Struct NullDataSource

pub struct NullDataSource;

A DataSource that returns no data points.

Implementations

impl NullDataSource

pub fn new() -> NullDataSource

Constructs a new instance of NullDataSource.

Trait Implementations

impl DataSource for NullDataSource

fn get_data(&mut self) -> Result<Vec<Point>>

Return whatever points you have available when this method is called.

fn get_num_values(&self) -> Result<usize>

The number of values that each Point will have.

fn get_colors(&self) -> Result<Vec<Color>>

Return the colors you want to use to display each value of the graph.

impl Debug for NullDataSource

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

Formats the value using the given formatter.