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I use NodeJS with ChartJS to render graph directly to a file and it works fine.
I do it by ChartjsNodeCanvas npm module installed.
In order to display labels on the graph I use official ChartJS plugin ChartJS-plugin-datalabels
But it seems like Canvas module has a different scheme of activating ChartJS plugins and most probably I activate datalabels plugin incorrectly. So I can’t get the labels displayed on the graph.
const Chart = require('chart.js');
const datalabels = require('chartjs-plugin-datalabels')
const { CanvasRenderService } = require('chartjs-node-canvas');
const width = 600;
const height = 400;
const chartCallback = (ChartJS) => {
ChartJS.defaults.global.elements.rectangle.borderWidth = 2;
ChartJS.plugins.register({
datalabels
});
};
const canvasRenderService = new CanvasRenderService(width, height, chartCallback);
(async () => {
const configuration = {
type: 'bar',
data: {
datasets: [
{
type:"bar",
barThickness: 24,
label: 'My dataset',
data: ydata['data'],
backgroundColor: 'rgba(75,192, 192, 0.2)',
borderColor: 'rgba(54, 162, 135, 0.2)',
borderWidth: 1,
datalabels: {
align: 'start',
anchor: 'start'
}
},
labels: xdata,
}
options: {
scales: {
yAxes: [
{
id: 'left-y-axis',
position: 'left',
stacked: false,
ticks: {
beginAtZero: true,
callback: (value) => value + "R"
},
},
{
id: 'right-y-axis',
position: 'right'
}
],
xAxes: [{
stacked: true,
}]
},
plugins: {
datalabels: {
backgroundColor: function(context) {
return context.dataset.backgroundColor;
},
borderRadius: 4,
color: 'red',
font: {
weight: 'bold'
},
formatter: Math.round
}
}
}
};
const image = await canvasRenderService.renderToBuffer(configuration);
fs.writeFileSync(tgMsgPath+"test.png", image)
})();
The chart is shown but no labels on the graph.
This is how to activate plugins with ChartJs-niode-canvas:
const chartJsFactory = () => {
const Chart = require('chart.js');
require('chartjs-plugin-datalabels');
delete require.cache[require.resolve('chart.js')];
delete require.cache[require.resolve('chartjs-plugin-datalabels')];
return Chart;
}
// ...
const canvasRenderService = new CanvasRenderService(
chartWidth,
chartHeight,
chartCallback,
undefined,
chartJsFactory
);
I have the following code for the node.js high-Charts export-server the legend is showing but the label formatted is not applied and the function is not executed also
I have tried the load function also and it is not working, I tried custom HTML and it is now showing also
let chartDetails = {
type: "png",
options: {
chart: {
type: "pie",
showInLegend: true,
dataLabels: {
enabled: false
}
},
title: {
align: 'left',
floating: false,
text: 'Main Title',
style: {
fontSize: '24px'
}
},
subtitle: {
verticalAlign: 'middle',
align: 'center',
floating: false,
text: '<b>300</b><br>Total Issues',
style: {
fontSize: '30px'
}
},
plotOptions: {
pie: {
innerSize: '70%',
shadow: false,
showInLegend: true,
dataLabels: {
enabled: false,
}
}
},
legend: {
enabled: true,
floating: true,
borderWidth: 0,
align: 'right',
layout: 'vertical',
verticalAlign: 'middle',
useHTML: true,
labelFormatter: function () {
console.log("this: is equal to ");
console.log(this);
return 'custom word';
}
}
,
series: [
{
data: [
{
name: "a",
y: 100
},
{
name: "b",
y: 20
},
{
name: "c",
y: 50
}
]
}
]
}
};
I expected 'custom word' instead 'a','b','c' is showing
It seems when using node-export-server as a module callback functions are not supported. Check this thread on the module github: https://github.com/highcharts/node-export-server/issues/122.
As a workaround, you can use labelFormat property instead of labelFormatter:
legend: {
enabled: true,
floating: true,
borderWidth: 0,
align: 'right',
layout: 'vertical',
verticalAlign: 'middle',
useHTML: true,
labelFormat: "custom word"
}
i am using highcharts-export-server for export charts and send it to Email in PDF format
while i am trying to export that in localy it was working fine, but on live server when i am trying to export all the charts data-labels disappear.
this is the image from which was exporting from live server.
and here is the image which was exporting locally.
Here is my Code
exports.getPieChartImg = (seriesData, xOrLength, innersize, showLegend, width, height) => {
var chartOpts = {
chart: {
type: 'pie',
width: width,
height: height,
},
plotOptions: {
pie: {
innerSize: innersize || 80,
depth: 25,
allowPointSelect: true,
dataLabels: {
enabled: false,
format: '<b>{point.name}</b>: {point.percentage:.2f} %'
},
showInLegend: showLegend || false,
},
series: {
stacking: 'normal',
dataLabels: {
enabled: true,
color: '#6f6f6f',
format: '{point.percentage:.2f}',
crop: false,
overflow: "none",
},
pointWidth: 30,
}
},
legend: {
labelFormat: '<b>{name}</b> ({percentage:.2f})%',
useHTML: true,
},
series: [{
data: seriesData
}]
};
var exportSettings = generateExportSettings(chartOpts, 'Pie');
return generateBase64Chart(exportSettings)
}
function generateExportSettings(chartOpts, constr) {
return {
// b64: true,
instr: JSON.stringify(chartOpts),
noDownload: true,
constr,
globalOptions: {
colors: ['#3BB9DA', '#0F89A8', '#0B8F8B', '#1DB1AD', '#68E3DF', '#FFB469', '#F58B1F', '#D16900', '#FC3C3C', '#FF6666', '#FC8D8D', '#FCC0C0'],
lang: {
thousandsSep: ','
}
},
scale: false,
styledMode: false,
type: "image/png",
width: false,
};
}
function generateBase64Chart(exportSettings) {
return new Promise((resolve, reject) => {
highchartsExporter.export(exportSettings, function (err, res) {
if (err) {
return reject({
code: '1',
err,
msg: 'Error in stock chart',
exportSettings
})
}
return resolve({
code: '0',
msg: 'success',
data: 'data:image/png;base64,' + res.data,
})
});
})
}
remove node_module and reInstall it again.
and if not installed libfontconfig then install 'sudo apt-get install libfontconfig'
in normal highchart i get svg code with code like this
var chart = $('#container').highcharts()
svg = chart.getSVG();
So, how can i get svg code with this highchart directive in angular js???
i try like normal code but i didn't get svg code.
i use this directive for my highchart
https://github.com/rootux/angular-highcharts-directive
and this my code in controller.js
$scope.chartLogisticGIGR = {
options: {
tooltip: {
shared: true
}
},
xAxis: { // Primary xAxis
categories: $scope.nameMonths,
title: {
text: 'Month'
},
labels: {
enabled: true
},
min:0
},
yAxis: [{ // Primary yAxis
title: {
text: 'GI / GR in IDR'
},
labels: {
formatter: function () {
return Highcharts.numberFormat(this.value / 1000000,'0') + ' mil';
}
}
}, { // Secondary yAxis
title: {
text: 'Balance'
},
labels: {
formatter: function () {
return Highcharts.numberFormat(this.value / 1000000,'0') + ' mil';
}
},
}],
series: [{
name: 'AGP - Goods Receipt',
type: 'column',
stacking: 'normal',
stack: '1',
data: $scope.dataLogisticGIGR_AGP_GR,
color: $rootScope.getColor('AGP Ext'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
},{
name: 'AGP - Goods Issue',
type: 'column',
stacking: 'normal',
stack: '1',
data: $scope.dataLogisticGIGR_AGP_GI,
color: $rootScope.getColor('AGP Int'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
},{
name: 'AGP - Balance',
type: 'spline',
data: $scope.dataLogisticGIGR_AGP_Balance,
color: $rootScope.getColor('AI 2'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
},{
name: 'AI - Goods Receipt',
type: 'column',
stacking: 'normal',
stack: '3',
data: $scope.dataLogisticGIGR_AI_GR,
color: $rootScope.getColor('AI'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
},{
name: 'AI - Goods Issue',
type: 'column',
stacking: 'normal',
stack: '3',
data: $scope.dataLogisticGIGR_AI_GI,
color: $rootScope.getColor('AP 2'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
},{
name: 'AI - Balance',
type: 'spline',
data: $scope.dataLogisticGIGR_AI_Balance,
color: $rootScope.getColor('AP'),
tooltip: {
pointFormat: '<span style="color:{series.color}">{series.name}: {point.y:,.0f}</span><br/>'
}
}],
title: {
text: ''
},
loading: false
};
in this is my code in directive highchart
'use strict';
angular.module('chartsExample.directives',[])
.directive('chart', function () {
return {
restrict: 'E',
template: '<div></div>',
scope: {
chartData: "=value"
},
transclude:true,
replace: true,
link: function (scope, element, attrs) {
var chartsDefaults = {
chart: {
renderTo: element[0],
type: attrs.type || null,
height: attrs.height || null,
width: attrs.width || null
}
};
//Update when charts data changes
scope.$watch(function() { return scope.chartData; }, function(value) {
if(!value) return;
// We need deep copy in order to NOT override original chart object.
// This allows us to override chart data member and still the keep
// our original renderTo will be the same
var newSettings = {};
angular.extend(newSettings, chartsDefaults, scope.chartData);
var chart = new Highcharts.Chart(newSettings);
});
}
};
});
Thank's....
this is code and link on screenshot
Ext.define('SD.view.SDDetail', {
extend: 'Ext.window.Window',
alias: 'widget.sddetail',
title: "Создание заявки",
height: 620,
width: 850,
layout: 'fit',
border: false,
modal: true,
isDemandReadOnly: false,
changeStatusOnly: false,
initComponent: function () {
var me = this;
var user = TR.user;
var f = new Ext.form.FormPanel({
xtype: 'form',
labelWidth: 60
, frame: true
, items: [{
fieldLabel: 'Text'
, xtype: 'textfield'
, anchor: '-18'
}, {
layout: 'column'
, defaults: {
columnWidth: 0.5
//, layout: 'form'
, border: false
, xtype: 'panel'
, bodyStyle: 'padding:0 18px 0 0'
}
, items: [{
defaults: { anchor: '100%' }
, items: [{
xtype: 'combo'
, fieldLabel: 'Combo 1'
, store: ['Item 1', 'Item 2']
}, {
xtype: 'datefield'
, fieldLabel: 'Date'
}]
}, {
defaults: { anchor: '100%' }
, items: [{
xtype: 'combo'
, fieldLabel: 'Combo 2'
, store: ['Item 1', 'Item 2']
}, {
xtype: 'timefield'
, fieldLabel: 'Time'
}]
}]
}, {
fieldLabel: 'Text Area'
, xtype: 'textarea'
, anchor: '-18 -80'
}]
});
this.items = [f];
this.tbar = {
xtype: 'toolbar',
height: 27,
items: [
{
xtype: "tbspacer"
}, "-", {
xtype: "tbspacer"
},
{
text: "Прикрепленные файлы",
icon: "Content/images/btnAttach.gif",
disabled: true,
handler: function (btn, e) { ShowAttachments(r.id, true, me.isDemandReadOnly); }
}, "-", {
xtype: "tbspacer"
}, {
text: "История статусов",
icon: "Content/images/btnHistory.gif",
disabled: true,
handler: function (btn, e) { ShowStatusesHistory(r.id, true); }
}, "-", {
xtype: "tbspacer"
}, {
text: "Информация по сопроводительной карточке",
icon: "Content/images/btnComplect.gif",
disabled: true,
handler: function (btn, e) { ShowComponents(r.id, true, me.isDemandReadOnly); }
}, "-", {
icon: "Content/images/btnPrint.gif",
text: "Сопроводительная карточка изделия",
disabled: true,
handler: function (btn, e) { DemandCardForm(r.id); }
}
]
};
this.buttons = [
{
text: "Сохранить",
action: 'save'
, disabled: me.isDemandReadOnly || user.SdUserViewOnly
}, {
xtype: "button",
text: "Отмена",
handler: function (btn, e) {
me.close();
}
}
];
// me.on('show', function () {
// me.down('kontragentcombo').focus(false, 250);
// });
me.callParent(arguments);
}
http://s002.radikal.ru/i198/1208/e2/7a153ca9b116.jpg
when i uncomment layout: 'form' i have error
namespace is undefined
[Прерывать на этой ошибке]
if (namespace === from || namespace.substring(0, from.length) === from) {
i whant this http://i032.radikal.ru/1208/51/e9b8ba1c1f30.jpg
but have error, what i must do?
layout is not defined in the items of the panel. It's part of the panel's properties (see the docs: Form Panel). Put it before the items.
As a suggestion - it would be easier to see it if your lines had consistent comma layout.