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index.js
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index.js
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import Visualization from 'zeppelin-vis'
import AdvancedTransformation from 'zeppelin-tabledata/advanced-transformation'
import Highcharts from 'highcharts/highcharts'
require('highcharts/highcharts-more.js')(Highcharts)
require('highcharts/modules/exporting')(Highcharts);
import { CommonParameter, createRangeChartDataStructure, createRangeChartOption, } from './chart/range'
import { ComparativeParameter, createComparativeChartDataStructure, createComparativeOption, } from './chart/comparative'
export default class Chart extends Visualization {
constructor(targetEl, config) {
super(targetEl, config)
const spec = {
charts: {
'range': {
transform: { method: 'array', },
sharedAxis: false,
axis: {
'xAxis': { dimension: 'multiple', axisType: 'aggregator', maxAxisCount: 2, },
'yAxis': { dimension: 'multiple', axisType: 'key', },
'category': { dimension: 'multiple', axisType: 'group', },
},
parameter: CommonParameter,
},
'comparative': {
transform: { method: 'array', },
sharedAxis: false,
axis: {
'xAxis': { dimension: 'single', axisType: 'aggregator', },
'yAxis': { dimension: 'multiple', axisType: 'key', },
'binomial': { dimension: 'single', axisType: 'group', },
},
parameter: ComparativeParameter,
},
},
}
this.transformation = new AdvancedTransformation(config, spec)
}
getChartElementId() {
return this.targetEl[0].id
}
getChartElement() {
return document.getElementById(this.getChartElementId())
}
clearChart() {
if (this.chartInstance) { this.chartInstance.destroy() }
}
hideChart() {
this.clearChart()
this.getChartElement().innerHTML = `
<div style="margin-top: 60px; text-align: center; font-weight: 100">
<span style="font-size:30px;">
Please set axes in
</span>
<span style="font-size: 30px; font-style:italic;">
Settings
</span>
</div>`
}
drawRangeChart(parameter, column, transformer) {
if (column.aggregator.length !== 2) {
this.hideChart()
return /** have nothing to display, if aggregator is not specified at all */
}
const { rows, keyNames, selectors, } = transformer()
const data = createRangeChartDataStructure(rows, selectors, keyNames)
const chartOption = createRangeChartOption(data, parameter, keyNames)
this.chartInstance = Highcharts.chart(this.getChartElementId(), chartOption)
}
drawComparativeChart(parameter, column, transformer) {
if (column.aggregator.length === 0 || column.group.length === 0) {
this.hideChart()
return /** have nothing to display, if aggregator is not specified at all */
}
const { rows, keyNames, selectors, } = transformer()
const data = createComparativeChartDataStructure(rows, selectors, keyNames)
const chartOption = createComparativeOption(Highcharts, data, parameter, keyNames)
this.chartInstance = Highcharts.chart(this.getChartElementId(), chartOption)
this.keepYAxisCenterAsZero(this.chartInstance)
}
keepYAxisCenterAsZero(chart) {
// http://stackoverflow.com/questions/17087704/highcharts-keep-zero-centered-on-y-axis-with-negative-values
let dExt;
const ext = chart.yAxis[0].getExtremes();
const dMax = Math.abs(ext.dataMax);
const dMin = Math.abs(ext.dataMin);
dMax >= dMin ? dExt = dMax : dExt = dMin;
const min = 0 - dExt;
chart.yAxis[0].setExtremes(min, dExt);
}
showError(error) {
this.clearChart()
this.getChartElement().innerHTML = `
<div style="margin-top: 60px; text-align: center; font-weight: 300">
<span style="font-size:30px; color: #e4573c;">
${error.message}
</span>
</div>`
}
render(data) {
const {
chartChanged, parameterChanged,
chart, parameter, column, transformer,
} = data
if (!chartChanged && !parameterChanged) { return }
try {
if (chart === 'range') {
this.drawRangeChart(parameter, column, transformer)
} else if (chart === 'comparative') {
this.drawComparativeChart(parameter, column, transformer)
}
} catch (error) {
console.error(error)
this.showError(error)
}
}
getTransformation() {
return this.transformation
}
}