Victory is a powerful library that enables the integration of charts and data visualizations into React applications. This article explores how to effectively incorporate charts into your React projects using Victory.
Section 1.1: Utilizing VictorySharedEvents
The VictorySharedEvents component allows you to handle shared events across multiple charts. Here's how you can implement it:
import React from "react";
import {
VictoryBar,
VictoryLabel,
VictoryPie,
VictorySharedEvents
} from "victory";
export default function App() {
return (
<svg viewBox="0 0 450 350">
<VictorySharedEvents
events={[
{
childName: ["pie", "bar"],
target: "data",
eventHandlers: {
onMouseOver: () => {
return [
{
childName: ["pie", "bar"],
mutation: (props) => {
return {
style: Object.assign({}, props.style, {
fill: "tomato"
})
};
}
}
];
},
onMouseOut: () => {
return [
{
childName: ["pie", "bar"],
mutation: () => {
return null;
}
}
];
}
}
}
]}
>
<g transform={"translate(150, 50)"}>
<VictoryBar
name="bar"
width={300}
standalone={false}
style={{
data: { width: 20 },
labels: { fontSize: 25 }
}}
data={[
{ x: "a", y: 2 },
{ x: "b", y: 3 },
{ x: "c", y: 5 }
]}
labels={["a", "b", "c"]}
labelComponent={<VictoryLabel y={290} />}
/>
</g>
<g transform={"translate(0, -75)"}>
<VictoryPie
name="pie"
width={250}
standalone={false}
style={{ labels: { fontSize: 25, padding: 10 } }}
data={[
{ x: "a", y: 1 },
{ x: "b", y: 4 },
{ x: "c", y: 5 }
]}
/>
</g>
</VictorySharedEvents>
</svg>
);
}
In the events property, you can define an array containing the eventHandlers object to manage various events. The onMouseOver and onMouseOut handlers allow you to modify the style of the hovered segments. The childName attribute specifies which charts to affect, while onMouseOut resets the style back to its original state.
Subsection 1.1.1: Handling External Event Mutations
You can also manage event mutations by updating states. Below is an example:
import React, { useState } from "react";
import { VictoryBar, VictoryChart } from "victory";
const buttonStyle = {
backgroundColor: "black",
color: "white",
padding: "10px",
marginTop: "10px"
};
export default function App() {
const [externalMutations, setExternalMutations] = useState({});
const removeMutation = () => {
setExternalMutations(undefined);
};
const clearClicks = () => {
setExternalMutations([
{
childName: "Bar-1",
target: ["data"],
eventKey: "all",
mutation: () => ({ style: undefined }),
callback: removeMutation
}
]);
};
return (
<div>
<button onClick={clearClicks} style={buttonStyle}>
Reset
</button>
<VictoryChart
domain={{ x: [0, 5] }}
externalEventMutations={externalMutations}
events={[
{
target: "data",
childName: "Bar-1",
eventHandlers: {
onClick: () => ({
target: "data",
mutation: () => ({ style: { fill: "orange" } })
})
}
}
]}
>
<VictoryBar
name="Bar-1"
style={{ data: { fill: "grey" } }}
labels={() => "click me!"}
data={[
{ x: 1, y: 2 },
{ x: 2, y: 4 },
{ x: 3, y: 1 },
{ x: 4, y: 5 }
]}
/>
</VictoryChart>
</div>
);
}
In this example, clicking on the bars changes their fill color to orange. The Reset button clears all click handlers by setting externalMutations to undefined, effectively removing all styles from the bars.