Enum nannou::event::MouseScrollDelta

pub enum MouseScrollDelta {
    LineDelta(f32, f32),
    PixelDelta(PhysicalPosition<f64>),
}

Describes a difference in the mouse scroll wheel state.

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) -> MouseScrollDelta

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MouseScrollDelta

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

Formats the value using the given formatter.

impl PartialEq for MouseScrollDelta

fn eq(&self, other: &MouseScrollDelta) -> 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 Copy for MouseScrollDelta

impl StructuralPartialEq for MouseScrollDelta