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/* * charts for WeChat small app v1.0 * * https://github.com/xiaolin3303/wx-charts * 2016-11-28 * * Designed and built with all the love of Web */ 'use strict'; var config = { yAxisWidth: 15, yAxisSplit: 5, xAxisHeight: 15, xAxisLineHeight: 15, legendHeight: 15, yAxisTitleWidth: 15, padding: 12, columePadding: 3, fontSize: 10, dataPointShape: ['diamond', 'circle', 'triangle', 'rect'], colors: ['#7cb5ec', '#f7a35c', '#434348', '#90ed7d', '#f15c80', '#8085e9'], pieChartLinePadding: 25, pieChartTextPadding: 15, xAxisTextPadding: 3, titleColor: '#333333', titleFontSize: 20, subtitleColor: '#999999', subtitleFontSize: 15, toolTipPadding: 3, toolTipBackground: '#000000', toolTipOpacity: 0.7, toolTipLineHeight: 14, radarGridCount: 3, radarLabelTextMargin: 15 }; // Object.assign polyfill // https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign function assign(target, varArgs) { if (target == null) { // TypeError if undefined or null throw new TypeError('Cannot convert undefined or null to object'); } var to = Object(target); for (var index = 1; index < arguments.length; index++) { var nextSource = arguments[index]; if (nextSource != null) { // Skip over if undefined or null for (var nextKey in nextSource) { // Avoid bugs when hasOwnProperty is shadowed if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) { to[nextKey] = nextSource[nextKey]; } } } } return to; } var util = { toFixed: function toFixed(num, limit) { limit = limit || 2; if (this.isFloat(num)) { num = num.toFixed(limit); } return num; }, isFloat: function isFloat(num) { return num % 1 !== 0; }, approximatelyEqual: function approximatelyEqual(num1, num2) { return Math.abs(num1 - num2) < 1e-10; }, isSameSign: function isSameSign(num1, num2) { return Math.abs(num1) === num1 && Math.abs(num2) === num2 || Math.abs(num1) !== num1 && Math.abs(num2) !== num2; }, isSameXCoordinateArea: function isSameXCoordinateArea(p1, p2) { return this.isSameSign(p1.x, p2.x); }, isCollision: function isCollision(obj1, obj2) { obj1.end = {}; obj1.end.x = obj1.start.x + obj1.width; obj1.end.y = obj1.start.y - obj1.height; obj2.end = {}; obj2.end.x = obj2.start.x + obj2.width; obj2.end.y = obj2.start.y - obj2.height; var flag = obj2.start.x > obj1.end.x || obj2.end.x < obj1.start.x || obj2.end.y > obj1.start.y || obj2.start.y < obj1.end.y; return !flag; } }; function findRange(num, type, limit) { if (isNaN(num)) { throw new Error('[wxCharts] unvalid series data!'); } limit = limit || 10; type = type ? type : 'upper'; var multiple = 1; while (limit < 1) { limit *= 10; multiple *= 10; } if (type === 'upper') { num = Math.ceil(num * multiple); } else { num = Math.floor(num * multiple); } while (num % limit !== 0) { if (type === 'upper') { num++; } else { num--; } } return num / multiple; } function calRotateTranslate(x, y, h) { var xv = x; var yv = h - y; var transX = xv + (h - yv - xv) / Math.sqrt(2); transX *= -1; var transY = (h - yv) * (Math.sqrt(2) - 1) - (h - yv - xv) / Math.sqrt(2); return { transX: transX, transY: transY }; } function createCurveControlPoints(points, i) { var a = 0.2; var b = 0.2; var pAx = null; var pAy = null; var pBx = null; var pBy = null; if (i < 1) { pAx = points[0].x + (points[1].x - points[0].x) * a; pAy = points[0].y + (points[1].y - points[0].y) * a; } else { pAx = points[i].x + (points[i + 1].x - points[i - 1].x) * a; pAy = points[i].y + (points[i + 1].y - points[i - 1].y) * a; } if (i > points.length - 3) { var last = points.length - 1; pBx = points[last].x - (points[last].x - points[last - 1].x) * b; pBy = points[last].y - (points[last].y - points[last - 1].y) * b; } else { pBx = points[i + 1].x - (points[i + 2].x - points[i].x) * b; pBy = points[i + 1].y - (points[i + 2].y - points[i].y) * b; } return { ctrA: { x: pAx, y: pAy }, ctrB: { x: pBx, y: pBy } }; } function convertCoordinateOrigin(x, y, center) { return { x: center.x + x, y: center.y - y }; } function avoidCollision(obj, target) { if (target) { // is collision test while (util.isCollision(obj, target)) { if (obj.start.x > 0) { obj.start.y--; } else if (obj.start.x < 0) { obj.start.y++; } else { if (obj.start.y > 0) { obj.start.y++; } else { obj.start.y--; } } } } return obj; } function fillSeriesColor(series, config) { var index = 0; return series.map(function (item) { if (!item.color) { item.color = config.colors[index]; index = (index + 1) % config.colors.length; } return item; }); } function getDataRange(minData, maxData) { var limit = 0; var range = maxData - minData; if (range >= 10000) { limit = 1000; } else if (range >= 1000) { limit = 100; } else if (range >= 100) { limit = 10; } else if (range >= 10) { limit = 5; } else if (range >= 1) { limit = 1; } else if (range >= 0.1) { limit = 0.1; } else { limit = 0.01; } return { minRange: findRange(minData, 'lower', limit), maxRange: findRange(maxData, 'upper', limit) }; } function measureText(text) { var fontSize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10; // wx canvas 未实现measureText方法, 此处自行实现 text = String(text); var text = text.split(''); var width = 0; text.forEach(function (item) { if (/[a-zA-Z]/.test(item)) { width += 7; } else if (/[0-9]/.test(item)) { width += 5.5; } else if (/\./.test(item)) { width += 2.7; } else if (/-/.test(item)) { width += 3.25; } else if (/[\u4e00-\u9fa5]/.test(item)) { width += 10; } else if (/\(|\)/.test(item)) { width += 3.73; } else if (/\s/.test(item)) { width += 2.5; } else if (/%/.test(item)) { width += 8; } else { width += 10; } }); return width * fontSize / 10; } function dataCombine(series) { return series.reduce(function (a, b) { return (a.data ? a.data : a).concat(b.data); }, []); } function getSeriesDataItem(series, index) { var data = []; series.forEach(function (item) { if (item.data[index] !== null && typeof item.data[index] !== 'undefinded') { var seriesItem = {}; seriesItem.color = item.color; seriesItem.name = item.name; seriesItem.data = item.format ? item.format(item.data[index]) : item.data[index]; data.push(seriesItem); } }); return data; } function getMaxTextListLength(list) { var lengthList = list.map(function (item) { return measureText(item); }); return Math.max.apply(null, lengthList); } function getRadarCoordinateSeries(length) { var eachAngle = 2 * Math.PI / length; var CoordinateSeries = []; for (var i = 0; i < length; i++) { CoordinateSeries.push(eachAngle