66 lines
2.0 KiB
JavaScript
66 lines
2.0 KiB
JavaScript
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var lineGraph = {
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css: null,
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exports: {
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updateCanvas() {
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let canvas = this.$("canvas");
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let cx = canvas.getContext("2d");
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//Default context properties
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cx.textBaseline = "middle";
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cx.textAlign = "center";
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let width = canvas.width;
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let height = canvas.height;
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let spacing = 1; //Controls the spacing between each horizontal elements
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let data = this.state.data;
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cx.clearRect(0, 0, width, height);
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if (!data) return;
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let total = data.reduce((total, current) => total + current.value, 0);
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let curr = 0;
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let counter = 0;
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for (let field of data) {
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let start = curr + spacing;
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let barWidth = field.value / total * width - spacing * 2;
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let text = `${Math.round(field.value / total * 1000) / 10}% (${field.name})`;
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cx.fillStyle = this.colors[counter];
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cx.fillRect(start, 0, barWidth, height / 3);
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cx.fillStyle = "#FFFFFF";
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if (cx.measureText(text).width < barWidth) {
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cx.fillText(text, start + barWidth / 2, height / 6);
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} else if (cx.measureText("...").width < barWidth) {
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cx.fillText("...", start + barWidth / 2, height / 6);
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}
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curr += field.value / total * width;
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counter++;
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}
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},
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onMounted() {
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this.colors = ["#003F5C", "#2F4B7C", "#665191", "#A05195", "#D45087"];
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this.state.data = [{
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name: "P",
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value: 100
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}, {
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name: "AB",
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value: 200
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}, {
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name: "B",
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value: 150
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}, {
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name: "TB",
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value: 50
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}, {
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name: "TBF",
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value: 50
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}];
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let canvas = this.$("canvas");
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canvas.width = canvas.clientWidth;
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canvas.height = canvas.clientHeight;
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this.updateCanvas();
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}
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},
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template: (template, expressionTypes, bindingTypes, getComponent) => template('<div style="height: inherit;"><canvas style="height: 100%; width: 100%;"></canvas></div>', []),
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name: 'line-graph'
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};
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export { lineGraph as default };
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