GSimpleActionGroup

## GSimpleActionGroup GSimpleActionGroup — A simple GActionGroup implementation |

## Synopsis

                        GSimpleActionGroup;

    GSimpleActionGroup * g_simple_action_group_new          (void);

    GAction *           g_simple_action_group_lookup        (GSimpleActionGroup *simple,
                                                             const gchar *action_name);
    void                g_simple_action_group_insert        (GSimpleActionGroup *simple,
                                                             GAction *action);
    void                g_simple_action_group_remove        (GSimpleActionGroup *simple,
                                                             const gchar *action_name);

    struct              GActionEntry;
    void                g_simple_action_group_add_entries   (GSimpleActionGroup *simple,
                                                             const GActionEntry *entries,
                                                             gint n_entries,
                                                             gpointer user_data);

## Object Hierarchy

      GObject
       +----GSimpleActionGroup

## Implemented Interfaces

GSimpleActionGroup implements GActionGroup.

## Description

GSimpleActionGroup is a hash table filled with GAction objects, implementing the GActionGroup interface.

## Details

### GSimpleActionGroup

    typedef struct _GSimpleActionGroup GSimpleActionGroup;

The GSimpleActionGroup structure contains private data and should only be accessed using the provided API.

Since 2.28

### g_simple_action_group_new ()

    GSimpleActionGroup * g_simple_action_group_new          (void);

Creates a new, empty, GSimpleActionGroup.

Returns : | a new GSimpleActionGroup

Since 2.28

### g_simple_action_group_lookup ()

    GAction *           g_simple_action_group_lookup        (GSimpleActionGroup *simple,
                                                             const gchar *action_name);

Looks up the action with the name `action_name` in the group.

If no such action exists, returns `NULL`.

`simple` : | a GSimpleActionGroup
`action_name` : | the name of an action
Returns : | a GAction, or `NULL`. [transfer none]

Since 2.28

### g_simple_action_group_insert ()

    void                g_simple_action_group_insert        (GSimpleActionGroup *simple,
                                                             GAction *action);

Adds an action to the action group.

If the action group already contains an action with the same name as `action` then the old action is dropped from the group.

The action group takes its own reference on `action`.

`simple` : | a GSimpleActionGroup
`action` : | a GAction

Since 2.28

### g_simple_action_group_remove ()

    void                g_simple_action_group_remove        (GSimpleActionGroup *simple,
                                                             const gchar *action_name);

Removes the named action from the action group.

If no action of this name is in the group then nothing happens.

`simple` : | a GSimpleActionGroup
`action_name` : | the name of the action

Since 2.28

### struct GActionEntry

    struct GActionEntry {
      const gchar *name;

      void (* activate) (GSimpleAction *action,
                         GVariant      *parameter,
                         gpointer       user_data);

      const gchar *parameter_type;

      const gchar *state;

      void (* change_state) (GSimpleAction *action,
                             GVariant      *value,
                             gpointer       user_data);
    };

This struct defines a single action. It is for use with `g_simple_action_group_add_entries()`.

The order of the items in the structure are intended to reflect frequency of use. It is permissible to use an incomplete initialiser in order to leave some of the later values as `NULL`. All values after `name` are optional. Additional optional fields may be added in the future.

See `g_simple_action_group_add_entries()` for an example.

const gchar *`name`; | the name of the action
`activate` () | the callback to connect to the "activate" signal of the action
const gchar *`parameter_type`; | the type of the parameter that must be passed to the activate function for this action, given as a single GVariant type string (or `NULL` for no parameter)
const gchar *`state`; | the initial state for this action, given in GVariant text format. The state is parsed with no extra type information, so type tags must be added to the string if they are necessary.
`change_state` () | the callback to connect to the "change-state" signal of the action

### g_simple_action_group_add_entries ()

    void                g_simple_action_group_add_entries   (GSimpleActionGroup *simple,
                                                             const GActionEntry *entries,
                                                             gint n_entries,
                                                             gpointer user_data);

A convenience function for creating multiple GSimpleAction instances and adding them to the action group.

Each action is constructed as per one GActionEntry.

Example 13. Using `g_simple_action_group_add_entries()`

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    static void
    activate_quit (GSimpleAction *simple,
                   GVariant      *parameter,
                   gpointer       user_data)
    {
      exit (0);
    }

    static void
    activate_print_string (GSimpleAction *simple,
                           GVariant      *parameter,
                           gpointer       user_data)
    {
      g_print ("%s\n", g_variant_get_string (parameter, NULL));
    }

    static GActionGroup *
    create_action_group (void)
    {
      const GActionEntry entries[] = {
        { "quit",         activate_quit              },
        { "print-string", activate_print_string, "s" }
      };
      GSimpleActionGroup *group;

      group = g_simple_action_group_new ();
      g_simple_action_group_add_entries (group, entries, G_N_ELEMENTS (entries), NULL);

      return G_ACTION_GROUP (group);
    }

`simple` : | a GSimpleActionGroup
`entries` : | a pointer to the first item in an array of GActionEntry structs
`n_entries` : | the length of `entries`, or -1
`user_data` : | the user data for signal connections

Since 2.30