Struct ScrollPosition 

pub struct ScrollPosition {
    pub parent_rect: LogicalRect,
    pub children_rect: LogicalRect,
}

Information about a scroll frame, given to the user by the framework.

The two rects are NOT in the same coordinate space — never subtract one origin from the other. That silent ambiguity put the scrollbar thumb partway down the track for every container not at the window origin. See ScrollManager::get_scroll_states_for_dom for the producer.

Fields

parent_rect: LogicalRect

The scroll container’s border box in ABSOLUTE window coordinates. size is the scrollport (“how big is the parent container”, so “scroll to left edge” can be implemented); origin is where that container sits on screen and is only meaningful to scroll-into-view.

children_rect: LogicalRect

size = the scrollable content (“the union of all children”, or the VirtualView virtual size when one was reported). origin = the SCROLL OFFSET ITSELF — distance already scrolled from the scroll origin, normally clamped to [0, content − container]. It is NOT an absolute position and NOT relative to parent_rect.origin; content paints at position − origin.

Trait Implementations

impl Clone for ScrollPosition

fn clone(&self) -> ScrollPosition

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScrollPosition

impl Debug for ScrollPosition

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

Formats the value using the given formatter.

impl Eq for ScrollPosition

impl PartialEq for ScrollPosition

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ScrollPosition

fn partial_cmp(&self, other: &ScrollPosition) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for ScrollPosition