Enum MouseScrollDelta 

#[non_exhaustive]
pub enum MouseScrollDelta {
    LineDelta(f32, f32),
    PixelDelta(PhysicalPosition<f64>),
}

Describes a difference in the mouse scroll wheel state.

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.

LineDelta(f32, f32)

Amount in lines or rows to scroll in the horizontal and vertical directions.

Positive values indicate that the content that is being scrolled should move right and down (revealing more content left and up).

PixelDelta(PhysicalPosition<f64>)

Amount in pixels to scroll in the horizontal and vertical direction.

Scroll events are expressed as a PixelDelta if supported by the device (eg. a touchpad) and platform.

Positive values indicate that the content being scrolled should move right/down.

For a ‘natural scrolling’ touch pad (that acts like a touch screen) this means moving your fingers right and down should give positive values, and move the content right and down (to reveal more things left and up).

Trait Implementations

impl Clone for MouseScrollDelta

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MouseScrollDelta

impl Debug for MouseScrollDelta

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

Formats the value using the given formatter.

impl PartialEq for MouseScrollDelta

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for MouseScrollDelta