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Added ActivityIndicator loading animation to display before chart #127

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Added ActivityIndicator loading animation to display before chart #127

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190 changes: 110 additions & 80 deletions index.android.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,91 +4,121 @@
* @flow
*/

import React, { Component } from 'react';
import {
AppRegistry,
StyleSheet,
Text,
View
} from 'react-native';
import ChartView from './App/index.js';
/**
* Issue - How to display loading animation before showing chart
* Solution by @BismarkAmanor
* @flow
*/

export default class chartWebView extends Component {
import React, { Component } from "react";
import { AppRegistry, ActivityIndicator } from "react-native";
import ChartView from "./App/index.js";

constructor(props){
export default class chartWebView extends Component {
constructor(props) {
super(props);
this.state = {
timePassed: false, //BismarkAmanor- default timer state
};
}
render() {
var Highcharts='Highcharts';
var conf={
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {

// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
},
title: {
text: 'Live random data'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Random data',
data: (function () {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
// BismarkAmanor- executing timer function when app is rendered
componentDidMount() {
this.setTimeout(() => {
this.setTimePassed();
}, 1000);
}

render() {
var Highcharts = "Highcharts";
var conf = {
chart: {
type: "spline",
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = new Date().getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
},
},
},
title: {
text: "Live random data",
},
xAxis: {
type: "datetime",
tickPixelInterval: 150,
},
yAxis: {
title: {
text: "Value",
},
plotLines: [
{
value: 0,
width: 1,
color: "#808080",
},
],
},
tooltip: {
formatter: function () {
return (
"<b>" +
this.series.name +
"</b><br/>" +
Highcharts.dateFormat("%Y-%m-%d %H:%M:%S", this.x) +
"<br/>" +
Highcharts.numberFormat(this.y, 2)
);
},
},
legend: {
enabled: false,
},
exporting: {
enabled: false,
},
series: [
{
name: "Random data",
data: (function () {
// generate an array of random data
var data = [],
time = new Date().getTime(),
i;

for (i = -19; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: Math.random(),
});
}
return data;
})(),
},
],
};

// BismarkAmanor- Update timer state
setTimePassed = () => {
this.setState({ timePassed: true });
};

for (i = -19; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: Math.random()
});
}
return data;
}())
}]
};
return (
<ChartView style={{flex:1}} config={conf} stock={false}></ChartView>
);
// BismarkAmanor- display loading animation if timePassed state is false
if (this.state.timePassed) {
return <ActivityIndicator size="small" color="#0000ff" />;
} else {
return (
<ChartView style={{ flex: 1 }} config={conf} stock={false}></ChartView>
);
}
}
}
AppRegistry.registerComponent('chartWebView', () => chartWebView);
AppRegistry.registerComponent("chartWebView", () => chartWebView);
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