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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: 14, 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 calValidDistance(distance, chartData, config, opts) { var dataChartAreaWidth = opts.width - config.padding - chartData.xAxisPoints[0]; var dataChartWidth = chartData.eachSpacing * opts.categories.length; var validDistance = distance; if (distance >= 0) { validDistance = 0; } else if (Math.abs(distance) >= dataChartWidth - dataChartAreaWidth) { validDistance = dataChartAreaWidth - dataChartWidth; } return validDistance; } function isInAngleRange(angle, startAngle, endAngle) { function adjust(angle) { while (angle < 0) { angle += 2 * Math.PI; } while (angle > 2 * Math.PI) { angle -= 2 * Math.PI; } return angle; } angle = adjust(angle); startAngle = adjust(startAngle); endAngle = adjust(endAngle); if (startAngle > endAngle) { endAngle += 2 * Math.PI; if (angle < startAngle) { angle += 2 * Math.PI; } } return angle >= startAngle && angle <= endAngle; } 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) { function isNotMiddlePoint(points, i) { if (points[i - 1] && points[i + 1]) { return points[i].y >= Math.max(points[i - 1].y, points[i + 1].y) || points[i].y <= Math.min(points[i - 1].y, points[i + 1].y); } else { return false; } } 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; } // fix issue https://github.com/xiaolin3303/wx-charts/issues/79 if (isNotMiddlePoint(points, i + 1)) { pBy = points[i + 1].y; } if (isNotMiddlePoint(points, i)) { pAy = points[i].y; } 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.forEa