Function binnableColorScale

packages/sanddance-specs/src/scales.ts:52–97

(scaleName: string, colorBin: ColorBin, data: string, field: string, scheme?: string)

}

export function binnableColorScale(scaleName: string, colorBin: ColorBin, data: string, field: string, scheme?: string) {
    scheme = scheme || ColorScaleNone;
    const domain: ScaleData = {
        data,
        field: safeFieldName(field),
    };
    const range: RangeScheme = {
        scheme,
    };
    const reverse: SignalRef = { signal: SignalNames.ColorReverse };
    if (colorBin !== 'continuous') {
        range.count = { signal: SignalNames.ColorBinCount };
    }
    switch (colorBin) {
        case 'continuous': {
            const sequentialScale: LinearScale = {
                name: scaleName,
                type: 'linear',
                domain,
                range,
                reverse,
            };
            return sequentialScale;
        }
        case 'quantile': {
            const quantileScale: QuantileScale = {
                name: scaleName,
                type: 'quantile',
                domain,
                range,
                reverse,
            };
            return quantileScale;
        }
        default: {
            const quantizeScale: QuantizeScale = {
                name: scaleName,
                type: 'quantize',
                domain,
                range,
                reverse,
            };
            return quantizeScale;
        }
    }
}