Wed Aug 14 15:13:00 CST 2024 inscode

test/utils/wxcharts.js

+/*
+ * 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 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.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] !== 'undefined') {
+            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 * i);
+    }
+
+    return CoordinateSeries.map(function (item) {
+        return -1 * item + Math.PI / 2;
+    });
+}
+
+function getToolTipData(seriesData, calPoints, index, categories) {
+    var option = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : {};
+
+    var textList = seriesData.map(function (item) {
+        return {
+            text: option.format ? option.format(item, categories[index]) : item.name + ': ' + item.data,
+            color: item.color
+        };
+    });
+    var validCalPoints = [];
+    var offset = {
+        x: 0,
+        y: 0
+    };
+    calPoints.forEach(function (points) {
+        if (typeof points[index] !== 'undefined' && points[index] !== null) {
+            validCalPoints.push(points[index]);
+        }
+    });
+    validCalPoints.forEach(function (item) {
+        offset.x = Math.round(item.x);
+        offset.y += item.y;
+    });
+
+    offset.y /= validCalPoints.length;
+    return { textList: textList, offset: offset };
+}
+
+function findCurrentIndex(currentPoints, xAxisPoints, opts, config) {
+    var offset = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 0;
+
+    var currentIndex = -1;
+    if (isInExactChartArea(currentPoints, opts, config)) {
+        xAxisPoints.forEach(function (item, index) {
+            if (currentPoints.x + offset > item) {
+                currentIndex = index;
+            }
+        });
+    }
+
+    return currentIndex;
+}
+
+function isInExactChartArea(currentPoints, opts, config) {
+    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;
+}
+
+function findRadarChartCurrentIndex(currentPoints, radarData, count) {
+    var eachAngleArea = 2 * Math.PI / count;
+    var currentIndex = -1;
+    if (isInExactPieChartArea(currentPoints, radarData.center, radarData.radius)) {
+        var fixAngle = function fixAngle(angle) {
+            if (angle < 0) {
+                angle += 2 * Math.PI;
+            }
+            if (angle > 2 * Math.PI) {
+                angle -= 2 * Math.PI;
+            }
+            return angle;
+        };
+
+        var angle = Math.atan2(radarData.center.y - currentPoints.y, currentPoints.x - radarData.center.x);
+        angle = -1 * angle;
+        if (angle < 0) {
+            angle += 2 * Math.PI;
+        }
+
+        var angleList = radarData.angleList.map(function (item) {
+            item = fixAngle(-1 * item);
+
+            return item;
+        });
+
+        angleList.forEach(function (item, index) {
+            var rangeStart = fixAngle(item - eachAngleArea / 2);
+            var rangeEnd = fixAngle(item + eachAngleArea / 2);
+            if (rangeEnd < rangeStart) {
+                rangeEnd += 2 * Math.PI;
+            }
+            if (angle >= rangeStart && angle <= rangeEnd || angle + 2 * Math.PI >= rangeStart && angle + 2 * Math.PI <= rangeEnd) {
+                currentIndex = index;
+            }
+        });
+    }
+
+    return currentIndex;
+}
+
+function findPieChartCurrentIndex(currentPoints, pieData) {
+    var currentIndex = -1;
+    if (isInExactPieChartArea(currentPoints, pieData.center, pieData.radius)) {
+        var angle = Math.atan2(pieData.center.y - currentPoints.y, currentPoints.x - pieData.center.x);
+        angle = -angle;
+        for (var i = 0, len = pieData.series.length; i < len; i++) {
+            var item = pieData.series[i];
+            if (isInAngleRange(angle, item._start_, item._start_ + item._proportion_ * 2 * Math.PI)) {
+                currentIndex = i;
+                break;
+            }
+        }
+    }
+
+    return currentIndex;
+}
+
+function isInExactPieChartArea(currentPoints, center, radius) {
+    return Math.pow(currentPoints.x - center.x, 2) + Math.pow(currentPoints.y - center.y, 2) <= Math.pow(radius, 2);
+}
+
+function splitPoints(points) {
+    var newPoints = [];
+    var items = [];
+    points.forEach(function (item, index) {
+        if (item !== null) {
+            items.push(item);
+        } else {
+            if (items.length) {
+                newPoints.push(items);
+            }
+            items = [];
+        }
+    });
+    if (items.length) {
+        newPoints.push(items);
+    }
+
+    return newPoints;
+}
+
+function calLegendData(series, opts, config) {
+    if (opts.legend === false) {
+        return {
+            legendList: [],
+            legendHeight: 0
+        };
+    }
+    var padding = 5;
+    var marginTop = 8;
+    var shapeWidth = 15;
+    var legendList = [];
+    var widthCount = 0;
+    var currentRow = [];
+    series.forEach(function (item) {
+        var itemWidth = 3 * padding + shapeWidth + measureText(item.name || 'undefined');
+        if (widthCount + itemWidth > opts.width) {
+            legendList.push(currentRow);
+            widthCount = itemWidth;
+            currentRow = [item];
+        } else {
+            widthCount += itemWidth;
+            currentRow.push(item);
+        }
+    });
+    if (currentRow.length) {
+        legendList.push(currentRow);
+    }
+
+    return {
+        legendList: legendList,
+        legendHeight: legendList.length * (config.fontSize + marginTop) + padding
+    };
+}
+
+function calCategoriesData(categories, opts, config) {
+    var result = {
+        angle: 0,
+        xAxisHeight: config.xAxisHeight
+    };
+
+    var _getXAxisPoints = getXAxisPoints(categories, opts, config),
+        eachSpacing = _getXAxisPoints.eachSpacing;
+
+    // get max length of categories text
+
+
+    var categoriesTextLenth = categories.map(function (item) {
+        return measureText(item);
+    });
+
+    var maxTextLength = Math.max.apply(this, categoriesTextLenth);
+
+    if (maxTextLength + 2 * config.xAxisTextPadding > eachSpacing) {
+        result.angle = 45 * Math.PI / 180;
+        result.xAxisHeight = 2 * config.xAxisTextPadding + maxTextLength * Math.sin(result.angle);
+    }
+
+    return result;
+}
+
+function getRadarDataPoints(angleList, center, radius, series, opts) {
+    var process = arguments.length > 5 && arguments[5] !== undefined ? arguments[5] : 1;
+
+    var radarOption = opts.extra.radar || {};
+    radarOption.max = radarOption.max || 0;
+    var maxData = Math.max(radarOption.max, Math.max.apply(null, dataCombine(series)));
+
+    var data = [];
+    series.forEach(function (each) {
+        var listItem = {};
+        listItem.color = each.color;
+        listItem.data = [];
+        each.data.forEach(function (item, index) {
+            var tmp = {};
+            tmp.angle = angleList[index];
+
+            tmp.proportion = item / maxData;
+            tmp.position = convertCoordinateOrigin(radius * tmp.proportion * process * Math.cos(tmp.angle), radius * tmp.proportion * process * Math.sin(tmp.angle), center);
+            listItem.data.push(tmp);
+        });
+
+        data.push(listItem);
+    });
+
+    return data;
+}
+
+function getPieDataPoints(series) {
+    var process = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 1;
+
+    var count = 0;
+    var _start_ = 0;
+    series.forEach(function (item) {
+        item.data = item.data === null ? 0 : item.data;
+        count += item.data;
+    });
+    series.forEach(function (item) {
+        item.data = item.data === null ? 0 : item.data;
+        item._proportion_ = item.data / count * process;
+    });
+    series.forEach(function (item) {
+        item._start_ = _start_;
+        _start_ += 2 * item._proportion_ * Math.PI;
+    });
+
+    return series;
+}
+
+function getPieTextMaxLength(series) {
+    series = getPieDataPoints(series);
+    var maxLength = 0;
+    series.forEach(function (item) {
+        var text = item.format ? item.format(+item._proportion_.toFixed(2)) : util.toFixed(item._proportion_ * 100) + '%';
+        maxLength = Math.max(maxLength, measureText(text));
+    });
+
+    return maxLength;
+}
+
+function fixColumeData(points, eachSpacing, columnLen, index, config, opts) {
+    return points.map(function (item) {
+        if (item === null) {
+            return null;
+        }
+        item.width = (eachSpacing - 2 * config.columePadding) / columnLen;
+
+        if (opts.extra.column && opts.extra.column.width && +opts.extra.column.width > 0) {
+            // customer column width
+            item.width = Math.min(item.width, +opts.extra.column.width);
+        } else {
+            // default width should less tran 25px
+            // don't ask me why, I don't know
+            item.width = Math.min(item.width, 25);
+        }
+        item.x += (index + 0.5 - columnLen / 2) * item.width;
+
+        return item;
+    });
+}
+
+function getXAxisPoints(categories, opts, config) {
+    var yAxisTotalWidth = config.yAxisWidth + config.yAxisTitleWidth;
+    var spacingValid = opts.width - 2 * config.padding - yAxisTotalWidth;
+    var dataCount = opts.enableScroll ? Math.min(5, categories.length) : categories.length;
+    var eachSpacing = spacingValid / dataCount;
+
+    var xAxisPoints = [];
+    var startX = config.padding + yAxisTotalWidth;
+    var endX = opts.width - config.padding;
+    categories.forEach(function (item, index) {
+        xAxisPoints.push(startX + index * eachSpacing);
+    });
+    if (opts.enableScroll === true) {
+        xAxisPoints.push(startX + categories.length * eachSpacing);
+    } else {
+        xAxisPoints.push(endX);
+    }
+
+    return { xAxisPoints: xAxisPoints, startX: startX, endX: endX, eachSpacing: eachSpacing };
+}
+
+function getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config) {
+    var process = arguments.length > 7 && arguments[7] !== undefined ? arguments[7] : 1;
+
+    var points = [];
+    var validHeight = opts.height - 2 * config.padding - config.xAxisHeight - config.legendHeight;
+    data.forEach(function (item, index) {
+        if (item === null) {
+            points.push(null);
+        } else {
+            var point = {};
+            point.x = xAxisPoints[index] + Math.round(eachSpacing / 2);
+            var height = validHeight * (item - minRange) / (maxRange - minRange);
+            height *= process;
+            point.y = opts.height - config.xAxisHeight - config.legendHeight - Math.round(height) - config.padding;
+            points.push(point);
+        }
+    });
+
+    return points;
+}
+
+function getYAxisTextList(series, opts, config) {
+    var data = dataCombine(series);
+    // remove null from data
+    data = data.filter(function (item) {
+        return item !== null;
+    });
+    var minData = Math.min.apply(this, data);
+    var maxData = Math.max.apply(this, data);
+    if (typeof opts.yAxis.min === 'number') {
+        minData = Math.min(opts.yAxis.min, minData);
+    }
+    if (typeof opts.yAxis.max === 'number') {
+        maxData = Math.max(opts.yAxis.max, maxData);
+    }
+
+    // fix issue https://github.com/xiaolin3303/wx-charts/issues/9
+    if (minData === maxData) {
+        var rangeSpan = maxData || 1;
+        minData -= rangeSpan;
+        maxData += rangeSpan;
+    }
+
+    var dataRange = getDataRange(minData, maxData);
+    var minRange = dataRange.minRange;
+    var maxRange = dataRange.maxRange;
+
+    var range = [];
+    var eachRange = (maxRange - minRange) / config.yAxisSplit;
+
+    for (var i = 0; i <= config.yAxisSplit; i++) {
+        range.push(minRange + eachRange * i);
+    }
+    return range.reverse();
+}
+
+function calYAxisData(series, opts, config) {
+
+    var ranges = getYAxisTextList(series, opts, config);
+    var yAxisWidth = config.yAxisWidth;
+    var rangesFormat = ranges.map(function (item) {
+        item = util.toFixed(item, 2);
+        item = opts.yAxis.format ? opts.yAxis.format(Number(item)) : item;
+        yAxisWidth = Math.max(yAxisWidth, measureText(item) + 5);
+        return item;
+    });
+    if (opts.yAxis.disabled === true) {
+        yAxisWidth = 0;
+    }
+
+    return { rangesFormat: rangesFormat, ranges: ranges, yAxisWidth: yAxisWidth };
+}
+
+function drawPointShape(points, color, shape, context) {
+    context.beginPath();
+    context.setStrokeStyle("#ffffff");
+    context.setLineWidth(1);
+    context.setFillStyle(color);
+
+    if (shape === 'diamond') {
+        points.forEach(function (item, index) {
+            if (item !== null) {
+                context.moveTo(item.x, item.y - 4.5);
+                context.lineTo(item.x - 4.5, item.y);
+                context.lineTo(item.x, item.y + 4.5);
+                context.lineTo(item.x + 4.5, item.y);
+                context.lineTo(item.x, item.y - 4.5);
+            }
+        });
+    } 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 drawRingTitle(opts, config, context) {
+    var titlefontSize = opts.title.fontSize || config.titleFontSize;
+    var subtitlefontSize = opts.subtitle.fontSize || config.subtitleFontSize;
+    var title = opts.title.name || '';
+    var subtitle = opts.subtitle.name || '';
+    var titleFontColor = opts.title.color || config.titleColor;
+    var subtitleFontColor = opts.subtitle.color || config.subtitleColor;
+    var titleHeight = title ? titlefontSize : 0;
+    var subtitleHeight = subtitle ? subtitlefontSize : 0;
+    var margin = 5;
+    if (subtitle) {
+        var textWidth = measureText(subtitle, subtitlefontSize);
+        var startX = (opts.width - textWidth) / 2 + (opts.subtitle.offsetX || 0);
+        var startY = (opts.height - config.legendHeight + subtitlefontSize) / 2;
+        if (title) {
+            startY -= (titleHeight + margin) / 2;
+        }
+        context.beginPath();
+        context.setFontSize(subtitlefontSize);
+        context.setFillStyle(subtitleFontColor);
+        context.fillText(subtitle, startX, startY);
+        context.stroke();
+        context.closePath();
+    }
+    if (title) {
+        var _textWidth = measureText(title, titlefontSize);
+        var _startX = (opts.width - _textWidth) / 2 + (opts.title.offsetX || 0);
+        var _startY = (opts.height - config.legendHeight + titlefontSize) / 2;
+        if (subtitle) {
+            _startY += (subtitleHeight + margin) / 2;
+        }
+        context.beginPath();
+        context.setFontSize(titlefontSize);
+        context.setFillStyle(titleFontColor);
+        context.fillText(title, _startX, _startY);
+        context.stroke();
+        context.closePath();
+    }
+}
+
+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) {
+            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 drawRadarLabel(angleList, radius, centerPosition, opts, config, context) {
+    var radarOption = opts.extra.radar || {};
+    radius += config.radarLabelTextMargin;
+    context.beginPath();
+    context.setFontSize(config.fontSize);
+    context.setFillStyle(radarOption.labelColor || '#666666');
+    angleList.forEach(function (angle, index) {
+        var pos = {
+            x: radius * Math.cos(angle),
+            y: radius * Math.sin(angle)
+        };
+        var posRelativeCanvas = convertCoordinateOrigin(pos.x, pos.y, centerPosition);
+        var startX = posRelativeCanvas.x;
+        var startY = posRelativeCanvas.y;
+        if (util.approximatelyEqual(pos.x, 0)) {
+            startX -= measureText(opts.categories[index] || '') / 2;
+        } else if (pos.x < 0) {
+            startX -= measureText(opts.categories[index] || '');
+        }
+        context.fillText(opts.categories[index] || '', startX, startY + config.fontSize / 2);
+    });
+    context.stroke();
+    context.closePath();
+}
+
+function drawPieText(series, opts, config, context, radius, center) {
+    var lineRadius = radius + config.pieChartLinePadding;
+    var textObjectCollection = [];
+    var lastTextObject = null;
+
+    var seriesConvert = series.map(function (item) {
+        var arc = 2 * Math.PI - (item._start_ + 2 * Math.PI * item._proportion_ / 2);
+        var text = item.format ? item.format(+item._proportion_.toFixed(2)) : util.toFixed(item._proportion_ * 100) + '%';
+        var color = item.color;
+        return { arc: arc, text: text, color: color };
+    });
+    seriesConvert.forEach(function (item) {
+        // line end
+        var orginX1 = Math.cos(item.arc) * lineRadius;
+        var orginY1 = Math.sin(item.arc) * lineRadius;
+
+        // line start
+        var orginX2 = Math.cos(item.arc) * radius;
+        var orginY2 = Math.sin(item.arc) * radius;
+
+        // text start
+        var orginX3 = orginX1 >= 0 ? orginX1 + config.pieChartTextPadding : orginX1 - config.pieChartTextPadding;
+        var orginY3 = orginY1;
+
+        var textWidth = measureText(item.text);
+        var startY = orginY3;
+
+        if (lastTextObject && util.isSameXCoordinateArea(lastTextObject.start, { x: orginX3 })) {
+            if (orginX3 > 0) {
+                startY = Math.min(orginY3, lastTextObject.start.y);
+            } else if (orginX1 < 0) {
+                startY = Math.max(orginY3, lastTextObject.start.y);
+            } else {
+                if (orginY3 > 0) {
+                    startY = Math.max(orginY3, lastTextObject.start.y);
+                } else {
+                    startY = Math.min(orginY3, lastTextObject.start.y);
+                }
+            }
+        }
+
+        if (orginX3 < 0) {
+            orginX3 -= textWidth;
+        }
+
+        var textObject = {
+            lineStart: {
+                x: orginX2,
+                y: orginY2
+            },
+            lineEnd: {
+                x: orginX1,
+                y: orginY1
+            },
+            start: {
+                x: orginX3,
+                y: startY
+            },
+            width: textWidth,
+            height: config.fontSize,
+            text: item.text,
+            color: item.color
+        };
+
+        lastTextObject = avoidCollision(textObject, lastTextObject);
+        textObjectCollection.push(lastTextObject);
+    });
+
+    textObjectCollection.forEach(function (item) {
+        var lineStartPoistion = convertCoordinateOrigin(item.lineStart.x, item.lineStart.y, center);
+        var lineEndPoistion = convertCoordinateOrigin(item.lineEnd.x, item.lineEnd.y, center);
+        var textPosition = convertCoordinateOrigin(item.start.x, item.start.y, center);
+        context.setLineWidth(1);
+        context.setFontSize(config.fontSize);
+        context.beginPath();
+        context.setStrokeStyle(item.color);
+        context.setFillStyle(item.color);
+        context.moveTo(lineStartPoistion.x, lineStartPoistion.y);
+        var curveStartX = item.start.x < 0 ? textPosition.x + item.width : textPosition.x;
+        var textStartX = item.start.x < 0 ? textPosition.x - 5 : textPosition.x + 5;
+        context.quadraticCurveTo(lineEndPoistion.x, lineEndPoistion.y, curveStartX, textPosition.y);
+        context.moveTo(lineStartPoistion.x, lineStartPoistion.y);
+        context.stroke();
+        context.closePath();
+        context.beginPath();
+        context.moveTo(textPosition.x + item.width, textPosition.y);
+        context.arc(curveStartX, textPosition.y, 2, 0, 2 * Math.PI);
+        context.closePath();
+        context.fill();
+        context.beginPath();
+        context.setFillStyle('#666666');
+        context.fillText(item.text, textStartX, textPosition.y + 3);
+        context.closePath();
+        context.stroke();
+
+        context.closePath();
+    });
+}
+
+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 drawColumnDataPoints(series, opts, config, context) {
+    var process = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;
+
+    var _calYAxisData = calYAxisData(series, opts, config),
+        ranges = _calYAxisData.ranges;
+
+    var _getXAxisPoints = getXAxisPoints(opts.categories, opts, config),
+        xAxisPoints = _getXAxisPoints.xAxisPoints,
+        eachSpacing = _getXAxisPoints.eachSpacing;
+
+    var minRange = ranges.pop();
+    var maxRange = ranges.shift();
+    context.save();
+    if (opts._scrollDistance_ && opts._scrollDistance_ !== 0 && opts.enableScroll === true) {
+        context.translate(opts._scrollDistance_, 0);
+    }
+
+    series.forEach(function (eachSeries, seriesIndex) {
+        var data = eachSeries.data;
+        var points = getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config, process);
+        points = fixColumeData(points, eachSpacing, series.length, seriesIndex, config, opts);
+
+        // 绘制柱状数据图
+        context.beginPath();
+        context.setFillStyle(eachSeries.color);
+        points.forEach(function (item, index) {
+            if (item !== null) {
+                var startX = item.x - item.width / 2 + 1;
+                var height = opts.height - item.y - config.padding - config.xAxisHeight - config.legendHeight;
+                context.moveTo(startX, item.y);
+                context.rect(startX, item.y, item.width - 2, height);
+            }
+        });
+        context.closePath();
+        context.fill();
+    });
+    series.forEach(function (eachSeries, seriesIndex) {
+        var data = eachSeries.data;
+        var points = getDataPoints(data, minRange, maxRange, xAxisPoints, eachSpacing, opts, config, process);
+        points = fixColumeData(points, eachSpacing, series.length, seriesIndex, config, opts);
+        if (opts.dataLabel !== false && process === 1) {
+            drawPointText(points, eachSeries, config, context);
+        }
+    });
+    context.restore();
+    return {
+        xAxisPoints: xAxisPoints,
+        eachSpacing: eachSpacing
+    };
+}
+
+function drawAreaDataPoints(series, opts, config, context) {
+    var process = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;
+
+    var _calYAxisData2 = calYAxisData(series, opts, config),
+        ranges = _calYAxisData2.ranges;
+
+    var _getXAxisPoints2 = getXAxisPoints(opts.categories, opts, config),
+        xAxisPoints = _getXAxisPoints2.xAxisPoints,
+        eachSpacing = _getXAxisPoints2.eachSpacing;
+
+    var minRange = ranges.pop();
+    var maxRange = ranges.shift();
+    var endY = opts.height - config.padding - config.xAxisHeight - config.legendHeight;
+    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) {
+            // 绘制区域数据
+            context.beginPath();
+            context.setStrokeStyle(eachSeries.color);
+            context.setFillStyle(eachSeries.color);
+            context.setGlobalAlpha(0.6);
+            context.setLineWidth(2);
+            if (points.length > 1) {
+                var firstPoint = points[0];
+                var lastPoint = points[points.length - 1];
+
+                context.moveTo(firstPoint.x, firstPoint.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.lineTo(lastPoint.x, endY);
+                context.lineTo(firstPoint.x, endY);
+                context.lineTo(firstPoint.x, firstPoint.y);
+            } else {
+                var item = points[0];
+                context.moveTo(item.x - eachSpacing / 2, item.y);
+                context.lineTo(item.x + eachSpacing / 2, item.y);
+                context.lineTo(item.x + eachSpacing / 2, endY);
+                context.lineTo(item.x - eachSpacing / 2, endY);
+                context.moveTo(item.x - eachSpacing / 2, item.y);
+            }
+            context.closePath();
+            context.fill();
+            context.setGlobalAlpha(1);
+        });
+
+        if (opts.dataPointShape !== false) {
+            var shape = config.dataPointShape[seriesIndex % config.dataPointShape.length];
+            drawPointShape(points, eachSeries.color, shape, 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 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) {
+            var shape = config.dataPointShape[seriesIndex % config.dataPointShape.length];
+            drawPointShape(points, eachSeries.color, shape, 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 || "#cccccc");
+
+    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 || "#cccccc");
+    context.setLineWidth(1);
+    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 - 2, startY + 5);
+                    context.lineTo(startX + 17, startY + 5);
+                    context.stroke();
+                    context.closePath();
+                    context.beginPath();
+                    context.setLineWidth(1);
+                    context.setStrokeStyle('#ffffff');
+                    context.setFillStyle(item.color);
+                    context.moveTo(startX + 7.5, startY + 5);
+                    context.arc(startX + 7.5, startY + 5, 4, 0, 2 * Math.PI);
+                    context.fill();
+                    context.stroke();
+                    context.closePath();
+                    break;
+                case 'pie':
+                case 'ring':
+                    context.beginPath();
+                    context.setFillStyle(item.color);
+                    context.moveTo(startX + 7.5, startY + 5);
+                    context.arc(startX + 7.5, startY + 5, 7, 0, 2 * Math.PI);
+                    context.closePath();
+                    context.fill();
+                    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, startY + 9);
+            context.closePath();
+            context.stroke();
+            startX += measureText(item.name) + 2 * padding;
+        });
+    });
+}
+function drawPieDataPoints(series, opts, config, context) {
+    var process = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;
+
+    var pieOption = opts.extra.pie || {};
+    series = getPieDataPoints(series, process);
+    var centerPosition = {
+        x: opts.width / 2,
+        y: (opts.height - config.legendHeight) / 2
+    };
+    var radius = Math.min(centerPosition.x - config.pieChartLinePadding - config.pieChartTextPadding - config._pieTextMaxLength_, centerPosition.y - config.pieChartLinePadding - config.pieChartTextPadding);
+    if (opts.dataLabel) {
+        radius -= 10;
+    } else {
+        radius -= 2 * config.padding;
+    }
+    series = series.map(function (eachSeries) {
+        eachSeries._start_ += (pieOption.offsetAngle || 0) * Math.PI / 180;
+        return eachSeries;
+    });
+    series.forEach(function (eachSeries) {
+        context.beginPath();
+        context.setLineWidth(2);
+        context.setStrokeStyle('#ffffff');
+        context.setFillStyle(eachSeries.color);
+        context.moveTo(centerPosition.x, centerPosition.y);
+        context.arc(centerPosition.x, centerPosition.y, radius, eachSeries._start_, eachSeries._start_ + 2 * eachSeries._proportion_ * Math.PI);
+        context.closePath();
+        context.fill();
+        if (opts.disablePieStroke !== true) {
+            context.stroke();
+        }
+    });
+
+    if (opts.type === 'ring') {
+        var innerPieWidth = radius * 0.6;
+        if (typeof opts.extra.ringWidth === 'number' && opts.extra.ringWidth > 0) {
+            innerPieWidth = Math.max(0, radius - opts.extra.ringWidth);
+        }
+        context.beginPath();
+        context.setFillStyle(opts.background || '#ffffff');
+        context.moveTo(centerPosition.x, centerPosition.y);
+        context.arc(centerPosition.x, centerPosition.y, innerPieWidth, 0, 2 * Math.PI);
+        context.closePath();
+        context.fill();
+    }
+
+    if (opts.dataLabel !== false && process === 1) {
+        // fix https://github.com/xiaolin3303/wx-charts/issues/132
+        var valid = false;
+        for (var i = 0, len = series.length; i < len; i++) {
+            if (series[i].data > 0) {
+                valid = true;
+                break;
+            }
+        }
+
+        if (valid) {
+            drawPieText(series, opts, config, context, radius, centerPosition);
+        }
+    }
+
+    if (process === 1 && opts.type === 'ring') {
+        drawRingTitle(opts, config, context);
+    }
+
+    return {
+        center: centerPosition,
+        radius: radius,
+        series: series
+    };
+}
+
+function drawRadarDataPoints(series, opts, config, context) {
+    var process = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : 1;
+
+    var radarOption = opts.extra.radar || {};
+    var coordinateAngle = getRadarCoordinateSeries(opts.categories.length);
+    var centerPosition = {
+        x: opts.width / 2,
+        y: (opts.height - config.legendHeight) / 2
+    };
+
+    var radius = Math.min(centerPosition.x - (getMaxTextListLength(opts.categories) + config.radarLabelTextMargin), centerPosition.y - config.radarLabelTextMargin);
+
+    radius -= config.padding;
+
+    // draw grid
+    context.beginPath();
+    context.setLineWidth(1);
+    context.setStrokeStyle(radarOption.gridColor || "#cccccc");
+    coordinateAngle.forEach(function (angle) {
+        var pos = convertCoordinateOrigin(radius * Math.cos(angle), radius * Math.sin(angle), centerPosition);
+        context.moveTo(centerPosition.x, centerPosition.y);
+        context.lineTo(pos.x, pos.y);
+    });
+    context.stroke();
+    context.closePath();
+
+    // draw split line grid
+
+    var _loop = function _loop(i) {
+        var startPos = {};
+        context.beginPath();
+        context.setLineWidth(1);
+        context.setStrokeStyle(radarOption.gridColor || "#cccccc");
+        coordinateAngle.forEach(function (angle, index) {
+            var pos = convertCoordinateOrigin(radius / config.radarGridCount * i * Math.cos(angle), radius / config.radarGridCount * i * Math.sin(angle), centerPosition);
+            if (index === 0) {
+                startPos = pos;
+                context.moveTo(pos.x, pos.y);
+            } else {
+                context.lineTo(pos.x, pos.y);
+            }
+        });
+        context.lineTo(startPos.x, startPos.y);
+        context.stroke();
+        context.closePath();
+    };
+
+    for (var i = 1; i <= config.radarGridCount; i++) {
+        _loop(i);
+    }
+
+    var radarDataPoints = getRadarDataPoints(coordinateAngle, centerPosition, radius, series, opts, process);
+    radarDataPoints.forEach(function (eachSeries, seriesIndex) {
+        // 绘制区域数据
+        context.beginPath();
+        context.setFillStyle(eachSeries.color);
+        context.setGlobalAlpha(0.6);
+        eachSeries.data.forEach(function (item, index) {
+            if (index === 0) {
+                context.moveTo(item.position.x, item.position.y);
+            } else {
+                context.lineTo(item.position.x, item.position.y);
+            }
+        });
+        context.closePath();
+        context.fill();
+        context.setGlobalAlpha(1);
+
+        if (opts.dataPointShape !== false) {
+            var shape = config.dataPointShape[seriesIndex % config.dataPointShape.length];
+            var points = eachSeries.data.map(function (item) {
+                return item.position;
+            });
+            drawPointShape(points, eachSeries.color, shape, context);
+        }
+    });
+    // draw label text
+    drawRadarLabel(coordinateAngle, radius, centerPosition, opts, config, context);
+
+    return {
+        center: centerPosition,
+        radius: radius,
+        angleList: coordinateAngle
+    };
+}
+
+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;
+    }
+    if (type === 'pie' || type === 'ring') {
+        config._pieTextMaxLength_ = opts.dataLabel === false ? 0 : getPieTextMaxLength(series);
+    }
+
+    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;
+        case 'column':
+            this.animationInstance = new Animation({
+                timing: 'easeIn',
+                duration: duration,
+                onProcess: function onProcess(process) {
+                    drawYAxisGrid(opts, config, context);
+
+                    var _drawColumnDataPoints = drawColumnDataPoints(series, opts, config, context, process),
+                        xAxisPoints = _drawColumnDataPoints.xAxisPoints,
+                        eachSpacing = _drawColumnDataPoints.eachSpacing;
+
+                    _this.chartData.xAxisPoints = xAxisPoints;
+                    _this.chartData.eachSpacing = eachSpacing;
+                    drawXAxis(categories, opts, config, context);
+                    drawLegend(opts.series, opts, config, context);
+                    drawYAxis(series, opts, config, context);
+                    drawCanvas(opts, context);
+                },
+                onAnimationFinish: function onAnimationFinish() {
+                    _this.event.trigger('renderComplete');
+                }
+            });
+            break;
+        case 'area':
+            this.animationInstance = new Animation({
+                timing: 'easeIn',
+                duration: duration,
+                onProcess: function onProcess(process) {
+                    drawYAxisGrid(opts, config, context);
+
+                    var _drawAreaDataPoints = drawAreaDataPoints(series, opts, config, context, process),
+                        xAxisPoints = _drawAreaDataPoints.xAxisPoints,
+                        calPoints = _drawAreaDataPoints.calPoints,
+                        eachSpacing = _drawAreaDataPoints.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;
+        case 'ring':
+        case 'pie':
+            this.animationInstance = new Animation({
+                timing: 'easeInOut',
+                duration: duration,
+                onProcess: function onProcess(process) {
+                    _this.chartData.pieData = drawPieDataPoints(series, opts, config, context, process);
+                    drawLegend(opts.series, opts, config, context);
+                    drawCanvas(opts, context);
+                },
+                onAnimationFinish: function onAnimationFinish() {
+                    _this.event.trigger('renderComplete');
+                }
+            });
+            break;
+        case 'radar':
+            this.animationInstance = new Animation({
+                timing: 'easeInOut',
+                duration: duration,
+                onProcess: function onProcess(process) {
+                    _this.chartData.radarData = drawRadarDataPoints(series, opts, config, context, process);
+                    drawLegend(opts.series, opts, config, context);
+                    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) {
+    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 = 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;
+
+        if (this.opts.type === 'pie' || this.opts.type === 'ring') {
+            return findPieChartCurrentIndex({ x: x, y: y }, this.chartData.pieData);
+        } else if (this.opts.type === 'radar') {
+            return findRadarChartCurrentIndex({ x: x, y: y }, this.chartData.radarData, this.opts.categories.length);
+        } else {
+            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) {
+                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);
+    }
+};
+
+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;
\ No newline at end of file