Develop Reference

Drawing apexchart timeline chart with dynamic series of data

hi guys i am trying apexchart.js librry to draw a timeline chart.
i want a multiple series depending on tasks i have in sprint in bubble.io in which i want to give name and data parameter dynamically.
following is my code
<div id='chart' style='height: 70vh;'></div>
<script>
var task=[Parent group's Sprint's tasks:each item's Name:formatted as JSON-safe];
var names=[Parent group's Sprint's tasks:each item's developer:unique elements's Fname:formatted as JSON-safe];
var _startDates=[Parent group's Sprint's tasks:each item's Start-date:extract UNIX];
var _endDates=[Parent group's Sprint's tasks:each item's End-date:extract UNIX];
var startDates=[];
var endDates=[];
for(var i=0;i<task.length;i++){
startDates.push(new Date(_startDates[i]));
endDates.push(new Date(_endDates[i]));
}
console.log(names);
function getResult(){
var result=[];
var _data=[];
for (var j=0;j<task.lenght;j++){
_data.push({x:task[i],y:[startDates[i].getTime(), endDates[i].getTime()], fillColor: "#008FFB"})
}
for(var i=0;i<names.length;i++){
result.push({name:names[i],data: _data[i]});
}
return result;
}
var options = {
series:[
getResult()
],
chart: {
height: 450,
type: 'rangeBar'
},
plotOptions: {
bar: {
horizontal: true
}
}, xaxis: {
type: 'datetime'
}
};
var chart = new ApexCharts(document.querySelector("#chart"), options);
chart.render();
</script>
but it is giving me an error saying
It is a possibility that you may have not included 'data' property in series.
i would appreciate if anyone can suggest me where i am making mistake
thanks

Show live data on Highcharts without default series

I found this code from Highchart website: https://jsfiddle.net/gh/get/library/pure/highcharts/highcharts/tree/master/samples/highcharts/demo/dynamic-update/
I want to show data on a chart with empty default series and put dateTime as xAxis. I don't want to use jQuery and do not want to add point on load event in chart. I just want to add point when page is loaded completely. I used this
const chart = new Highcharts.chart('container', {
...
...
...
}
document.addEventListener('DOMContentLoaded', function() {
var i = 0;
console.log(chart)
setInterval(function() {
console.log(values[i])
chart.series[0].addPoint(values[i], true, true);
i++;
}, 1000);
})
I used the chart structure like the link above. values[i] is a point which is [dateTime, Number] that I get it from my an API. I found some solutions that uses category for xAxis but I need to use dateTime and show the dateTime there not category.

You can not add a point with shift to a series without data. Add first point without shift or do not use shift: http://jsfiddle.net/BlackLabel/0h9jz3t1/
const chart = new Highcharts.chart('container', {
series: [{}]
});
const values = [[100, 20], [200, 20], [300, 20], [400, 20], [500, 20]];
document.addEventListener('DOMContentLoaded', function() {
var i = 0;
chart.series[0].addPoint(values[i], true, false);
i++;
setInterval(function() {
chart.series[0].addPoint(values[i], true, true);
i++;
}, 1000);
});
Live demo: http://jsfiddle.net/BlackLabel/oqp30tna/
API: https://api.highcharts.com/class-reference/Highcharts.Series#addPoint

How to create custom legend in ChartJS

I need to create custom legend for my donut chart using ChartJS library.
I have created donut with default legend provided by ChartJS but I need some modification.
I would like to have value above the car name. Also I don't like sticky legend I want to have it separate from donut so I can change the style for fonts, boxes (next to the text "Audi" for example)
I know there is some Legend generator but I'm not sure how to use it with VueJS - because I'm using VueJS as a framework
This is how my legend looks like now - http://imgur.com/a/NPUoi
My code:
From Vue component where I import a donut component:
<div class="col-md-6">
<div class="chart-box">
<p class="chart-title">Cars</p>
<donut-message id="chart-parent"></donut-message>
</div>
</div>
Javascript:
import { Doughnut } from 'vue-chartjs'
export default Doughnut.extend({
ready () {
Chart.defaults.global.tooltips.enabled = false;
Chart.defaults.global.legend.display = false;
this.render({
labels: ['Audi','BMW','Ford','Opel'],
datasets: [
{
label: 'Cars',
backgroundColor: ['#35d89b','#4676ea','#fba545','#e6ebfd'],
data: [40, 30, 20, 10]
}
]
},
{
responsive: true,
cutoutPercentage: 75,
legend: {
display: true,
position: "right",
fullWidth: true,
labels: {
boxWidth: 10,
fontSize: 14
}
},
animation: {
animateScale: true
}
})
}
});

I'm having the same problem trying to understand the documentation and this link might clarify the process of customize the legends:
https://codepen.io/michiel-nuovo/pen/RRaRRv
The trick is to track a callback to build your own HTML structure and return this new structure to ChartJS.
Inside the options object:
legendCallback: function(chart) {
var text = [];
text.push('<ul class="' + chart.id + '-legend">');
for (var i = 0; i < chart.data.datasets[0].data.length; i++) {
text.push('<li><span style="background-color:' +
chart.data.datasets[0].backgroundColor[i] + '">');
if (chart.data.labels[i]) {
text.push(chart.data.labels[i]);
}
text.push('</span></li>');
}
text.push('</ul>');
return text.join("");
}
Second, you need a container to insert the new html and using the method myChart.generateLegend() to get the customized html:
$("#your-legend-container").html(myChart.generateLegend());
After that, if you need, track down the events:
$("#your-legend-container").on('click', "li", function() {
myChart.data.datasets[0].data[$(this).index()] += 50;
myChart.update();
console.log('legend: ' + data.datasets[0].data[$(this).index()]);
});
$('#myChart').on('click', function(evt) {
var activePoints = myChart.getElementsAtEvent(evt);
var firstPoint = activePoints[0];
if (firstPoint !== undefined) {
console.log('canvas: ' +
data.datasets[firstPoint._datasetIndex].data[firstPoint._index]);
}
else {
myChart.data.labels.push("New");
myChart.data.datasets[0].data.push(100);
myChart.data.datasets[0].backgroundColor.push("red");
myChart.options.animation.animateRotate = false;
myChart.options.animation.animateScale = false;
myChart.update();
$("#your-legend-container").html(myChart.generateLegend());
}
}
Another solution that I found, if you don't need to change the HTMl structure inside the legend, you can just insert the same HTML in your legend container and customize it by CSS, check this another link:
http://jsfiddle.net/vrwjfg9z/
Hope it works for you.

You can extract the legend markup.
data () {
return {
legendMarkup: ''
}
},
ready () {
this.legendMarkup = this._chart.generateLegend()
}
And in your template you can output it.
<div class="legend" ref="legend" v-html="legendMarkup"></div>
this._chart is the internal chartjs instance in vue-chartjs. So you can call all chartjs methods which are not exposed by vue-chartjs api over it.
However you can also use the legend generator. The usage is the same in vue. You can pass in the options, use callbacks etc.

please check this documentation
.
Legend Configuration
The chart legend displays data about the datasets that area appearing on the chart.
Configuration options
Position of the legend. Options are:
'top'
'left'
'bottom'
'right'
Legend Item Interface
Items passed to the legend onClick function are the ones returned from labels.generateLabels. These items must implement the following interface.
{
// Label that will be displayed
text: String,
// Fill style of the legend box
fillStyle: Color,
// If true, this item represents a hidden dataset. Label will be rendered with a strike-through effect
hidden: Boolean,
// For box border. See https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/lineCap
lineCap: String,
// For box border. See https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash
lineDash: Array[Number],
// For box border. See https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset
lineDashOffset: Number,
// For box border. See https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin
lineJoin: String,
// Width of box border
lineWidth: Number,
// Stroke style of the legend box
strokeStyle: Color
// Point style of the legend box (only used if usePointStyle is true)
pointStyle: String
}
Example
The following example will create a chart with the legend enabled and turn all of the text red in color.
var chart = new Chart(ctx, {
type: 'bar',
data: data,
options: {
legend: {
display: true,
labels: {
fontColor: 'rgb(255, 99, 132)'
}
}
}
});
Custom On Click Actions
It can be common to want to trigger different behaviour when clicking an item in the legend. This can be easily achieved using a callback in the config object.
The default legend click handler is:
function(e, legendItem) {
var index = legendItem.datasetIndex;
var ci = this.chart;
var meta = ci.getDatasetMeta(index);
// See controller.isDatasetVisible comment
meta.hidden = meta.hidden === null? !ci.data.datasets[index].hidden : null;
// We hid a dataset ... rerender the chart
ci.update();
}
Lets say we wanted instead to link the display of the first two datasets. We could change the click handler accordingly.
var defaultLegendClickHandler = Chart.defaults.global.legend.onClick;
var newLegendClickHandler = function (e, legendItem) {
var index = legendItem.datasetIndex;
if (index > 1) {
// Do the original logic
defaultLegendClickHandler(e, legendItem);
} else {
let ci = this.chart;
[ci.getDatasetMeta(0),
ci.getDatasetMeta(1)].forEach(function(meta) {
meta.hidden = meta.hidden === null? !ci.data.datasets[index].hidden : null;
});
ci.update();
}
};
var chart = new Chart(ctx, {
type: 'line',
data: data,
options: {
legend: {
}
}
});
Now when you click the legend in this chart, the visibility of the first two datasets will be linked together.
HTML Legends
Sometimes you need a very complex legend. In these cases, it makes sense to generate an HTML legend. Charts provide a generateLegend() method on their prototype that returns an HTML string for the legend.
To configure how this legend is generated, you can change the legendCallback config property.
var chart = new Chart(ctx, {
type: 'line',
data: data,
options: {
legendCallback: function(chart) {
// Return the HTML string here.
}
}
});

c3.js tooltip - make static and style

I have a c3.js stacked barchart that updates when you hover over a Leaflet map, and I need the tooltip to be static as otherwise the user will hover over other areas of the map and change the data in the barchart, before actually reaching it. However, I'm new to coding and especially new to C3 and I can't get around how to make the tooltip static. Also, does anyone know how to style the tooltip later? I have only found very complex examples online, but it feels like I should be able to do it somewhere after I generate the chart.
Any help would be much appreciated!
Here is my code:
function getMiniChartData(properties) {
var values = [
['rape', rape[properties['gss_code']]],
['other sexual', other_sexual[properties['gss_code']]]];
console.log(values);
return values;
}
var chart;
function drawMiniChart(properties) {
console.log('drawing mini chart');
var data = getMiniChartData(properties);
chart = c3.generate({
bindto: '#minichart',
color: {
pattern: ['#E31A1C', '#BD0026']
},
point: {
show: false
},
tooltip: {
show: true
},
data: {
columns: data,
type: 'bar',
groups: [
['rape', 'other sexual']
]
},
axis: {
y: {
max:60,
min:0
}
},
grid: {
y: {
lines: [{
value: 0
}]
}
}
});
}
function updateMiniChartData(properties) {
console.log('updating mini chart');
var data = getMiniChartData(properties);
chart.load({
columns: data
});
}

Just edit the position in the tooltip :
position: function () {
var position = c3.chart.internal.fn.tooltipPosition.apply(this, arguments);
position.top = 0;
return position;
}
This will set the tooltip to always be at the top of the point. So it stays at the same y coordinate (top:0) but follows the points x value. You could go further and set it to stay at one position on the page.
Check this fiddle I have put together : http://jsfiddle.net/thatOneGuy/owhxgaqm/185/
This question will help you out : C3 charts - contents of tooltip clickable
If you want it visible all the time just add this code :
var originalHideTooltip = chart.internal.hideTooltip
chart.internal.hideTooltip = function () {
setTimeout(originalHideTooltip, 100)
};

Hide bubble in nvd3 bubble chart

I am using nvd3 bubble chart. I want to hide the bubble which contains size:0;
I have two data :-
var data = [];
data.push({key: 'Male(Yes)', values: []});
data['0'].values.push({
x: 1
, y: 1
, size: 0
});
data.push({key: 'Male(No)', values: []});
data['1'].values.push({
x: -1
, y: -1
, size: 20
});
I don't want to show bubble which has size:0;.
How can i hide the bubble?

You can do that by applying a CSS style (visibility:hidden/display:none/opacity:0) to the individual data point. One way of doing this is to select all svg objects of the type point - depending on your names used and then filter them according to size, then apply the new style to them.
svg.selectAll("#yourname svg")
.filter(function (l) {
return l.size== 0;
})[0].forEach(function (d){
d.style("visibility","hidden")
})