Struct AutoScroll 

pub struct AutoScroll {
    pub edge_px: f64,
    pub max_px_per_s: f64,
}

How an auto_scroll_zone() scrolls: the edge band’s depth and the speed at the edge.

Fields

edge_px: f64

Depth of the band inside the top and bottom edges that scrolls, in logical px (default AUTO_SCROLL_EDGE_PX). Zero, negative or non-finite disables auto-scroll.

max_px_per_s: f64

Speed at the edge itself, in logical px per second (default AUTO_SCROLL_MAX_PX_PER_S); it falls off linearly to zero at the band’s inner boundary. Zero, negative or non-finite disables auto-scroll.

Implementations

impl AutoScroll

pub fn velocity(&self, zone: Rect, pointer: Point) -> f64

The scroll velocity, in px per second (negative toward the top), for a pointer at pointer over a zone whose window-space bounds are zone.

Zero outside zone and outside both edge bands. Inside a band the speed is max_px_per_s × depth / edge_px, depth being how far past the band’s inner boundary the pointer is. A zone shorter than two bands has them overlap; the nearer edge wins.

Trait Implementations

impl Clone for AutoScroll

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 AutoScroll

impl Debug for AutoScroll

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

Formats the value using the given formatter.

impl Default for AutoScroll

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for AutoScroll

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AutoScroll