调整分包，完成隐私协议（样式待优化）
This commit is contained in:
249
childPackage/components/echarts/ec-canvas.js
Normal file
249
childPackage/components/echarts/ec-canvas.js
Normal file
@@ -0,0 +1,249 @@
|
||||
import WxCanvas from './wx-canvas';
|
||||
import * as echarts from './echarts';
|
||||
|
||||
let ctx;
|
||||
|
||||
function compareVersion(v1, v2) {
|
||||
v1 = v1.split('.')
|
||||
v2 = v2.split('.')
|
||||
const len = Math.max(v1.length, v2.length)
|
||||
|
||||
while (v1.length < len) {
|
||||
v1.push('0')
|
||||
}
|
||||
while (v2.length < len) {
|
||||
v2.push('0')
|
||||
}
|
||||
|
||||
for (let i = 0; i < len; i++) {
|
||||
const num1 = parseInt(v1[i])
|
||||
const num2 = parseInt(v2[i])
|
||||
|
||||
if (num1 > num2) {
|
||||
return 1
|
||||
} else if (num1 < num2) {
|
||||
return -1
|
||||
}
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
Component({
|
||||
properties: {
|
||||
canvasId: {
|
||||
type: String,
|
||||
value: 'ec-canvas'
|
||||
},
|
||||
|
||||
ec: {
|
||||
type: Object
|
||||
},
|
||||
|
||||
forceUseOldCanvas: {
|
||||
type: Boolean,
|
||||
value: false
|
||||
}
|
||||
},
|
||||
|
||||
data: {
|
||||
isUseNewCanvas: false
|
||||
},
|
||||
|
||||
ready: function () {
|
||||
// Disable prograssive because drawImage doesn't support DOM as parameter
|
||||
// See https://developers.weixin.qq.com/miniprogram/dev/api/canvas/CanvasContext.drawImage.html
|
||||
echarts.registerPreprocessor(option => {
|
||||
if (option && option.series) {
|
||||
if (option.series.length > 0) {
|
||||
option.series.forEach(series => {
|
||||
series.progressive = 0;
|
||||
});
|
||||
}
|
||||
else if (typeof option.series === 'object') {
|
||||
option.series.progressive = 0;
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
if (!this.data.ec) {
|
||||
console.warn('组件需绑定 ec 变量，例：<ec-canvas id="mychart-dom-bar" '
|
||||
+ 'canvas-id="mychart-bar" ec="{{ ec }}"></ec-canvas>');
|
||||
return;
|
||||
}
|
||||
|
||||
if (!this.data.ec.lazyLoad) {
|
||||
this.init();
|
||||
}
|
||||
},
|
||||
|
||||
methods: {
|
||||
init: function (callback) {
|
||||
const version = wx.getSystemInfoSync().SDKVersion
|
||||
|
||||
const canUseNewCanvas = compareVersion(version, '2.9.0') >= 0;
|
||||
const forceUseOldCanvas = this.data.forceUseOldCanvas;
|
||||
const isUseNewCanvas = canUseNewCanvas && !forceUseOldCanvas;
|
||||
this.setData({ isUseNewCanvas });
|
||||
|
||||
if (forceUseOldCanvas && canUseNewCanvas) {
|
||||
console.warn('开发者强制使用旧canvas,建议关闭');
|
||||
}
|
||||
|
||||
if (isUseNewCanvas) {
|
||||
// 2.9.0 可以使用 <canvas type="2d"></canvas>
|
||||
this.initByNewWay(callback);
|
||||
} else {
|
||||
const isValid = compareVersion(version, '1.9.91') >= 0
|
||||
if (!isValid) {
|
||||
console.error('微信基础库版本过低，需大于等于 1.9.91。'
|
||||
+ '参见：https://github.com/ecomfe/echarts-for-weixin'
|
||||
+ '#%E5%BE%AE%E4%BF%A1%E7%89%88%E6%9C%AC%E8%A6%81%E6%B1%82');
|
||||
return;
|
||||
} else {
|
||||
console.warn('建议将微信基础库调整大于等于2.9.0版本。升级后绘图将有更好性能');
|
||||
this.initByOldWay(callback);
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
initByOldWay(callback) {
|
||||
// 1.9.91 <= version < 2.9.0：原来的方式初始化
|
||||
ctx = wx.createCanvasContext(this.data.canvasId, this);
|
||||
const canvas = new WxCanvas(ctx, this.data.canvasId, false);
|
||||
|
||||
echarts.setCanvasCreator(() => {
|
||||
return canvas;
|
||||
});
|
||||
// const canvasDpr = wx.getSystemInfoSync().pixelRatio // 微信旧的canvas不能传入dpr
|
||||
const canvasDpr = 1
|
||||
var query = wx.createSelectorQuery().in(this);
|
||||
query.select('.ec-canvas').boundingClientRect(res => {
|
||||
if (typeof callback === 'function') {
|
||||
this.chart = callback(canvas, res.width, res.height, canvasDpr);
|
||||
}
|
||||
else if (this.data.ec && typeof this.data.ec.onInit === 'function') {
|
||||
this.chart = this.data.ec.onInit(canvas, res.width, res.height, canvasDpr);
|
||||
}
|
||||
else {
|
||||
this.triggerEvent('init', {
|
||||
canvas: canvas,
|
||||
width: res.width,
|
||||
height: res.height,
|
||||
canvasDpr: canvasDpr // 增加了dpr，可方便外面echarts.init
|
||||
});
|
||||
}
|
||||
}).exec();
|
||||
},
|
||||
|
||||
initByNewWay(callback) {
|
||||
// version >= 2.9.0：使用新的方式初始化
|
||||
const query = wx.createSelectorQuery().in(this)
|
||||
query
|
||||
.select('.ec-canvas')
|
||||
.fields({ node: true, size: true })
|
||||
.exec(res => {
|
||||
const canvasNode = res[0].node
|
||||
this.canvasNode = canvasNode
|
||||
|
||||
const canvasDpr = wx.getSystemInfoSync().pixelRatio
|
||||
const canvasWidth = res[0].width
|
||||
const canvasHeight = res[0].height
|
||||
|
||||
const ctx = canvasNode.getContext('2d')
|
||||
|
||||
const canvas = new WxCanvas(ctx, this.data.canvasId, true, canvasNode)
|
||||
echarts.setCanvasCreator(() => {
|
||||
return canvas
|
||||
})
|
||||
|
||||
if (typeof callback === 'function') {
|
||||
this.chart = callback(canvas, canvasWidth, canvasHeight, canvasDpr)
|
||||
} else if (this.data.ec && typeof this.data.ec.onInit === 'function') {
|
||||
this.chart = this.data.ec.onInit(canvas, canvasWidth, canvasHeight, canvasDpr)
|
||||
} else {
|
||||
this.triggerEvent('init', {
|
||||
canvas: canvas,
|
||||
width: canvasWidth,
|
||||
height: canvasHeight,
|
||||
dpr: canvasDpr
|
||||
})
|
||||
}
|
||||
})
|
||||
},
|
||||
canvasToTempFilePath(opt) {
|
||||
if (this.data.isUseNewCanvas) {
|
||||
// 新版
|
||||
const query = wx.createSelectorQuery().in(this)
|
||||
query
|
||||
.select('.ec-canvas')
|
||||
.fields({ node: true, size: true })
|
||||
.exec(res => {
|
||||
const canvasNode = res[0].node
|
||||
opt.canvas = canvasNode
|
||||
wx.canvasToTempFilePath(opt)
|
||||
})
|
||||
} else {
|
||||
// 旧的
|
||||
if (!opt.canvasId) {
|
||||
opt.canvasId = this.data.canvasId;
|
||||
}
|
||||
ctx.draw(true, () => {
|
||||
wx.canvasToTempFilePath(opt, this);
|
||||
});
|
||||
}
|
||||
},
|
||||
|
||||
touchStart(e) {
|
||||
if (this.chart && e.touches.length > 0) {
|
||||
var touch = e.touches[0];
|
||||
var handler = this.chart.getZr().handler;
|
||||
handler.dispatch('mousedown', {
|
||||
zrX: touch.x,
|
||||
zrY: touch.y
|
||||
});
|
||||
handler.dispatch('mousemove', {
|
||||
zrX: touch.x,
|
||||
zrY: touch.y
|
||||
});
|
||||
handler.processGesture(wrapTouch(e), 'start');
|
||||
}
|
||||
},
|
||||
|
||||
touchMove(e) {
|
||||
if (this.chart && e.touches.length > 0) {
|
||||
var touch = e.touches[0];
|
||||
var handler = this.chart.getZr().handler;
|
||||
handler.dispatch('mousemove', {
|
||||
zrX: touch.x,
|
||||
zrY: touch.y
|
||||
});
|
||||
handler.processGesture(wrapTouch(e), 'change');
|
||||
}
|
||||
},
|
||||
|
||||
touchEnd(e) {
|
||||
if (this.chart) {
|
||||
const touch = e.changedTouches ? e.changedTouches[0] : {};
|
||||
var handler = this.chart.getZr().handler;
|
||||
handler.dispatch('mouseup', {
|
||||
zrX: touch.x,
|
||||
zrY: touch.y
|
||||
});
|
||||
handler.dispatch('click', {
|
||||
zrX: touch.x,
|
||||
zrY: touch.y
|
||||
});
|
||||
handler.processGesture(wrapTouch(e), 'end');
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
|
||||
function wrapTouch(event) {
|
||||
for (let i = 0; i < event.touches.length; ++i) {
|
||||
const touch = event.touches[i];
|
||||
touch.offsetX = touch.x;
|
||||
touch.offsetY = touch.y;
|
||||
}
|
||||
return event;
|
||||
}
|
||||
Reference in New Issue
Block a user