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1260 lines
42 KiB
1260 lines
42 KiB
/*
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* charts for WeChat small app v1.0
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*
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* https://github.com/xiaolin3303/wx-charts
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* 2016-11-28
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*
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* Designed and built with all the love of Web
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*/
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'use strict';
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var config = {
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yAxisWidth: 15,
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yAxisSplit: 5,
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xAxisHeight: 15,
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xAxisLineHeight: 15,
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legendHeight: 15,
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yAxisTitleWidth: 15,
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padding: 12,
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columePadding: 3,
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fontSize: 10,
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dataPointShape: ['diamond', 'circle', 'triangle', 'rect'],
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colors: ['#7cb5ec', '#f7a35c', '#434348', '#90ed7d', '#f15c80', '#8085e9'],
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pieChartLinePadding: 25,
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pieChartTextPadding: 15,
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xAxisTextPadding: 3,
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titleColor: '#333333',
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titleFontSize: 20,
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subtitleColor: '#999999',
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subtitleFontSize: 15,
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toolTipPadding: 3,
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toolTipBackground: '#000000',
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toolTipOpacity: 0.7,
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toolTipLineHeight: 14,
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radarGridCount: 3,
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radarLabelTextMargin: 15
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};
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// Object.assign polyfill
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// https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
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function assign(target, varArgs) {
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if (target == null) {
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// TypeError if undefined or null
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throw new TypeError('Cannot convert undefined or null to object');
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}
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var to = Object(target);
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for (var index = 1; index < arguments.length; index++) {
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var nextSource = arguments[index];
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if (nextSource != null) {
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// Skip over if undefined or null
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for (var nextKey in nextSource) {
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// Avoid bugs when hasOwnProperty is shadowed
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if (Object.prototype.hasOwnProperty.call(nextSource, nextKey)) {
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to[nextKey] = nextSource[nextKey];
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}
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}
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}
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}
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return to;
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}
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var util = {
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toFixed: function toFixed(num, limit) {
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limit = limit || 2;
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if (this.isFloat(num)) {
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num = num.toFixed(limit);
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}
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return num;
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},
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isFloat: function isFloat(num) {
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return num % 1 !== 0;
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},
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approximatelyEqual: function approximatelyEqual(num1, num2) {
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return Math.abs(num1 - num2) < 1e-10;
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},
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isSameSign: function isSameSign(num1, num2) {
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return Math.abs(num1) === num1 && Math.abs(num2) === num2 || Math.abs(num1) !== num1 && Math.abs(num2) !== num2;
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},
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isSameXCoordinateArea: function isSameXCoordinateArea(p1, p2) {
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return this.isSameSign(p1.x, p2.x);
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},
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isCollision: function isCollision(obj1, obj2) {
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obj1.end = {};
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obj1.end.x = obj1.start.x + obj1.width;
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obj1.end.y = obj1.start.y - obj1.height;
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obj2.end = {};
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obj2.end.x = obj2.start.x + obj2.width;
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obj2.end.y = obj2.start.y - obj2.height;
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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;
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return !flag;
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}
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};
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function findRange(num, type, limit) {
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if (isNaN(num)) {
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throw new Error('[wxCharts] unvalid series data!');
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}
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limit = limit || 10;
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type = type ? type : 'upper';
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var multiple = 1;
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while (limit < 1) {
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limit *= 10;
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multiple *= 10;
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}
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if (type === 'upper') {
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num = Math.ceil(num * multiple);
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} else {
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num = Math.floor(num * multiple);
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}
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while (num % limit !== 0) {
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if (type === 'upper') {
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num++;
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} else {
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num--;
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}
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}
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return num / multiple;
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}
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function calValidDistance(distance, chartData, config, opts) {
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var dataChartAreaWidth = opts.width - config.padding - chartData.xAxisPoints[0];
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var dataChartWidth = chartData.eachSpacing * opts.categories.length;
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var validDistance = distance;
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if (distance >= 0) {
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validDistance = 0;
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} else if (Math.abs(distance) >= dataChartWidth - dataChartAreaWidth) {
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validDistance = dataChartAreaWidth - dataChartWidth;
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}
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return validDistance;
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}
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function calRotateTranslate(x, y, h) {
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var xv = x;
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var yv = h - y;
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var transX = xv + (h - yv - xv) / Math.sqrt(2);
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transX *= -1;
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var transY = (h - yv) * (Math.sqrt(2) - 1) - (h - yv - xv) / Math.sqrt(2);
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return {
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transX: transX,
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transY: transY
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};
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}
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function createCurveControlPoints(points, i) {
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function isNotMiddlePoint(points, i) {
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if (points[i - 1] && points[i + 1]) {
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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);
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} else {
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return false;
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}
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}
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var a = 0.2;
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var b = 0.2;
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var pAx = null;
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var pAy = null;
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var pBx = null;
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var pBy = null;
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if (i < 1) {
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pAx = points[0].x + (points[1].x - points[0].x) * a;
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pAy = points[0].y + (points[1].y - points[0].y) * a;
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} else {
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pAx = points[i].x + (points[i + 1].x - points[i - 1].x) * a;
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pAy = points[i].y + (points[i + 1].y - points[i - 1].y) * a;
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}
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if (i > points.length - 3) {
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var last = points.length - 1;
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pBx = points[last].x - (points[last].x - points[last - 1].x) * b;
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pBy = points[last].y - (points[last].y - points[last - 1].y) * b;
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} else {
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pBx = points[i + 1].x - (points[i + 2].x - points[i].x) * b;
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pBy = points[i + 1].y - (points[i + 2].y - points[i].y) * b;
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}
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// fix issue https://github.com/xiaolin3303/wx-charts/issues/79
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if (isNotMiddlePoint(points, i + 1)) {
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pBy = points[i + 1].y;
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}
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if (isNotMiddlePoint(points, i)) {
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pAy = points[i].y;
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}
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return {
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ctrA: { x: pAx, y: pAy },
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ctrB: { x: pBx, y: pBy }
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};
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}
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function fillSeriesColor(series, config) {
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var index = 0;
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return series.map(function (item) {
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if (!item.color) {
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item.color = config.colors[index];
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index = (index + 1) % config.colors.length;
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}
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return item;
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});
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}
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function getDataRange(minData, maxData) {
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var limit = 0;
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var range = maxData - minData;
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if (range >= 10000) {
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limit = 1000;
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} else if (range >= 1000) {
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limit = 100;
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} else if (range >= 100) {
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limit = 10;
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} else if (range >= 10) {
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limit = 5;
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} else if (range >= 1) {
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limit = 1;
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} else if (range >= 0.1) {
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limit = 0.1;
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} else {
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limit = 0.01;
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}
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return {
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minRange: findRange(minData, 'lower', limit),
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maxRange: findRange(maxData, 'upper', limit)
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};
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}
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function measureText(text) {
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var fontSize = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 10;
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// wx canvas 未实现measureText方法, 此处自行实现
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text = String(text);
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var text = text.split('');
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var width = 0;
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text.forEach(function (item) {
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if (/[a-zA-Z]/.test(item)) {
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width += 7;
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} else if (/[0-9]/.test(item)) {
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width += 5.5;
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} else if (/\./.test(item)) {
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width += 2.7;
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} else if (/-/.test(item)) {
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width += 3.25;
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} else if (/[\u4e00-\u9fa5]/.test(item)) {
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width += 10;
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} else if (/\(|\)/.test(item)) {
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width += 3.73;
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} else if (/\s/.test(item)) {
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width += 2.5;
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} else if (/%/.test(item)) {
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width += 8;
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} else {
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width += 10;
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}
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});
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return width * fontSize / 10;
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}
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function dataCombine(series) {
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return series.reduce(function (a, b) {
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return (a.data ? a.data : a).concat(b.data);
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}, []);
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}
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function getSeriesDataItem(series, index) {
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var data = [];
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series.forEach(function (item) {
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if (item.data[index] !== null && typeof item.data[index] !== 'undefinded') {
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var seriesItem = {};
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seriesItem.color = item.color;
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seriesItem.name = item.name;
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seriesItem.data = item.format ? item.format(item.data[index]) : item.data[index];
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data.push(seriesItem);
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}
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});
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return data;
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}
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function getToolTipData(seriesData, calPoints, index, categories) {
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var option = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};
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var textList = seriesData.map(function (item) {
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return {
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text: option.format ? option.format(item, categories[index]) : item.name + ': ' + item.data,
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color: item.color
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};
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});
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var validCalPoints = [];
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var offset = {
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x: 0,
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y: 0
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};
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calPoints.forEach(function (points) {
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if (typeof points[index] !== 'undefinded' && points[index] !== null) {
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validCalPoints.push(points[index]);
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}
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});
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validCalPoints.forEach(function (item) {
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offset.x = Math.round(item.x);
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offset.y += item.y;
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});
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offset.y /= validCalPoints.length;
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return { textList: textList, offset: offset };
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}
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function findCurrentIndex(currentPoints, xAxisPoints, opts, config) {
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var offset = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 0;
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var currentIndex = -1;
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if (isInExactChartArea(currentPoints, opts, config)) {
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xAxisPoints.forEach(function (item, index) {
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if (currentPoints.x + offset > item) {
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currentIndex = index;
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}
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});
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}
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return currentIndex;
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}
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function isInExactChartArea(currentPoints, opts, config) {
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return currentPoints.x < opts.width - config.padding && currentPoints.x > config.padding + config.yAxisWidth + config.yAxisTitleWidth && currentPoints.y > config.padding && currentPoints.y < opts.height - config.legendHeight - config.xAxisHeight - config.padding;
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}
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function splitPoints(points) {
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var newPoints = [];
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var items = [];
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points.forEach(function (item, index) {
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if (item !== null) {
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items.push(item);
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} else {
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if (items.length) {
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newPoints.push(items);
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}
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items = [];
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}
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});
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if (items.length) {
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newPoints.push(items);
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}
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return newPoints;
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}
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function calLegendData(series, opts, config) {
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if (opts.legend === false) {
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return {
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legendList: [],
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legendHeight: 0
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};
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}
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var padding = 5;
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var marginTop = 8;
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var shapeWidth = 15;
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var legendList = [];
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var widthCount = 0;
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var currentRow = [];
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series.forEach(function (item) {
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var itemWidth = 3 * padding + shapeWidth + measureText(item.name || 'undefinded');
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if (widthCount + itemWidth > opts.width) {
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legendList.push(currentRow);
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widthCount = itemWidth;
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currentRow = [item];
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} else {
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widthCount += itemWidth;
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currentRow.push(item);
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}
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});
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if (currentRow.length) {
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legendList.push(currentRow);
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}
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return {
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legendList: legendList,
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legendHeight: legendList.length * (config.fontSize + marginTop) + padding
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}
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}
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function calCategoriesData(categories, opts, config) {
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var result = {
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angle: 0,
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xAxisHeight: config.xAxisHeight
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};
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var _getXAxisPoints = getXAxisPoints(categories, opts, config),
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eachSpacing = _getXAxisPoints.eachSpacing;
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// get max length of categories text
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var categoriesTextLenth = categories.map(function (item) {
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return measureText(item);
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});
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var maxTextLength = Math.max.apply(this, categoriesTextLenth);
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if (maxTextLength + 2 * config.xAxisTextPadding > eachSpacing) {
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result.angle = 45 * Math.PI / 180;
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result.xAxisHeight = 2 * config.xAxisTextPadding + maxTextLength * Math.sin(result.angle);
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}
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return result;
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}
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function getXAxisPoints(categories, opts, config) {
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var yAxisTotalWidth = config.yAxisWidth + config.yAxisTitleWidth
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var spacingValid = opts.width - 2 * config.padding - yAxisTotalWidth
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var dataCount = opts.enableScroll ? Math.min(5, categories.length) : categories.length
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var eachSpacing = spacingValid / dataCount
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var xAxisPoints = []
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var startX = config.padding + yAxisTotalWidth
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var endX = opts.width - config.padding
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categories.forEach(function (item, index) {
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xAxisPoints.push(startX + index * eachSpacing)
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});
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if (opts.enableScroll === true) {
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xAxisPoints.push(startX + categories.length * eachSpacing)
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} else {
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xAxisPoints.push(endX)
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}
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return { xAxisPoints: xAxisPoints, startX: startX, endX: endX, eachSpacing: eachSpacing };
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}
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function getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config) {
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var process = arguments.length > 7 && arguments[7] !== undefined ? arguments[7] : 1
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var points = []
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var validHeight = opts.height - 2 * config.padding - config.xAxisHeight - config.legendHeight
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data.forEach(function (item, index) {
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if (item === null) {
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points.push(null)
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} else {
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var point = {}
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point.x = xAxisPoints[index] + Math.round(eachSpacing / 2);
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var height = validHeight * (item - minRange) / (maxRange - minRange)
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height *= process
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point.y = opts.height - config.xAxisHeight - config.legendHeight - Math.round(height) - config.padding
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points.push(point)
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}
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})
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return points
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}
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function getYAxisTextList(series, opts, config) {
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var data = dataCombine(series);
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// remove null from data
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data = data.filter(function (item) {
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return item !== null;
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});
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var minData = Math.min.apply(this, data)
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var maxData = Math.max.apply(this, data)
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if (typeof opts.yAxis.min === 'number') {
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minData = Math.min(opts.yAxis.min, minData);
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}
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if (typeof opts.yAxis.max === 'number') {
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maxData = Math.max(opts.yAxis.max, maxData);
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}
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// fix issue https://github.com/xiaolin3303/wx-charts/issues/9
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if (minData === maxData) {
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var rangeSpan = maxData || 1;
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minData -= rangeSpan;
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maxData += rangeSpan;
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}
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var dataRange = getDataRange(minData, maxData);
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var minRange = dataRange.minRange;
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var maxRange = dataRange.maxRange;
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var range = [];
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var eachRange = (maxRange - minRange) / config.yAxisSplit;
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for (var i = 0; i <= config.yAxisSplit; i++) {
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range.push(minRange + eachRange * i);
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}
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return range.reverse();
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}
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function calYAxisData(series, opts, config) {
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var ranges = getYAxisTextList(series, opts, config);
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var yAxisWidth = config.yAxisWidth;
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var rangesFormat = ranges.map(function (item) {
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item = util.toFixed(item, 2);
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item = opts.yAxis.format ? opts.yAxis.format(Number(item)) : item;
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yAxisWidth = Math.max(yAxisWidth, measureText(item) + 5);
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return item;
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});
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if (opts.yAxis.disabled === true) {
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yAxisWidth = 0;
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}
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return { rangesFormat: rangesFormat, ranges: ranges, yAxisWidth: yAxisWidth };
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}
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function drawPointShape(points, color, shape, context) {
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context.beginPath();
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context.setStrokeStyle("#ffffff");
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context.setLineWidth(1);
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context.setFillStyle(color);
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|
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if (shape === 'diamond') {
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points.forEach(function (item, index) {
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if (item !== null) {
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context.moveTo(item.x, item.y - 4.5);
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context.lineTo(item.x - 4.5, item.y);
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context.lineTo(item.x, item.y + 4.5);
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context.lineTo(item.x + 4.5, item.y);
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context.lineTo(item.x, item.y - 4.5);
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}
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|
});
|
|
} else if (shape === 'circle') {
|
|
points.forEach(function (item, index) {
|
|
if (item !== null) {
|
|
context.moveTo(item.x + 3.5, item.y);
|
|
context.arc(item.x, item.y, 4, 0, 2 * Math.PI, false);
|
|
}
|
|
});
|
|
} else if (shape === 'rect') {
|
|
points.forEach(function (item, index) {
|
|
if (item !== null) {
|
|
context.moveTo(item.x - 3.5, item.y - 3.5);
|
|
context.rect(item.x - 3.5, item.y - 3.5, 7, 7);
|
|
}
|
|
});
|
|
} else if (shape === 'triangle') {
|
|
points.forEach(function (item, index) {
|
|
if (item !== null) {
|
|
context.moveTo(item.x, item.y - 4.5);
|
|
context.lineTo(item.x - 4.5, item.y + 4.5);
|
|
context.lineTo(item.x + 4.5, item.y + 4.5);
|
|
context.lineTo(item.x, item.y - 4.5);
|
|
}
|
|
});
|
|
}
|
|
context.closePath();
|
|
context.fill();
|
|
context.stroke();
|
|
}
|
|
|
|
function drawPointText(points, series, config, context) {
|
|
// 绘制数据文案
|
|
var data = series.data;
|
|
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle('#666666');
|
|
points.forEach(function (item, index) {
|
|
if (item !== null && item.dataLabel) {
|
|
var formatVal = series.format ? series.format(data[index]) : data[index];
|
|
context.fillText(formatVal, item.x - measureText(formatVal) / 2, item.y - 2);
|
|
}
|
|
});
|
|
context.closePath();
|
|
context.stroke();
|
|
}
|
|
|
|
function drawToolTipSplitLine(offsetX, opts, config, context) {
|
|
var startY = config.padding;
|
|
var endY = opts.height - config.padding - config.xAxisHeight - config.legendHeight;
|
|
context.beginPath();
|
|
context.setStrokeStyle('#cccccc');
|
|
context.setLineWidth(1);
|
|
context.moveTo(offsetX, startY);
|
|
context.lineTo(offsetX, endY);
|
|
context.stroke();
|
|
context.closePath();
|
|
}
|
|
|
|
function drawToolTip(textList, offset, opts, config, context) {
|
|
var legendWidth = 4;
|
|
var legendMarginRight = 5;
|
|
var arrowWidth = 8;
|
|
var isOverRightBorder = false;
|
|
offset = assign({
|
|
x: 0,
|
|
y: 0
|
|
}, offset);
|
|
offset.y -= 8;
|
|
var textWidth = textList.map(function (item) {
|
|
return measureText(item.text);
|
|
});
|
|
|
|
var toolTipWidth = legendWidth + legendMarginRight + 4 * config.toolTipPadding + Math.max.apply(null, textWidth);
|
|
var toolTipHeight = 2 * config.toolTipPadding + textList.length * config.toolTipLineHeight;
|
|
|
|
// if beyond the right border
|
|
if (offset.x - Math.abs(opts._scrollDistance_) + arrowWidth + toolTipWidth > opts.width) {
|
|
isOverRightBorder = true;
|
|
}
|
|
|
|
// draw background rect
|
|
context.beginPath();
|
|
context.setFillStyle(opts.tooltip.option.background || config.toolTipBackground);
|
|
context.setGlobalAlpha(config.toolTipOpacity);
|
|
if (isOverRightBorder) {
|
|
context.moveTo(offset.x, offset.y + 10);
|
|
context.lineTo(offset.x - arrowWidth, offset.y + 10 - 5);
|
|
context.lineTo(offset.x - arrowWidth, offset.y + 10 + 5);
|
|
context.moveTo(offset.x, offset.y + 10);
|
|
context.fillRect(offset.x - toolTipWidth - arrowWidth, offset.y, toolTipWidth, toolTipHeight);
|
|
} else {
|
|
context.moveTo(offset.x, offset.y + 10);
|
|
context.lineTo(offset.x + arrowWidth, offset.y + 10 - 5);
|
|
context.lineTo(offset.x + arrowWidth, offset.y + 10 + 5);
|
|
context.moveTo(offset.x, offset.y + 10);
|
|
context.fillRect(offset.x + arrowWidth, offset.y, toolTipWidth, toolTipHeight);
|
|
}
|
|
|
|
context.closePath();
|
|
context.fill();
|
|
context.setGlobalAlpha(1);
|
|
|
|
// draw legend
|
|
textList.forEach(function (item, index) {
|
|
context.beginPath();
|
|
context.setFillStyle(item.color);
|
|
var startX = offset.x + arrowWidth + 2 * config.toolTipPadding;
|
|
var startY = offset.y + (config.toolTipLineHeight - config.fontSize) / 2 + config.toolTipLineHeight * index + config.toolTipPadding;
|
|
if (isOverRightBorder) {
|
|
startX = offset.x - toolTipWidth - arrowWidth + 2 * config.toolTipPadding;
|
|
}
|
|
context.fillRect(startX, startY, legendWidth, config.fontSize);
|
|
context.closePath();
|
|
});
|
|
// draw text list
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle('#ffffff');
|
|
textList.forEach(function (item, index) {
|
|
var startX = offset.x + arrowWidth + 2 * config.toolTipPadding + legendWidth + legendMarginRight;
|
|
if (isOverRightBorder) {
|
|
startX = offset.x - toolTipWidth - arrowWidth + 2 * config.toolTipPadding + +legendWidth + legendMarginRight;
|
|
}
|
|
var startY = offset.y + (config.toolTipLineHeight - config.fontSize) / 2 + config.toolTipLineHeight * index + config.toolTipPadding;
|
|
context.fillText(item.text, startX, startY + config.fontSize);
|
|
});
|
|
context.stroke();
|
|
context.closePath();
|
|
}
|
|
|
|
function drawYAxisTitle(title, opts, config, context) {
|
|
var startX = config.xAxisHeight + (opts.height - config.xAxisHeight - measureText(title)) / 2;
|
|
context.save();
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle(opts.yAxis.titleFontColor || '#333333');
|
|
context.translate(0, opts.height);
|
|
context.rotate(-90 * Math.PI / 180);
|
|
context.fillText(title, startX, config.padding + 0.5 * config.fontSize);
|
|
context.stroke();
|
|
context.closePath();
|
|
context.restore();
|
|
}
|
|
|
|
function drawLineDataPoints(series, opts, config, context) {
|
|
var process = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;
|
|
|
|
var _calYAxisData3 = calYAxisData(series, opts, config),
|
|
ranges = _calYAxisData3.ranges;
|
|
|
|
var _getXAxisPoints3 = getXAxisPoints(opts.categories, opts, config),
|
|
xAxisPoints = _getXAxisPoints3.xAxisPoints,
|
|
eachSpacing = _getXAxisPoints3.eachSpacing;
|
|
|
|
var minRange = ranges.pop();
|
|
var maxRange = ranges.shift();
|
|
var calPoints = [];
|
|
|
|
context.save();
|
|
if (opts._scrollDistance_ && opts._scrollDistance_ !== 0 && opts.enableScroll === true) {
|
|
context.translate(opts._scrollDistance_, 0);
|
|
}
|
|
|
|
if (opts.tooltip && opts.tooltip.textList && opts.tooltip.textList.length && process === 1) {
|
|
drawToolTipSplitLine(opts.tooltip.offset.x, opts, config, context);
|
|
}
|
|
|
|
series.forEach(function (eachSeries, seriesIndex) {
|
|
var data = eachSeries.data;
|
|
var points = getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config, process);
|
|
calPoints.push(points);
|
|
var splitPointList = splitPoints(points);
|
|
|
|
splitPointList.forEach(function (points, index) {
|
|
context.beginPath();
|
|
context.setStrokeStyle(eachSeries.color);
|
|
context.setLineWidth(2);
|
|
if (points.length === 1) {
|
|
context.moveTo(points[0].x, points[0].y);
|
|
context.arc(points[0].x, points[0].y, 1, 0, 2 * Math.PI);
|
|
} else {
|
|
context.moveTo(points[0].x, points[0].y);
|
|
if (opts.extra.lineStyle === 'curve') {
|
|
points.forEach(function (item, index) {
|
|
if (index > 0) {
|
|
var ctrlPoint = createCurveControlPoints(points, index - 1);
|
|
context.bezierCurveTo(ctrlPoint.ctrA.x, ctrlPoint.ctrA.y, ctrlPoint.ctrB.x, ctrlPoint.ctrB.y, item.x, item.y);
|
|
}
|
|
});
|
|
} else {
|
|
points.forEach(function (item, index) {
|
|
if (index > 0) {
|
|
context.lineTo(item.x, item.y);
|
|
}
|
|
});
|
|
}
|
|
context.moveTo(points[0].x, points[0].y);
|
|
}
|
|
context.closePath();
|
|
context.stroke();
|
|
});
|
|
|
|
if (opts.dataPointShape !== false) {
|
|
drawPointShape(points, eachSeries.color, opts.dataPointShape, context);
|
|
}
|
|
});
|
|
if (opts.dataLabel !== false && process === 1) {
|
|
series.forEach(function (eachSeries, seriesIndex) {
|
|
var data = eachSeries.data;
|
|
var points = getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config, process);
|
|
drawPointText(points, eachSeries, config, context);
|
|
});
|
|
}
|
|
|
|
context.restore();
|
|
|
|
return {
|
|
xAxisPoints: xAxisPoints,
|
|
calPoints: calPoints,
|
|
eachSpacing: eachSpacing
|
|
};
|
|
}
|
|
|
|
function drawToolTipBridge(opts, config, context, process) {
|
|
context.save();
|
|
if (opts._scrollDistance_ && opts._scrollDistance_ !== 0 && opts.enableScroll === true) {
|
|
context.translate(opts._scrollDistance_, 0);
|
|
}
|
|
if (opts.tooltip && opts.tooltip.textList && opts.tooltip.textList.length && process === 1) {
|
|
drawToolTip(opts.tooltip.textList, opts.tooltip.offset, opts, config, context);
|
|
}
|
|
context.restore();
|
|
}
|
|
|
|
function drawXAxis(categories, opts, config, context) {
|
|
var _getXAxisPoints4 = getXAxisPoints(categories, opts, config),
|
|
xAxisPoints = _getXAxisPoints4.xAxisPoints,
|
|
startX = _getXAxisPoints4.startX,
|
|
endX = _getXAxisPoints4.endX,
|
|
eachSpacing = _getXAxisPoints4.eachSpacing;
|
|
|
|
var startY = opts.height - config.padding - config.xAxisHeight - config.legendHeight;
|
|
var endY = startY + config.xAxisLineHeight;
|
|
|
|
context.save();
|
|
if (opts._scrollDistance_ && opts._scrollDistance_ !== 0) {
|
|
context.translate(opts._scrollDistance_, 0);
|
|
}
|
|
|
|
context.beginPath();
|
|
context.setStrokeStyle(opts.xAxis.gridColor || "#f3f3f3");
|
|
if (opts.xAxis.disableGrid !== true) {
|
|
if (opts.xAxis.type === 'calibration') {
|
|
xAxisPoints.forEach(function (item, index) {
|
|
if (index > 0) {
|
|
context.moveTo(item - eachSpacing / 2, startY);
|
|
context.lineTo(item - eachSpacing / 2, startY + 4);
|
|
}
|
|
});
|
|
} else {
|
|
xAxisPoints.forEach(function (item, index) {
|
|
context.moveTo(item, startY);
|
|
context.lineTo(item, endY);
|
|
});
|
|
}
|
|
}
|
|
context.closePath();
|
|
context.stroke();
|
|
|
|
// 对X轴列表做抽稀处理
|
|
var validWidth = opts.width - 2 * config.padding - config.yAxisWidth - config.yAxisTitleWidth;
|
|
var maxXAxisListLength = Math.min(categories.length, Math.ceil(validWidth / config.fontSize / 1.5));
|
|
var ratio = Math.ceil(categories.length / maxXAxisListLength);
|
|
|
|
categories = categories.map(function (item, index) {
|
|
return index % ratio !== 0 ? '' : item;
|
|
});
|
|
|
|
if (config._xAxisTextAngle_ === 0) {
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle(opts.xAxis.fontColor || '#666666');
|
|
categories.forEach(function (item, index) {
|
|
var offset = eachSpacing / 2 - measureText(item) / 2;
|
|
context.fillText(item, xAxisPoints[index] + offset, startY + config.fontSize + 5);
|
|
});
|
|
context.closePath();
|
|
context.stroke();
|
|
} else {
|
|
categories.forEach(function (item, index) {
|
|
context.save();
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle(opts.xAxis.fontColor || '#666666');
|
|
var textWidth = measureText(item);
|
|
var offset = eachSpacing / 2 - textWidth;
|
|
|
|
var _calRotateTranslate = calRotateTranslate(xAxisPoints[index] + eachSpacing / 2, startY + config.fontSize / 2 + 5, opts.height),
|
|
transX = _calRotateTranslate.transX,
|
|
transY = _calRotateTranslate.transY;
|
|
|
|
context.rotate(-1 * config._xAxisTextAngle_);
|
|
context.translate(transX, transY);
|
|
context.fillText(item, xAxisPoints[index] + offset, startY + config.fontSize + 5);
|
|
context.closePath();
|
|
context.stroke();
|
|
context.restore();
|
|
});
|
|
}
|
|
|
|
context.restore();
|
|
}
|
|
|
|
function drawYAxisGrid(opts, config, context) {
|
|
var spacingValid = opts.height - 2 * config.padding - config.xAxisHeight - config.legendHeight;
|
|
var eachSpacing = Math.floor(spacingValid / config.yAxisSplit);
|
|
var yAxisTotalWidth = config.yAxisWidth + config.yAxisTitleWidth;
|
|
var startX = config.padding + yAxisTotalWidth;
|
|
var endX = opts.width - config.padding;
|
|
|
|
var points = [];
|
|
for (var i = 0; i < config.yAxisSplit; i++) {
|
|
points.push(config.padding + eachSpacing * i);
|
|
}
|
|
points.push(config.padding + eachSpacing * config.yAxisSplit + 2);
|
|
|
|
context.beginPath();
|
|
context.setStrokeStyle(opts.yAxis.gridColor || "#999999");
|
|
context.setLineWidth(0.2);
|
|
points.forEach(function (item, index) {
|
|
context.moveTo(startX, item);
|
|
context.lineTo(endX, item);
|
|
});
|
|
context.closePath();
|
|
context.stroke();
|
|
}
|
|
|
|
function drawYAxis(series, opts, config, context) {
|
|
if (opts.yAxis.disabled === true) {
|
|
return;
|
|
}
|
|
|
|
var _calYAxisData4 = calYAxisData(series, opts, config),
|
|
rangesFormat = _calYAxisData4.rangesFormat;
|
|
|
|
var yAxisTotalWidth = config.yAxisWidth + config.yAxisTitleWidth;
|
|
|
|
var spacingValid = opts.height - 2 * config.padding - config.xAxisHeight - config.legendHeight;
|
|
var eachSpacing = Math.floor(spacingValid / config.yAxisSplit);
|
|
var startX = config.padding + yAxisTotalWidth;
|
|
var endX = opts.width - config.padding;
|
|
var endY = opts.height - config.padding - config.xAxisHeight - config.legendHeight;
|
|
|
|
// set YAxis background
|
|
context.setFillStyle(opts.background || '#ffffff');
|
|
if (opts._scrollDistance_ < 0) {
|
|
context.fillRect(0, 0, startX, endY + config.xAxisHeight + 5);
|
|
}
|
|
context.fillRect(endX, 0, opts.width, endY + config.xAxisHeight + 5);
|
|
|
|
var points = [];
|
|
for (var i = 0; i <= config.yAxisSplit; i++) {
|
|
points.push(config.padding + eachSpacing * i);
|
|
}
|
|
|
|
context.stroke();
|
|
context.beginPath();
|
|
context.setFontSize(config.fontSize);
|
|
context.setFillStyle(opts.yAxis.fontColor || '#666666');
|
|
rangesFormat.forEach(function (item, index) {
|
|
var pos = points[index] ? points[index] : endY;
|
|
context.fillText(item, config.padding + config.yAxisTitleWidth, pos + config.fontSize / 2);
|
|
});
|
|
context.closePath();
|
|
context.stroke();
|
|
|
|
if (opts.yAxis.title) {
|
|
drawYAxisTitle(opts.yAxis.title, opts, config, context);
|
|
}
|
|
}
|
|
|
|
function drawLegend(series, opts, config, context) {
|
|
if (!opts.legend) {
|
|
return;
|
|
}
|
|
// each legend shape width 15px
|
|
// the spacing between shape and text in each legend is the `padding`
|
|
// each legend spacing is the `padding`
|
|
// legend margin top `config.padding`
|
|
|
|
var _calLegendData = calLegendData(series, opts, config),
|
|
legendList = _calLegendData.legendList;
|
|
|
|
var padding = 5;
|
|
var marginTop = 8;
|
|
var shapeWidth = 15;
|
|
legendList.forEach(function (itemList, listIndex) {
|
|
var width = 0;
|
|
itemList.forEach(function (item) {
|
|
item.name = item.name || 'undefined'
|
|
width += 3 * padding + measureText(item.name) + shapeWidth
|
|
})
|
|
var startX = (opts.width - width) / 2 + padding;
|
|
var startY = opts.height - config.padding - config.legendHeight + listIndex * (config.fontSize + marginTop) + padding + marginTop;
|
|
|
|
context.setFontSize(config.fontSize);
|
|
itemList.forEach(function (item) {
|
|
switch (opts.type) {
|
|
case 'line':
|
|
context.beginPath();
|
|
context.setLineWidth(1);
|
|
context.setStrokeStyle(item.color);
|
|
context.moveTo(startX , startY + 6);
|
|
context.lineTo(startX + 12, startY + 6);
|
|
context.stroke();
|
|
context.closePath();
|
|
// context.beginPath();
|
|
// context.setLineWidth(1);
|
|
// context.setStrokeStyle('#ffffff');
|
|
// context.setFillStyle(item.color);
|
|
// context.moveTo(startX, startY + 5);
|
|
// context.arc(startX, startY + 6, 5, 0, 2 * Math.PI);
|
|
// context.fill();
|
|
// context.stroke();
|
|
// context.closePath();
|
|
break;
|
|
default:
|
|
context.beginPath();
|
|
context.setFillStyle(item.color);
|
|
context.moveTo(startX, startY);
|
|
context.rect(startX, startY, 15, 10);
|
|
context.closePath();
|
|
context.fill();
|
|
}
|
|
startX += padding + shapeWidth;
|
|
context.beginPath();
|
|
context.setFillStyle(opts.extra.legendTextColor || '#333333');
|
|
context.fillText(item.name, startX - 6, startY + 9);
|
|
context.closePath();
|
|
context.stroke();
|
|
startX += measureText(item.name) + 2 * padding;
|
|
});
|
|
})
|
|
}
|
|
|
|
function drawCanvas(opts, context) {
|
|
context.draw();
|
|
}
|
|
|
|
var Timing = {
|
|
easeIn: function easeIn(pos) {
|
|
return Math.pow(pos, 3);
|
|
},
|
|
|
|
easeOut: function easeOut(pos) {
|
|
return Math.pow(pos - 1, 3) + 1;
|
|
},
|
|
|
|
easeInOut: function easeInOut(pos) {
|
|
if ((pos /= 0.5) < 1) {
|
|
return 0.5 * Math.pow(pos, 3);
|
|
} else {
|
|
return 0.5 * (Math.pow(pos - 2, 3) + 2);
|
|
}
|
|
},
|
|
|
|
linear: function linear(pos) {
|
|
return pos;
|
|
}
|
|
};
|
|
|
|
function Animation(opts) {
|
|
this.isStop = false;
|
|
opts.duration = typeof opts.duration === 'undefined' ? 1000 : opts.duration;
|
|
opts.timing = opts.timing || 'linear';
|
|
|
|
var delay = 17;
|
|
|
|
var createAnimationFrame = function createAnimationFrame() {
|
|
if (typeof requestAnimationFrame !== 'undefined') {
|
|
return requestAnimationFrame;
|
|
} else if (typeof setTimeout !== 'undefined') {
|
|
return function (step, delay) {
|
|
setTimeout(function () {
|
|
var timeStamp = +new Date();
|
|
step(timeStamp);
|
|
}, delay);
|
|
};
|
|
} else {
|
|
return function (step) {
|
|
step(null);
|
|
};
|
|
}
|
|
};
|
|
var animationFrame = createAnimationFrame();
|
|
var startTimeStamp = null;
|
|
var _step = function step(timestamp) {
|
|
if (timestamp === null || this.isStop === true) {
|
|
opts.onProcess && opts.onProcess(1);
|
|
opts.onAnimationFinish && opts.onAnimationFinish();
|
|
return;
|
|
}
|
|
if (startTimeStamp === null) {
|
|
startTimeStamp = timestamp;
|
|
}
|
|
if (timestamp - startTimeStamp < opts.duration) {
|
|
var process = (timestamp - startTimeStamp) / opts.duration;
|
|
var timingFunction = Timing[opts.timing];
|
|
process = timingFunction(process);
|
|
opts.onProcess && opts.onProcess(process);
|
|
animationFrame(_step, delay);
|
|
} else {
|
|
opts.onProcess && opts.onProcess(1);
|
|
opts.onAnimationFinish && opts.onAnimationFinish();
|
|
}
|
|
};
|
|
_step = _step.bind(this);
|
|
|
|
animationFrame(_step, delay);
|
|
}
|
|
|
|
// stop animation immediately
|
|
// and tigger onAnimationFinish
|
|
Animation.prototype.stop = function () {
|
|
this.isStop = true;
|
|
};
|
|
|
|
function drawCharts(type, opts, config, context) {
|
|
var _this = this;
|
|
|
|
var series = opts.series;
|
|
var categories = opts.categories;
|
|
series = fillSeriesColor(series, config);
|
|
|
|
var _calLegendData = calLegendData(series, opts, config),
|
|
legendHeight = _calLegendData.legendHeight;
|
|
|
|
config.legendHeight = legendHeight;
|
|
|
|
var _calYAxisData = calYAxisData(series, opts, config),
|
|
yAxisWidth = _calYAxisData.yAxisWidth;
|
|
|
|
config.yAxisWidth = yAxisWidth;
|
|
if (categories && categories.length) {
|
|
var _calCategoriesData = calCategoriesData(categories, opts, config),
|
|
xAxisHeight = _calCategoriesData.xAxisHeight,
|
|
angle = _calCategoriesData.angle;
|
|
|
|
config.xAxisHeight = xAxisHeight;
|
|
config._xAxisTextAngle_ = angle;
|
|
}
|
|
|
|
var duration = opts.animation ? 1000 : 0;
|
|
this.animationInstance && this.animationInstance.stop();
|
|
switch (type) {
|
|
case 'line':
|
|
this.animationInstance = new Animation({
|
|
timing: 'easeIn',
|
|
duration: duration,
|
|
onProcess: function onProcess(process) {
|
|
drawYAxisGrid(opts, config, context);
|
|
|
|
var _drawLineDataPoints = drawLineDataPoints(series, opts, config, context, process),
|
|
xAxisPoints = _drawLineDataPoints.xAxisPoints,
|
|
calPoints = _drawLineDataPoints.calPoints,
|
|
eachSpacing = _drawLineDataPoints.eachSpacing;
|
|
|
|
_this.chartData.xAxisPoints = xAxisPoints;
|
|
_this.chartData.calPoints = calPoints;
|
|
_this.chartData.eachSpacing = eachSpacing;
|
|
drawXAxis(categories, opts, config, context);
|
|
drawLegend(opts.series, opts, config, context);
|
|
drawYAxis(series, opts, config, context);
|
|
drawToolTipBridge(opts, config, context, process);
|
|
drawCanvas(opts, context);
|
|
},
|
|
onAnimationFinish: function onAnimationFinish() {
|
|
_this.event.trigger('renderComplete');
|
|
}
|
|
});
|
|
break;
|
|
}
|
|
}
|
|
|
|
// simple event implement
|
|
|
|
function Event() {
|
|
this.events = {};
|
|
}
|
|
|
|
Event.prototype.addEventListener = function (type, listener) {
|
|
this.events[type] = this.events[type] || [];
|
|
this.events[type].push(listener);
|
|
};
|
|
|
|
Event.prototype.trigger = function () {
|
|
for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
|
|
args[_key] = arguments[_key];
|
|
}
|
|
|
|
var type = args[0];
|
|
var params = args.slice(1);
|
|
if (!!this.events[type]) {
|
|
this.events[type].forEach(function (listener) {
|
|
try {
|
|
listener.apply(null, params);
|
|
} catch (e) {
|
|
console.error(e);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
var Charts = function Charts(opts, _component) {
|
|
opts.title = opts.title || {};
|
|
opts.subtitle = opts.subtitle || {};
|
|
opts.yAxis = opts.yAxis || {};
|
|
opts.xAxis = opts.xAxis || {};
|
|
opts.extra = opts.extra || {};
|
|
opts.legend = opts.legend === false ? false : true;
|
|
opts.animation = opts.animation === false ? false : true;
|
|
var config$$1 = assign({}, config);
|
|
config$$1.yAxisTitleWidth = opts.yAxis.disabled !== true && opts.yAxis.title ? config$$1.yAxisTitleWidth : 0;
|
|
config$$1.pieChartLinePadding = opts.dataLabel === false ? 0 : config$$1.pieChartLinePadding;
|
|
config$$1.pieChartTextPadding = opts.dataLabel === false ? 0 : config$$1.pieChartTextPadding;
|
|
|
|
this.opts = opts;
|
|
this.config = config$$1;
|
|
this.context = _component? wx.createCanvasContext(opts.canvasId, _component) : wx.createCanvasContext(opts.canvasId);
|
|
// store calcuated chart data
|
|
// such as chart point coordinate
|
|
this.chartData = {};
|
|
this.event = new Event();
|
|
this.scrollOption = {
|
|
currentOffset: 0,
|
|
startTouchX: 0,
|
|
distance: 0
|
|
};
|
|
drawCharts.call(this, opts.type, opts, config$$1, this.context);
|
|
}
|
|
|
|
Charts.prototype.updateData = function () {
|
|
var data = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
|
|
|
|
this.opts.series = data.series || this.opts.series;
|
|
this.opts.categories = data.categories || this.opts.categories;
|
|
|
|
this.opts.title = assign({}, this.opts.title, data.title || {});
|
|
this.opts.subtitle = assign({}, this.opts.subtitle, data.subtitle || {});
|
|
|
|
drawCharts.call(this, this.opts.type, this.opts, this.config, this.context);
|
|
};
|
|
|
|
Charts.prototype.stopAnimation = function () {
|
|
this.animationInstance && this.animationInstance.stop();
|
|
};
|
|
|
|
Charts.prototype.addEventListener = function (type, listener) {
|
|
this.event.addEventListener(type, listener);
|
|
};
|
|
|
|
Charts.prototype.getCurrentDataIndex = function (e) {
|
|
var touches = e.touches && e.touches.length ? e.touches : e.changedTouches;
|
|
if (touches && touches.length) {
|
|
var _touches$ = touches[0],
|
|
x = _touches$.x,
|
|
y = _touches$.y;
|
|
return findCurrentIndex({ x: x, y: y }, this.chartData.xAxisPoints, this.opts, this.config, Math.abs(this.scrollOption.currentOffset));
|
|
}
|
|
return -1;
|
|
};
|
|
|
|
Charts.prototype.showToolTip = function (e) {
|
|
var option = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
|
|
|
|
if (this.opts.type === 'line' || this.opts.type === 'area') {
|
|
var index = this.getCurrentDataIndex(e);
|
|
var currentOffset = this.scrollOption.currentOffset;
|
|
|
|
var opts = assign({}, this.opts, {
|
|
_scrollDistance_: currentOffset,
|
|
animation: false
|
|
});
|
|
if (index > -1) {
|
|
var seriesData = getSeriesDataItem(this.opts.series, index);
|
|
if (seriesData.length === 0) {
|
|
drawCharts.call(this, opts.type, opts, this.config, this.context);
|
|
} else {
|
|
var _getToolTipData = getToolTipData(seriesData, this.chartData.calPoints, index, this.opts.categories, option),
|
|
textList = _getToolTipData.textList,
|
|
offset = _getToolTipData.offset;
|
|
|
|
opts.tooltip = {
|
|
textList: textList,
|
|
offset: offset,
|
|
option: option
|
|
};
|
|
drawCharts.call(this, opts.type, opts, this.config, this.context);
|
|
}
|
|
} else {
|
|
drawCharts.call(this, opts.type, opts, this.config, this.context);
|
|
}
|
|
}
|
|
};
|
|
|
|
Charts.prototype.scrollStart = function (e) {
|
|
if (e.touches[0] && this.opts.enableScroll === true) {
|
|
this.scrollOption.startTouchX = e.touches[0].x;
|
|
}
|
|
};
|
|
|
|
Charts.prototype.scroll = function (e) {
|
|
// TODO throtting...
|
|
if (e.touches[0] && this.opts.enableScroll === true) {
|
|
var _distance = e.touches[0].x - this.scrollOption.startTouchX;
|
|
var currentOffset = this.scrollOption.currentOffset;
|
|
|
|
var validDistance = calValidDistance(currentOffset + _distance, this.chartData, this.config, this.opts);
|
|
|
|
this.scrollOption.distance = _distance = validDistance - currentOffset;
|
|
var opts = assign({}, this.opts, {
|
|
_scrollDistance_: currentOffset + _distance,
|
|
animation: false
|
|
});
|
|
|
|
drawCharts.call(this, opts.type, opts, this.config, this.context);
|
|
}
|
|
};
|
|
|
|
Charts.prototype.scrollEnd = function (e) {
|
|
if (this.opts.enableScroll === true) {
|
|
var _scrollOption = this.scrollOption,
|
|
currentOffset = _scrollOption.currentOffset,
|
|
distance = _scrollOption.distance;
|
|
|
|
this.scrollOption.currentOffset = currentOffset + distance;
|
|
this.scrollOption.distance = 0;
|
|
}
|
|
};
|
|
|
|
module.exports = Charts;
|