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149 lines
6.2 KiB
C
149 lines
6.2 KiB
C
/* gbinding.h: Binding for object properties
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*
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* Copyright (C) 2010 Intel Corp.
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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 2.1 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
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* Author: Emmanuele Bassi <ebassi@linux.intel.com>
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*/
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#ifndef __G_BINDING_H__
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#define __G_BINDING_H__
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#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
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#error "Only <glib-object.h> can be included directly."
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#endif
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#include <glib.h>
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#include <gobject/gobject.h>
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G_BEGIN_DECLS
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#define G_TYPE_BINDING_FLAGS (g_binding_flags_get_type ())
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#define G_TYPE_BINDING (g_binding_get_type ())
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#define G_BINDING(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), G_TYPE_BINDING, GBinding))
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#define G_IS_BINDING(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), G_TYPE_BINDING))
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/**
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* GBinding:
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*
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* GBinding is an opaque structure whose members
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* cannot be accessed directly.
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*
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* Since: 2.26
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*/
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typedef struct _GBinding GBinding;
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/**
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* GBindingTransformFunc:
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* @binding: a #GBinding
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* @from_value: the #GValue containing the value to transform
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* @to_value: the #GValue in which to store the transformed value
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* @user_data: data passed to the transform function
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*
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* A function to be called to transform @from_value to @to_value. If
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* this is the @transform_to function of a binding, then @from_value
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* is the @source_property on the @source object, and @to_value is the
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* @target_property on the @target object. If this is the
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* @transform_from function of a %G_BINDING_BIDIRECTIONAL binding,
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* then those roles are reversed.
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*
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* Returns: %TRUE if the transformation was successful, and %FALSE
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* otherwise
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*
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* Since: 2.26
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*/
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typedef gboolean (* GBindingTransformFunc) (GBinding *binding,
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const GValue *from_value,
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GValue *to_value,
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gpointer user_data);
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/**
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* GBindingFlags:
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* @G_BINDING_DEFAULT: The default binding; if the source property
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* changes, the target property is updated with its value.
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* @G_BINDING_BIDIRECTIONAL: Bidirectional binding; if either the
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* property of the source or the property of the target changes,
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* the other is updated.
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* @G_BINDING_SYNC_CREATE: Synchronize the values of the source and
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* target properties when creating the binding; the direction of
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* the synchronization is always from the source to the target.
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* @G_BINDING_INVERT_BOOLEAN: If the two properties being bound are
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* booleans, setting one to %TRUE will result in the other being
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* set to %FALSE and vice versa. This flag will only work for
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* boolean properties, and cannot be used when passing custom
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* transformation functions to g_object_bind_property_full().
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*
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* Flags to be passed to g_object_bind_property() or
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* g_object_bind_property_full().
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*
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* This enumeration can be extended at later date.
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*
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* Since: 2.26
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*/
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typedef enum { /*< prefix=G_BINDING >*/
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G_BINDING_DEFAULT = 0,
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G_BINDING_BIDIRECTIONAL = 1 << 0,
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G_BINDING_SYNC_CREATE = 1 << 1,
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G_BINDING_INVERT_BOOLEAN = 1 << 2
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} GBindingFlags;
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GLIB_AVAILABLE_IN_ALL
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GType g_binding_flags_get_type (void) G_GNUC_CONST;
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GLIB_AVAILABLE_IN_ALL
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GType g_binding_get_type (void) G_GNUC_CONST;
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GLIB_AVAILABLE_IN_ALL
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GBindingFlags g_binding_get_flags (GBinding *binding);
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GLIB_AVAILABLE_IN_ALL
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GObject * g_binding_get_source (GBinding *binding);
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GLIB_AVAILABLE_IN_ALL
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GObject * g_binding_get_target (GBinding *binding);
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GLIB_AVAILABLE_IN_ALL
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const gchar * g_binding_get_source_property (GBinding *binding);
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GLIB_AVAILABLE_IN_ALL
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const gchar * g_binding_get_target_property (GBinding *binding);
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GLIB_AVAILABLE_IN_2_38
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void g_binding_unbind (GBinding *binding);
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GLIB_AVAILABLE_IN_ALL
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GBinding *g_object_bind_property (gpointer source,
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const gchar *source_property,
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gpointer target,
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const gchar *target_property,
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GBindingFlags flags);
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GLIB_AVAILABLE_IN_ALL
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GBinding *g_object_bind_property_full (gpointer source,
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const gchar *source_property,
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gpointer target,
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const gchar *target_property,
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GBindingFlags flags,
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GBindingTransformFunc transform_to,
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GBindingTransformFunc transform_from,
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gpointer user_data,
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GDestroyNotify notify);
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GLIB_AVAILABLE_IN_ALL
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GBinding *g_object_bind_property_with_closures (gpointer source,
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const gchar *source_property,
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gpointer target,
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const gchar *target_property,
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GBindingFlags flags,
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GClosure *transform_to,
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GClosure *transform_from);
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G_END_DECLS
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#endif /* __G_BINDING_H__ */
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