ISMAIL MASSERAN
126 lines
2.9 KiB
Vue
126 lines
2.9 KiB
Vue
<template>
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<div class="pie-chart" :style="wrapperStyle">
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<canvas ref="canvas"></canvas>
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</div>
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</template>
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<script>
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import Chart from 'chart.js/auto';
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export default {
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name: 'PieChart',
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props: {
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labels: { type: Array, default: () => [] },
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values: { type: Array, default: () => [] },
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datasetLabel: { type: String, default: '' },
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height: { type: [Number, String], default: 240 },
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colors: { type: Array, default: () => [] },
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/** When true, renders a doughnut (ring) chart; `cutout` is applied. */
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doughnut: { type: Boolean, default: false },
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cutout: { type: [String, Number], default: '58%' },
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options: { type: Object, default: () => ({}) }
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},
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data: () => ({
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chart: null
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}),
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computed: {
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wrapperStyle: function () {
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var h = this.height;
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var px = (typeof h === 'number') ? (h + 'px') : String(h);
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return { height: px };
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},
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resolvedColors: function () {
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var base = this.colors || [];
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// Fallback palette (Chart.js-ish defaults) if caller doesn't provide colors.
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var palette = [
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'#4dc9f6', '#f67019', '#f53794', '#537bc4', '#acc236',
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'#166a8f', '#00a950', '#58595b', '#8549ba',
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];
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var out = [];
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var n = Math.max((this.labels || []).length, (this.values || []).length);
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for (var i = 0; i < n; i++) {
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out.push(base[i] || palette[i % palette.length]);
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}
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return out;
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}
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},
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watch: {
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labels: function () { this.renderChart(); },
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values: function () { this.renderChart(); },
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colors: function () { this.renderChart(); },
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doughnut: function () { this.renderChart(); },
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cutout: function () { this.renderChart(); },
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options: {
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handler: function () { this.renderChart(); },
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deep: true
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}
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},
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mounted: function () {
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this.renderChart();
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},
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beforeDestroy: function () {
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this.destroyChart();
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},
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methods: {
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destroyChart: function () {
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if (!this.chart) return;
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try { this.chart.destroy(); } catch (e) { }
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this.chart = null;
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},
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renderChart: function () {
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this.destroyChart();
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if (!this.$refs || !this.$refs.canvas) return;
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var ctx = this.$refs.canvas.getContext('2d');
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var labels = (this.labels || []).map(function (x) { return String(x); });
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var values = (this.values || []).map(function (v) { return Number(v) || 0; });
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var baseOptions = {
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responsive: true,
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maintainAspectRatio: false,
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plugins: {
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legend: { position: 'bottom' },
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tooltip: { enabled: true }
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}
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};
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if (this.doughnut) {
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baseOptions.cutout = this.cutout;
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}
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var mergedOptions = Object.assign({}, baseOptions, this.options || {});
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this.chart = new Chart(ctx, {
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type: this.doughnut ? 'doughnut' : 'pie',
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data: {
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labels: labels,
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datasets: [{
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label: this.datasetLabel,
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data: values,
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backgroundColor: this.resolvedColors,
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borderColor: '#ffffff',
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borderWidth: 1
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}]
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},
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options: mergedOptions
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});
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}
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}
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};
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</script>
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<style scoped>
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.pie-chart {
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width: 100%;
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}
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</style>
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