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Update chartjs-plugin-trendlines.ts

This commit is contained in:
Nate Kelley 2025-05-12 12:59:50 -06:00
parent 23366be551
commit 4de509f2e2
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1 changed files with 33 additions and 23 deletions
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56
web/src/components/ui/charts/BusterChartJS/core/plugins/chartjs-plugin-trendlines.ts
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@ -75,7 +75,7 @@ declare module 'chart.js' {
}
interface ChartDatasetProperties<TType extends ChartType, TData> {
trendline?: TrendlineOptions;
trendline?: TrendlineOptions[];
}
}
@ -654,38 +654,48 @@ const trendlinePlugin: Plugin<'line'> = {
// Original behavior - draw individual trendlines for each dataset
chart.data.datasets.forEach((dataset, datasetIndex) => {
const opts = dataset.trendline;
if (!opts || dataset.data.length < 2) {
const trendlineOptions = dataset.trendline;
if (!trendlineOptions || dataset.data.length < 2) {
return;
}
// Create the appropriate fitter
const fitter = createFitter(opts);
// Convert to array if it's a single object for backward compatibility
const trendlineArray = Array.isArray(trendlineOptions)
? trendlineOptions
: [trendlineOptions];
// Add all data points to the fitter
addDataPointsToFitter(dataset, fitter);
// Process each trendline option
trendlineArray.forEach((opts) => {
if (!opts || !opts.type) return;
// Skip if no valid points were added
if (fitter.minx === Infinity || fitter.maxx === -Infinity) {
return;
}
// Create the appropriate fitter
const fitter = createFitter(opts);
// For exponential trendlines, ensure we have valid y values
if (opts.type === 'exponential') {
// Check if we have valid data (positive y values)
const hasValidPoints = dataset.data.some((point: any) => {
const y = point[dataset.yAxisID ?? 'y'] ?? point;
return typeof y === 'number' && y > 0;
});
// Add all data points to the fitter
addDataPointsToFitter(dataset, fitter);
if (!hasValidPoints) {
console.warn('Exponential trendline requires positive y values');
// Skip if no valid points were added
if (fitter.minx === Infinity || fitter.maxx === -Infinity) {
return;
}
}
const defaultColor = (dataset.borderColor as string) ?? 'rgba(0,0,0,0.3)';
drawTrendline(ctx, chartArea, xScale, yScale, fitter, opts, defaultColor);
// For exponential trendlines, ensure we have valid y values
if (opts.type === 'exponential') {
// Check if we have valid data (positive y values)
const hasValidPoints = dataset.data.some((point: any) => {
const y = point[dataset.yAxisID ?? 'y'] ?? point;
return typeof y === 'number' && y > 0;
});
if (!hasValidPoints) {
console.warn('Exponential trendline requires positive y values');
return;
}
}
const defaultColor = (dataset.borderColor as string) ?? 'rgba(0,0,0,0.3)';
drawTrendline(ctx, chartArea, xScale, yScale, fitter, opts, defaultColor);
});
});
}
};