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base.js
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/**
* echarts组件基类
*
* @desc echarts基于Canvas，纯Javascript图表库，提供直观，生动，可交互，可个性化定制的数据统计图表。
* @author Kener (@Kener-林峰, [email protected])
*
*/
define(function(require) {
function Base(zr){
var ecConfig = require('../config');
var zrUtil = require('zrender/tool/util');
var self = this;
self.zr =zr;
self.shapeList = [];
/**
* 获取zlevel基数配置
* @param {Object} contentType
*/
function getZlevelBase(contentType) {
contentType = contentType || self.type + '';
switch (contentType) {
case ecConfig.COMPONENT_TYPE_GRID :
case ecConfig.COMPONENT_TYPE_AXIS_CATEGORY :
case ecConfig.COMPONENT_TYPE_AXIS_VALUE :
return 0;
case ecConfig.CHART_TYPE_LINE :
case ecConfig.CHART_TYPE_BAR :
case ecConfig.CHART_TYPE_SCATTER :
case ecConfig.CHART_TYPE_PIE :
case ecConfig.CHART_TYPE_RADAR :
case ecConfig.CHART_TYPE_MAP :
case ecConfig.CHART_TYPE_K :
case ecConfig.CHART_TYPE_CHORD:
return 2;
case ecConfig.COMPONENT_TYPE_LEGEND :
case ecConfig.COMPONENT_TYPE_DATARANGE:
case ecConfig.COMPONENT_TYPE_DATAZOOM :
return 4;
case ecConfig.CHART_TYPE_ISLAND :
return 5;
case ecConfig.COMPONENT_TYPE_TOOLBOX :
case ecConfig.COMPONENT_TYPE_TITLE :
return 6;
case ecConfig.COMPONENT_TYPE_TOOLTIP :
return 7;
default :
return 0;
}
}
/**
* 参数修正&默认值赋值
* @param {Object} opt 参数
*
* @return {Object} 修正后的参数
*/
function reformOption(opt) {
return zrUtil.merge(
opt || {},
ecConfig[self.type] || {},
{
'overwrite': false,
'recursive': true
}
);
}
/**
* css类属性数组补全，如padding，margin等~
*/
function reformCssArray(p) {
if (p instanceof Array) {
switch (p.length + '') {
case '4':
return p;
case '3':
return [p[0], p[1], p[2], p[1]];
case '2':
return [p[0], p[1], p[0], p[1]];
case '1':
return [p[0], p[0], p[0], p[0]];
case '0':
return [0, 0, 0, 0];
}
}
else {
return [p, p, p, p];
}
}
/**
* 获取多级控制嵌套属性的基础方法
* 返回ctrList中优先级最高（最靠前）的非undefined属性，ctrList中均无定义则返回undefined
*/
var deepQuery = (function() {
/**
* 获取嵌套选项的基础方法
* 返回optionTarget中位于optionLocation上的值，如果没有定义，则返回undefined
*/
function _query(optionTarget, optionLocation) {
if (typeof optionTarget == 'undefined') {
return undefined;
}
if (!optionLocation) {
return optionTarget;
}
optionLocation = optionLocation.split('.');
var length = optionLocation.length;
var curIdx = 0;
while (curIdx < length) {
optionTarget = optionTarget[optionLocation[curIdx]];
if (typeof optionTarget == 'undefined') {
return undefined;
}
curIdx++;
}
return optionTarget;
}
return function(ctrList, optionLocation) {
var finalOption;
for (var i = 0, l = ctrList.length; i < l; i++) {
finalOption = _query(ctrList[i], optionLocation);
if (typeof finalOption != 'undefined') {
return finalOption;
}
}
return undefined;
};
})();
/**
* 获取自定义和默认配置合并后的字体设置
*/
function getFont(textStyle) {
var finalTextStyle = zrUtil.merge(
zrUtil.clone(textStyle) || {},
ecConfig.textStyle,
{ 'overwrite': false}
);
return finalTextStyle.fontStyle + ' '
+ finalTextStyle.fontWeight + ' '
+ finalTextStyle.fontSize + 'px '
+ finalTextStyle.fontFamily;
}
/**
* 添加文本
*/
function addLabel(tarShape, serie, data, name, orient) {
// 多级控制
var nLabel = zrUtil.merge(
zrUtil.clone(
self.deepQuery([serie], 'itemStyle.normal.label')
),
self.deepQuery([data], 'itemStyle.normal.label'),
{ 'overwrite': true, 'recursive': true }
);
var eLabel = zrUtil.merge(
zrUtil.clone(
self.deepQuery([serie], 'itemStyle.emphasis.label')
),
self.deepQuery([data], 'itemStyle.emphasis.label'),
{ 'overwrite': true, 'recursive': true }
);
var nTextStyle = nLabel.textStyle || {};
var eTextStyle = eLabel.textStyle || {};
if (nLabel.show) {
tarShape.style.text = _getLabelText(
serie, data, name, 'normal'
);
tarShape.style.textPosition =
typeof nLabel.position == 'undefined'
? (orient == 'horizontal' ? 'right' : 'top')
: nLabel.position;
tarShape.style.textColor = nTextStyle.color;
tarShape.style.textFont = self.getFont(nTextStyle);
}
if (eLabel.show) {
tarShape.highlightStyle.text = _getLabelText(
serie, data, name, 'emphasis'
);
tarShape.highlightStyle.textPosition =
typeof eLabel.position == 'undefined'
? (orient == 'horizontal' ? 'right' : 'top')
: eLabel.position;
tarShape.highlightStyle.textColor = eTextStyle.color;
tarShape.highlightStyle.textFont = self.getFont(eTextStyle);
}
return tarShape;
}
/**
* 根据lable.format计算label text
*/
function _getLabelText(serie, data, name, status) {
var formatter = self.deepQuery(
[data, serie],
'itemStyle.' + status + '.label.formatter'
);
var value = typeof data != 'undefined'
? (typeof data.value != 'undefined'
? data.value
: data)
: '-';
if (formatter) {
if (typeof formatter == 'function') {
return formatter(
serie.name,
name,
value
);
}
else if (typeof formatter == 'string') {
formatter = formatter.replace('{a}','{a0}')
.replace('{b}','{b0}')
.replace('{c}','{c0}');
formatter = formatter.replace('{a0}', serie.name)
.replace('{b0}', name)
.replace('{c0}', value);
return formatter;
}
}
else {
return value;
}
}
/**
* 百分比计算
*/
function parsePercent(value, maxValue) {
if (typeof(value) === 'string') {
if (_trim(value).match(/%$/)) {
return parseFloat(value) / 100 * maxValue;
} else {
return parseFloat(value);
}
} else {
return value;
}
}
/**
* 获取中心坐标
*/
function parseCenter(center) {
return [
parsePercent(center[0], self.zr.getWidth()),
parsePercent(center[1], self.zr.getHeight()),
];
}
function _trim(str) {
return str.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
}
// 记录自适应原始定义，resize用
function backupAdaptiveParams(series, attrs, isAll) {
for (var i = 0, l = series.length; i < l; i++) {
if (isAll || series[i].type == self.type) {
for (var j = 0, k = attrs.length; j < k; j++) {
series[i]['__' + attrs[i]] = zrUtil.clone(
series[i][attrs[i]]
);
}
}
}
}
// 还原自适应原始定义，resize用
function restoreAdaptiveParams(series, attrs, isAll) {
for (var i = 0, l = series.length; i < l; i++) {
if (isAll || series[i].type == self.type) {
for (var j = 0, k = attrs.length; j < k; j++) {
series[i][attrs[i]] = zrUtil.clone(
series[i]['__' + attrs[i]]
);
}
}
}
}
function resize() {
self.refresh && self.refresh();
}
/**
* 清除图形数据，实例仍可用
*/
function clear() {
if (self.zr) {
self.zr.delShape(self.shapeList);
self.zr.clearAnimation
&& self.zr.clearAnimation();
}
self.shapeList = [];
}
/**
* 释放后实例不可用
*/
function dispose() {
self.clear();
self.shapeList = null;
self = null;
}
/**
* 基类方法
*/
self.getZlevelBase = getZlevelBase;
self.reformOption = reformOption;
self.reformCssArray = reformCssArray;
self.deepQuery = deepQuery;
self.getFont = getFont;
self.addLabel = addLabel;
self.parsePercent = parsePercent;
self.parseCenter = parseCenter;
self.clear = clear;
self.dispose = dispose;
self.backupAdaptiveParams = backupAdaptiveParams;
self.restoreAdaptiveParams = restoreAdaptiveParams;
self.resize = resize;
}
return Base;
});