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[docs] Add example for custom legend #16169

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111 changes: 111 additions & 0 deletions docs/data/charts/legend/CustomLegend.js
Original file line number Diff line number Diff line change
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import * as React from 'react';
import Box from '@mui/material/Box';
import Stack from '@mui/material/Stack';
import Typography from '@mui/material/Typography';
import { useTheme } from '@mui/material/styles';
import { useLegend } from '@mui/x-charts/hooks';
import { LineChart } from '@mui/x-charts/LineChart';

function LineWithMark({ color, size }) {
return (
<svg
viewBox="0 0 24 24"
width={size}
height={size}
stroke={color}
strokeWidth={3}
strokeLinecap="round"
fill="none"
>
<path d="M 1 12.5 L 7 12.5 M 17 12.5 L 23 12.5" />
<circle cx={12} cy={12.5} r={5} />
</svg>
);
}

function DashedLine({ color, size }) {
return (
<svg
viewBox="0 0 24 24"
width={size}
height={size}
stroke={color}
strokeWidth={3}
fill="none"
>
<path d="M 1 12.5 L 23 12.5" strokeDasharray="5 3" />
</svg>
);
}

function MyCustomLegend() {
const { items } = useLegend();
return (
<Stack direction="row" gap={3}>
{items.map((item) => {
const { label, id, color, seriesId } = item;
return (
<Box key={id} sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
{seriesId === 'avg' ? (
<DashedLine color={color} size={20} />
) : (
<LineWithMark color={color} size={20} />
)}
<Typography sx={{ display: 'inline-block' }}>{`${label}`}</Typography>
</Box>
);
})}
</Stack>
);
}

const dataset = [
{ month: 'Jan', '1991_2020_avg': 4.1, 2023: 3.9 },
{ month: 'Fev', '1991_2020_avg': 4.7, 2023: 8.9 },
{ month: 'Mar', '1991_2020_avg': 7.5, 2023: 9.5 },
{ month: 'Apr', '1991_2020_avg': 10.6, 2023: 11.5 },
{ month: 'May', '1991_2020_avg': 13.8, 2023: 15.5 },
{ month: 'Jun', '1991_2020_avg': 16.7, 2023: 16.4 },
{ month: 'Jul', '1991_2020_avg': 18.9, 2023: 19.5 },
{ month: 'Aug', '1991_2020_avg': 18.8, 2023: 20.5 },
{ month: 'Sep', '1991_2020_avg': 15.8, 2023: 16.4 },
{ month: 'Oct', '1991_2020_avg': 11.9, 2023: 13.2 },
{ month: 'Nov', '1991_2020_avg': 7.6, 2023: 8.1 },
{ month: 'Dec', '1991_2020_avg': 4.7, 2023: 6.1 },
];

export default function CustomLegend() {
const theme = useTheme();

return (
<Box
sx={{ height: 300, width: '100%', display: 'flex', flexDirection: 'column' }}
>
<LineChart
dataset={dataset}
series={[
{
id: 'avg',
label: 'temp. avg. 1991-2020 (°C)',
dataKey: '1991_2020_avg',
showMark: false,
color: theme.palette.text.primary,
},
{
id: '2023-temp',
label: 'temp. 2023 (°C)',
dataKey: '2023',
color: theme.palette.primary.main,
},
]}
xAxis={[{ dataKey: 'month', scaleType: 'band', id: 'x-axis' }]}
sx={{
[`& .MuiLineElement-series-avg`]: {
strokeDasharray: '10 5',
},
}}
slots={{ legend: MyCustomLegend }}
/>
</Box>
);
}
116 changes: 116 additions & 0 deletions docs/data/charts/legend/CustomLegend.tsx
Original file line number Diff line number Diff line change
@@ -0,0 +1,116 @@
import * as React from 'react';
import Box from '@mui/material/Box';
import Stack from '@mui/material/Stack';
import Typography from '@mui/material/Typography';
import { useTheme } from '@mui/material/styles';
import { useLegend } from '@mui/x-charts/hooks';
import { LineChart } from '@mui/x-charts/LineChart';

type IconProps = {
color: string;
size: number;
};

function LineWithMark({ color, size }: IconProps) {
return (
<svg
viewBox="0 0 24 24"
width={size}
height={size}
stroke={color}
strokeWidth={3}
strokeLinecap="round"
fill="none"
>
<path d="M 1 12.5 L 7 12.5 M 17 12.5 L 23 12.5" />
<circle cx={12} cy={12.5} r={5} />
</svg>
);
}

function DashedLine({ color, size }: IconProps) {
return (
<svg
viewBox="0 0 24 24"
width={size}
height={size}
stroke={color}
strokeWidth={3}
fill="none"
>
<path d="M 1 12.5 L 23 12.5" strokeDasharray="5 3" />
</svg>
);
}

function MyCustomLegend() {
const { items } = useLegend();
return (
<Stack direction="row" gap={3}>
{items.map((item) => {
const { label, id, color, seriesId } = item;
return (
<Box key={id} sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
{seriesId === 'avg' ? (
<DashedLine color={color} size={20} />
) : (
<LineWithMark color={color} size={20} />
)}
<Typography sx={{ display: 'inline-block' }}>{`${label}`}</Typography>
</Box>
);
})}
</Stack>
);
}

const dataset = [
{ month: 'Jan', '1991_2020_avg': 4.1, 2023: 3.9 },
{ month: 'Fev', '1991_2020_avg': 4.7, 2023: 8.9 },
{ month: 'Mar', '1991_2020_avg': 7.5, 2023: 9.5 },
{ month: 'Apr', '1991_2020_avg': 10.6, 2023: 11.5 },
{ month: 'May', '1991_2020_avg': 13.8, 2023: 15.5 },
{ month: 'Jun', '1991_2020_avg': 16.7, 2023: 16.4 },
{ month: 'Jul', '1991_2020_avg': 18.9, 2023: 19.5 },
{ month: 'Aug', '1991_2020_avg': 18.8, 2023: 20.5 },
{ month: 'Sep', '1991_2020_avg': 15.8, 2023: 16.4 },
{ month: 'Oct', '1991_2020_avg': 11.9, 2023: 13.2 },
{ month: 'Nov', '1991_2020_avg': 7.6, 2023: 8.1 },
{ month: 'Dec', '1991_2020_avg': 4.7, 2023: 6.1 },
];

export default function CustomLegend() {
const theme = useTheme();

return (
<Box
sx={{ height: 300, width: '100%', display: 'flex', flexDirection: 'column' }}
>
<LineChart
dataset={dataset}
series={[
{
id: 'avg',
label: 'temp. avg. 1991-2020 (°C)',
dataKey: '1991_2020_avg',
showMark: false,
color: theme.palette.text.primary,
},
{
id: '2023-temp',
label: 'temp. 2023 (°C)',
dataKey: '2023',
color: theme.palette.primary.main,
},
]}
xAxis={[{ dataKey: 'month', scaleType: 'band', id: 'x-axis' }]}
sx={{
[`& .MuiLineElement-series-avg`]: {
strokeDasharray: '10 5',
},
}}
slots={{ legend: MyCustomLegend }}
/>
</Box>
);
}
13 changes: 11 additions & 2 deletions docs/data/charts/legend/legend.md
Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,6 @@ In chart components, the legend links series with `label` properties and their c

This section explains how to customize the legend using classes and properties.

In order to fully customize the legend with custom components, see an example at the [HTML components docs](/x/react-charts/components/#html-components).

### Dimensions

Much of the customization can be done using CSS properties.
Expand Down Expand Up @@ -80,6 +78,17 @@ Make sure that the legend container has a fixed height or width to enable scroll

{{"demo": "ScrollableLegend.js"}}

### Custom component

For advanced customization, you can create your own legend with `useLegend`.
This hook returns the items that the default legend would plot.
Allowing you to focus on the rendering.

This demo show how to use it with slots.
Another demo in [HTML components docs](/x/react-charts/components/#html-components) shows how to use it with composition.

{{"demo": "CustomLegend.js"}}

## Color legend

To display legend associated to a [colorMap](https://mui.com/x/react-charts/styling/#values-color), you can use:
Expand Down
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