Enum gdk4::ScrollDirection

#[non_exhaustive]
pub enum ScrollDirection {
    Up,
    Down,
    Left,
    Right,
    Smooth,
}

Specifies the direction for scroll events.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Up

the surface is scrolled up.

Down

the surface is scrolled down.

Left

the surface is scrolled to the left.

Right

the surface is scrolled to the right.

Smooth

the scrolling is determined by the delta values in scroll events. See gdk_scroll_event_get_deltas()

Trait Implementations

impl Clone for ScrollDirection

fn clone(&self) -> ScrollDirection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ScrollDirection

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

Formats the value using the given formatter.

impl From<ScrollDirection> for Value

fn from(v: ScrollDirection) -> Self

Converts to this type from the input type.

impl<'a> FromValue<'a> for ScrollDirection

type Checker = GenericValueTypeChecker<ScrollDirection>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl HasParamSpec for ScrollDirection

type ParamSpec = ParamSpecEnum

type SetValue = ScrollDirection

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

type BuilderFn = fn(_: &str, _: ScrollDirection) -> ParamSpecEnumBuilder<'_, ScrollDirection>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for ScrollDirection

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

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 Ord for ScrollDirection

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

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ScrollDirection

fn eq(&self, other: &ScrollDirection) -> 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 PartialOrd for ScrollDirection

fn partial_cmp(&self, other: &ScrollDirection) -> 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 ScrollDirection

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for ScrollDirection

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifier of self.

impl ValueType for ScrollDirection

type Type = ScrollDirection

Type to get the Type from.

impl Copy for ScrollDirection

impl Eq for ScrollDirection

impl StructuralPartialEq for ScrollDirection