293 lines
7.6 KiB
Vue
293 lines
7.6 KiB
Vue
<template>
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<div :class="wrapper" class="canvas" @click="onClick" @mousemove.stop="onMousemove" @mouseup="onMouseUp" @mouseleave="isHide = true" v-if="isInit">
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<canvas :id="id" :style="{height: '52px'}" v-if="canvasWidth" :width="canvasWidth" height="52">
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</canvas>
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<div class="time" v-show="!isHide" :style="{left: left + 'px'}">{{ time }}</div>
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<div class="time-scale" :style="{left: x + 'px'}">
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<span></span>
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</div>
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<img @mousedown="onDragDown" class="drag-img" :style="{left: x + 'px'}" src="https://cdn.cunwuyun.cn/slw2.0/images/drag.png" />
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</div>
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</template>
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<script>
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export default {
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props: ['isLiveing', 'times'],
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data () {
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return {
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ctx: null,
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canvasWidth: '',
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canvasHeight: '',
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scale: 4,
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time: '',
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left: 0,
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x: 0,
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ratioW: '',
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isHide: true,
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isInit: false,
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isChoose: false,
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wrapper: `canvas-${new Date().getTime()}`,
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id: `timeline-${new Date().getTime()}`,
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timer: null
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}
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},
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watch: {
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isLiveing () {
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this.countdown()
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},
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times: {
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deep: true,
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handler (v) {
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if (v.length && this.ctx) {
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this.init()
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}
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}
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}
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},
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mounted () {
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this.$nextTick(() => {
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this.init()
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})
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},
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destroyed () {
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clearInterval(this.timer)
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},
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methods: {
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onMousemove (e) {
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const canvasInfo = document.querySelector(`#${this.id}`).getBoundingClientRect()
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const seconds = 24 * 60 * 60
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if (e.clientY - canvasInfo.top < 29) {
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const x = e.clientX - canvasInfo.left
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const unit = seconds / this.canvasWidth * x
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this.left = x
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this.time = this.secTotime(unit)
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this.isHide = false
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if (!this.isChoose) return
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this.x = e.clientX - canvasInfo.left
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this.ratioW = this.x / this.canvasWidth
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} else {
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this.isHide = true
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}
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},
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onClick (e) {
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const canvasInfo = document.querySelector(`#${this.id}`).getBoundingClientRect()
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if (e.clientY - canvasInfo.top < 29) {
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this.x = e.clientX - canvasInfo.left
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clearInterval(this.timer)
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this.timer = null
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const time = this.secTotime((24 * 60 * 60) / this.canvasWidth * this.x)
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this.$emit('replay', time)
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}
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},
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onDragDown () {
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this.isChoose = true
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},
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onMouseUp () {
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if (!this.isChoose) return
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clearInterval(this.timer)
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this.timer = null
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this.isChoose = false
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const time = this.secTotime((24 * 60 * 60) / this.canvasWidth * this.x)
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this.$emit('replay', time)
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},
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secTotime (s) {
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let second = parseInt(s)
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let minute = 0
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let hour = 0
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if (second > 60) {
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minute = parseInt(second / 60)
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second = parseInt(second % 60)
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if (minute > 60) {
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hour = parseInt(minute / 60)
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minute = parseInt(minute % 60)
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}
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}
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hour = `${parseInt(hour) > 9 ? parseInt(hour) : '0' + parseInt(hour)}`
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minute = `${parseInt(minute) > 9 ? parseInt(minute) : '0' + parseInt(minute)}`
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second = `${parseInt(second) > 9 ? parseInt(second) : '0' + parseInt(second)}`
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return `${hour}:${minute}:${second}`
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},
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init () {
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if (this.timer) {
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clearInterval(this.timer)
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this.timer = null
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}
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this.ratioW = this.x / this.canvasWidth
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this.$nextTick(() => {
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this.isInit = true
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this.$nextTick(() => {
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this.canvasWidth = document.querySelector(`.${this.wrapper}`).offsetWidth
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this.canvasHeight = document.querySelector(`.${this.wrapper}`).offsetHeight
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this.$nextTick(() => {
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const el = document.querySelector(`#${this.id}`)
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this.ctx = el.getContext('2d')
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this.ctx.width = document.querySelector('.canvas').offsetWidth
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this.ctx.height = document.querySelector('.canvas').offsetHeight
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if (this.x > 0) {
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this.x = this.ratioW * this.canvasWidth
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} else {
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this.initNowTime()
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}
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this.renderTimeLine()
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this.renderPlayback()
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this.countdown()
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})
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})
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})
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},
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countdown () {
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this.timer = setInterval(() => {
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if (this.isLiveing) {
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this.initNowTime()
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} else {
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this.x = this.x + this.canvasWidth / (24 * 60 * 60)
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}
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}, 1000)
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},
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initNowTime () {
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const date = new Date()
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const seconds = date.getHours() * 3600 + date.getMinutes() * 60 + date.getSeconds()
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this.x = this.canvasWidth / (24 * 60 * 60) * seconds
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},
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drawLine(ctx, options) {
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const { beginX, beginY, endX, endY, lineColor, lineWidth } = options
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ctx.lineWidth = lineWidth
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ctx.strokeStyle = lineColor
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ctx.beginPath()
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ctx.moveTo(beginX, beginY)
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ctx.lineTo(endX, endY)
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ctx.closePath()
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ctx.stroke()
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},
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renderPlayback () {
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const ctx = this.ctx
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const unit = this.canvasWidth / (24 * 60 * 60)
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this.times.forEach(item => {
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this.drawLine(ctx, {
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beginX: item.startTime * unit,
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beginY: 28,
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endX: item.startTime * unit,
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endY: 0,
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lineColor: 'rgba(0, 156, 255, 1)',
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lineWidth: item.endTime * unit - item.startTime * unit
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})
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})
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},
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renderTimeLine () {
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const ctx = this.ctx
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ctx.fillStyle = 'rgba(51, 60, 83, 0.8)'
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ctx.fillRect(0, 0, this.canvasWidth, 28)
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ctx.fillStyle = 'rgba(32, 40, 61, 0.8)'
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ctx.fillRect(0, 28, this.canvasWidth, 24)
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ctx.fillStyle = '#fff'
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ctx.font = '12px Arial'
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const w = this.canvasWidth / 24
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for (let i = 1; i < 25; i ++) {
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this.drawLine(ctx, {
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beginX: i * w,
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beginY: 28,
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endX: i * w,
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endY: i % this.scale === 0 ? 16 : 20,
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lineColor: i % this.scale === 0 ? 'red' : '#000',
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lineWidth: i % this.scale === 0 ? 1 : 1
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})
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if (i % this.scale === 0) {
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const text = (i < 10 ? '0' + i : i) + ': 00'
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const textWidth = ctx.measureText(text).width
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if (i === 24) {
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ctx.fillText(text, i * w - textWidth, 44)
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} else {
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ctx.fillText(text, i * w - textWidth / 2, 44)
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}
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}
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}
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if (!this.times.length) {
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ctx.stroke()
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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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.canvas {
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position: relative;
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width: 100%;
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height: 52px;
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.drag-img {
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position: absolute;
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left: 0;
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top: 0;
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z-index: 1;
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user-select: none;
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cursor: e-resize;
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-webkit-user-drag: none;
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// transform: translateX(-50%);
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}
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.time-scale {
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display: flex;
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position: absolute;
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align-items: center;
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justify-content: center;
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left: 0;
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bottom: 0;
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z-index: 1;
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user-select: none;
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width: 12px;
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height: 24px;
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span {
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width: 2px;
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height: 24px;
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background: rgba(255, 255, 255, 0.8);
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}
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}
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.time {
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position: absolute;
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bottom: 22px;
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left: 0;
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z-index: 1;
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padding: 2px 4px;
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font-size: 12px;
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color: #fff;
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background: rgba(0, 0, 0, 1);
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transform: translate(-50%, 100%);
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}
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}
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</style> |