Struct ChartState 

pub struct ChartState { /* private fields */ }

Backend chart state – owns bar data, time-scale coordinate system, price auto-scaling logic, and zoom history.

This is the pure-logic layer with no UI or rendering dependencies. The UI layer reads from ChartState to determine what to draw and writes back interaction results (scroll, zoom, data updates).

Example

use egui_charts::model::{BarData, ChartState};

let data = BarData::new();
let state = ChartState::new(data);
assert!(state.visible_data().is_empty());

Implementations

impl ChartState

pub fn new(data: BarData) -> Self

Create new chart state with data

pub fn data(&self) -> &BarData

Get reference to bar data

pub fn time_scale_mut(&mut self) -> &mut TimeScale

Get mutable reference to time scale

pub fn time_scale(&self) -> &TimeScale

Get reference to time scale

pub fn set_data(&mut self, data: BarData)

Update data (also updates bar count in time scale)

pub fn visible_data(&self) -> &[Bar]

Get visible data based on current time scale

pub fn visible_range(&self) -> (usize, usize)

Get visible data range indices

pub fn set_price_auto_scale(&mut self, enabled: bool)

Enable/disable price auto-scaling

pub fn set_price_range(&mut self, min: f64, max: f64)

Set manual price range

pub fn price_range(&self) -> (f64, f64)

Get price range (auto-calculated or manual)

pub fn is_price_auto_scale(&self) -> bool

Check if price auto-scaling is enabled

pub fn push_zoom_state(&mut self)

Save current zoom state to history

pub fn pop_zoom_state(&mut self) -> bool

Restore previous zoom state (zoom out button)

pub fn clear_zoom_history(&mut self)

Clear zoom history

pub fn has_zoom_history(&self) -> bool

Check if there are zoom states to restore

Trait Implementations

impl Clone for ChartState

fn clone(&self) -> ChartState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChartState

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

Formats the value using the given formatter.