385 lines
8.3 KiB
JavaScript
385 lines
8.3 KiB
JavaScript
const cacheChart = {}
|
||
const fontSizeReg = /([\d\.]+)px/;
|
||
class EventEmit {
|
||
constructor() {
|
||
this.__events = {};
|
||
}
|
||
on(type, listener) {
|
||
if (!type || !listener) {
|
||
return;
|
||
}
|
||
const events = this.__events[type] || [];
|
||
events.push(listener);
|
||
this.__events[type] = events;
|
||
}
|
||
emit(type, e) {
|
||
if (type.constructor === Object) {
|
||
e = type;
|
||
type = e && e.type;
|
||
}
|
||
if (!type) {
|
||
return;
|
||
}
|
||
const events = this.__events[type];
|
||
if (!events || !events.length) {
|
||
return;
|
||
}
|
||
events.forEach((listener) => {
|
||
listener.call(this, e);
|
||
});
|
||
}
|
||
off(type, listener) {
|
||
const __events = this.__events;
|
||
const events = __events[type];
|
||
if (!events || !events.length) {
|
||
return;
|
||
}
|
||
if (!listener) {
|
||
delete __events[type];
|
||
return;
|
||
}
|
||
for (let i = 0, len = events.length; i < len; i++) {
|
||
if (events[i] === listener) {
|
||
events.splice(i, 1);
|
||
i--;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
class Image {
|
||
constructor() {
|
||
this.currentSrc = null
|
||
this.naturalHeight = 0
|
||
this.naturalWidth = 0
|
||
this.width = 0
|
||
this.height = 0
|
||
this.tagName = 'IMG'
|
||
}
|
||
set src(src) {
|
||
this.currentSrc = src
|
||
uni.getImageInfo({
|
||
src,
|
||
success: (res) => {
|
||
this.naturalWidth = this.width = res.width
|
||
this.naturalHeight = this.height = res.height
|
||
this.onload()
|
||
},
|
||
fail: () => {
|
||
this.onerror()
|
||
}
|
||
})
|
||
}
|
||
get src() {
|
||
return this.currentSrc
|
||
}
|
||
}
|
||
class OffscreenCanvas {
|
||
constructor(ctx, com, canvasId) {
|
||
this.tagName = 'canvas'
|
||
this.com = com
|
||
this.canvasId = canvasId
|
||
this.ctx = ctx
|
||
}
|
||
set width(w) {
|
||
this.com.offscreenWidth = w
|
||
}
|
||
set height(h) {
|
||
this.com.offscreenHeight = h
|
||
}
|
||
get width() {
|
||
return this.com.offscreenWidth || 0
|
||
}
|
||
get height() {
|
||
return this.com.offscreenHeight || 0
|
||
}
|
||
getContext(type) {
|
||
return this.ctx
|
||
}
|
||
getImageData() {
|
||
return new Promise((resolve, reject) => {
|
||
this.com.$nextTick(() => {
|
||
uni.canvasGetImageData({
|
||
x:0,
|
||
y:0,
|
||
width: this.com.offscreenWidth,
|
||
height: this.com.offscreenHeight,
|
||
canvasId: this.canvasId,
|
||
success: (res) => {
|
||
resolve(res)
|
||
},
|
||
fail: (err) => {
|
||
reject(err)
|
||
},
|
||
}, this.com)
|
||
})
|
||
})
|
||
}
|
||
}
|
||
export class Canvas {
|
||
constructor(ctx, com, isNew, canvasNode={}) {
|
||
cacheChart[com.canvasId] = {ctx}
|
||
this.canvasId = com.canvasId;
|
||
this.chart = null;
|
||
this.isNew = isNew
|
||
this.tagName = 'canvas'
|
||
this.canvasNode = canvasNode;
|
||
this.com = com;
|
||
if (!isNew) {
|
||
this._initStyle(ctx)
|
||
}
|
||
this._initEvent();
|
||
this._ee = new EventEmit()
|
||
}
|
||
getContext(type) {
|
||
if (type === '2d') {
|
||
return this.ctx;
|
||
}
|
||
}
|
||
setAttribute(key, value) {
|
||
if(key === 'aria-label') {
|
||
this.com['ariaLabel'] = value
|
||
}
|
||
}
|
||
setChart(chart) {
|
||
this.chart = chart;
|
||
}
|
||
createOffscreenCanvas(param){
|
||
if(!this.children) {
|
||
this.com.isOffscreenCanvas = true
|
||
this.com.offscreenWidth = param.width||300
|
||
this.com.offscreenHeight = param.height||300
|
||
const com = this.com
|
||
const canvasId = this.com.offscreenCanvasId
|
||
const context = uni.createCanvasContext(canvasId, this.com)
|
||
this._initStyle(context)
|
||
this.children = new OffscreenCanvas(context, com, canvasId)
|
||
}
|
||
return this.children
|
||
}
|
||
appendChild(child) {
|
||
console.log('child', child)
|
||
}
|
||
dispatchEvent(type, e) {
|
||
if(typeof type == 'object') {
|
||
this._ee.emit(type.type, type);
|
||
} else {
|
||
this._ee.emit(type, e);
|
||
}
|
||
return true
|
||
}
|
||
attachEvent() {
|
||
}
|
||
detachEvent() {
|
||
}
|
||
addEventListener(type, listener) {
|
||
this._ee.on(type, listener)
|
||
}
|
||
removeEventListener(type, listener) {
|
||
this._ee.off(type, listener)
|
||
}
|
||
_initCanvas(zrender, ctx) {
|
||
// zrender.util.getContext = function() {
|
||
// return ctx;
|
||
// };
|
||
// zrender.util.$override('measureText', function(text, font) {
|
||
// ctx.font = font || '12px sans-serif';
|
||
// return ctx.measureText(text, font);
|
||
// });
|
||
}
|
||
_initStyle(ctx, child) {
|
||
const styles = [
|
||
'fillStyle',
|
||
'strokeStyle',
|
||
'fontSize',
|
||
'globalAlpha',
|
||
'opacity',
|
||
'textAlign',
|
||
'textBaseline',
|
||
'shadow',
|
||
'lineWidth',
|
||
'lineCap',
|
||
'lineJoin',
|
||
'lineDash',
|
||
'miterLimit',
|
||
// 'font'
|
||
];
|
||
const colorReg = /#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])\b/g;
|
||
styles.forEach(style => {
|
||
Object.defineProperty(ctx, style, {
|
||
set: value => {
|
||
// if (style === 'font' && fontSizeReg.test(value)) {
|
||
// const match = fontSizeReg.exec(value);
|
||
// ctx.setFontSize(match[1]);
|
||
// return;
|
||
// }
|
||
if (style === 'opacity') {
|
||
ctx.setGlobalAlpha(value)
|
||
return;
|
||
}
|
||
if (style !== 'fillStyle' && style !== 'strokeStyle' || value !== 'none' && value !== null) {
|
||
// #ifdef H5 || APP-PLUS || MP-BAIDU
|
||
if(typeof value == 'object') {
|
||
if (value.hasOwnProperty('colorStop') || value.hasOwnProperty('colors')) {
|
||
ctx['set' + style.charAt(0).toUpperCase() + style.slice(1)](value);
|
||
}
|
||
return
|
||
}
|
||
// #endif
|
||
// #ifdef MP-TOUTIAO
|
||
if(colorReg.test(value)) {
|
||
value = value.replace(colorReg, '#$1$1$2$2$3$3')
|
||
}
|
||
// #endif
|
||
ctx['set' + style.charAt(0).toUpperCase() + style.slice(1)](value);
|
||
}
|
||
}
|
||
});
|
||
});
|
||
if(!this.isNew && !child) {
|
||
ctx.uniDrawImage = ctx.drawImage
|
||
ctx.drawImage = (...a) => {
|
||
a[0] = a[0].src
|
||
ctx.uniDrawImage(...a)
|
||
}
|
||
}
|
||
if(!ctx.createRadialGradient) {
|
||
ctx.createRadialGradient = function() {
|
||
return ctx.createCircularGradient(...[...arguments].slice(-3))
|
||
};
|
||
}
|
||
// 字节不支持
|
||
if (!ctx.strokeText) {
|
||
ctx.strokeText = (...a) => {
|
||
ctx.fillText(...a)
|
||
}
|
||
}
|
||
// 钉钉不支持
|
||
if (!ctx.measureText) {
|
||
const strLen = (str) => {
|
||
let len = 0;
|
||
for (let i = 0; i < str.length; i++) {
|
||
if (str.charCodeAt(i) > 0 && str.charCodeAt(i) < 128) {
|
||
len++;
|
||
} else {
|
||
len += 2;
|
||
}
|
||
}
|
||
return len;
|
||
}
|
||
ctx.measureText = (text, font) => {
|
||
let fontSize = ctx?.state?.fontSize || 12;
|
||
if (font) {
|
||
fontSize = parseInt(font.match(/([\d\.]+)px/)[1])
|
||
}
|
||
fontSize /= 2;
|
||
let isBold = fontSize >= 16;
|
||
const widthFactor = isBold ? 1.3 : 1;
|
||
return {
|
||
width: strLen(text) * fontSize * widthFactor
|
||
};
|
||
}
|
||
}
|
||
}
|
||
|
||
_initEvent(e) {
|
||
this.event = {};
|
||
const eventNames = [{
|
||
wxName: 'touchStart',
|
||
ecName: 'mousedown'
|
||
}, {
|
||
wxName: 'touchMove',
|
||
ecName: 'mousemove'
|
||
}, {
|
||
wxName: 'touchEnd',
|
||
ecName: 'mouseup'
|
||
}, {
|
||
wxName: 'touchEnd',
|
||
ecName: 'click'
|
||
}];
|
||
|
||
eventNames.forEach(name => {
|
||
this.event[name.wxName] = e => {
|
||
const touch = e.touches[0];
|
||
this.chart.getZr().handler.dispatch(name.ecName, {
|
||
zrX: name.wxName === 'tap' ? touch.clientX : touch.x,
|
||
zrY: name.wxName === 'tap' ? touch.clientY : touch.y
|
||
});
|
||
};
|
||
});
|
||
}
|
||
|
||
set width(w) {
|
||
this.canvasNode.width = w
|
||
}
|
||
set height(h) {
|
||
this.canvasNode.height = h
|
||
}
|
||
|
||
get width() {
|
||
return this.canvasNode.width || 0
|
||
}
|
||
get height() {
|
||
return this.canvasNode.height || 0
|
||
}
|
||
get ctx() {
|
||
return cacheChart[this.canvasId]['ctx'] || null
|
||
}
|
||
set chart(chart) {
|
||
cacheChart[this.canvasId]['chart'] = chart
|
||
}
|
||
get chart() {
|
||
return cacheChart[this.canvasId]['chart'] || null
|
||
}
|
||
}
|
||
|
||
export function dispatch(name, {x,y, wheelDelta}) {
|
||
this.dispatch(name, {
|
||
zrX: x,
|
||
zrY: y,
|
||
zrDelta: wheelDelta,
|
||
preventDefault: () => {},
|
||
stopPropagation: () =>{}
|
||
});
|
||
}
|
||
export function setCanvasCreator(echarts, {canvas, node}) {
|
||
// echarts.setCanvasCreator(() => canvas);
|
||
if(echarts && !echarts.registerPreprocessor) {
|
||
return console.warn('echarts 版本不对或未传入echarts，vue3请使用esm格式')
|
||
}
|
||
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;
|
||
}
|
||
}
|
||
});
|
||
function loadImage(src, onload, onerror) {
|
||
let img = null
|
||
if(node && node.createImage) {
|
||
img = node.createImage()
|
||
img.onload = onload.bind(img);
|
||
img.onerror = onerror.bind(img);
|
||
img.src = src;
|
||
return img
|
||
} else {
|
||
img = new Image()
|
||
img.onload = onload.bind(img)
|
||
img.onerror = onerror.bind(img);
|
||
img.src = src
|
||
return img
|
||
}
|
||
}
|
||
if(echarts.setPlatformAPI) {
|
||
echarts.setPlatformAPI({
|
||
loadImage: canvas.setChart ? loadImage : null,
|
||
createCanvas(){
|
||
const key = 'createOffscreenCanvas'
|
||
return uni.canIUse(key) && uni[key] ? uni[key]({type: '2d'}) : canvas
|
||
}
|
||
})
|
||
}
|
||
} |