### Class

# Adw Application

#### Description [src]

    class Adw.Application : Gtk.Application {
      parent_instance: GtkApplication
    }

A base class for Adwaita applications.

`AdwApplication` handles library initialization by calling `adw_init()` in the default `GApplication::startup` signal handler, in turn chaining up as required by `GtkApplication`. Therefore, any subclass of `AdwApplication` should always chain up its `startup` handler before using any Adwaita or GTK API.

## Automatic Resources

`AdwApplication` will automatically load stylesheets located in the application’s resource base path (see `g_application_set_resource_base_path()`, if they’re present.

They can be used to add custom styles to the application, as follows:

- `style.css` contains styles that are always present.

- `style-dark.css` contains styles only used when `AdwStyleManager:dark` is `TRUE`.

- `style-hc.css` contains styles used when the system high contrast preference is enabled.

- `style-hc-dark.css` contains styles used when the system high contrast preference is enabled and `AdwStyleManager:dark` is `TRUE`.

Available since: | 1.0

#### Hierarchy

#### Ancestors

- GtkApplication
- GApplication
- GObject

#### Implements

- GActionGroup
- GActionMap

#### Constructors

###### adw_application_new

Creates a new `AdwApplication`.

Available since: 1.0

#### Instance methods

###### adw_application_get_style_manager

Gets the style manager for `self`.

Available since: 1.0

##### Methods inherited from GtkApplication (14)

###### gtk_application_add_window

Adds a window to `application`.

###### gtk_application_get_accels_for_action

Gets the accelerators that are currently associated with the given action.

###### gtk_application_get_actions_for_accel

Returns the list of actions (possibly empty) that `accel` maps to.

###### gtk_application_get_active_window

Gets the “active” window for the application.

###### gtk_application_get_menu_by_id

Gets a menu from automatically loaded resources.

###### gtk_application_get_menubar

Returns the menu model that has been set with `gtk_application_set_menubar()`.

###### gtk_application_get_window_by_id

Returns the `GtkApplicationWindow` with the given ID.

###### gtk_application_get_windows

Gets a list of the `GtkWindow` instances associated with `application`.

###### gtk_application_inhibit

Inform the session manager that certain types of actions should be inhibited.

###### gtk_application_list_action_descriptions

Lists the detailed action names which have associated accelerators.

###### gtk_application_remove_window

Remove a window from `application`.

###### gtk_application_set_accels_for_action

Sets zero or more keyboard accelerators that will trigger the given action.

###### gtk_application_set_menubar

Sets or unsets the menubar for windows of `application`.

###### gtk_application_uninhibit

Removes an inhibitor that has been previously established.

##### Methods inherited from GApplication (34)

##### Methods inherited from GObject (43)

##### Methods inherited from GActionGroup (14)

###### g_action_group_action_added

Emits the `GActionGroup::action-added` signal on `action_group`.

Available since: 2.28

###### g_action_group_action_enabled_changed

Emits the `GActionGroup::action-enabled-changed` signal on `action_group`.

Available since: 2.28

###### g_action_group_action_removed

Emits the `GActionGroup::action-removed` signal on `action_group`.

Available since: 2.28

###### g_action_group_action_state_changed

Emits the `GActionGroup::action-state-changed` signal on `action_group`.

Available since: 2.28

###### g_action_group_activate_action

Activate the named action within `action_group`.

Available since: 2.28

###### g_action_group_change_action_state

Request for the state of the named action within `action_group` to be changed to `value`.

Available since: 2.28

###### g_action_group_get_action_enabled

Checks if the named action within `action_group` is currently enabled.

Available since: 2.28

###### g_action_group_get_action_parameter_type

Queries the type of the parameter that must be given when activating the named action within `action_group`.

Available since: 2.28

###### g_action_group_get_action_state

Queries the current state of the named action within `action_group`.

Available since: 2.28

###### g_action_group_get_action_state_hint

Requests a hint about the valid range of values for the state of the named action within `action_group`.

Available since: 2.28

###### g_action_group_get_action_state_type

Queries the type of the state of the named action within `action_group`.

Available since: 2.28

###### g_action_group_has_action

Checks if the named action exists within `action_group`.

Available since: 2.28

###### g_action_group_list_actions

Lists the actions contained within `action_group`.

Available since: 2.28

###### g_action_group_query_action

Queries all aspects of the named action within an `action_group`.

Available since: 2.32

##### Methods inherited from GActionMap (4)

###### g_action_map_add_action

Adds an action to the `action_map`.

Available since: 2.32

###### g_action_map_add_action_entries

A convenience function for creating multiple `GSimpleAction` instances and adding them to a `GActionMap`.

Available since: 2.32

###### g_action_map_lookup_action

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

Available since: 2.32

###### g_action_map_remove_action

Removes the named action from the action map.

Available since: 2.32

#### Properties

###### Adw.Application:style-manager

The style manager for this application.

Available since: 1.0

##### Properties inherited from GtkApplication (4)

###### Gtk.Application:active-window

The currently focused window of the application.

###### Gtk.Application:menubar

The `GMenuModel` to be used for the application’s menu bar.

###### Gtk.Application:register-session

Set this property to `TRUE` to register with the session manager.

###### Gtk.Application:screensaver-active

This property is `TRUE` if GTK believes that the screensaver is currently active.

##### Properties inherited from GApplication (8)

###### Gio.Application:action-group

No description available.

###### Gio.Application:application-id

No description available.

###### Gio.Application:flags

No description available.

###### Gio.Application:inactivity-timeout

No description available.

###### Gio.Application:is-busy

Whether the application is currently marked as busy through `g_application_mark_busy()` or g_application_bind_busy_property().

Available since: 2.44

###### Gio.Application:is-registered

No description available.

###### Gio.Application:is-remote

No description available.

###### Gio.Application:resource-base-path

No description available.

#### Signals

##### Signals inherited from GtkApplication (3)

###### Gtk.Application::query-end

Emitted when the session manager is about to end the session.

###### Gtk.Application::window-added

Emitted when a `GtkWindow` is added to `application` through `gtk_application_add_window()`.

###### Gtk.Application::window-removed

Emitted when a `GtkWindow` is removed from `application`.

##### Signals inherited from GApplication (7)

###### Gio.Application::activate

The ::activate signal is emitted on the primary instance when an activation occurs. See g_application_activate().

###### Gio.Application::command-line

The ::command-line signal is emitted on the primary instance when a commandline is not handled locally. See `g_application_run()` and the `GApplicationCommandLine` documentation for more information.

###### Gio.Application::handle-local-options

The ::handle-local-options signal is emitted on the local instance after the parsing of the commandline options has occurred.

Available since: 2.40

###### Gio.Application::name-lost

The ::name-lost signal is emitted only on the registered primary instance when a new instance has taken over. This can only happen if the application is using the `G_APPLICATION_ALLOW_REPLACEMENT` flag.

Available since: 2.60

###### Gio.Application::open

The ::open signal is emitted on the primary instance when there are files to open. See `g_application_open()` for more information.

###### Gio.Application::shutdown

The ::shutdown signal is emitted only on the registered primary instance immediately after the main loop terminates.

###### Gio.Application::startup

The ::startup signal is emitted on the primary instance immediately after registration. See g_application_register().

##### Signals inherited from GObject (1)

###### GObject.Object::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

##### Signals inherited from GActionGroup (4)

###### Gio.ActionGroup::action-added

Signals that a new action was just added to the group. This signal is emitted after the action has been added and is now visible.

Available since: 2.28

###### Gio.ActionGroup::action-enabled-changed

Signals that the enabled status of the named action has changed.

Available since: 2.28

###### Gio.ActionGroup::action-removed

Signals that an action is just about to be removed from the group. This signal is emitted before the action is removed, so the action is still visible and can be queried from the signal handler.

Available since: 2.28

###### Gio.ActionGroup::action-state-changed

Signals that the state of the named action has changed.

Available since: 2.28

#### Class structure

    struct AdwApplicationClass {
      GtkApplicationClass parent_class;

    }

###### Class members

`parent_class` |
    GtkApplicationClass
| The parent class.