I would like to add centered text in the middle of donut hole pie chart in Grafana like the image below
https://i.stack.imgur.com/XVAAg.png
I am using pie chart plugin of Grafana
In file C:\Program Files\GrafanaLabs\grafana\data\plugins\piechart-panel\src\rendering.ts there is function "addPieChart".
Need to add these raws:
let sumData = 0
ctrl.data.forEach((elem: any) => {
sumData = sumData + elem.data;
}); //.reduce(reducer)
const plotCanvas = $('<div><div style="position: absolute;left: 49%;top: 40%;z-index: 1000;"> '+ sumData + '</div></div>');
in line with:
const plotCanvas = $('<div><div');
Related
New to Highcharts, need to make a waterfall and stack column chart, as in attached image. I have completed the chart but unable to get the legend for the stack column.
https://jsfiddle.net/b9vLxoua/ Here is the chart code
Required chart with legend highlighted
Please help.
You can create a custom legend by using the SVERenderer tool on the render callback.
Demo: https://jsfiddle.net/BlackLabel/qhr6nsw9/
render() {
let chart = this,
colors = ['#003975', '#F9BD50', '#3FA27E']
chart.series[1].points.forEach((p,i) => {
if (p.category === 0) {
if (p.customRect) {
p.customRect.destroy();
}
p.customRect = chart.renderer.rect(chart.plotSizeX + chart.plotLeft + 10, 100 + i * 50, 20, 20, 5)
.attr({
fill: colors[i],
zIndex: 3
})
.add();
if (p.customText) {
p.customText.destroy();
}
p.customText = chart.renderer.label(p.t, chart.plotSizeX + chart.plotLeft + 40, 100 + i * 50).add()
}
})
}
API: https://api.highcharts.com/class-reference/Highcharts.SVGRenderer#label
API: https://api.highcharts.com/highcharts/chart.events.render
I am using google charts and have a page of mixed charts, some pie, a column chart and a gauge chart
The page has an option to generate a pdf, so I am converting the charts to PNG to use in the pdf..
all the charts are generated in the same manner, using a div to display the google chart and a hidden div to store the png image
var chart = new google.visualization.Gauge(document.getElementById('gauge'));
var hidden = new google.visualization.Gauge(document.getElementById('gauge_hidden'));
// Wait for the chart to finish drawing before calling the getImageURI() method.
google.visualization.events.addListener(chart, 'ready', function () {
gauge_hidden.innerHTML = '<img src="' + chart.getImageURI() + '">';
});
chart.draw(data, options);
this code works fin on he pie and column charts, but on the gauge chart I am seeing
chart.getImageURI is not a function
any ideas how I can get the png?
CHeers
I was facing this same issue, but after some reading i've come to this solution:
I'm using jQuery to make this a little easier.
First, use XMLSerializer to convert the SVG chart to a string and then use btoa to convert that to base64.
You can use this string this way:
var s = new XMLSerializer().serializeToString($(chart_div).find('svg')[0]);
var base64String = "data:image/svg+xml;base64," + window.btoa(s);
In my case i needed to draw the gauge chart to a PDF and DOMPDF doesn't support this format, so if you need a "data:image/png;base64," string, you can continue with this solution.
You need to set the "svg+xml;base64" as src of a new Image and then draw that image to a Canvas. After that you can use toDataURL method from canvas to get the content as base64 png.
var s = new XMLSerializer().serializeToString($(chart_div).find('svg')[0]);
var image = new Image();
image.width = 640;
image.height = 480;
image.src = 'data:image/svg+xml;base64,' + window.btoa(s);
var myCanvas = document.createElement('canvas');
myCanvas.width = 640;
myCanvas.height = 480;
var myCanvasContext = myCanvas.getContext('2d');
myCanvasContext.drawImage(image,0,0);
// get google chart gague to base64, yey!
var base64String = myCanvas.toDataURL();
Thanks to the author of this answer and this post
How to add values(space) from the right side
like here
enter image description here
my code here
https://jsfiddle.net/ruit/esv6t6f2/
You can add an attribute 'spacingRight' like this in your chart array:
// Create the chart
chart = $('#container').highcharts('StockChart', {
chart: {
spacingRight: 100,
I have made a Google column chart.
It displays ok. but the vertical axis label is showing an unit that I never set myself.
here is the screen shot.
I don't understand why it displays "1 td" instead of 1000 , "1,2 td" instead of 1200.
Here is my code:
google.load("visualization", "1.1", {packages:["bar"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
….
….
]);
var options = {
title: 'My Test',
};
var chart = new google.charts.Bar(document.getElementById('columnchart_material'));
chart.draw(data, options);
<div id="columnchart_material" style="width: 900px; height: 500px;"></div>
my code has nothing special part for the vertical axis and I used from google chart gallery. why it gets 'td' unit for vertical axis even I didn't set myself?
Is it Google column chart default option?
I try to manipulate the vertical axis value with vAxis:. but no luck.
Any advices?
Apparently, when using material bar charts, the y-axis (vAxis) default format is short, meaning showing td for thousands and so on. To reset this set format to '' :
var options = {
axes : {
y : {
all : {
format : {
pattern : ''
}
}
}
}
}
var chart = new google.charts.Bar(document.getElementById('columnchart_material'));
chart.draw(data, options);
demo -> http://jsfiddle.net/sfc9aLd4/
But the material charts are still in beta, and a lot of the options are yet not documented or documented poorly. Luckily we can use the google visualization options object layout and convert it with convertOptions(options) :
var options = {
vAxis : {
format : '' //or #####
}
}
var chart = new google.charts.Bar(document.getElementById('columnchart_material'));
chart.draw(data, google.charts.Bar.convertOptions(options));
Will result in the same as above axes : { ... }
demo -> http://jsfiddle.net/3aq7gucd/
With material charts there seems to be some differences for format. 'none' is now ''. decimal should be changed to ####.## or likewise. scientific, currency and percent works as before.
I've added a nvd3 chart to my sencha touch app.
Apparently though the size of the box where the chart will be inserted is undefined at the time the chart is created. This turns out in a graph with standard dimensions (960x350 approx), way too large!
How can I modify the widht and height of the chart? The visual error I get is that the chart has a larger width, the component containing it are smaller and the chart is not completely
visible (it's like it misses a resize effect to adapt its size to the containing box).
My code, which is inside a sencha component goes like this:
nv.addGraph(Ext.bind(function(){
var chart = nv.models.discreteBarChart()
.x(function(d) { return d.label; })
.y(function(d) { return d.value; })
.staggerLabels(true)
.tooltips(false)
.showValues(true);
var w = 550;
var h = 280;
var svg = d3.select(this.innerElement.dom).append('svg');
// setting axis property doesn't work:
var x = d3.scale.ordinal()
.domain(d3.range(10))
.rangeRoundBands([0, w], 1);
chart.xAxis
.tickFormat(d3.format(',f'));
chart.xAxis.scale(x);
chart.yAxis
.tickFormat(d3.format(',f'));
//setting svg properties doesn't work:
svg.attr("width", w)
.attr("height", h);
svg.datum(this.getChartData()).transition().duration(500).call(chart);
//if I comment this, nothing changes, what is this method for?
nv.utils.windowResize(chart.update);