Struct ScrollState 

#[repr(C)]
pub struct ScrollState {
    pub scroll_position: LogicalPosition,
}

Current scroll position for a single scroll frame.

Fields

scroll_position: LogicalPosition

Amount in pixel that the current node is scrolled

Implementations

impl ScrollState

pub const fn get(&self) -> LogicalPosition

Return the current position of the scroll state

pub fn add(&mut self, x: f32, y: f32, max_scroll_rect: &LogicalRect)

Add a scroll X / Y onto the existing scroll state.

max_scroll_rect is the scroll range rect: its size is the maximum scrollable offset (content − viewport, clamped to >= 0), NOT the full content size. See ScrollStates::scroll_node. Clamping via .max(0.0) first also collapses any NaN input to 0.0 (f32::max returns the non-NaN operand), so a NaN delta can never poison the scroll position.

pub const fn set(&mut self, x: f32, y: f32, max_scroll_rect: &LogicalRect)

Set the scroll state to a new position.

max_scroll_rect is the scroll range rect (see ScrollState::add).

Trait Implementations

impl Clone for ScrollState

fn clone(&self) -> ScrollState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ScrollState

impl Debug for ScrollState

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

Formats the value using the given formatter.

impl Default for ScrollState

fn default() -> Self

Returns the “default value” for a type.

impl Eq for ScrollState

impl PartialEq for ScrollState

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ScrollState

fn partial_cmp(&self, other: &ScrollState) -> 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 ScrollState