## GtkAction

GtkAction — an action which can be triggered by a menu or toolbar item

## Synopsis

    #include <gtk/gtk.h>

    struct      GtkAction;
    GtkAction*  gtk_action_new                  (const gchar *name,
                                                 const gchar *label,
                                                 const gchar *tooltip,
                                                 const gchar *stock_id);
    const gchar* gtk_action_get_name            (GtkAction *action);
    gboolean    gtk_action_is_sensitive         (GtkAction *action);
    gboolean    gtk_action_get_sensitive        (GtkAction *action);
    gboolean    gtk_action_is_visible           (GtkAction *action);
    gboolean    gtk_action_get_visible          (GtkAction *action);
    void        gtk_action_activate             (GtkAction *action);
    GtkWidget*  gtk_action_create_icon          (GtkAction *action,
                                                 GtkIconSize icon_size);
    GtkWidget*  gtk_action_create_menu_item     (GtkAction *action);
    GtkWidget*  gtk_action_create_tool_item     (GtkAction *action);
    void        gtk_action_connect_proxy        (GtkAction *action,
                                                 GtkWidget *proxy);
    void        gtk_action_disconnect_proxy     (GtkAction *action,
                                                 GtkWidget *proxy);
    GSList*     gtk_action_get_proxies          (GtkAction *action);
    void        gtk_action_connect_accelerator  (GtkAction *action);
    void        gtk_action_disconnect_accelerator
                                                (GtkAction *action);
    void        gtk_action_block_activate_from  (GtkAction *action,
                                                 GtkWidget *proxy);
    void        gtk_action_unblock_activate_from
                                                (GtkAction *action,
                                                 GtkWidget *proxy);
    void        gtk_action_set_accel_path       (GtkAction *action,
                                                 const gchar *accel_path);
    void        gtk_action_set_accel_group      (GtkAction *action,
                                                 GtkAccelGroup *accel_group);

## Object Hierarchy

      GObject
       +----GtkAction
             +----GtkToggleAction

## Properties

      "action-group"         GtkActionGroup       : Read / Write
      "hide-if-empty"        gboolean             : Read / Write
      "is-important"         gboolean             : Read / Write
      "label"                gchararray           : Read / Write
      "name"                 gchararray           : Read / Write / Construct Only
      "sensitive"            gboolean             : Read / Write
      "short-label"          gchararray           : Read / Write
      "stock-id"             gchararray           : Read / Write
      "tooltip"              gchararray           : Read / Write
      "visible"              gboolean             : Read / Write
      "visible-horizontal"   gboolean             : Read / Write
      "visible-vertical"     gboolean             : Read / Write

## Signal Prototypes

    "activate"  void        user_function      (GtkAction *action,
                                                gpointer user_data);

## Description

Actions represent operations that the user can be perform, along with some information how it should be presented in the interface. Each action provides methods to create icons, menu items and toolbar items representing itself.

As well as the callback that is called when the action gets activated, the following also gets associated with the action:

- a name (not translated, for path lookup)

- a label (translated, for display)

- an accelerator

- whether label indicates a stock id

- a tooltip (optional, translated)

- a toolbar label (optional, shorter than label)

The action will also have some state information:

- visible (shown/hidden)

- sensitive (enabled/disabled)

Apart from regular actions, there are toggle actions, which can be toggled between two states and radio actions, of which only one in a group can be in the "active" state. Other actions can be implemented as GtkAction subclasses.

Each action can have one or more proxy menu item, toolbar button or other proxy widgets. Proxies mirror the state of the action (text label, tooltip, icon, visible, sensitive, etc), and should change when the action's state changes. When the proxy is activated, it should activate its action.

## Details

### struct GtkAction

    struct GtkAction;

The GtkAction struct contains only private members and should not be accessed directly.

### gtk_action_new ()

    GtkAction*  gtk_action_new                  (const gchar *name,
                                                 const gchar *label,
                                                 const gchar *tooltip,
                                                 const gchar *stock_id);

Creates a new GtkAction object. To add the action to a GtkActionGroup and set the accelerator for the action, call `gtk_action_group_add_action_with_accel()`.

`name` : | A unique name for the action
`label` : | the label displayed in menu items and on buttons
`tooltip` : | a tooltip for the action
`stock_id` : | the stock icon to display in widgets representing the action
Returns : | a new GtkAction

Since 2.4

### gtk_action_get_name ()

    const gchar* gtk_action_get_name            (GtkAction *action);

Returns the name of the action.

`action` : | the action object
Returns : | the name of the action. The string belongs to GTK+ and should not be freed.

Since 2.4

### gtk_action_is_sensitive ()

    gboolean    gtk_action_is_sensitive         (GtkAction *action);

Returns whether the action is effectively sensitive.

`action` : | the action object
Returns : | `TRUE` if the action and its associated action group are both sensitive.

Since 2.4

### gtk_action_get_sensitive ()

    gboolean    gtk_action_get_sensitive        (GtkAction *action);

Returns whether the action itself is sensitive. Note that this doesn't necessarily mean effective sensitivity. See `gtk_action_is_sensitive()` for that.

`action` : | the action object
Returns : | `TRUE` if the action itself is sensitive.

Since 2.4

### gtk_action_is_visible ()

    gboolean    gtk_action_is_visible           (GtkAction *action);

Returns whether the action is effectively visible.

`action` : | the action object
Returns : | `TRUE` if the action and its associated action group are both visible.

Since 2.4

### gtk_action_get_visible ()

    gboolean    gtk_action_get_visible          (GtkAction *action);

Returns whether the action itself is visible. Note that this doesn't necessarily mean effective visibility. See `gtk_action_is_sensitive()` for that.

`action` : | the action object
Returns : | `TRUE` if the action itself is visible.

Since 2.4

### gtk_action_activate ()

    void        gtk_action_activate             (GtkAction *action);

Emits the "activate" signal on the specified action, if it isn't insensitive. This gets called by the proxy widgets when they get activated.

It can also be used to manually activate an action.

`action` : | the action object

Since 2.4

### gtk_action_create_icon ()

    GtkWidget*  gtk_action_create_icon          (GtkAction *action,
                                                 GtkIconSize icon_size);

This function is intended for use by action implementations to create icons displayed in the proxy widgets.

`action` : | the action object
`icon_size` : | the size of the icon that should be created.
Returns : | a widget that displays the icon for this action.

Since 2.4

### gtk_action_create_menu_item ()

    GtkWidget*  gtk_action_create_menu_item     (GtkAction *action);

Creates a menu item widget that proxies for the given action.

`action` : | the action object
Returns : | a menu item connected to the action.

Since 2.4

### gtk_action_create_tool_item ()

    GtkWidget*  gtk_action_create_tool_item     (GtkAction *action);

Creates a toolbar item widget that proxies for the given action.

`action` : | the action object
Returns : | a toolbar item connected to the action.

Since 2.4

### gtk_action_connect_proxy ()

    void        gtk_action_connect_proxy        (GtkAction *action,
                                                 GtkWidget *proxy);

Connects a widget to an action object as a proxy. Synchronises various properties of the action with the widget (such as label text, icon, tooltip, etc), and attaches a callback so that the action gets activated when the proxy widget does.

If the widget is already connected to an action, it is disconnected first.

`action` : | the action object
`proxy` : | the proxy widget

Since 2.4

### gtk_action_disconnect_proxy ()

    void        gtk_action_disconnect_proxy     (GtkAction *action,
                                                 GtkWidget *proxy);

Disconnects a proxy widget from an action. Does not destroy the widget, however.

`action` : | the action object
`proxy` : | the proxy widget

Since 2.4

### gtk_action_get_proxies ()

    GSList*     gtk_action_get_proxies          (GtkAction *action);

Returns the proxy widgets for an action.

`action` : | the action object
Returns : | a GSList of proxy widgets. The list is owned by the action and must not be modified.

Since 2.4

### gtk_action_connect_accelerator ()

    void        gtk_action_connect_accelerator  (GtkAction *action);

Installs the accelerator for `action` if `action` has an accel path and group. See `gtk_action_set_accel_path()` and `gtk_action_set_accel_group()`

Since multiple proxies may independently trigger the installation of the accelerator, the `action` counts the number of times this function has been called and doesn't remove the accelerator until `gtk_action_disconnect_accelerator()` has been called as many times.

`action` : | a GtkAction

Since 2.4

### gtk_action_disconnect_accelerator ()

    void        gtk_action_disconnect_accelerator
                                                (GtkAction *action);

Undoes the effect of one call to `gtk_action_connect_accelerator()`.

`action` : | a GtkAction

Since 2.4

### gtk_action_block_activate_from ()

    void        gtk_action_block_activate_from  (GtkAction *action,
                                                 GtkWidget *proxy);

Disables calls to the `gtk_action_activate()` function by signals on the given proxy widget. This is used to break notification loops for things like check or radio actions.

This function is intended for use by action implementations.

`action` : | the action object
`proxy` : | a proxy widget

Since 2.4

### gtk_action_unblock_activate_from ()

    void        gtk_action_unblock_activate_from
                                                (GtkAction *action,
                                                 GtkWidget *proxy);

Re-enables calls to the `gtk_action_activate()` function by signals on the given proxy widget. This undoes the blocking done by `gtk_action_block_activate_from()`.

This function is intended for use by action implementations.

`action` : | the action object
`proxy` : | a proxy widget

Since 2.4

### gtk_action_set_accel_path ()

    void        gtk_action_set_accel_path       (GtkAction *action,
                                                 const gchar *accel_path);

Sets the accel path for this action. All proxy widgets associated with the action will have this accel path, so that their accelerators are consistent.

`action` : | the action object
`accel_path` : | the accelerator path

Since 2.4

### gtk_action_set_accel_group ()

    void        gtk_action_set_accel_group      (GtkAction *action,
                                                 GtkAccelGroup *accel_group);

Sets the GtkAccelGroup in which the accelerator for this action will be installed.

`action` : | the action object
`accel_group` : | a GtkAccelGroup or `NULL`

Since 2.4

## Properties

"`action-group`" (GtkActionGroup : Read / Write) | The GtkActionGroup this GtkAction is associated with, or NULL (for internal use).
"`hide-if-empty`" (gboolean : Read / Write) | When TRUE, empty menu proxies for this action are hidden.
"`is-important`" (gboolean : Read / Write) | Whether the action is considered important. When TRUE, toolitem proxies for this action show text in GTK_TOOLBAR_BOTH_HORIZ mode.
"`label`" (gchararray : Read / Write) | The label used for menu items and buttons that activate this action.
"`name`" (gchararray : Read / Write / Construct Only) | A unique name for the action.
"`sensitive`" (gboolean : Read / Write) | Whether the action is enabled.
"`short-label`" (gchararray : Read / Write) | A shorter label that may be used on toolbar buttons.
"`stock-id`" (gchararray : Read / Write) | The stock icon displayed in widgets representing this action.
"`tooltip`" (gchararray : Read / Write) | A tooltip for this action.
"`visible`" (gboolean : Read / Write) | Whether the action is visible.
"`visible-horizontal`" (gboolean : Read / Write) | Whether the toolbar item is visible when the toolbar is in a horizontal orientation.
"`visible-vertical`" (gboolean : Read / Write) | Whether the toolbar item is visible when the toolbar is in a vertical orientation.

## Signals

### The "activate" signal

    void        user_function                  (GtkAction *action,
                                                gpointer user_data);

The "activate" signal is emitted when the action is activated.

`action` : | the GtkAction
`user_data` : | user data set when the signal handler was connected.

Since 2.4

## See Also

GtkActionGroup, GtkUIManager