When the slider ranges from -10 to 0, I want it to display in red. For values between 0 and +10, I would like it to be shown in green.
Is there a way to implement this color change using the <Slider /> component from @material-ui/core?
When the slider ranges from -10 to 0, I want it to display in red. For values between 0 and +10, I would like it to be shown in green.
Is there a way to implement this color change using the <Slider /> component from @material-ui/core?
Uncertain about whether you were referring to the rail or track element of the Slider, I've included styles for both below. It's simply a matter of targeting the appropriate classes made available by the Material-UI API. For a comprehensive list of the Slider element's classes, refer to the documentation here.
The background of the rail can be customized with a linear-gradient image created using CSS, and the track itself can be conditionally styled by providing a prop to the makeStyles function:
import React from "react";
import Slider from "@material-ui/core/Slider";
import { makeStyles } from "@material-ui/core/styles";
const useStyles = makeStyles({
rail: {
background: "linear-gradient(90deg, red 50%, green 50%)"
},
track: {
background: ({ value }) => (value >= 0 ? "green" : "red")
}
});
const marks = Array.from({ length: 21 }, (_, i) => ({
value: i - 10,
label: i - 10
}));
const App = () => {
const [value, setValue] = React.useState(0);
const classes = useStyles({ value });
return (
<Slider
onChange={(e, newValue) => setValue(newValue)}
max={10}
min={-10}
value={value}
classes={classes}
marks={marks}
step={1}
/>
);
};
export default App;
In line with your suggestion, you can also pass the value prop to the rail and style it based on conditions. The need to style the left side of the rail gray is eliminated as it will continuously be obscured by the track in that scenario:
rail: {
background: ({ value }) =>
`linear-gradient(90deg, red 50%, ${value < 0 ? "gray" : "green"} 50%)`
},
If not required, consider excluding the track element entirely and increase the opacity of the rail while addressing the two distinct sides through conditional statements:
rail: {
opacity: 0.7,
background: ({ value }) => {
const left = value < 0 ? "red" : "gray";
const right = value < 0 ? "gray" : "green";
return `linear-gradient(90deg, ${left} 50%, ${right} 50%)`;
}
},
track: {
display: "none",
}
Visit this link to view the code sample
import React, { useState } from "react";
import { Box, Typography, Slider } from "@mui/material";
function CustomizeSlider(props) {
const {
title,
reverse,
values,
min,
max,
thresholdMarks,
thresholdTitles,
style,
...rest
} = props;
const [value, setValue] = useState(
reverse ? values.map((val) => -val) : values
);
const [marks, setMarks] = useState(
reverse ? thresholdMarks.map((val) => -val) : thresholdMarks
);
const [perc, setPerc] = useState(
reverse
? values.map((val) => parseInt((1 - Math.abs(val / max)) * 100))
: values.map((val) => (val / max) * 100)
);
const onChange = (e, tValues) => {
const [minVal, maxVal] = tValues;
if (maxVal > minVal && maxVal !== minVal) {
setValue(tValues);
if (!reverse) {
setMarks([
parseInt((min + minVal) / 2, 10),
parseInt((minVal + maxVal) / 2, 10),
parseInt((maxVal + max) / 2, 10),
]);
setPerc(tValues.map((val) => (val / max) * 100));
} else {
setMarks([
parseInt((-max + minVal) / 2, 10),
parseInt((minVal + maxVal) / 2, 10),
parseInt((maxVal + -min) / 2, 10),
]);
setPerc(
tValues.map((val) => parseInt((1 - Math.abs(val / max)) * 100))
);
}
}
};
console.log(value, perc, marks);
return (
<Box
sx={{
width: "80%",
margin: "16px",
}}
>
<Typography
id="custom-slider"
gutterBottom
sx={{
marginBottom: "40px",
}}
>
{title}
</Typography>
<Slider
sx={{
"& .MuiSlider-track": {
background: "#47D7AC",
borderColor: "#47D7AC",
},
// Other styles...
}}
valueLabelDisplay="on"
valueLabelFormat={(x) => `< ${x}`}
{/* Additional slider properties */}
{...rest}
/>
</Box>
);
}
export default function CustomSliderComponent() {
return (
<Box>
<CustomizeSlider
title="Reverse custom range"
reverse={true}
step={1}
values={[10.0, 4.0]}
min={0}
max={24}
thresholdMarks={[17, 7, 2]}
thresholdTitles={["R", "Y", "G"]}
/>
<CustomizeSlider
title="Normal range"
reverse={false}
step={1}
values={[4, 5, 7]}
min={0}
max={10}
thresholdMarks={[3, 5, 8]}
thresholdTitles={["R", "Y", "G"]}
/>
</Box>
);
}
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