = FALSE;
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value &= ~(flags_value->value);
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}
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return g_string_free (str, FALSE);
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}
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#endif
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static void
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egg_binding_group_connect (EggBindingGroup *self,
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LazyBinding *lazy_binding)
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{
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GBinding *binding;
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g_assert (EGG_IS_BINDING_GROUP (self));
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g_assert (self->source != NULL);
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g_assert (lazy_binding != NULL);
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g_assert (lazy_binding->binding == NULL);
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g_assert (lazy_binding->target != NULL);
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g_assert (lazy_binding->target_property != NULL);
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g_assert (lazy_binding->source_property != NULL);
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#ifdef DEBUG_BINDINGS
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{
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GFlagsClass *flags_class;
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g_autofree gchar *flags_str = NULL;
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flags_class = g_type_class_ref (G_TYPE_BINDING_FLAGS);
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flags_str = _g_flags_to_string (flags_class,
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lazy_binding->binding_flags);
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g_print ("Binding %s(%p):%s to %s(%p):%s (flags=%s)\n",
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G_OBJECT_TYPE_NAME (self->source),
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self->source,
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lazy_binding->source_property,
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G_OBJECT_TYPE_NAME (lazy_binding->target),
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lazy_binding->target,
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lazy_binding->target_property,
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flags_str);
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g_type_class_unref (flags_class);
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}
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#endif
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if (!lazy_binding->using_closures)
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{
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binding = g_object_bind_property_full (self->source,
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lazy_binding->source_property,
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lazy_binding->target,
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lazy_binding->target_property,
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lazy_binding->binding_flags,
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lazy_binding->transform_to,
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lazy_binding->transform_from,
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lazy_binding->user_data,
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NULL);
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}
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else
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{
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binding = g_object_bind_property_with_closures (self->source,
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lazy_binding->source_property,
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lazy_binding->target,
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lazy_binding->target_property,
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lazy_binding->binding_flags,
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lazy_binding->transform_to,
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lazy_binding->transform_from);
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}
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lazy_binding->binding = binding;
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}
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static void
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egg_binding_group_disconnect (LazyBinding *lazy_binding)
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{
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g_assert (lazy_binding != NULL);
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if (lazy_binding->binding != NULL)
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{
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g_binding_unbind (lazy_binding->binding);
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lazy_binding->binding = NULL;
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}
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}
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static void
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egg_binding_group__source_weak_notify (gpointer data,
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GObject *where_object_was)
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{
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EggBindingGroup *self = data;
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gsize i;
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g_assert (EGG_IS_BINDING_GROUP (self));
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self->source = NULL;
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for (i = 0; i < self->lazy_bindings->len; i++)
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{
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LazyBinding *lazy_binding;
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lazy_binding = g_ptr_array_index (self->lazy_bindings, i);
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lazy_binding->binding = NULL;
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}
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}
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static void
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egg_binding_group__target_weak_notify (gpointer data,
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GObject *where_object_was)
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{
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EggBindingGroup *self = data;
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gsize i;
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g_assert (EGG_IS_BINDING_GROUP (self));
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for (i = 0; i < self->lazy_bindings->len; i++)
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{
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LazyBinding *lazy_binding;
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lazy_binding = g_ptr_array_index (self->lazy_bindings, i);
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if (lazy_binding->target == where_object_was)
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{
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lazy_binding->target = NULL;
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lazy_binding->binding = NULL;
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g_ptr_array_remove_index_fast (self->lazy_bindings, i);
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break;
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}
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}
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}
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static void
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lazy_binding_free (gpointer data)
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{
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LazyBinding *lazy_binding = data;
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if (lazy_binding->target != NULL)
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{
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g_object_weak_unref (lazy_binding->target,
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egg_binding_group__target_weak_notify,
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lazy_binding->group);
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lazy_binding->target = NULL;
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}
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egg_binding_group_disconnect (lazy_binding);
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lazy_binding->group = NULL;
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lazy_binding->source_property = NULL;
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lazy_binding->target_property = NULL;
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if (lazy_binding->user_data_destroy)
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lazy_binding->user_data_destroy (lazy_binding->user_data);
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if (lazy_binding->using_closures)
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{
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g_clear_pointer (&lazy_binding->transform_to, g_closure_unref);
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g_clear_pointer (&lazy_binding->transform_from, g_closure_unref);
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}
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g_slice_free (LazyBinding, lazy_binding);
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}
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static void
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egg_binding_group_dispose (GObject *object)
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{
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EggBindingGroup *self = (EggBindingGroup *)object;
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g_assert (EGG_IS_BINDING_GROUP (self));
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if (self->source != NULL)
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{
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g_object_weak_unref (self->source,
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egg_binding_group__source_weak_notify,
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self);
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self->source = NULL;
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}
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if (self->lazy_bindings->len != 0)
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g_ptr_array_remove_range (self->lazy_bindings, 0, self->lazy_bindings->len);
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G_OBJECT_CLASS (egg_binding_group_parent_class)->dispose (object);
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}
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static void
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egg_binding_group_finalize (GObject *object)
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{
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EggBindingGroup *self = (EggBindingGroup *)object;
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g_assert (self->lazy_bindings != NULL);
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g_assert (self->lazy_bindings->len == 0);
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g_clear_pointer (&self->lazy_bindings, g_ptr_array_unref);
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G_OBJECT_CLASS (egg_binding_group_parent_class)->finalize (object);
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}
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static void
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egg_binding_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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EggBindingGroup *self = EGG_BINDING_GROUP (object);
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switch (prop_id)
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{
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case PROP_SOURCE:
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g_value_set_object (value, egg_binding_group_get_source (self));
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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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}
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}
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static void
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egg_binding_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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EggBindingGroup *self = EGG_BINDING_GROUP (object);
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switch (prop_id)
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{
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case PROP_SOURCE:
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egg_binding_group_set_source (self, g_value_get_object (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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}
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}
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static void
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egg_binding_group_class_init (EggBindingGroupClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->dispose = egg_binding_group_dispose;
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object_class->finalize = egg_binding_group_finalize;
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object_class->get_property = egg_binding_group_get_property;
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object_class->set_property = egg_binding_group_set_property;
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/**
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* EggBindingGroup:source
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*
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* The source object used for binding properties.
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*/
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properties [PROP_SOURCE] =
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g_param_spec_object ("source",
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"Source",
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"The source GObject used for binding properties.",
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G_TYPE_OBJECT,
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(G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_properties (object_class, LAST_PROP, properties);
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}
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static void
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egg_binding_group_init (EggBindingGroup *self)
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{
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self->lazy_bindings = g_ptr_array_new_with_free_func (lazy_binding_free);
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}
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/**
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* egg_binding_group_new:
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*
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* Creates a new #EggBindingGroup.
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*
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* Returns: a new #EggBindingGroup
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*/
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EggBindingGroup *
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egg_binding_group_new (void)
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{
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return g_object_new (EGG_TYPE_BINDING_GROUP, NULL);
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}
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/**
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* egg_binding_group_get_source:
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* @self: the #EggBindingGroup
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*
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* Gets the source object used for binding properties.
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*
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* Returns: (transfer none) (nullable): the source object.
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*/
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GObject *
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egg_binding_group_get_source (EggBindingGroup *self)
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{
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g_return_val_if_fail (EGG_IS_BINDING_GROUP (self), NULL);
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return self->source;
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}
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static gboolean
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egg_binding_group_check_source (EggBindingGroup *self,
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gpointer source)
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{
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gsize i;
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for (i = 0; i < self->lazy_bindings->len; i++)
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{
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LazyBinding *lazy_binding;
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lazy_binding = g_ptr_array_index (self->lazy_bindings, i);
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g_return_val_if_fail (g_object_class_find_property (G_OBJECT_GET_CLASS (source),
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lazy_binding->source_property) != NULL,
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FALSE);
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}
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return TRUE;
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}
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/**
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* egg_binding_group_set_source:
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* @self: the #EggBindingGroup
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* @source: (type GObject) (nullable): the source #GObject
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*
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* Sets @source as the source object used for creating property
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* bindings. If there is already a source object all bindings from it
|
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* will be removed.
|
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*
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* Note: All properties that have been bound must exist on @source.
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*/
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void
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egg_binding_group_set_source (EggBindingGroup *self,
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gpointer source)
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{
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g_return_if_fail (EGG_IS_BINDING_GROUP (self));
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g_return_if_fail (!source || G_IS_OBJECT (source));
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g_return_if_fail (source != (gpointer)self);
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||||
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if (source == (gpointer)self->source)
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return;
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||||
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||||
if (self->source != NULL)
|
||||
{
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||||
gsize i;
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||||
|
||||
g_object_weak_unref (self->source,
|
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egg_binding_group__source_weak_notify,
|
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self);
|
||||
self->source = NULL;
|
||||
|
||||
for (i = 0; i < self->lazy_bindings->len; i++)
|
||||
{
|
||||
LazyBinding *lazy_binding;
|
||||
|
||||
lazy_binding = g_ptr_array_index (self->lazy_bindings, i);
|
||||
egg_binding_group_disconnect (lazy_binding);
|
||||
}
|
||||
}
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||||
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||||
if (source != NULL && egg_binding_group_check_source (self, source))
|
||||
{
|
||||
gsize i;
|
||||
|
||||
self->source = source;
|
||||
g_object_weak_ref (self->source,
|
||||
egg_binding_group__source_weak_notify,
|
||||
self);
|
||||
|
||||
for (i = 0; i < self->lazy_bindings->len; i++)
|
||||
{
|
||||
LazyBinding *lazy_binding;
|
||||
|
||||
lazy_binding = g_ptr_array_index (self->lazy_bindings, i);
|
||||
egg_binding_group_connect (self, lazy_binding);
|
||||
}
|
||||
}
|
||||
|
||||
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_SOURCE]);
|
||||
}
|
||||
|
||||
static void
|
||||
egg_binding_group_bind_helper (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags,
|
||||
gpointer transform_to,
|
||||
gpointer transform_from,
|
||||
gpointer user_data,
|
||||
GDestroyNotify user_data_destroy,
|
||||
gboolean using_closures)
|
||||
{
|
||||
LazyBinding *lazy_binding;
|
||||
|
||||
g_return_if_fail (EGG_IS_BINDING_GROUP (self));
|
||||
g_return_if_fail (source_property != NULL);
|
||||
g_return_if_fail (self->source == NULL ||
|
||||
g_object_class_find_property (G_OBJECT_GET_CLASS (self->source),
|
||||
source_property) != NULL);
|
||||
g_return_if_fail (G_IS_OBJECT (target));
|
||||
g_return_if_fail (target_property != NULL);
|
||||
g_return_if_fail (g_object_class_find_property (G_OBJECT_GET_CLASS (target),
|
||||
target_property) != NULL);
|
||||
g_return_if_fail (target != (gpointer)self ||
|
||||
strcmp (source_property, target_property) != 0);
|
||||
|
||||
lazy_binding = g_slice_new0 (LazyBinding);
|
||||
lazy_binding->group = self;
|
||||
lazy_binding->source_property = g_intern_string (source_property);
|
||||
lazy_binding->target_property = g_intern_string (target_property);
|
||||
lazy_binding->target = target;
|
||||
lazy_binding->binding_flags = flags | G_BINDING_SYNC_CREATE;
|
||||
lazy_binding->user_data = user_data;
|
||||
lazy_binding->user_data_destroy = user_data_destroy;
|
||||
lazy_binding->transform_to = transform_to;
|
||||
lazy_binding->transform_from = transform_from;
|
||||
|
||||
if (using_closures)
|
||||
{
|
||||
lazy_binding->using_closures = TRUE;
|
||||
|
||||
if (transform_to != NULL)
|
||||
g_closure_sink (g_closure_ref (transform_to));
|
||||
|
||||
if (transform_from != NULL)
|
||||
g_closure_sink (g_closure_ref (transform_from));
|
||||
}
|
||||
|
||||
g_object_weak_ref (target,
|
||||
egg_binding_group__target_weak_notify,
|
||||
self);
|
||||
|
||||
g_ptr_array_add (self->lazy_bindings, lazy_binding);
|
||||
|
||||
if (self->source != NULL)
|
||||
egg_binding_group_connect (self, lazy_binding);
|
||||
}
|
||||
|
||||
/**
|
||||
* egg_binding_group_bind:
|
||||
* @self: the #EggBindingGroup
|
||||
* @source_property: the property on the source to bind
|
||||
* @target: (type GObject): the target #GObject
|
||||
* @target_property: the property on @target to bind
|
||||
* @flags: the flags used to create the #GBinding
|
||||
*
|
||||
* Creates a binding between @source_property on the source object
|
||||
* and @target_property on @target. Whenever the @source_property
|
||||
* is changed the @target_property is updated using the same value.
|
||||
* The binding flags #G_BINDING_SYNC_CREATE is automatically specified.
|
||||
*
|
||||
* See: g_object_bind_property().
|
||||
*/
|
||||
void
|
||||
egg_binding_group_bind (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags)
|
||||
{
|
||||
egg_binding_group_bind_full (self, source_property,
|
||||
target, target_property,
|
||||
flags,
|
||||
NULL, NULL,
|
||||
NULL, NULL);
|
||||
}
|
||||
|
||||
/**
|
||||
* egg_binding_group_bind_full:
|
||||
* @self: the #EggBindingGroup
|
||||
* @source_property: the property on the source to bind
|
||||
* @target: (type GObject): the target #GObject
|
||||
* @target_property: the property on @target to bind
|
||||
* @flags: the flags used to create the #GBinding
|
||||
* @transform_to: (scope notified) (nullable): the transformation function
|
||||
* from the source object to the @target, or %NULL to use the default
|
||||
* @transform_from: (scope notified) (nullable): the transformation function
|
||||
* from the @target to the source object, or %NULL to use the default
|
||||
* @user_data: custom data to be passed to the transformation
|
||||
* functions, or %NULL
|
||||
* @user_data_destroy: function to be called when disposing the binding,
|
||||
* to free the resources used by the transformation functions
|
||||
*
|
||||
* Creates a binding between @source_property on the source object and
|
||||
* @target_property on @target, allowing you to set the transformation
|
||||
* functions to be used by the binding. The binding flags
|
||||
* #G_BINDING_SYNC_CREATE is automatically specified.
|
||||
*
|
||||
* See: g_object_bind_property_full().
|
||||
*/
|
||||
void
|
||||
egg_binding_group_bind_full (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags,
|
||||
GBindingTransformFunc transform_to,
|
||||
GBindingTransformFunc transform_from,
|
||||
gpointer user_data,
|
||||
GDestroyNotify user_data_destroy)
|
||||
{
|
||||
egg_binding_group_bind_helper (self, source_property,
|
||||
target, target_property,
|
||||
flags,
|
||||
transform_to, transform_from,
|
||||
user_data, user_data_destroy,
|
||||
FALSE);
|
||||
}
|
||||
|
||||
/**
|
||||
* egg_binding_group_bind_with_closures: (rename-to egg_binding_group_bind_full)
|
||||
* @self: the #EggBindingGroup
|
||||
* @source_property: the property on the source to bind
|
||||
* @target: (type GObject): the target #GObject
|
||||
* @target_property: the property on @target to bind
|
||||
* @flags: the flags used to create the #GBinding
|
||||
* @transform_to: (nullable): a #GClosure wrapping the
|
||||
* transformation function from the source object to the @target,
|
||||
* or %NULL to use the default
|
||||
* @transform_from: (nullable): a #GClosure wrapping the
|
||||
* transformation function from the @target to the source object,
|
||||
* or %NULL to use the default
|
||||
*
|
||||
* Creates a binding between @source_property on the source object and
|
||||
* @target_property on @target, allowing you to set the transformation
|
||||
* functions to be used by the binding. The binding flags
|
||||
* #G_BINDING_SYNC_CREATE is automatically specified.
|
||||
*
|
||||
* This function is the language bindings friendly version of
|
||||
* egg_binding_group_bind_property_full(), using #GClosures
|
||||
* instead of function pointers.
|
||||
*
|
||||
* See: g_object_bind_property_with_closures().
|
||||
*/
|
||||
void
|
||||
egg_binding_group_bind_with_closures (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags,
|
||||
GClosure *transform_to,
|
||||
GClosure *transform_from)
|
||||
{
|
||||
egg_binding_group_bind_helper (self, source_property,
|
||||
target, target_property,
|
||||
flags,
|
||||
transform_to, transform_from,
|
||||
NULL, NULL,
|
||||
TRUE);
|
||||
}
|
||||
|
||||
57
src/sysprof/egg-binding-group.h
Normal file
57
src/sysprof/egg-binding-group.h
Normal file
@ -0,0 +1,57 @@
|
||||
/* egg-binding-group.h
|
||||
*
|
||||
* Copyright (C) 2015 Christian Hergert <christian@hergert.me>
|
||||
* Copyright (C) 2015 Garrett Regier <garrettregier@gmail.com>
|
||||
*
|
||||
* This file is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU Lesser General Public License as
|
||||
* published by the Free Software Foundation; either version 2.1 of the
|
||||
* License, or (at your option) any later version.
|
||||
*
|
||||
* This file is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <gio/gio.h>
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define EGG_TYPE_BINDING_GROUP (egg_binding_group_get_type())
|
||||
|
||||
G_DECLARE_FINAL_TYPE (EggBindingGroup, egg_binding_group, EGG, BINDING_GROUP, GObject)
|
||||
|
||||
EggBindingGroup *egg_binding_group_new (void);
|
||||
GObject *egg_binding_group_get_source (EggBindingGroup *self);
|
||||
void egg_binding_group_set_source (EggBindingGroup *self,
|
||||
gpointer source);
|
||||
void egg_binding_group_bind (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags);
|
||||
void egg_binding_group_bind_full (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags,
|
||||
GBindingTransformFunc transform_to,
|
||||
GBindingTransformFunc transform_from,
|
||||
gpointer user_data,
|
||||
GDestroyNotify user_data_destroy);
|
||||
void egg_binding_group_bind_with_closures (EggBindingGroup *self,
|
||||
const gchar *source_property,
|
||||
gpointer target,
|
||||
const gchar *target_property,
|
||||
GBindingFlags flags,
|
||||
GClosure *transform_to,
|
||||
GClosure *transform_from);
|
||||
|
||||
G_END_DECLS
|
||||
|
||||
@ -1,6 +1,7 @@
|
||||
if get_option('enable_gtk') and get_option('libsysprof')
|
||||
|
||||
sysprof_sources = [
|
||||
'egg-binding-group.c',
|
||||
'sysprof.c',
|
||||
'sysprof-application.c',
|
||||
'sysprof-window.c',
|
||||
|
||||
Reference in New Issue
Block a user