react-chartjs-2#ChartData TypeScript Examples
The following examples show how to use
react-chartjs-2#ChartData.
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Example #1
Source File: CompareChart.tsx From SeeQR with MIT License | 5 votes |
getChartData = (
queries: AppState['queries']
): ChartData<Chart.ChartData> => {
/**
* Gets next color from defined pallete.
*/
const getColor = (() => {
let nextColor = 0;
return () => {
// cycle through colors
const color = compareChartColors[nextColor % compareChartColors.length];
nextColor += 1;
return color;
};
})();
const comparedQueries = Object.values(queries);
// unique query labels
const uniqueLabels = [...new Set(comparedQueries.map((query) => `label:${query.label} db:${query.db} group:${query.group}`))];
const labels = [...new Set(comparedQueries.map((query) => query.group))];
// unique dbs in comparison
const comparedDbs = [...new Set(comparedQueries.map((query) => query.db))];
// Algorithm for grouping speeds by group
const groups:object = {};
for (let i = 0; i < uniqueLabels.length; i++) {
if (groups[queries[uniqueLabels[i]].db]) {
groups[queries[uniqueLabels[i]].db].push(uniqueLabels[i]);
} else {
groups[queries[uniqueLabels[i]].db] = [uniqueLabels[i]];
};
};
// array of objects representing each database that is being displayed
const datasets = comparedDbs.map((db) => {
const color = getColor();
return {
label: db,
backgroundColor: color,
borderColor: color,
borderWidth: 1,
// array with values for each group. If group doesn't have a query with a
// given label being compared, set it's value to
data: groups[db].map((label) => getTotalTime(queries[label])),
};
});
return { labels, datasets };
}