React chartjs-2 - Increase spacing between legend and chart - chart.js

I am using react chartjs 2. I need to increase margin between legend and chart. Here I found many solutions that are not for react or nextjs. That's why I need to solve it with react environment. Please help me.
Here is my code-
import { Box, Typography } from "#mui/material";
import { Line } from 'react-chartjs-2';
import {
Chart as ChartJS,
CategoryScale,
LinearScale,
PointElement,
LineElement,
Title,
Tooltip,
Legend
} from 'chart.js';
ChartJS.register(
CategoryScale,
LinearScale,
PointElement,
LineElement,
Title,
Tooltip,
Legend
);
const options = {
responsive: true,
plugins: {
legend: {
labels: {
boxHeight: 2,
boxWidth: 50
},
},
}
};
const data = {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [
{
id: 1,
label: 'iPhone',
data: [65, 59, 80, 81, 56, 55, 40],
}
]
};
const DownloadChart = () => {
return (
<Box>
<Typography variant="h5" component="h5">
Device Download
</Typography>
<Line
datasetIdKey='id'
data={data}
options={options}
/>
</Box>
);
};
export default DownloadChart;
I see that there are available beforeInit and afterInit function. But I am not knowing that How can I apply it. Please help me.

You can use a custom plugin:
ChartJS.register({
id: 'customSpacingLegend',
beforeInit(chart) {
// Get reference to the original fit function
const originalFit = chart.legend.fit;
// Override the fit function
chart.legend.fit = function fit() {
// Call original function and bind scope in order to use `this` correctly inside it
originalFit.bind(chart.legend)();
// Change the height as suggested in another answers
this.height += 15;
}
};
});

Related

Svelte and chartjs, pass data

I'm trying to create a chart with chart.js and svelte. I call the data in 3 ways and only one works and it's not the one I'm interested in.
In test 1 I have the data in an external js and it works. (data)
In test 2 I put the same array in the svelte file and it doesn't work. (data2)
In test 3 I take the data from an api and configure the array to have the same format as the previous ones. It doesn't work (data_chart)
I need to make the 3rd option work. Any idea why it doesn't like it?
<script>
import { page } from '$app/stores';
import { onMount } from 'svelte';
import { data } from './data.js';
import { Line } from 'svelte-chartjs'
import { Chart as ChartJS, Title, Tooltip, Legend, LineElement, LinearScale, PointElement, CategoryScale } from 'chart.js';
ChartJS.register(Title, Tooltip, Legend, LineElement, LinearScale, PointElement, CategoryScale);
export let param = String($page.params.slug);
let ruta_api = `${import.meta.env.VITE_WP_API}posts?slug=${param}`;
let ruta_api_chart = '';
let value = [];
let value_chart = [];
let data_chart = new Array;
let id_chart = [];
const data2 = {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [
{
label: 'My First dataset',
borderColor: 'rgb(205, 130, 158)',
data: [65, 59, 80, 81, 56, 55, 40],
},
{
label: 'My Second dataset',
borderColor: 'rgb(35, 26, 136)',
data: [28, 48, 40, 19, 86, 27, 90],
},
],
};
onMount(async () => {
await loadData();
});
async function loadData() {
const response = await fetch(ruta_api);
const newData = await response.json();
value = [...value, ...newData];
ifChart();
}
async function ifChart(){
//comprobamos si viene una grafica en el contenido
let posicion_chart = value[0].content.rendered.indexOf('m-chart-container-');
if(posicion_chart >= 0){
const regex = /(?<=m-chart-container-)(.*?)(?=-)/mg;
id_chart = value[0].content.rendered.match(regex);
//recorremos los ids
id_chart.forEach(function(id) {
getChart(id);
})
}
};
export async function getChart(id){
ruta_api_chart = `${import.meta.env.VITE_WP_API}m-chart/` + id;
const response_chart = await fetch(ruta_api_chart);
const newData_chart = await response_chart.json();
value_chart = newData_chart['m-chart'];
data_chart = {'labels' : value_chart['data'][0][0], 'datasets': {'label' : value_chart['x_title'], 'data' : value_chart['data'][0][1]}};
};
</script>
<Line {data} options={{ responsive: true }} />
<Line {data2} options={{ responsive: true }} />
<Line {data_chart} options={{ responsive: true }} />
This might be because in
<Line {data} options={{ responsive: true }} />
{data} is the shorthand for data={data}
In the other cases the variable name is different, so try changing to
<Line data={data2} options={{ responsive: true }} />
<Line data={data_chart} options={{ responsive: true }} />

Hide grids in Bar Graph

import React from 'react';
import {
Chart as ChartJS,
CategoryScale,
LinearScale,
BarElement,
Title,
Tooltip,
Legend
} from 'chart.js';
import { Bar } from 'react-chartjs-2';
ChartJS.register(
CategoryScale,
LinearScale,
BarElement,
Title,
Tooltip,
Legend,
);
const options = {
responsive: true,
elements: {
bar: {
borderWidth: 2,
},
},
plugins: {
scales: {
x: {
grid: {
display: false
}
},
y: {
grid: {
display: false
}
},
},
legend: {
display: false,
},
title: {
display: false,
// text: 'Top Application Accessed',
},
},
};
const labels = ["a", "b", "c", "d0", "d", "e", "t"];
const v = [8, 10, 15, 2, 4, 11, 17]
const data = {
labels,
datasets: [
{
label: "Total no of errors",
data: v,
backgroundColor: 'blue',
}
],
};
export default function App() {
return <Bar options={options} data={data} />;
}
In the above code All the code inside scales is not having any effect.
I want to hide grids from my chart.
I want to also add some features to my chart but anything I add to this code having no effect in the results.
Instead of full grids I want dotted grid only parallel to x axis.
I also want to add different colors to all the bars.
You have putted your scale condif in the plugins section of the options object. This is incorrect, you need to place the scales section in the root of the options object. Then it will work fine.
So instead of options.plugins.scales.x and options.plugins.scales.y you will get: options.scales.x and options.scales.y

React chartjs: background gradient not appearing

Trying to create a gradient background for my Line chart. The solution I tried to implement is not working. See screenshot:
I implemented canvas's createLinearGradient() to no avail. What else could I be doing wrong?
Edit: I added all my imports, including the Filler. This way it still doesn't work.
import { Line } from "react-chartjs-2";
import {
Chart as ChartJS,
CategoryScale,
LinearScale,
PointElement,
LineElement,
Title,
Tooltip,
Legend,
Filler,
ScriptableContext,
} from "chart.js";
ChartJS.register(
CategoryScale,
LinearScale,
PointElement,
LineElement,
Title,
Tooltip,
Legend,
Filler
);
function Linechart() {
const labels = ["January", "February", "March", "April", "May", "June"];
const dataLineChart = {
labels: labels,
datasets: [
{
backgroundColor: (context: ScriptableContext<"line">) => {
const ctx = context.chart.ctx;
const gradient = ctx.createLinearGradient(0, 0, 0, 200);
gradient.addColorStop(0, "rgba(250,174,50,1)");
gradient.addColorStop(1, "rgba(250,174,50,0)");
return gradient;
},
label: "UST",
fill: "start",
borderColor: "#8E95DF",
data: [0, 10, 5, 2, 20, 30, 45],
},
],
};
const configLineChart = {
type: "line",
dataLineChart,
elements: {
line: {
tension: 0.35,
},
},
plugins: {
filler: {
propagate: false,
},
},
};
return (
<div>
<div className="px-5 py-3">Fund Profits</div>
<Line data={dataLineChart} options={configLineChart}></Line>
</div>
);
}
export default Linechart;
Edit: When changing this const gradient = ctx.createLinearGradient(0, 0, 0, 200); to const gradient = ctx.createLinearGradient(0, 0, 0, 500); my gradient becomes visible. Can someone explain how that value works?

getting error "this.renderChart is not a function" or "TypeError: Object(...) is not a function" Chart.js Nuxt v2

i want to use chart.js in my nuxt project which is version ^2.15.7.
The issue is that I having these errors in my console when trying to use this plugin in my .vue page.
errors:
this.renderChart is not a function
TypeError: Object(...) is not a function
here is my codes:
nuxt.config.js
plugins: [
{src: '~/plugins/chart.js', mode: 'client'},
],
/plugins/chart.js
import Vue from 'vue'
import { Line } from 'vue-chartjs'
Vue.component('line-chart', {
extends: Line,
props: ['data', 'options'],
mounted () {
this.renderChart(this.data, this.options)
}
})
.vue page
<template>
<client-only>
<line-chart :data="chartData"></line-chart>
</client-only>
</template>
<script>
export default {
data() {
return {
chartData: {
datasets: [{
label: 'Title',
data: [45, 55, 48, 35, 12]
}]
}
};
}
}
</script>
after many searches i finally found out nuxt v2 cant import and use "vue-chartjs" and instead of "vue-chartjs" we should use the "vue-chartjs/legacy",
here is the solution:
installation
1-Run
npm i vue-chartjs
2-Then Run
npm i chart.js hchs-vue-charts
3-/plugins/chart.js
import Vue from "vue";
import { Line } from "vue-chartjs/legacy";
import {
Chart as ChartJS,
Title,
Tooltip,
Legend,
BarElement,
CategoryScale,
LinearScale,
LineElement,
PointElement,
} from "chart.js";
ChartJS.register(
Title,
Tooltip,
Legend,
PointElement,
BarElement,
CategoryScale,
LinearScale,
LineElement,
);
Vue.component("line-chart", {
extends: Line,
});
4-.vue page
<template>
<client-only placeholder="منتظر بمانید...">
<line-chart
:chart-options="options"
:chart-data="chartData"
:height="250"
:width="350"
chart-id="lineChart"
/>
</client-only>
</template>
<script>
chartData: {
labels: ['sun','mon','tues'],
datasets: [
{
label: 'Views',
backgroundColor: ["tomato", "orange", "yellow"],
data: ['0','2','5']
}
]
},
options:{
responsive: true,
legend: {
display: false,
},
title: {
display: true,
text: 'views'
},
scales: {
y: {
suggestedMin: 0,
ticks: {
precision: 0
}
}
}
},
</script>
5-nuxt.config.js (don't forget the mode:'client')
plugins: [
{src: '~/plugins/chart.js', mode: 'client'},
],

How to extract ChartJs data and config properties

We're trying to give colleagues the ability to share ChartJS graphs with each other. Most of our current graphs are dynamic and users can apply filters (dates, add/remove data etc).
The plan is to have a button that, on click, will get the data and properties (labels, line colours, borderWidth, chart type etc) and pass this data via a url. The user can then send that link to someone else. They can open it up to view that chart captured as it was seen by the original user, like a screenshot, but with all the interactive features enabled.
E.g.
stackoverflow.com/shared_chart.php?conf=%7B%22responsive%22:true,%22responsiveA
When a chart is created by myChart = new Chart(ctx, config); ChartJs adds a lot of new properties to the chart object (e.g $plugin, _meta) that I don't need.
And, when I JSON.stringify(myChart.config) I get an error "Uncaught TypeError: Converting circular structure to JSON".
I've added the code needed to create a sample bar chart below:
// HTML needs a canvas element
<-- <canvas id="myChart"></canvas> -->
const ctx = $('#myChart');
let config;
let myChart;
// config would look something like this
config = {
type: 'bar',
data: {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [{
label: 'Dataset 1',
backgroundColor: 'rgba(92,184,92,0.5)',
borderColor: 'rgba(92,184,92,1.000)',
borderWidth: 2,
data: [
1,2,3,4,3,2,1
]
}, {
label: 'Dataset 2',
backgroundColor: 'rgba(66,139,202,0.5)',
borderColor: 'rgba(66,139,202,1)',
borderWidth: 2,
data: [
7,2,3,1,5,2,1
]
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
legend: {
position: 'top',
},
title: {
display: true,
text: 'Chart.js Bar Chart'
}
}
}
myChart = new Chart(ctx,config);
On the page they are directed to, I'd like to grab the GET data and construct a new Chart.
You can exclude the extra properties that Chart.js adds. E.g.:
JSON.stringify(myChart.config, function(key, value) {
if (key === '_meta') return undefined;
else return value;
}