<template>
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<view class="lime-echart" :style="customStyle" v-if="canvasId" ref="limeEchart">
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<!-- #ifndef APP-NVUE -->
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<canvas class="lime-echart__canvas" v-if="use2dCanvas" type="2d" :id="canvasId" :style="canvasStyle"
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:disable-scroll="isDisableScroll" @touchstart="touchStart" @touchmove="touchMove" @touchend="touchEnd" />
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<canvas class="lime-echart__canvas" v-else-if="isPc" :style="canvasStyle" :id="canvasId" :canvas-id="canvasId"
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:disable-scroll="isDisableScroll" @mousedown="touchStart" @mousemove="touchMove" @mouseup="touchEnd" />
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<canvas class="lime-echart__canvas" v-else :width="nodeWidth" :height="nodeHeight" :style="canvasStyle"
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:canvas-id="canvasId" :id="canvasId" :disable-scroll="isDisableScroll" @touchstart="touchStart"
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@touchmove="touchMove" @touchend="touchEnd" />
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<canvas v-if="isOffscreenCanvas" :style="offscreenStyle" :canvas-id="offscreenCanvasId"></canvas>
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<!-- #endif -->
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<!-- #ifdef APP-NVUE -->
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<!-- <web-view
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class="lime-echart__canvas"
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:id="canvasId"
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:style="canvasStyle"
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:webview-styles="webviewStyles"
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ref="webview"
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src="/uni_modules/lime-echart/static/index.html"
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@pagefinish="finished = true"
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@onPostMessage="onMessage"
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></web-view> -->
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<!-- #endif -->
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</view>
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</template>
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<script>
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// #ifdef VUE3
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// #ifdef APP-PLUS
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global = {}
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// #endif
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// #endif
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// #ifndef APP-NVUE
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import {
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Canvas,
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setCanvasCreator,
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dispatch
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} from './canvas';
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import {
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compareVersion,
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wrapTouch,
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devicePixelRatio,
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sleep
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} from './utils';
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// #endif
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// #ifdef APP-NVUE
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import {
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base64ToPath,
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sleep
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} from './utils';
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import {
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Echarts
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} from './nvue'
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// #endif
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const charts = {}
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const echartsObj = {}
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export default {
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name: 'lime-echart',
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props: {
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// #ifdef MP-WEIXIN || MP-TOUTIAO
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type: {
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type: String,
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default: '2d'
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},
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// #endif
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// #ifdef APP-NVUE
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webviewStyles: Object,
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// hybrid: Boolean,
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// #endif
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customStyle: String,
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isDisableScroll: Boolean,
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isClickable: {
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type: Boolean,
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default: true
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},
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enableHover: Boolean,
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beforeDelay: {
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type: Number,
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default: 30
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}
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},
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data() {
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return {
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// #ifdef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
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use2dCanvas: true,
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// #endif
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// #ifndef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
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use2dCanvas: false,
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// #endif
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width: null,
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height: null,
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nodeWidth: null,
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nodeHeight: null,
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canvasNode: null,
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config: {},
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inited: false,
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finished: false,
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file: '',
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platform: '',
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isPc: false,
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isDown: false,
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isOffscreenCanvas: false,
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offscreenWidth: 0,
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offscreenHeight: 0
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};
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},
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computed: {
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canvasId() {
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return `lime-echart${this._ && this._.uid || this._uid}`
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},
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offscreenCanvasId() {
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return `${this.canvasId}_offscreen`
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},
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offscreenStyle() {
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return `width:${this.offscreenWidth}px;height: ${this.offscreenHeight}px; position: fixed; left: 99999px; background: red`
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},
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canvasStyle() {
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return this.width && this.height ? ('width:' + this.width + 'px;height:' + this.height + 'px') : ''
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}
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},
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beforeDestroy() {
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this.clear()
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this.dispose()
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// #ifdef H5
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if (this.isPc) {
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document.removeEventListener('mousewheel', () => {})
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}
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// #endif
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},
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created() {
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// #ifdef H5
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if (!('ontouchstart' in window)) {
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this.isPc = true
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document.addEventListener('mousewheel', (e) => {
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if (this.chart) {
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const touch = this.getTouch(e)
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const handler = this.chart.getZr().handler;
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dispatch.call(handler, 'mousewheel', touch)
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}
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})
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}
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// #endif
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// #ifdef MP-WEIXIN || MP-TOUTIAO || MP-ALIPAY
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const {
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SDKVersion,
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version,
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platform,
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environment
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} = uni.getSystemInfoSync();
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// #endif
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// #ifdef MP-WEIXIN
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this.isPC = /windows/i.test(platform)
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// 截止 2023-03-22 mac pc小程序不支持 canvas 2d
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this.use2dCanvas = platform !== 'mac' && this.type === '2d' && compareVersion(SDKVersion, '2.9.2') >= 0 && !((
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/ios/i.test(platform) && /7.0.20/.test(version)) || /wxwork/i.test(environment)) //&& !this.isPC;
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// #endif
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// #ifdef MP-TOUTIAO
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this.isPC = /devtools/i.test(platform)
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this.use2dCanvas = this.type === '2d' && compareVersion(SDKVersion, '1.78.0') >= 0;
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// #endif
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// #ifdef MP-ALIPAY
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this.use2dCanvas = this.type === '2d' && compareVersion(my.SDKVersion, '2.7.0') >= 0;
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// #endif
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},
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mounted() {
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this.$nextTick(() => {
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this.$emit('finished')
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})
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},
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methods: {
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// #ifdef APP-NVUE
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onMessage(e) {
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const res = e?.detail?.data[0] || null;
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if (res?.event) {
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if (res.event === 'inited') {
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this.inited = true
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}
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this.$emit(res.event, JSON.parse(res.data));
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} else if (res?.file) {
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this.file = res.data
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} else if (!res[0] && JSON.stringify(res[0]) != '{}') {
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console.error(res);
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} else {
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console.log(...res)
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}
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},
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// #endif
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setChart(callback) {
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if (!this.chart) {
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console.warn(`组件还未初始化，请先使用 init`)
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return
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}
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if (typeof callback === 'function' && this.chart) {
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callback(this.chart);
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}
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// #ifdef APP-NVUE
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if (typeof callback === 'function') {
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this.$refs.webview.evalJs(
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`setChart(${JSON.stringify(callback.toString())}, ${JSON.stringify(this.chart.options)})`);
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}
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// #endif
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},
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setOption() {
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if (!this.chart || !this.chart.setOption) {
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console.warn(`组件还未初始化，请先使用 init`)
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return
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}
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this.chart.setOption(...arguments);
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},
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showLoading() {
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if (this.chart) {
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this.chart.showLoading("default", {
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text: "加载中"
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})
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}
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},
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hideLoading() {
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if (this.chart) {
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this.chart.hideLoading()
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}
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},
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clear() {
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if (this.chart) {
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this.chart.clear()
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}
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},
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dispose() {
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if (this.chart) {
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this.chart.dispose()
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}
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},
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resize(size) {
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if (size && size.width && size.height) {
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this.height = size.height
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this.width = size.width
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if (this.chart) {
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this.chart.resize(size)
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}
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} else {
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this.$nextTick(() => {
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uni.createSelectorQuery()
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.in(this)
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.select(`.lime-echart`)
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.boundingClientRect()
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.exec(res => {
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if (res) {
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let {
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width,
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height
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} = res[0];
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this.width = width = width || 300;
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this.height = height = height || 300;
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this.chart.resize({
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width,
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height
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})
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}
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});
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})
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}
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},
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canvasToTempFilePath(args = {}) {
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// #ifndef APP-NVUE
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const {
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use2dCanvas,
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canvasId,
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canvasNode
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} = this;
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return new Promise((resolve, reject) => {
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const copyArgs = Object.assign({
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canvasId,
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success: resolve,
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fail: reject
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}, args);
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if (use2dCanvas) {
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delete copyArgs.canvasId;
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copyArgs.canvas = canvasNode;
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}
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uni.canvasToTempFilePath(copyArgs, this);
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});
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// #endif
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// #ifdef APP-NVUE
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this.file = ''
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this.$refs.webview.evalJs(`canvasToTempFilePath()`);
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return new Promise((resolve, reject) => {
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this.$watch('file', async (file) => {
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if (file) {
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const tempFilePath = await base64ToPath(file)
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resolve(args.success({
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tempFilePath
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}))
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} else {
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reject(args.fail({
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error: ``
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}))
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}
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})
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})
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// #endif
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},
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async init(echarts, ...args) {
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// #ifndef APP-NVUE
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if (arguments && arguments.length < 1) {
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console.error('缺少参数：init(echarts, theme?:string, opts?: object, callback?: function)')
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return
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}
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// #endif
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let theme = null,
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opts = {},
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callback;
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Array.from(arguments).forEach(item => {
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if (typeof item === 'function') {
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callback = item
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}
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if (['string'].includes(typeof item)) {
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theme = item
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}
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if (typeof item === 'object') {
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opts = item
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}
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})
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if (this.beforeDelay) {
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await sleep(this.beforeDelay)
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}
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let config = await this.getContext();
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// #ifndef APP-NVUE
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setCanvasCreator(echarts, config)
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this.chart = echarts.init(config.canvas, theme, Object.assign({}, config, opts))
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if (typeof callback === 'function') {
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callback(this.chart)
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} else {
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return this.chart
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}
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// #endif
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// #ifdef APP-NVUE
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this.chart = new Echarts(this.$refs.webview)
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this.$refs.webview.evalJs(`init(null, null, ${JSON.stringify(opts)}, ${theme})`)
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if (callback) {
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callback(this.chart)
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} else {
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return this.chart
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}
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// #endif
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},
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getContext() {
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// #ifdef APP-NVUE
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if (this.finished) {
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return Promise.resolve(this.finished)
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}
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return new Promise(resolve => {
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this.$watch('finished', (val) => {
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if (val) {
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resolve(this.finished)
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}
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})
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})
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// #endif
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// #ifndef APP-NVUE
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const {
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use2dCanvas
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} = this;
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let dpr = devicePixelRatio
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if (use2dCanvas) {
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return new Promise(resolve => {
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uni.createSelectorQuery()
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.in(this)
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.select(`#${this.canvasId}`)
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.fields({
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node: true,
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size: true
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})
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.exec(res => {
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let {
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node,
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width,
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height
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} = res[0];
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this.width = width = width || 300;
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this.height = height = height || 300;
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const ctx = node.getContext('2d');
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const canvas = new Canvas(ctx, this, true, node);
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this.canvasNode = node
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resolve({
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canvas,
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width,
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height,
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devicePixelRatio: dpr,
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node
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});
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});
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});
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}
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return new Promise(resolve => {
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uni.createSelectorQuery()
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.in(this)
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.select(`#${this.canvasId}`)
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.boundingClientRect()
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.exec(res => {
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if (res) {
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let {
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width,
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height
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} = res[0];
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this.width = width = width || 300;
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this.height = height = height || 300;
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// #ifdef MP-TOUTIAO
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dpr = !this.isPC ? devicePixelRatio : 1 // 1.25
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// #endif
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// #ifndef MP-ALIPAY || MP-TOUTIAO
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dpr = this.isPC ? devicePixelRatio : 1
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// #endif
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// #ifdef MP-ALIPAY || MP-LARK
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dpr = devicePixelRatio
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// #endif
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this.rect = res[0]
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this.nodeWidth = width * dpr;
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this.nodeHeight = height * dpr;
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const ctx = uni.createCanvasContext(this.canvasId, this);
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const canvas = new Canvas(ctx, this, false);
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resolve({
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canvas,
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width,
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height,
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devicePixelRatio: dpr
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});
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}
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});
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});
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// #endif
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},
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// #ifndef APP-NVUE
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getRelative(e) {
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return {
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x: e.pageX - this.rect.left,
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y: e.pageY - this.rect.top,
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wheelDelta: e.wheelDelta
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}
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},
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getTouch(e) {
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return e.touches && e.touches[0] && e.touches[0].x ? e.touches[0] : this.getRelative(e);
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},
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touchStart(e) {
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this.isDown = true
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if (this.chart && ((e.touches.length > 0 || e.touches['0']) && e.type != 'mousemove' || e.type ==
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'mousedown')) {
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const touch = this.getTouch(e)
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this.startX = touch.x
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this.startY = touch.y
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this.startT = new Date()
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const handler = this.chart.getZr().handler;
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dispatch.call(handler, 'mousedown', touch)
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dispatch.call(handler, 'mousemove', touch)
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handler.processGesture(wrapTouch(e), 'start');
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clearTimeout(this.endTimer);
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}
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},
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touchMove(e) {
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if (this.isPc && this.enableHover && !this.isDown) {
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this.isDown = true
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}
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if (this.chart && ((e.touches.length > 0 || e.touches['0']) && e.type != 'mousemove' || e.type ==
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'mousemove' && this.isDown)) {
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const handler = this.chart.getZr().handler;
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dispatch.call(handler, 'mousemove', this.getTouch(e))
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handler.processGesture(wrapTouch(e), 'change');
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}
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},
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touchEnd(e) {
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this.isDown = false
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if (this.chart) {
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const {
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x
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} = e.changedTouches && e.changedTouches[0] || {}
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const touch = (x ? e.changedTouches[0] : this.getRelative(e)) || {};
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const handler = this.chart.getZr().handler;
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const isClick = Math.abs(touch.x - this.startX) < 10 && new Date() - this.startT < 200;
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dispatch.call(handler, 'mouseup', touch)
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handler.processGesture(wrapTouch(e), 'end');
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if (isClick) {
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dispatch.call(handler, 'click', touch)
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} else {
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this.endTimer = setTimeout(() => {
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dispatch.call(handler, 'mousemove', {
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x: 999999999,
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y: 999999999
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});
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dispatch.call(handler, 'mouseup', {
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x: 999999999,
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y: 999999999
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});
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}, 50)
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}
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}
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}
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// #endif
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}
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};
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</script>
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<style scoped>
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.lime-echart {
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position: relative;
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/* #ifndef APP-NVUE */
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width: 100%;
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height: 100%;
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/* #endif */
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/* #ifdef APP-NVUE */
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flex: 1;
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/* #endif */
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}
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.lime-echart__canvas {
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/* #ifndef APP-NVUE */
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width: 100%;
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height: 100%;
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/* #endif */
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/* #ifdef APP-NVUE */
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flex: 1;
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/* #endif */
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}
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</style>
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