126 lines
3.4 KiB
TypeScript
126 lines
3.4 KiB
TypeScript
import { ClosureComponent, Component, Children } from "mithril";
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import { m } from "./components";
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import { stringify } from "../lib/common/expression-parser";
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import memoize from "../lib/common/memoize";
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const memoizedStringify = memoize(stringify);
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function drawChart(chartData): Children {
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const slices = chartData.slices;
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const total: number = Array.from(Object.values(chartData.slices)).reduce(
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(a: number, s) => a + (s["count"]["value"] || 0),
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0
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);
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const legend = [];
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const paths = [];
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const links = [];
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let currentProgressPercentage = 0;
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let startX = Math.cos(2 * Math.PI * currentProgressPercentage) * 100;
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let startY = Math.sin(2 * Math.PI * currentProgressPercentage) * 100;
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let endX, endY;
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for (const slice of Object.values(slices)) {
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const percent = total > 0 ? (slice["count"]["value"] || 0) / total : 0;
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legend.push(
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m(".legend-line", [
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m("span.color", {
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style: `background-color: ${slice["color"]} !important;`
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}),
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`${slice["label"]}: `,
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m(
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"a",
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{
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href: `/#!/devices/?${m.buildQueryString({
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filter: memoizedStringify(slice["filter"])
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})}`
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},
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slice["count"]["value"] || 0
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),
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` (${(percent * 100).toFixed(2)}%)`
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])
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);
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if (percent > 0) {
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currentProgressPercentage += percent;
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endX = Math.cos(2 * Math.PI * currentProgressPercentage) * 100;
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endY = Math.sin(2 * Math.PI * currentProgressPercentage) * 100;
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const isBigArc = percent > 0.5 ? 1 : 0;
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const sketch =
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`M ${startX} ${startY} ` + // Move to the starting point
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`A 100 100 0 ${isBigArc} 1 ${endX} ${endY} ` + // Draw an Arc from starting point to ending point
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`L 0 0 z`; // complete the shape by drawing a line to the center of circle
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startX = endX;
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startY = endY;
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paths.push(
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m("path", {
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d: sketch,
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fill: slice["color"]
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})
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);
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const percentageX =
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Math.cos(2 * Math.PI * (currentProgressPercentage - percent / 2)) * 50;
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const percentageY =
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Math.sin(2 * Math.PI * (currentProgressPercentage - percent / 2)) * 50;
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links.push(
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m(
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"a",
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{
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"xlink:href": `/#!/devices/?${m.buildQueryString({
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filter: memoizedStringify(slice["filter"])
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})}`
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},
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[
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m("path", {
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d: sketch,
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"fill-opacity": 0
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}),
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m(
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"text",
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{
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x: percentageX,
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y: percentageY,
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"dominant-baseline": "middle",
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"text-anchor": "middle"
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},
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`${(percent * 100).toFixed(2)}%`
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)
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]
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)
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);
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}
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}
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legend.push(m("span.legend-total", `Total: ${total}`));
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return m("div", { class: "pie-chart" }, [
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m(
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"svg",
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{
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// Adding 2 as padding; strokes must not be more than 2
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viewBox: "-102 -102 204 204",
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width: "204px",
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height: "204px",
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xmlns: "http://www.w3.org/2000/svg",
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"xmlns:xlink": "http://www.w3.org/1999/xlink"
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},
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paths.concat(links)
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),
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m(".legend", legend)
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]);
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}
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const component: ClosureComponent = (): Component => {
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return {
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view: vnode => {
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return drawChart(vnode.attrs["chart"]);
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}
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};
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};
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export default component;
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