pub enum WheelDelta {
    Pixels(PixelsVector),
    Lines(LinesVector),
    Pages(PagesVector),
}
Expand description

A vector representing the amount the mouse wheel was moved

This may be expressed in Pixels, Lines or Pages

Variants§

§

Pixels(PixelsVector)

Movement in Pixels

§

Lines(LinesVector)

Movement in Lines

§

Pages(PagesVector)

Movement in Pages

Implementations§

source§

impl WheelDelta

source

pub fn pixels(x: f64, y: f64, z: f64) -> Self

Convenience function for constructing a WheelDelta with pixel units

source

pub fn lines(x: f64, y: f64, z: f64) -> Self

Convenience function for constructing a WheelDelta with line units

source

pub fn pages(x: f64, y: f64, z: f64) -> Self

Convenience function for constructing a WheelDelta with page units

source

pub fn is_zero(&self) -> bool

Returns true iff there is no wheel movement

i.e. the x, y and z delta is zero (disregards units)

source

pub fn strip_units(&self) -> Vector3D<f64, UnknownUnit>

A Vector3D proportional to the amount scrolled

Note that this disregards the 3 possible units: this could be expressed in terms of pixels, lines, or pages.

In most cases, to properly handle scrolling, you should handle all 3 possible enum variants instead of stripping units. Otherwise, if you assume that the units will always be pixels, the user may experience some unexpectedly slow scrolling if their mouse/OS sends values expressed in lines or pages.

Trait Implementations§

source§

impl Clone for WheelDelta

source§

fn clone(&self) -> WheelDelta

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl Debug for WheelDelta

source§

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

Formats the value using the given formatter. Read more
source§

impl<'de> Deserialize<'de> for WheelDelta

source§

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
source§

impl Serialize for WheelDelta

source§

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
source§

impl Copy for WheelDelta

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for Twhere T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for Twhere T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for Twhere T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for Twhere U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> ToOwned for Twhere T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<T> DeserializeOwned for Twhere T: for<'de> Deserialize<'de>,