{
G2.register("shape.interval.myInterval", myInterval);
const chart = new G2.Chart({
paddingLeft: 60,
paddingRight: 60,
width: 800,
height: 500
});
chart
.interval()
.data(DATA)
.encode("x", "year")
.encode("y", "sales")
.style("shape", "myInterval")
.scale("x", { padding: 0.3 });
chart.line().data(DATA).encode("x", "year").encode("y", "sales").style({
stroke: "rgb(136, 240, 255)",
lineWidth: 2
});
chart.point().data(DATA).encode("x", "year").encode("y", "sales").style({
stroke: "rgb(141, 150, 160,0.5)",
lineWidth: 2,
fill: "rgb(136, 240, 255)"
});
chart.legend("year", {
width: 10
});
chart.interaction("tooltip");
await chart.render();
return chart.getContainer();
}
DATA = [
{ year: "1951 年", sales: 38 },
{ year: "1952 年", sales: 52 },
{ year: "1956 年", sales: 61 },
{ year: "1957 年", sales: 145 },
{ year: "1958 年", sales: 48 },
{ year: "1959 年", sales: 38 },
{ year: "1960 年", sales: 38 },
{ year: "1962 年", sales: 38 },
{ year: "1963 年", sales: 65 },
{ year: "1964 年", sales: 122 },
{ year: "1967 年", sales: 132 },
{ year: "1968 年", sales: 144 }
]
function myInterval(o, context) {
return (points, size) => {
const x3 = points[1][0] - points[0][0];
const x4 = x3 / 2 + points[0][0];
const { document } = context;
const g = document.createElement("g", {});
const r = document.createElement("polygon", {
style: {
points: [
[points[0][0], points[0][1]],
[x4, points[1][1] + 8],
[x4, points[3][1] + 8],
[points[3][0], points[3][1]]
],
fill: "rgba(114, 177, 207, 0.5)",
stroke: "rgba(0,0,0,0.1)",
strokeOpacity: 0.1,
inset: 30
}
});
const p = document.createElement("polygon", {
style: {
points: [
[x4, points[1][1] + 8],
[points[1][0], points[1][1]],
[points[2][0], points[2][1]],
[x4, points[2][1] + 8]
],
fill: "rgba(126, 212, 236, 0.5)",
stroke: "rgba(0,0,0,0.3)",
strokeOpacity: 0.1
}
});
const t = document.createElement("polygon", {
style: {
points: [
[points[0][0], points[0][1]],
[x4, points[1][1] - 8],
[points[1][0], points[1][1]],
[x4, points[1][1] + 8]
],
fill: "rgba(173, 240, 255, 0.65)"
}
});
g.appendChild(r);
g.appendChild(p);
g.appendChild(t);
return g;
};
}
G2 = require("https://unpkg.com/@antv/g2")
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