1 /* GObject - GLib Type, Object, Parameter and Signal Library
2 * Copyright (C) 1997-1999, 2000-2001 Tim Janik and Red Hat, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General
15 * Public License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
17 * Boston, MA 02111-1307, USA.
19 * gparam.h: GParamSpec base class implementation
25 #include <gobject/gvalue.h>
29 /* --- standard type macros --- */
30 #define G_TYPE_IS_PARAM(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_PARAM)
31 #define G_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_CAST ((pspec), G_TYPE_PARAM, GParamSpec))
32 #define G_IS_PARAM_SPEC(pspec) (G_TYPE_CHECK_INSTANCE_TYPE ((pspec), G_TYPE_PARAM))
33 #define G_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_CAST ((pclass), G_TYPE_PARAM, GParamSpecClass))
34 #define G_IS_PARAM_SPEC_CLASS(pclass) (G_TYPE_CHECK_CLASS_TYPE ((pclass), G_TYPE_PARAM))
35 #define G_PARAM_SPEC_GET_CLASS(pspec) (G_TYPE_INSTANCE_GET_CLASS ((pspec), G_TYPE_PARAM, GParamSpecClass))
38 /* --- convenience macros --- */
39 #define G_PARAM_SPEC_TYPE(pspec) (G_TYPE_FROM_INSTANCE (pspec))
40 #define G_PARAM_SPEC_TYPE_NAME(pspec) (g_type_name (G_PARAM_SPEC_TYPE (pspec)))
41 #define G_PARAM_SPEC_VALUE_TYPE(pspec) (G_PARAM_SPEC (pspec)->value_type)
42 #define G_VALUE_HOLDS_PARAM(value) (G_TYPE_CHECK_VALUE_TYPE ((value), G_TYPE_PARAM))
48 G_PARAM_READABLE = 1 << 0,
49 G_PARAM_WRITABLE = 1 << 1,
50 G_PARAM_CONSTRUCT = 1 << 2,
51 G_PARAM_CONSTRUCT_ONLY = 1 << 3,
52 G_PARAM_LAX_VALIDATION = 1 << 4,
53 G_PARAM_PRIVATE = 1 << 5
55 #define G_PARAM_READWRITE (G_PARAM_READABLE | G_PARAM_WRITABLE)
56 #define G_PARAM_MASK (0x000000ff)
57 /* bits in the range 0xffffff00 are reserved for 3rd party usage */
58 #define G_PARAM_USER_SHIFT (8)
61 /* --- typedefs & structures --- */
62 typedef struct _GParamSpec GParamSpec;
63 typedef struct _GParamSpecClass GParamSpecClass;
64 typedef struct _GParameter GParameter;
65 typedef struct _GParamSpecPool GParamSpecPool;
68 GTypeInstance g_type_instance;
73 GType owner_type; /* class using this property */
80 guint param_id; /* sort-criteria */
82 struct _GParamSpecClass
84 GTypeClass g_type_class;
88 void (*finalize) (GParamSpec *pspec);
91 void (*value_set_default) (GParamSpec *pspec,
93 gboolean (*value_validate) (GParamSpec *pspec,
95 gint (*values_cmp) (GParamSpec *pspec,
97 const GValue *value2);
99 struct _GParameter /* auxillary structure for _setv() variants */
106 /* --- prototypes --- */
107 GParamSpec* g_param_spec_ref (GParamSpec *pspec);
108 void g_param_spec_unref (GParamSpec *pspec);
109 void g_param_spec_sink (GParamSpec *pspec);
110 gpointer g_param_spec_get_qdata (GParamSpec *pspec,
112 void g_param_spec_set_qdata (GParamSpec *pspec,
115 void g_param_spec_set_qdata_full (GParamSpec *pspec,
118 GDestroyNotify destroy);
119 gpointer g_param_spec_steal_qdata (GParamSpec *pspec,
121 void g_param_value_set_default (GParamSpec *pspec,
123 gboolean g_param_value_defaults (GParamSpec *pspec,
125 gboolean g_param_value_validate (GParamSpec *pspec,
127 gboolean g_param_value_convert (GParamSpec *dest_value_spec,
128 const GValue *src_value,
130 gboolean strict_validation);
131 gint g_param_values_cmp (GParamSpec *pspec,
132 const GValue *value1,
133 const GValue *value2);
134 G_CONST_RETURN gchar* g_param_get_name (GParamSpec *pspec);
135 G_CONST_RETURN gchar* g_param_get_nick (GParamSpec *pspec);
136 G_CONST_RETURN gchar* g_param_get_blurb (GParamSpec *pspec);
137 void g_value_set_param (GValue *value,
139 GParamSpec* g_value_get_param (const GValue *value);
140 GParamSpec* g_value_dup_param (const GValue *value);
143 /* --- convenience functions --- */
144 typedef struct _GParamSpecTypeInfo GParamSpecTypeInfo;
145 struct _GParamSpecTypeInfo
147 /* type system portion */
148 guint16 instance_size; /* obligatory */
149 guint16 n_preallocs; /* optional */
150 void (*instance_init) (GParamSpec *pspec); /* optional */
153 GType value_type; /* obligatory */
154 void (*finalize) (GParamSpec *pspec); /* optional */
155 void (*value_set_default) (GParamSpec *pspec, /* recommended */
157 gboolean (*value_validate) (GParamSpec *pspec, /* optional */
159 gint (*values_cmp) (GParamSpec *pspec, /* recommended */
160 const GValue *value1,
161 const GValue *value2);
163 GType g_param_type_register_static (const gchar *name,
164 const GParamSpecTypeInfo *pspec_info);
167 /* --- protected --- */
168 gpointer g_param_spec_internal (GType param_type,
173 GParamSpecPool* g_param_spec_pool_new (gboolean type_prefixing);
174 void g_param_spec_pool_insert (GParamSpecPool *pool,
177 void g_param_spec_pool_remove (GParamSpecPool *pool,
179 GParamSpec* g_param_spec_pool_lookup (GParamSpecPool *pool,
180 const gchar *param_name,
182 gboolean walk_ancestors);
183 GList* g_param_spec_pool_list_owned (GParamSpecPool *pool,
185 GParamSpec** g_param_spec_pool_list (GParamSpecPool *pool,
193 * gboolean value_validate (GParamSpec *pspec,
195 * modify value contents in the least destructive way, so
196 * that it complies with pspec's requirements (i.e.
197 * according to minimum/maximum ranges etc...). return
198 * whether modification was necessary.
200 * gint values_cmp (GParamSpec *pspec,
201 * const GValue *value1,
202 * const GValue *value2):
203 * return value1 - value2, i.e. (-1) if value1 < value2,
204 * (+1) if value1 > value2, and (0) otherwise (equality)
209 #endif /* __G_PARAM_H__ */