Gtk.AspectFrame
Description: Reference for Gtk.AspectFrame

### Class

# GtkAspectFrame

#### Description [src]

    final class Gtk.AspectFrame : Gtk.Widget {
      /* No available fields */
    }

`GtkAspectFrame` preserves the aspect ratio of its child.

The frame can respect the aspect ratio of the child widget, or use its own aspect ratio.

# CSS nodes

`GtkAspectFrame` uses a CSS node with name `frame`.

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget

#### Constructors

###### gtk_aspect_frame_new

Create a new `GtkAspectFrame`.

#### Instance methods

###### gtk_aspect_frame_get_child

Gets the child widget of `self`.

###### gtk_aspect_frame_get_obey_child

Returns whether the child’s size request should override the set aspect ratio of the `GtkAspectFrame`.

###### gtk_aspect_frame_get_ratio

Returns the desired aspect ratio of the child.

###### gtk_aspect_frame_get_xalign

Returns the horizontal alignment of the child within the allocation of the `GtkAspectFrame`.

###### gtk_aspect_frame_get_yalign

Returns the vertical alignment of the child within the allocation of the `GtkAspectFrame`.

###### gtk_aspect_frame_set_child

Sets the child widget of `self`.

###### gtk_aspect_frame_set_obey_child

Sets whether the aspect ratio of the child’s size request should override the set aspect ratio of the `GtkAspectFrame`.

###### gtk_aspect_frame_set_ratio

Sets the desired aspect ratio of the child.

###### gtk_aspect_frame_set_xalign

Sets the horizontal alignment of the child within the allocation of the `GtkAspectFrame`.

###### gtk_aspect_frame_set_yalign

Sets the vertical alignment of the child within the allocation of the `GtkAspectFrame`.

##### Methods inherited from GtkWidget (159)

###### gtk_widget_action_set_enabled

Enable or disable an action installed with `gtk_widget_class_install_action()`.

###### gtk_widget_activate

For widgets that can be “activated” (buttons, menu items, etc.), this function activates them.

###### gtk_widget_activate_action

Looks up the action in the action groups associated with `widget` and its ancestors, and activates it.

###### gtk_widget_activate_action_variant

Looks up the action in the action groups associated with `widget` and its ancestors, and activates it.

###### gtk_widget_activate_default

Activates the `default.activate` action from `widget`.

###### gtk_widget_add_controller

Adds `controller` to `widget` so that it will receive events.

###### gtk_widget_add_css_class

Adds a style class to `widget`.

###### gtk_widget_add_mnemonic_label

Adds a widget to the list of mnemonic labels for this widget.

###### gtk_widget_add_tick_callback

Queues an animation frame update and adds a callback to be called before each frame.

###### gtk_widget_allocate

This function is only used by `GtkWidget` subclasses, to assign a size, position and (optionally) baseline to their child widgets.

###### gtk_widget_child_focus

Called by widgets as the user moves around the window using keyboard shortcuts.

###### gtk_widget_compute_bounds

Computes the bounds for `widget` in the coordinate space of `target`.

###### gtk_widget_compute_expand

Computes whether a container should give this widget extra space when possible.

###### gtk_widget_compute_point

Translates the given `point` in `widget`‘s coordinates to coordinates relative to `target`’s coordinate system.

###### gtk_widget_compute_transform

Computes a matrix suitable to describe a transformation from `widget`‘s coordinate system into `target`‘s coordinate system.

###### gtk_widget_contains

Tests if the point at (`x`, `y`) is contained in `widget`.

###### gtk_widget_create_pango_context

Creates a new `PangoContext` with the appropriate font map, font options, font description, and base direction for drawing text for this widget.

###### gtk_widget_create_pango_layout

Creates a new `PangoLayout` with the appropriate font map, font description, and base direction for drawing text for this widget.

###### gtk_drag_check_threshold

Checks to see if a drag movement has passed the GTK drag threshold.

###### gtk_widget_error_bell

Notifies the user about an input-related error on this widget.

###### gtk_widget_get_allocated_baseline

Returns the baseline that has currently been allocated to `widget`.

###### gtk_widget_get_allocated_height

Returns the height that has currently been allocated to `widget`.

###### gtk_widget_get_allocated_width

Returns the width that has currently been allocated to `widget`.

##### Methods inherited from GtkAccessible (10)

###### gtk_accessible_get_accessible_role

Retrieves the `GtkAccessibleRole` for the given `GtkAccessible`.

###### 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_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 GtkBuildable (1)

###### gtk_buildable_get_buildable_id

Gets the ID of the `buildable` object.

#### Properties

###### Gtk.AspectFrame:child

The child widget.

###### Gtk.AspectFrame:obey-child

Whether the `GtkAspectFrame` should use the aspect ratio of its child.

###### Gtk.AspectFrame:ratio

The aspect ratio to be used by the `GtkAspectFrame`.

###### Gtk.AspectFrame:xalign

The horizontal alignment of the child.

###### Gtk.AspectFrame:yalign

The vertical alignment of the child.

##### 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)

###### Gtk.Accessible:accessible-role

The accessible role of the given `GtkAccessible` implementation.