Struct MouseWheel 

pub struct MouseWheel {
    pub delta: Vec2,
    pub position: Vec2,
    pub local: Option<Vec2>,
}

Mouse-wheel scroll event. delta is in logical pixels and follows the DOM WheelEvent convention: positive y scrolls toward the end of the content (the wheel turned toward the user), positive x toward the right. Backends normalise line-based wheel input to pixels with a fixed 32 px/line.

Fields

delta: Vec2

Scroll delta in logical pixels.

position: Vec2

Cursor position at the moment of the scroll, used for hit-testing.

local: Option<Vec2>

The position relative to the target’s border box, when the backend measured that box itself: a page asks the browser, which lays it out. None leaves it to Lumen’s own layout, which is what a native window backend does.

Trait Implementations

impl Clone for MouseWheel

fn clone(&self) -> MouseWheel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MouseWheel

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

Formats the value using the given formatter.

impl Copy for MouseWheel

impl Message for MouseWheel

where Self: Send + Sync + 'static,