Struct gtk4::Adjustment

#[repr(transparent)]
pub struct Adjustment { /* private fields */ }

Adjustment is a model for a numeric value.

The `GtkAdjustment has an associated lower and upper bound. It also contains step and page increments, and a page size.

Adjustments are used within several GTK widgets, including SpinButton, Viewport, Scrollbar and Scale.

The Adjustment object does not update the value itself. Instead it is left up to the owner of the Adjustment to control the value.

Properties

lower

The minimum value of the adjustment.

Readable | Writeable

page-increment

The page increment of the adjustment.

Readable | Writeable

page-size

The page size of the adjustment.

Note that the page-size is irrelevant and should be set to zero if the adjustment is used for a simple scalar value, e.g. in a SpinButton.

Readable | Writeable

step-increment

The step increment of the adjustment.

Readable | Writeable

upper

The maximum value of the adjustment.

Note that values will be restricted by upper - page-size if the page-size property is nonzero.

Readable | Writeable

value

The value of the adjustment.

Readable | Writeable

Signals

changed

Emitted when one or more of the Adjustment properties have been changed.

Note that the value property is covered by the value-changed signal.

value-changed

Emitted when the value has been changed.

Implements

AdjustmentExt, glib::ObjectExt

Implementations

impl Adjustment

pub const NONE: Option<&'static Adjustment> = None

pub fn new( value: f64, lower: f64, upper: f64, step_increment: f64, page_increment: f64, page_size: f64 ) -> Adjustment

Creates a new Adjustment.

value

the initial value

lower

the minimum value

upper

the maximum value

step_increment

the step increment

page_increment

the page increment

page_size

the page size

Returns

a new Adjustment

pub fn builder() -> AdjustmentBuilder

Creates a new builder-pattern struct instance to construct Adjustment objects.

This method returns an instance of AdjustmentBuilder which can be used to create Adjustment objects.

Trait Implementations

impl Clone for Adjustment

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Adjustment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Adjustment

fn default() -> Self

Returns the “default value” for a type.

impl Display for Adjustment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl HasParamSpec for Adjustment

type ParamSpec = ParamSpecObject

type SetValue = Adjustment

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, Adjustment>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for Adjustment

fn hash<H>(&self, state: &mut H)where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: AdjustmentImpl> IsSubclassable<T> for Adjustment

fn class_init(class: &mut Class<Self>)

Override the virtual methods of this class for the given subclass and do other class initialization.

fn instance_init(instance: &mut InitializingObject<T>)

Instance specific initialization.

impl Ord for Adjustment

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl ParentClassIs for Adjustment

type Parent = Object

impl<OT: ObjectType> PartialEq<OT> for Adjustment

fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for Adjustment

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for Adjustment

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for Adjustment