Struct PieChart

pub struct PieChart {
    pub title: String,
    pub datasets: Vec<(String, f64, [u8; 3])>,
    pub config: FigureConfig,
}

Represents a pie chart with title, datasets, and configuration settings.

Fields

title: String

Title of the pie chart.

datasets: Vec<(String, f64, [u8; 3])>

A collection of datasets, where each dataset contains:

• A label (String).
• A value (f64).
• A color in RGB format ([u8; 3]).

config: FigureConfig

Configuration settings for rendering the chart (e.g., fonts, colors, grid).

Implementations

impl PieChart

pub fn new(title: &str, config: FigureConfig) -> Self

Creates a new PieChart instance with the specified title and configuration.

Parameters

• title: The title of the pie chart.
• config: The FigureConfig containing appearance and behavior settings.

Returns

A new PieChart instance with no datasets.

Example

use crate::figure::configuration::figureconfig::FigureConfig;
use crate::figure::piechart::PieChart;

let config = FigureConfig::default();
let pie_chart = PieChart::new("Market Share", config);

pub fn add_slice(&mut self, label: &str, value: f64, color: [u8; 3])

Adds a slice to the pie chart.

Parameters

• label: The label for the slice.
• value: The value representing the proportion of the slice.
• color: The RGB color of the slice.

Example

pie_chart.add_slice("Product A", 30.0, [255, 0, 0]);
pie_chart.add_slice("Product B", 50.0, [0, 255, 0]);
pie_chart.add_slice("Product C", 20.0, [0, 0, 255]);

pub fn draw_slice( &self, canvas: &mut PixelCanvas, center_x: i32, center_y: i32, radius: i32, start_angle: f64, end_angle: f64, color: [u8; 3], )

Draws a slice of the pie chart on the canvas.

Parameters

• canvas: The PixelCanvas to draw the slice on.
• center_x: The x-coordinate of the center of the pie chart.
• center_y: The y-coordinate of the center of the pie chart.
• radius: The radius of the pie chart.
• start_angle: The starting angle of the slice in radians.
• end_angle: The ending angle of the slice in radians.
• color: The RGB color of the slice.

Details

This method fills a portion of the circle defined by start_angle and end_angle. It ensures that only points within the slice and the circle are drawn.

Example

pie_chart.draw_slice(&mut canvas, 200, 200, 100, 0.0, 1.0, [255, 0, 0]);

Trait Implementations

impl Drawer for PieChart

fn draw_svg(&mut self, svg_canvas: &mut SvgCanvas)

Draws the plot content on an SvgCanvas.

fn draw(&mut self, canvas: &mut PixelCanvas)

Draws the main content of the plot on a PixelCanvas.

fn draw_legend(&self, canvas: &mut PixelCanvas)

Draws the legend for the plot on a PixelCanvas.

fn draw_grid(&self, canvas: &mut PixelCanvas, config: &FigureConfig)

Draws the grid for the plot based on the provided configuration.

fn draw_axis( &self, canvas: &mut PixelCanvas, config: &FigureConfig, x1: i32, y1: i32, x2: i32, y2: i32, )

Draws an axis line on the canvas.

fn draw_label( &self, canvas: &mut PixelCanvas, config: &FigureConfig, x: u32, y: u32, text: &str, )

Draws a text label on the canvas.

fn draw_title( &self, canvas: &mut PixelCanvas, config: &FigureConfig, x: u32, y: u32, text: &str, )

Draws the plot title on the canvas.

fn draw_axis_value( &self, canvas: &mut PixelCanvas, config: &FigureConfig, x: u32, y: u32, text: &str, axis: AxisType, )

Draws a value on the axis (tick label) based on its type.

impl Hover for PieChart

fn find_closest_point( &self, mouse_x: u32, mouse_y: u32, canvas: &PixelCanvas, ) -> Option<((f64, f64), f64)>

Finds the closest point to the mouse position on the plot.

fn to_canvas_coordinates( &self, x: f64, y: f64, _canvas: &PixelCanvas, ) -> (u32, u32)

Converts plot coordinates into canvas pixel coordinates.

fn handle_hover( &self, mouse_x: u32, mouse_y: u32, canvas: &PixelCanvas, ) -> Option<Vec<u32>>

Handles hover functionality and returns an updated buffer if applicable.

fn get_font<'a>(&self, font_data: &'a [u8]) -> FontRef<'a>

Retrieves the font used for hover text rendering.