Struct ChartOptions 

pub struct ChartOptions {

    pub chart_type: ChartType,
    pub x_column: Option<String>,
    pub y_column: Option<String>,
    pub series_column: Option<String>,
    pub title: Option<String>,
    pub format: ChartFormat,
    pub width: u32,
    pub height: u32,
    pub bins: u32,
    pub x_as_category: Option<bool>,
    pub x_range: Option<[f64; 2]>,
    pub y_range: Option<[f64; 2]>,
    pub color_map: HashMap<String, RGBColor>,
    pub label_points: bool,
}

User-facing chart configuration, parsed from MCP tool parameters.

Fields

chart_type: ChartType

x_column: Option<String>

y_column: Option<String>

series_column: Option<String>

title: Option<String>

format: ChartFormat

width: u32

height: u32

bins: u32

x_as_category: Option<bool>

Override the chart-type-specific default for how the x column is interpreted:

• None (default): use the chart type’s natural behavior — Bar treats x as categorical, Line / Scatter require numeric x.
• Some(true): force categorical even on Line / Scatter. Essential for plotting values whose natural axis is a string / date / enum (e.g. SELECT day, happiness_score where day is a DATE).
• Some(false): force numeric even on Bar (rarely useful — bar charts are almost always categorical).

When categorical mode is active the rendered x axis uses the original string representation of each distinct x value as its tick label, in the order x values are first seen.

x_range: Option<[f64; 2]>

Fix the x-axis range as [min, max]. When set, auto-scaling is skipped and all frames/charts share the same x extent. Useful for side-by-side comparisons or animation where a consistent scale matters. Ignored for bar charts (which use categorical positions).

y_range: Option<[f64; 2]>

Fix the y-axis range as [min, max]. Same semantics as x_range.

color_map: HashMap<String, RGBColor>

Map series names to hex colors ("#rrggbb"). Entries that match a series name override the default palette; unmatched series still cycle through palette colors. Only affects charts with a series column; single-series charts use the first palette color as before.

label_points: bool

When true, draw the series name as a text label next to each dot on scatter (and each point on line) charts, and suppress the legend entirely. Useful when each series has exactly one point (e.g. one country per dot) and a legend would be redundant.

Labels are drawn 6 pixels right and 4 pixels above the data point. No collision avoidance is performed — for dense data the legend (label_points: false, the default) is usually more readable.

Trait Implementations

impl Clone for ChartOptions

fn clone(&self) -> ChartOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChartOptions

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

Formats the value using the given formatter.

impl Default for ChartOptions

fn default() -> Self

Returns the “default value” for a type.