Gtk.Range
Description: Reference for Gtk.Range

### Class

# GtkRange

#### Description [src]

    class Gtk.Range : Gtk.Widget {
      parent_instance: GtkWidget
    }

`GtkRange` is the common base class for widgets which visualize an adjustment.

Widgets that are derived from `GtkRange` include `GtkScale` and `GtkScrollbar`.

Apart from signals for monitoring the parameters of the adjustment, `GtkRange` provides properties and methods for setting a “fill level” on range widgets. See `gtk_range_set_fill_level()`.

#### Ancestors

- GtkWidget
- GInitiallyUnowned
- GObject

#### Implements

- GtkAccessible
- GtkBuildable
- GtkConstraintTarget
- GtkOrientable

#### Instance methods

###### gtk_range_get_adjustment

Get the adjustment which is the “model” object for `GtkRange`.

###### gtk_range_get_fill_level

Gets the current position of the fill level indicator.

###### gtk_range_get_flippable

Gets whether the `GtkRange` respects text direction.

###### gtk_range_get_inverted

Gets whether the range is inverted.

###### gtk_range_get_range_rect

This function returns the area that contains the range’s trough, in coordinates relative to `range`‘s origin.

###### gtk_range_get_restrict_to_fill_level

Gets whether the range is restricted to the fill level.

###### gtk_range_get_round_digits

Gets the number of digits to round the value to when it changes.

###### gtk_range_get_show_fill_level

Gets whether the range displays the fill level graphically.

###### gtk_range_get_slider_range

This function returns sliders range along the long dimension, in widget->window coordinates.

###### gtk_range_get_slider_size_fixed

This function is useful mainly for `GtkRange` subclasses.

###### gtk_range_get_value

Gets the current value of the range.

###### gtk_range_set_adjustment

Sets the adjustment to be used as the “model” object for the `GtkRange`

###### gtk_range_set_fill_level

Set the new position of the fill level indicator.

###### gtk_range_set_flippable

Sets whether the `GtkRange` respects text direction.

###### gtk_range_set_increments

Sets the step and page sizes for the range.

###### gtk_range_set_inverted

Sets whether to invert the range.

###### gtk_range_set_range

Sets the allowable values in the `GtkRange`.

###### gtk_range_set_restrict_to_fill_level

Sets whether the slider is restricted to the fill level.

###### gtk_range_set_round_digits

Sets the number of digits to round the value to when it changes.

###### gtk_range_set_show_fill_level

Sets whether a graphical fill level is show on the trough.

###### gtk_range_set_slider_size_fixed

Sets whether the range’s slider has a fixed size, or a size that depends on its adjustment’s page size.

###### gtk_range_set_value

Sets the current value of the range.

##### 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.

##### Methods inherited from GtkOrientable (2)

###### gtk_orientable_get_orientation

Retrieves the orientation of the `orientable`.

###### gtk_orientable_set_orientation

Sets the orientation of the `orientable`.

#### Properties

###### Gtk.Range:adjustment

The adjustment that is controlled by the range.

###### Gtk.Range:fill-level

The fill level (e.g. prebuffering of a network stream).

###### Gtk.Range:inverted

If `TRUE`, the direction in which the slider moves is inverted.

###### Gtk.Range:restrict-to-fill-level

Controls whether slider movement is restricted to an upper boundary set by the fill level.

###### Gtk.Range:round-digits

The number of digits to round the value to when it changes.

###### Gtk.Range:show-fill-level

Controls whether fill level indicator graphics are displayed on the trough.

##### 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.

##### Properties inherited from GtkOrientable (1)

###### Gtk.Orientable:orientation

The orientation of the orientable.

#### Signals

###### Gtk.Range::adjust-bounds

Emitted before clamping a value, to give the application a chance to adjust the bounds.

###### Gtk.Range::change-value

Emitted when a scroll action is performed on a range.

###### Gtk.Range::move-slider

Virtual function that moves the slider.

###### Gtk.Range::value-changed

Emitted when the range value changes.

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

###### Gtk.Widget::destroy

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

###### Gtk.Widget::direction-changed

Emitted when the text direction of a widget changes.

###### Gtk.Widget::hide

Emitted when `widget` is hidden.

###### Gtk.Widget::keynav-failed

Emitted if keyboard navigation fails.

###### Gtk.Widget::map

Emitted when `widget` is going to be mapped.

###### Gtk.Widget::mnemonic-activate

Emitted when a widget is activated via a mnemonic.

###### Gtk.Widget::move-focus

Emitted when the focus is moved.

###### Gtk.Widget::query-tooltip

Emitted when the widgets tooltip is about to be shown.

###### Gtk.Widget::realize

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

###### Gtk.Widget::show

Emitted when `widget` is shown.

###### Gtk.Widget::state-flags-changed

Emitted when the widget state changes.

###### Gtk.Widget::unmap

Emitted when `widget` is going to be unmapped.

###### Gtk.Widget::unrealize

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

#### Class structure

    struct GtkRangeClass {
      GtkWidgetClass parent_class;
      void (* value_changed) (
        GtkRange* range
      );
      void (* adjust_bounds) (
        GtkRange* range,
        double new_value
      );
      void (* move_slider) (
        GtkRange* range,
        GtkScrollType scroll
      );
      void (* get_range_border) (
        GtkRange* range,
        GtkBorder* border_
      );
      gboolean (* change_value) (
        GtkRange* range,
        GtkScrollType scroll,
        double new_value
      );

    }

###### Class members

`parent_class` |
    GtkWidgetClass
| No description available.
`value_changed` |
    void (* value_changed) (
        GtkRange* range
      )
| No description available.
`adjust_bounds` |
    void (* adjust_bounds) (
        GtkRange* range,
        double new_value
      )
| No description available.
`move_slider` |
    void (* move_slider) (
        GtkRange* range,
        GtkScrollType scroll
      )
| No description available.
`get_range_border` |
    void (* get_range_border) (
        GtkRange* range,
        GtkBorder* border_
      )
| No description available.
`change_value` |
    gboolean (* change_value) (
        GtkRange* range,
        GtkScrollType scroll,
        double new_value
      )
| No description available.

#### Virtual methods

###### Gtk.RangeClass.adjust_bounds

No description available.

###### Gtk.RangeClass.change_value

No description available.

###### Gtk.RangeClass.get_range_border

No description available.

###### Gtk.RangeClass.move_slider

No description available.

###### Gtk.RangeClass.value_changed

No description available.