Struct ScrollState 

pub struct ScrollState {
    pub offset: usize,
    /* private fields */
}

State for a scrollable container.

Pass a mutable reference to Context::scrollable each frame. The context updates offset and the internal bounds automatically based on mouse wheel and drag events.

Fields

offset: usize

Current vertical scroll offset in rows.

Implementations

impl ScrollState

pub fn new() -> Self

Create scroll state starting at offset 0.

pub fn can_scroll_up(&self) -> bool

Check if scrolling upward is possible (offset is greater than 0).

pub fn can_scroll_down(&self) -> bool

Check if scrolling downward is possible (content extends below the viewport).

pub fn content_height(&self) -> u32

Get the total content height in rows.

pub fn viewport_height(&self) -> u32

Get the viewport height in rows.

pub fn progress(&self) -> f32

Get the scroll progress as a ratio in [0.0, 1.0].

pub fn scroll_up(&mut self, amount: usize)

Scroll up by the given number of rows, clamped to 0.

pub fn scroll_down(&mut self, amount: usize)

Scroll down by the given number of rows, clamped to the maximum offset.

Trait Implementations

impl Default for ScrollState

fn default() -> Self

Returns the “default value” for a type.