### Class

# Gtk AppChooserButton

deprecated: 4.10

#### Description [src]

    final class Gtk.AppChooserButton : Gtk.Widget
      implements Gtk.Accessible, Gtk.AppChooser, Gtk.Buildable, Gtk.ConstraintTarget {
      /* No available fields */
    }

The `GtkAppChooserButton` lets the user select an application.

Initially, a `GtkAppChooserButton` selects the first application in its list, which will either be the most-recently used application or, if `GtkAppChooserButton:show-default-item` is `TRUE`, the default application.

The list of applications shown in a `GtkAppChooserButton` includes the recommended applications for the given content type. When `GtkAppChooserButton:show-default-item` is set, the default application is also included. To let the user chooser other applications, you can set the `GtkAppChooserButton:show-dialog-item` property, which allows to open a full `GtkAppChooserDialog`.

It is possible to add custom items to the list, using `gtk_app_chooser_button_append_custom_item()`. These items cause the `GtkAppChooserButton::custom-item-activated` signal to be emitted when they are selected.

To track changes in the selected application, use the `GtkAppChooserButton::changed` signal.

## CSS nodes

`GtkAppChooserButton` has a single CSS node with the name “appchooserbutton”.

Deprecated since: 4.10

The application selection widgets should be implemented according to the design of each platform and/or application requiring them.

#### Hierarchy

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- GtkAccessible
- GtkAppChooser
- GtkBuildable
- GtkConstraintTarget

#### Constructors

###### gtk_app_chooser_button_new

Creates a new `GtkAppChooserButton` for applications that can handle content of the given type.

deprecated: 4.10

#### Instance methods

###### gtk_app_chooser_button_append_custom_item

Appends a custom item to the list of applications that is shown in the popup.

deprecated: 4.10

###### gtk_app_chooser_button_append_separator

Appends a separator to the list of applications that is shown in the popup.

deprecated: 4.10

###### gtk_app_chooser_button_get_heading

Returns the text to display at the top of the dialog.

deprecated: 4.10

###### gtk_app_chooser_button_get_modal

Gets whether the dialog is modal.

deprecated: 4.10

###### gtk_app_chooser_button_get_show_default_item

Returns whether the dropdown menu should show the default application at the top.

deprecated: 4.10

###### gtk_app_chooser_button_get_show_dialog_item

Returns whether the dropdown menu shows an item for a `GtkAppChooserDialog`.

deprecated: 4.10

###### gtk_app_chooser_button_set_active_custom_item

Selects a custom item.

deprecated: 4.10

###### gtk_app_chooser_button_set_heading

Sets the text to display at the top of the dialog.

deprecated: 4.10

###### gtk_app_chooser_button_set_modal

Sets whether the dialog should be modal.

deprecated: 4.10

###### gtk_app_chooser_button_set_show_default_item

Sets whether the dropdown menu of this button should show the default application for the given content type at top.

deprecated: 4.10

###### gtk_app_chooser_button_set_show_dialog_item

Sets whether the dropdown menu of this button should show an entry to trigger a `GtkAppChooserDialog`.

deprecated: 4.10

##### Methods inherited from GtkWidget (162)

Please see GtkWidget for a full list of methods.

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

Please see GObject for a full list of methods.

##### Methods inherited from GtkAccessible (19)

###### gtk_accessible_announce

Requests the user’s screen reader to announce the given message.

since: 4.14

###### gtk_accessible_get_accessible_parent

Retrieves the accessible parent for an accessible object.

since: 4.10

###### gtk_accessible_get_accessible_role

Retrieves the accessible role of an accessible object.

###### gtk_accessible_get_at_context

Retrieves the accessible implementation for the given `GtkAccessible`.

since: 4.10

###### gtk_accessible_get_bounds

Queries the coordinates and dimensions of this accessible.

since: 4.10

###### gtk_accessible_get_first_accessible_child

Retrieves the first accessible child of an accessible object.

since: 4.10

###### gtk_accessible_get_next_accessible_sibling

Retrieves the next accessible sibling of an accessible object.

since: 4.10

###### gtk_accessible_get_platform_state

Query a platform state, such as focus.

since: 4.10

###### gtk_accessible_reset_property

Resets the accessible `property` to its default value.

###### gtk_accessible_reset_relation

Resets the accessible `relation` to its default value.

###### gtk_accessible_reset_state

Resets the accessible `state` to its default value.

###### gtk_accessible_set_accessible_parent

Sets the parent and sibling of an accessible object.

since: 4.10

###### gtk_accessible_update_next_accessible_sibling

Updates the next accessible sibling of `self`.

since: 4.10

###### gtk_accessible_update_property

Updates a list of accessible properties.

###### gtk_accessible_update_property_value

Updates an array of accessible properties.

###### gtk_accessible_update_relation

Updates a list of accessible relations.

###### gtk_accessible_update_relation_value

Updates an array of accessible relations.

###### gtk_accessible_update_state

Updates a list of accessible states. See the `GtkAccessibleState` documentation for the value types of accessible states.

###### gtk_accessible_update_state_value

Updates an array of accessible states.

##### Methods inherited from GtkAppChooser (3)

###### gtk_app_chooser_get_app_info

Returns the currently selected application.

deprecated: 4.10

###### gtk_app_chooser_get_content_type

Returns the content type for which the `GtkAppChooser` shows applications.

deprecated: 4.10

###### gtk_app_chooser_refresh

Reloads the list of applications.

deprecated: 4.10

##### Methods inherited from GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

#### Properties

###### Gtk.AppChooserButton:heading

The text to show at the top of the dialog that can be opened from the button.

###### Gtk.AppChooserButton:modal

Whether the app chooser dialog should be modal.

###### Gtk.AppChooserButton:show-default-item

Determines whether the dropdown menu shows the default application on top for the provided content type.

###### Gtk.AppChooserButton:show-dialog-item

Determines whether the dropdown menu shows an item to open a `GtkAppChooserDialog`.

##### Properties inherited from GtkWidget (34)

###### Gtk.Widget:can-focus

Whether the widget or any of its descendents can accept the input focus.

###### Gtk.Widget:can-target

Whether the widget can receive pointer events.

###### Gtk.Widget:css-classes

A list of css classes applied to this widget.

###### Gtk.Widget:css-name

The name of this widget in the CSS tree.

###### Gtk.Widget:cursor

The cursor used by `widget`.

###### Gtk.Widget:focus-on-click

Whether the widget should grab focus when it is clicked with the mouse.

###### Gtk.Widget:focusable

Whether this widget itself will accept the input focus.

###### Gtk.Widget:halign

How to distribute horizontal space if widget gets extra space.

###### Gtk.Widget:has-default

Whether the widget is the default widget.

###### Gtk.Widget:has-focus

Whether the widget has the input focus.

###### Gtk.Widget:has-tooltip

Enables or disables the emission of the ::query-tooltip signal on `widget`.

###### Gtk.Widget:height-request

Override for height request of the widget.

###### Gtk.Widget:hexpand

Whether to expand horizontally.

###### Gtk.Widget:hexpand-set

Whether to use the `hexpand` property.

###### Gtk.Widget:layout-manager

The `GtkLayoutManager` instance to use to compute the preferred size of the widget, and allocate its children.

###### Gtk.Widget:margin-bottom

Margin on bottom side of widget.

###### Gtk.Widget:margin-end

Margin on end of widget, horizontally.

###### Gtk.Widget:margin-start

Margin on start of widget, horizontally.

###### Gtk.Widget:margin-top

Margin on top side of widget.

###### Gtk.Widget:name

The name of the widget.

###### Gtk.Widget:opacity

The requested opacity of the widget.

###### Gtk.Widget:overflow

How content outside the widget’s content area is treated.

###### Gtk.Widget:parent

The parent widget of this widget.

###### Gtk.Widget:receives-default

Whether the widget will receive the default action when it is focused.

###### Gtk.Widget:root

The `GtkRoot` widget of the widget tree containing this widget.

###### Gtk.Widget:scale-factor

The scale factor of the widget.

###### Gtk.Widget:sensitive

Whether the widget responds to input.

###### Gtk.Widget:tooltip-markup

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

###### Gtk.Widget:tooltip-text

Sets the text of tooltip to be the given string.

###### Gtk.Widget:valign

How to distribute vertical space if widget gets extra space.

###### Gtk.Widget:vexpand

Whether to expand vertically.

###### Gtk.Widget:vexpand-set

Whether to use the `vexpand` property.

###### Gtk.Widget:visible

Whether the widget is visible.

###### Gtk.Widget:width-request

Override for width request of the widget.

##### Properties inherited from GtkAccessible (1)

###### GtkAccessible:accessible-role

The accessible role of the given `GtkAccessible` implementation.

##### Properties inherited from GtkAppChooser (1)

###### GtkAppChooser:content-type

The content type of the `GtkAppChooser` object.

#### Signals

###### Gtk.AppChooserButton::activate

Emitted to when the button is activated.

since: 4.4

###### Gtk.AppChooserButton::changed

Emitted when the active application changes.

###### Gtk.AppChooserButton::custom-item-activated

Emitted when a custom item is activated.

##### Signals inherited from GtkWidget (13)

###### GtkWidget::destroy

Signals that all holders of a reference to the widget should release the reference that they hold.

###### GtkWidget::direction-changed

Emitted when the text direction of a widget changes.

###### GtkWidget::hide

Emitted when `widget` is hidden.

###### GtkWidget::keynav-failed

Emitted if keyboard navigation fails.

###### GtkWidget::map

Emitted when `widget` is going to be mapped.

###### GtkWidget::mnemonic-activate

Emitted when a widget is activated via a mnemonic.

###### GtkWidget::move-focus

Emitted when the focus is moved.

###### GtkWidget::query-tooltip

Emitted when the widget’s tooltip is about to be shown.

###### GtkWidget::realize

Emitted when `widget` is associated with a `GdkSurface`.

###### GtkWidget::show

Emitted when `widget` is shown.

###### GtkWidget::state-flags-changed

Emitted when the widget state changes.

###### GtkWidget::unmap

Emitted when `widget` is going to be unmapped.

###### GtkWidget::unrealize

Emitted when the `GdkSurface` associated with `widget` is destroyed.

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

###### GObject::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.