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| import * as React from "react"; | |
| import { ChartRenderer } from "./ChartRenderer"; | |
| export const Bars = () => { | |
| // These specs were copy/pasted from the Bar Chart example | |
| // from the Vega Documentation | |
| // https://vega.github.io/vega/examples/bar-chart/ | |
| const spec = { | |
| $schema: "https://vega.github.io/schema/vega/v5.json", | |
| width: 400, | |
| height: 200, | |
| padding: 5, | |
| data: [ | |
| { | |
| name: "table", | |
| values: [ | |
| { category: "A", amount: 28 }, | |
| { category: "B", amount: 55 }, | |
| { category: "C", amount: 43 }, | |
| { category: "D", amount: 91 }, | |
| { category: "E", amount: 81 }, | |
| { category: "F", amount: 53 }, | |
| { category: "G", amount: 19 }, | |
| { category: "H", amount: 87 } | |
| ] | |
| } | |
| ], | |
| signals: [ | |
| { | |
| name: "tooltip", | |
| value: {}, | |
| on: [ | |
| { events: "rect:mouseover", update: "datum" }, | |
| { events: "rect:mouseout", update: "{}" } | |
| ] | |
| } | |
| ], | |
| scales: [ | |
| { | |
| name: "xscale", | |
| type: "band", | |
| domain: { data: "table", field: "category" }, | |
| range: "width", | |
| padding: 0.05, | |
| round: true | |
| }, | |
| { | |
| name: "yscale", | |
| domain: { data: "table", field: "amount" }, | |
| nice: true, | |
| range: "height" | |
| } | |
| ], | |
| axes: [ | |
| { orient: "bottom", scale: "xscale" }, | |
| { orient: "left", scale: "yscale" } | |
| ], | |
| marks: [ | |
| { | |
| type: "rect", | |
| from: { data: "table" }, | |
| encode: { | |
| enter: { | |
| x: { scale: "xscale", field: "category" }, | |
| width: { scale: "xscale", band: 1 }, | |
| y: { scale: "yscale", field: "amount" }, | |
| y2: { scale: "yscale", value: 0 } | |
| }, | |
| update: { | |
| fill: { value: "steelblue" } | |
| }, | |
| hover: { | |
| fill: { value: "lightblue" } | |
| } | |
| } | |
| }, | |
| { | |
| type: "text", | |
| encode: { | |
| enter: { | |
| align: { value: "center" }, | |
| baseline: { value: "bottom" }, | |
| fill: { value: "#333" } | |
| }, | |
| update: { | |
| x: { scale: "xscale", signal: "tooltip.category", band: 0.5 }, | |
| y: { scale: "yscale", signal: "tooltip.amount", offset: -2 }, | |
| text: { signal: "tooltip.amount" }, | |
| fillOpacity: [{ test: "datum === tooltip", value: 0 }, { value: 1 }] | |
| } | |
| } | |
| } | |
| ] | |
| }; | |
| // Here we call the ChartRenderer component with our custom specs. | |
| return <ChartRenderer spec={spec} />; | |
| }; |
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