'修改图表样式'

ec-canvas/ec-canvas.js

+import WxCanvas from './wx-canvas';
+import * as echarts from './echarts.min.js';
+
+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) {
+        // console.log('微信基础库版本大于2.9.0，开始使用<canvas type="2d"/>');
+        // 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;
+}
\ No newline at end of file

ec-canvas/ec-canvas.json

+{
+  "component": true,
+  "usingComponents": {}
+}
\ No newline at end of file

ec-canvas/ec-canvas.wxml

+<!-- 新的：接口对其了H5 -->
+<canvas wx:if="{{isUseNewCanvas}}" type="2d" class="ec-canvas" canvas-id="{{ canvasId }}" bindinit="init" bindtouchstart="{{ ec.disableTouch ? '' : 'touchStart' }}" bindtouchmove="{{ ec.disableTouch ? '' : 'touchMove' }}" bindtouchend="{{ ec.disableTouch ? '' : 'touchEnd' }}"></canvas>
+<!-- 旧的 -->
+<canvas wx:else class="ec-canvas" canvas-id="{{ canvasId }}" bindinit="init" bindtouchstart="{{ ec.disableTouch ? '' : 'touchStart' }}" bindtouchmove="{{ ec.disableTouch ? '' : 'touchMove' }}" bindtouchend="{{ ec.disableTouch ? '' : 'touchEnd' }}"></canvas>
\ No newline at end of file

ec-canvas/ec-canvas.wxss

+.ec-canvas {
+  width: 100%;
+  height: 100%;
+}
\ No newline at end of file

ec-canvas/wx-canvas.js

+export default class WxCanvas {
+  constructor(ctx, canvasId, isNew, canvasNode) {
+    this.ctx = ctx;
+    this.canvasId = canvasId;
+    this.chart = null;
+    this.isNew = isNew
+    if (isNew) {
+      this.canvasNode = canvasNode;
+    }
+    else {
+      this._initStyle(ctx);
+    }
+
+    // this._initCanvas(zrender, ctx);
+
+    this._initEvent();
+  }
+
+  getContext(contextType) {
+    if (contextType === '2d') {
+      return this.ctx;
+    }
+  }
+
+  // canvasToTempFilePath(opt) {
+  //   if (!opt.canvasId) {
+  //     opt.canvasId = this.canvasId;
+  //   }
+  //   return wx.canvasToTempFilePath(opt, this);
+  // }
+
+  setChart(chart) {
+    this.chart = chart;
+  }
+
+  attachEvent() {
+    // noop
+  }
+
+  detachEvent() {
+    // noop
+  }
+
+  _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);
+    });
+  }
+
+  _initStyle(ctx) {
+    var styles = ['fillStyle', 'strokeStyle', 'globalAlpha',
+      'textAlign', 'textBaseAlign', 'shadow', 'lineWidth',
+      'lineCap', 'lineJoin', 'lineDash', 'miterLimit', 'fontSize'];
+
+    styles.forEach(style => {
+      Object.defineProperty(ctx, style, {
+        set: value => {
+          if (style !== 'fillStyle' && style !== 'strokeStyle'
+            || value !== 'none' && value !== null
+          ) {
+            ctx['set' + style.charAt(0).toUpperCase() + style.slice(1)](value);
+          }
+        }
+      });
+    });
+
+    ctx.createRadialGradient = () => {
+      return ctx.createCircularGradient(arguments);
+    };
+  }
+
+  _initEvent() {
+    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) {
+    if (this.canvasNode) this.canvasNode.width = w
+  }
+  set height(h) {
+    if (this.canvasNode) this.canvasNode.height = h
+  }
+
+  get width() {
+    if (this.canvasNode)
+      return this.canvasNode.width
+    return 0
+  }
+  get height() {
+    if (this.canvasNode)
+      return this.canvasNode.height
+    return 0
+  }
+}
\ No newline at end of file

package-lock.json

-{
-  "requires": true,
-  "lockfileVersion": 1,
-  "dependencies": {
-    "@vant/weapp": {
-      "version": "1.0.7",
-      "resolved": "https://registry.npmjs.org/@vant/weapp/-/weapp-1.0.7.tgz",
-      "integrity": "sha512-F7gkcVKLTh4Pt17ukZnpZmn78CbtfmUtxSZif02ysyXZmqtAf1aAUffL3i1y+qzGWCXF4y/OVkOBVQVrKHI4MA=="
-    },
-    "vant-weapp": {
-      "version": "0.5.27",
-      "resolved": "https://registry.npmjs.org/vant-weapp/-/vant-weapp-0.5.27.tgz",
-      "integrity": "sha512-wmbpPWbpIk/Nl022Yfu0LNV+rSBPxnWTsZePVo6De4FxY3SWw47+Ip6rxLgdnG00/FntbymgvVw4xlaW+WmC+Q=="
-    }
-  }
-}

pages/index/performance/performance.js

 const app = getApp()
-let Charts = require('../../../utils/wxcharts-min.js');
-var lineChart = null;
-import {Base} from '../../../utils/base.js';
+import {
+    Base
+} from '../../../utils/base.js';
 const base = new Base()
+import * as echarts from '../../../ec-canvas/echarts.min.js';
+let chartLine;
 Page({
     data: {
         windowWidth: '',
         windowHeight: '',
-        coach : '',
+        coach: '',
         scoreList: [],
-        coachcomment:'',
+        coachcomment: '',
         awardList: [],
-        arr1: [],
-        arr2:[],
-        class_id:'',
-        lesson_id :'',
-        child_id :'',
-        class_single_id : ''
+        class_id: '',
+        lesson_id: '',
+        child_id: '',
+        class_single_id: '',
+        ec: {
+            onInit: function (canvas, width, height) {
+                chartLine = echarts.init(canvas, null, {
+                    width: width,
+                    height: height
+                });
+                canvas.setChart(chartLine);
+            }
+        }
     },
     onLoad: function (options) {
-        console.log(options)
         this.setData({
-            class_id : options.class_id,
-            lesson_id : options.lesson_id,
-            child_id : options.child_id,
-            class_single_id : options.class_single_id
+            coach_id: app.globalData.coach_id,
+            class_id: options.class_id,
+            lesson_id: options.lesson_id,
+            child_id: options.child_id,
+            class_single_id: options.class_single_id
         })
-        console.log(options.class_single_id)
-        this.getRpx()
         this.getcomment()
         this.getbadges()
     },
-    getRpx() {
-        var res = wx.getSystemInfoSync();    //试图获取屏幕宽高数据
-        this.setData({
-            windowWidth: res.windowWidth / 750 * 690 ,
-            windowHeight: res.windowWidth / 750 * 605
-        })
-    },
-    getCharts() {
-        lineChart = new Charts({
-            canvasId: 'radarCanvas',
-            type: 'radar',
-            categories: this.data.arr1,
-            legend: false,
-            series: [{
-                data: this.data.arr2,
-            }],
-            width: this.data.windowWidth,
-            height: this.data.windowHeight,
-            extra: {
-                radar: {
-                    max: 150
-                }
-            }
-        });
-    },
-    getcomment : function () {
+    getcomment: function () {
         let params = {
             url: 'coach/comment',
-            data:{
-                coach_id : 5,
-                class_id : this.data.class_id,
-                lesson_id : this.data.lesson_id,
-                child_id : this.data.child_id,
+            data: {
+                coach_id: this.data.coach_id,
+                class_id: this.data.class_id,
+                lesson_id: this.data.lesson_id,
+                child_id: this.data.child_id,
             },
-            callback : (data) => {
+            callback: (data) => {
                 console.log(data)
                 this.setData({
-                    coach : data.coach,
-                    coachcomment : data,
-                    scoreList : data.comment_score,
+                    coach: data.coach,
+                    coachcomment: data,
+                    scoreList: data.comment_score,
                 })
                 var arrs = [];
-                var newArrs =[];
-                for(var i = 0 ; i<this.data.scoreList.length; i++) {
-                    // console.log(this.data.scoreList)
-                    arrs.push(this.data.scoreList[i].comment_norm.name)
-                    // console.log(arrs)
+                var newArrs = [];
+                for (var i = 0; i < this.data.scoreList.length; i++) {
+                    let option = {
+                        name: this.data.scoreList[i].comment_norm.name + ' ' + this.data.scoreList[i].score,
+                        max: 100
+                    }
+                    arrs.push(option)
                     newArrs.push(this.data.scoreList[i].score)
-                    // console.log(newArrs)  
                 }
-                this.setData({
-                    arr1:arrs,
-                    arr2: newArrs
-                })
-                console.log(this.data.arr1)
-                console.log(this.data.arr2)
-                this.getCharts()
+                this.getOption(arrs, newArrs)
             },
         }
         base.newRequest(params)
     },
-    getbadges : function () {
+    getOption(xData, data_cur) {
+        var option = {
+            backgroundColor: "#ffffff",
+            color: ["#00E2BB"],
+            xAxis: {
+                show: false
+            },
+            yAxis: {
+                show: false
+            },
+            radar: {
+                shape: 'circle',
+                splitNumber: 4, // 分割段数
+                indicator: xData, // 数据
+                textStyle: {
+                    borderColor: '#00E2BB',
+                    borderWidth: 2
+                },
+                name: { // 文本样式
+                    textStyle: {
+                        color: '#1A1A1A',
+                        fontSize: 12
+                    }
+                },
+                axisLine: { //配置雷达图的射线样式颜色
+                    lineStyle: {
+                        color: '#E0E0E0',
+                        width: 1
+                    },
+                },
+                splitLine: { // 分割线样式
+                    lineStyle: {
+                        color: '#E0E0E0',
+                        width: 1,
+                        type: 'dashed'
+                    },
+                },
+                splitArea: { // 分割区域样式
+                    areaStyle: {
+                        color: ['#fff']
+                    }
+                },
+            },
+            series: [{
+                type: 'radar',
+                data: [{
+                    value: data_cur
+                }],
+                itemStyle: { //此属性的颜色和下面areaStyle属性的颜色都设置成相同色即可实现
+                    color: '#00E2BB',
+                    borderColor: '#00E2BB'
+                },
+                lineStyle: { // 线条样式
+                    width: 2
+                },
+                symbol: 'circle', // 拐点的样式，还可以取值'rect','angle'等
+                symbolSize: 4, // 拐点的大小
+                areaStyle: { // 覆盖区域颜色
+                    color: {
+                        type: 'linear',
+                        x: 0,
+                        y: 0,
+                        x2: 0,
+                        y2: 1,
+                        colorStops: [
+                            {
+                                offset: 0,
+                                color: '#00E24A'
+                            }, 
+                            {
+                                offset: 1,
+                                color: '#00E3BC' // 100% 处的颜色
+                            }
+                        ]
+                    }
+                },
+    
+            }]
+        };
+        chartLine.setOption(option);
+    },
+    getbadges: function () {
         let params = {
             url: 'badges',
-            data : {
-                user_child_id : this.data.child_id,
-                class_id : this.data.class_id ,
-                class_single_id : this.data.class_single_id,
+            data: {
+                user_child_id: this.data.child_id,
+                class_id: this.data.class_id,
+                class_single_id: this.data.class_single_id,
             },
-            callback : (data) =>{
-                console.log(data)
+            callback: (data) => {
                 this.setData({
-                    awardList : data
+                    awardList: data
                 })
             }
         }

pages/index/performance/performance.json

 {
-  "usingComponents": {},
+  "usingComponents": {
+    "ec-canvas": "../../../ec-canvas/ec-canvas"
+  },
   "navigationBarTitleText": "运动评价"
 }
\ No newline at end of file

pages/index/performance/performance.wxml

 <view class="top">
 	<view class="title">运动表现</view>
 	<view class="canvasbox">
-		<canvas canvas-id="radarCanvas" disable-scroll="true" class="canvas"></canvas>
+		<ec-canvas id="mychart" class="canvas" canvas-id="mychart-bar" ec="{{ ec }}"></ec-canvas>
 	</view>
 </view>
 <view class="one">

pages/index/performance/performance.wxss

+.container {
+  width: 100%;
+  height: 500rpx;
+}
+ec-canvas {
+  width: 100%;
+  height: 100%;
+}
+
+
 page {
   background: #F7F8FA;
   padding: 20rpx 30rpx 60rpx 30rpx;