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line chart shadow option #561

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line chart shadow option #561

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3 changes: 3 additions & 0 deletions src/HelperTypes.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,9 @@ export interface Dataset {
/** A function returning array of the colors of the stroke given an input opacity value for each data value. */
colors?: Array<(opacity: number) => string>;

/** A function returning the color of the shadow given an input opacity value. */
shadowColor?:(opacity: number) => string;

/** The width of the stroke. Defaults to 2. */
strokeWidth?: number;

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12 changes: 6 additions & 6 deletions src/line-chart/LineChart.tsx
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Expand Up @@ -231,6 +231,10 @@ class LineChart extends AbstractChart<LineChartProps, LineChartState> {
return (dataset.color || this.props.chartConfig.color)(opacity);
};

getShadowColor = (dataset: Dataset, opacity: number) => {
return (dataset.shadowColor || dataset.color || this.props.chartConfig.color)(opacity);
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I feel like it should default to url(#fillShadowGradient..., to make this change backwards compatible

};

getStrokeWidth = (dataset: Dataset) => {
return dataset.strokeWidth || this.props.chartConfig.strokeWidth || 3;
};
Expand Down Expand Up @@ -584,9 +588,7 @@ class LineChart extends AbstractChart<LineChartProps, LineChartState> {
(dataset.data.length - 1)},${(height / 4) * 3 +
paddingTop} ${paddingRight},${(height / 4) * 3 + paddingTop}`
}
fill={`url(#fillShadowGradient${
useColorFromDataset ? `_${index}` : ""
})`}
fill={this.getShadowColor(dataset, 0.2)}
strokeWidth={0}
/>
);
Expand Down Expand Up @@ -761,9 +763,7 @@ class LineChart extends AbstractChart<LineChartProps, LineChartState> {
<Path
key={index}
d={d}
fill={`url(#fillShadowGradient${
useColorFromDataset ? `_${index}` : ""
})`}
fill={this.getShadowColor(dataset, 0.2)}
strokeWidth={0}
/>
);
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