egui-charts 0.2.0

High-performance financial charting engine for egui — candlesticks, 95 drawing tools, 130+ indicators, and a full design-token theme system
Documentation 
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//! Crosshair options for the chart cursor overlay.
//!
//! Controls the crosshair mode (Normal vs Magnet-snap), visual style
//! (Full / Dot / Arrow), line style (Solid / Dashed / Dotted), and colors.

/// Crosshair Options.
///
/// Controls crosshair behavior and appearance.
use crate::tokens::DESIGN_TOKENS;
use egui::Color32;

/// Crosshair mode
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum CrosshairMode {
    /// Normal crosshair (follows mouse exactly)
    #[default]
    Normal,
    /// Magnet crosshair (snaps to nearest OHLC data point)
    Magnet,
}

/// Crosshair visual style
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum CrosshairStyle {
    /// Full crosshair with vertical and horizontal lines (default)
    #[default]
    Full,
    /// Only a dot at the intersection point
    Dot,
    /// No crosshair, just standard arrow cursor
    Arrow,
}

/// Line style for crosshair rendering (Solid, Dashed, Dotted)
#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
pub enum CrosshairLineStyle {
    /// Solid line
    Solid,
    /// Dashed line (default)
    #[default]
    Dashed,
    /// Dotted line
    Dotted,
}

/// Crosshair options
#[derive(Debug, Clone, Copy)]
pub struct CrosshairOptions {
    /// Crosshair mode
    pub mode: CrosshairMode,

    /// Crosshair visual style (Full/Dot/Arrow)
    pub style: CrosshairStyle,

    /// Line style for crosshair (Solid/Dashed/Dotted)
    pub line_style: CrosshairLineStyle,

    /// Show vertical line
    pub vert_line_visible: bool,

    /// Show horizontal line
    pub horz_line_visible: bool,

    /// Vertical line color
    pub vert_line_color: Color32,

    /// Horizontal line color
    pub horz_line_color: Color32,

    /// Vertical line width
    pub vert_line_width: f32,

    /// Horizontal line width
    pub horz_line_width: f32,

    /// Show labels
    pub label_visible: bool,

    /// Label background color
    pub label_background_color: Color32,

    /// Label text color
    pub label_text_color: Color32,
}

impl Default for CrosshairOptions {
    fn default() -> Self {
        Self {
            mode: CrosshairMode::Normal,
            style: CrosshairStyle::Full,
            line_style: CrosshairLineStyle::Dashed,
            vert_line_visible: true,
            horz_line_visible: true,
            vert_line_color: DESIGN_TOKENS.semantic.chart.crosshair_line,
            horz_line_color: DESIGN_TOKENS.semantic.chart.crosshair_line,
            vert_line_width: 1.0,
            horz_line_width: 1.0,
            label_visible: true,
            label_background_color: DESIGN_TOKENS.semantic.extended.chart_crosshair_label_bg,
            label_text_color: DESIGN_TOKENS.semantic.extended.chart_text,
        }
    }
}