Struct ChartState 

pub struct ChartState { /* private fields */ }

Minimal mutable state shared between render frames in interactive mode. The goal is not to be a full chart implementation – the existing Chart struct already handles that. Instead this type acts as a convenient scratch-pad that front-ends can own and mutate while delegating heavy work to Chart.

Note: Data management is the responsibility of the frontend. This state only tracks interaction state (pan, zoom, etc.).

Implementations

impl ChartState

pub fn new() -> Self

pub fn handle_event(&mut self, ev: ChartEvent)

Front-ends call this whenever an interaction happens.

pub fn check_needs_redraw(&mut self) -> bool

True if something changed since the last time the flag was queried.

pub fn take_pan(&mut self) -> (f32, f32)

Get accumulated pan delta and reset it.

pub fn zoom(&self) -> (f32, f32, f32)

Get zoom state.

pub fn reset_zoom(&mut self)

Reset zoom factor to 1.0.

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 Default for ChartState

fn default() -> Self

Returns the “default value” for a type.