136 lines
3.3 KiB
JavaScript
136 lines
3.3 KiB
JavaScript
import WxCanvas from './wx-canvas';
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import * as echarts from './echarts';
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let ctx;
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Component({
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properties: {
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canvasId: {
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type: String,
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value: 'ec-canvas'
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},
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ec: {
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type: Object
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}
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},
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data: {
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},
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ready: function () {
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if (!this.data.ec) {
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console.warn('组件需绑定 ec 变量，例：<ec-canvas id="mychart-dom-bar" '
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+ 'canvas-id="mychart-bar" ec="{{ ec }}"></ec-canvas>');
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return;
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}
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if (!this.data.ec.lazyLoad) {
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this.init();
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}
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},
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methods: {
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init: function (callback) {
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const version = wx.version.version.split('.').map(n => parseInt(n, 10));
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const isValid = version[0] > 1 || (version[0] === 1 && version[1] > 9)
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|| (version[0] === 1 && version[1] === 9 && version[2] >= 91);
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if (!isValid) {
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console.error('微信基础库版本过低，需大于等于 1.9.91。'
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+ '参见：https://github.com/ecomfe/echarts-for-weixin'
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+ '#%E5%BE%AE%E4%BF%A1%E7%89%88%E6%9C%AC%E8%A6%81%E6%B1%82');
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return;
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}
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ctx = wx.createCanvasContext(this.data.canvasId, this);
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const canvas = new WxCanvas(ctx, this.data.canvasId);
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echarts.setCanvasCreator(() => {
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return canvas;
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});
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var query = wx.createSelectorQuery().in(this);
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query.select('.ec-canvas').boundingClientRect(res => {
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if (typeof callback === 'function') {
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this.chart = callback(canvas, res.width, res.height);
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}
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else if (this.data.ec && typeof this.data.ec.onInit === 'function') {
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this.chart = this.data.ec.onInit(canvas, res.width, res.height);
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}
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else {
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this.triggerEvent('init', {
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canvas: canvas,
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width: res.width,
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height: res.height
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});
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}
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}).exec();
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},
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canvasToTempFilePath(opt) {
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if (!opt.canvasId) {
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opt.canvasId = this.data.canvasId;
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}
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ctx.draw(true, () => {
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wx.canvasToTempFilePath(opt, this);
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});
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},
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touchStart(e) {
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if (this.chart && e.touches.length > 0) {
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var touch = e.touches[0];
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var handler = this.chart.getZr().handler;
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handler.dispatch('mousedown', {
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zrX: touch.x,
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zrY: touch.y
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});
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handler.dispatch('mousemove', {
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zrX: touch.x,
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zrY: touch.y
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});
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handler.processGesture(wrapTouch(e), 'start');
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}
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},
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touchMove(e) {
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if (this.chart && e.touches.length > 0) {
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var touch = e.touches[0];
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var handler = this.chart.getZr().handler;
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handler.dispatch('mousemove', {
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zrX: touch.x,
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zrY: touch.y
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});
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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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if (this.chart) {
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const touch = e.changedTouches ? e.changedTouches[0] : {};
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var handler = this.chart.getZr().handler;
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handler.dispatch('mouseup', {
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zrX: touch.x,
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zrY: touch.y
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});
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handler.dispatch('click', {
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zrX: touch.x,
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zrY: touch.y
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});
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handler.processGesture(wrapTouch(e), 'end');
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}
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}
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}
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});
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function wrapTouch(event) {
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for (let i = 0; i < event.touches.length; ++i) {
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const touch = event.touches[i];
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touch.offsetX = touch.x;
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touch.offsetY = touch.y;
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}
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return event;
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}
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