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151 lines
3.3 KiB
151 lines
3.3 KiB
<template>
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<view class="flex progress_box" :style="style">
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<view>{{ label || '' }}</view>
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<canvas
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class="progress_bar"
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:canvas-id="`cpbar${code}`"
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:id="`cpbar${code}`"
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type="2d"></canvas>
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<view class="value">{{ value || 0 }}</view>
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</view>
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</template>
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<script>
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const START = - Math.PI * 3 / 2 + Math.PI * 1 / 4 - Math.PI * 1 / 24
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const END = Math.PI * 1 / 4 + Math.PI * 1 / 24
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export default {
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props: {
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label: {
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type: String,
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default: '',
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},
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value: {
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type: String | Number,
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default: 0,
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},
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color: {
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type: String,
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default: '#014FA2'
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}
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},
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data() {
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return {
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code: Math.floor(Math.random() * 100).toString()
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}
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},
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computed: {
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style() {
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return `color: ${this.color};`
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}
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},
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mounted() {
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this.drawProgress(this.color)
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},
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methods: {
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drawProgress(color) {
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const ctx = uni.createCanvasContext(`cpbar${this.code}`)
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let Ratio = 1 / 2
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let w = 14 * Ratio
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ctx.setLineWidth(w); // 设置圆环的宽度
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ctx.setStrokeStyle(color); // 设置圆环的颜色
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let width = 126 * Ratio
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let height = 126 * Ratio
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ctx.beginPath();
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let x = width / 2
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let y = height / 2
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let r = 62 * Ratio - w / 2
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ctx.arc(x, y, r, START, END, false);
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ctx.stroke();
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ctx.draw()
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return
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uni.createSelectorQuery().in(this)
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.select('.progress_bar')
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.fields({
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node: true,
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size: true
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})
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.exec(async (res) => {
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// const canvas = res[0].node
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console.log('res', res)
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// Canvas 画布的实际绘制宽高
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// const width = res[0].width
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// const height = res[0].height
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const width = res.width
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const height = res.height
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// //根据dpr调整
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// const dpr = wx.getWindowInfo().pixelRatio
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// canvas.width = width * dpr
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// canvas.height = height * dpr
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// let Ratio = width / 126
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let Ratio = 1
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console.log('Ratio', Ratio)
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// 渲染上下文
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const ctx = uni.createCanvasContext('myCanvas', this)
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console.log('ctx', ctx)
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// ctx.scale(dpr, dpr)
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// ctx.clearRect(0, 0, width, height)
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let w = 14 * Ratio
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ctx.setLineWidth(w); // 设置圆环的宽度
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ctx.setStrokeStyle(color); // 设置圆环的颜色
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// ctx.lineCap = 'round'; // 设置圆环端点的形状
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ctx.beginPath();
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let x = width / 2
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let y = height / 2
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let r = 62 * Ratio - w / 2
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ctx.arc(x, y, r, START, END, false);
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ctx.stroke();
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ctx.draw()
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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 lang="scss" scoped>
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$size: 126rpx;
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.progress_box {
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position: relative;
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width: $size;
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// height: $size;
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height: 154rpx;
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align-items: flex-end;
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font-size: 22rpx;
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line-height: 40rpx;
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}
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.progress_bar {
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position: absolute;
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top: 0;
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left: 0;
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width: $size;
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height: $size;
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}
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.value {
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position: absolute;
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top: 40rpx;
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left: 50%;
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transform: translateX(-50%);
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font-size: 32rpx;
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font-weight: 600;
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}
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</style>
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