77 lines
1.8 KiB
JavaScript
77 lines
1.8 KiB
JavaScript
class DrugsChartView {
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#canvas;
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#chart;
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constructor(canvas) {
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this.#canvas = canvas;
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}
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displayChart(drugDescr) {
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if (this.#chart != null) {
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this.#chart.destroy();
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}
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this.#chart = new Chart(
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this.#canvas,
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{
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type: 'bar',
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plugins: [ChartDataLabels],
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data: this.#getData(drugDescr),
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options: this.#getOptions()
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});
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}
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setData(histoDescr) {
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const data = this.#getData(histoDescr);
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this.#chart.config.data = data;
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this.#chart.update();
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}
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#getData(drugDescr) {
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return {
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labels: drugDescr['DRUG'],
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datasets: [{
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label: 'Fatal',
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data: this.#divide(drugDescr['FATAL'], drugDescr['CASES']),
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backgroundColor: '#FF0000'
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},
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{
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label: 'Recovered',
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data: this.#divide(drugDescr['RECOVERED'], drugDescr['CASES']),
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backgroundColor: '#00FF00'
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}]
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};
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}
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#divide(dividends, divisors) {
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return Utils
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.zip([dividends, divisors])
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.map(([dividend, divisor]) => dividend / divisor);
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}
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#getOptions() {
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return {
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plugins: {
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datalabels: {
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anchor: 'end',
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align: 'top'
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}
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},
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title: {
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display: true,
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position: 'top'
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},
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scales: {
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y: {
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ticks: {
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precision: 0
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},
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title: {
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display: true,
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text: 'Frequency'
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}
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}
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}
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};
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}
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} |