晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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/*
 * Copyright © 2010 Codethink Limited
 *
 * This library 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 library 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 Lesser General
 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 * Authors: Ryan Lortie <desrt@desrt.ca>
 */

#ifndef __G_ACTION_GROUP_H__
#define __G_ACTION_GROUP_H__

#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
#error "Only <gio/gio.h> can be included directly."
#endif

#include <gio/giotypes.h>

G_BEGIN_DECLS


#define G_TYPE_ACTION_GROUP                                 (g_action_group_get_type ())
#define G_ACTION_GROUP(inst)                                (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
                                                             G_TYPE_ACTION_GROUP, GActionGroup))
#define G_IS_ACTION_GROUP(inst)                             (G_TYPE_CHECK_INSTANCE_TYPE ((inst),                     \
                                                             G_TYPE_ACTION_GROUP))
#define G_ACTION_GROUP_GET_IFACE(inst)                      (G_TYPE_INSTANCE_GET_INTERFACE ((inst),                  \
                                                             G_TYPE_ACTION_GROUP, GActionGroupInterface))

typedef struct _GActionGroupInterface                       GActionGroupInterface;

struct _GActionGroupInterface
{
  GTypeInterface g_iface;

  /* virtual functions */
  gboolean              (* has_action)                 (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  gchar **              (* list_actions)               (GActionGroup  *action_group);

  gboolean              (* get_action_enabled)         (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  const GVariantType *  (* get_action_parameter_type)  (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  const GVariantType *  (* get_action_state_type)      (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  GVariant *            (* get_action_state_hint)      (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  GVariant *            (* get_action_state)           (GActionGroup  *action_group,
                                                        const gchar   *action_name);

  void                  (* change_action_state)        (GActionGroup  *action_group,
                                                        const gchar   *action_name,
                                                        GVariant      *value);

  void                  (* activate_action)            (GActionGroup  *action_group,
                                                        const gchar   *action_name,
                                                        GVariant      *parameter);

  /* signals */
  void                  (* action_added)               (GActionGroup  *action_group,
                                                        const gchar   *action_name);
  void                  (* action_removed)             (GActionGroup  *action_group,
                                                        const gchar   *action_name);
  void                  (* action_enabled_changed)     (GActionGroup  *action_group,
                                                        const gchar   *action_name,
                                                        gboolean       enabled);
  void                  (* action_state_changed)       (GActionGroup   *action_group,
                                                        const gchar    *action_name,
                                                        GVariant       *state);

  /* more virtual functions */
  gboolean              (* query_action)               (GActionGroup        *action_group,
                                                        const gchar         *action_name,
                                                        gboolean            *enabled,
                                                        const GVariantType **parameter_type,
                                                        const GVariantType **state_type,
                                                        GVariant           **state_hint,
                                                        GVariant           **state);
};

GLIB_AVAILABLE_IN_ALL
GType                   g_action_group_get_type                         (void) G_GNUC_CONST;

GLIB_AVAILABLE_IN_ALL
gboolean                g_action_group_has_action                       (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
gchar **                g_action_group_list_actions                     (GActionGroup *action_group);

GLIB_AVAILABLE_IN_ALL
const GVariantType *    g_action_group_get_action_parameter_type        (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
const GVariantType *    g_action_group_get_action_state_type            (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
GVariant *              g_action_group_get_action_state_hint            (GActionGroup *action_group,
                                                                         const gchar  *action_name);

GLIB_AVAILABLE_IN_ALL
gboolean                g_action_group_get_action_enabled               (GActionGroup *action_group,
                                                                         const gchar  *action_name);

GLIB_AVAILABLE_IN_ALL
GVariant *              g_action_group_get_action_state                 (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
void                    g_action_group_change_action_state              (GActionGroup *action_group,
                                                                         const gchar  *action_name,
                                                                         GVariant     *value);

GLIB_AVAILABLE_IN_ALL
void                    g_action_group_activate_action                  (GActionGroup *action_group,
                                                                         const gchar  *action_name,
                                                                         GVariant     *parameter);

/* signals */
GLIB_AVAILABLE_IN_ALL
void                    g_action_group_action_added                     (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
void                    g_action_group_action_removed                   (GActionGroup *action_group,
                                                                         const gchar  *action_name);
GLIB_AVAILABLE_IN_ALL
void                    g_action_group_action_enabled_changed           (GActionGroup *action_group,
                                                                         const gchar  *action_name,
                                                                         gboolean      enabled);

GLIB_AVAILABLE_IN_ALL
void                    g_action_group_action_state_changed             (GActionGroup *action_group,
                                                                         const gchar  *action_name,
                                                                         GVariant     *state);

GLIB_AVAILABLE_IN_2_32
gboolean                g_action_group_query_action                     (GActionGroup        *action_group,
                                                                         const gchar         *action_name,
                                                                         gboolean            *enabled,
                                                                         const GVariantType **parameter_type,
                                                                         const GVariantType **state_type,
                                                                         GVariant           **state_hint,
                                                                         GVariant           **state);

G_END_DECLS

#endif /* __G_ACTION_GROUP_H__ */