/**
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* echarts组件：图表标题
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*
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* @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。
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* @author Kener (@Kener-林峰, kener.linfeng@gmail.com)
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*
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*/
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define(function (require) {
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var Base = require('./base');
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// 图形依赖
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var TextShape = require('zrender/shape/Text');
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var RectangleShape = require('zrender/shape/Rectangle');
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var ecConfig = require('../config');
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// 图表标题
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ecConfig.title = {
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zlevel: 0, // 一级层叠
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z: 6, // 二级层叠
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show: true,
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text: '',
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// link: null, // 超链接跳转
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// target: null, // 仅支持self | blank
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subtext: '',
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// sublink: null, // 超链接跳转
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// subtarget: null, // 仅支持self | blank
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x: 'left', // 水平安放位置，默认为左对齐，可选为：
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// 'center' ¦ 'left' ¦ 'right'
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// ¦ {number}（x坐标，单位px）
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y: 'top', // 垂直安放位置，默认为全图顶端，可选为：
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// 'top' ¦ 'bottom' ¦ 'center'
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// ¦ {number}（y坐标，单位px）
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//textAlign: null // 水平对齐方式，默认根据x设置自动调整
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backgroundColor: 'rgba(0,0,0,0)',
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borderColor: '#ccc', // 标题边框颜色
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borderWidth: 0, // 标题边框线宽，单位px，默认为0（无边框）
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padding: 5, // 标题内边距，单位px，默认各方向内边距为5，
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// 接受数组分别设定上右下左边距，同css
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itemGap: 5, // 主副标题纵向间隔，单位px，默认为10，
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textStyle: {
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fontSize: 18,
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fontWeight: 'bolder',
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color: '#333' // 主标题文字颜色
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},
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subtextStyle: {
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color: '#aaa' // 副标题文字颜色
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}
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};
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var zrUtil = require('zrender/tool/util');
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var zrArea = require('zrender/tool/area');
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var zrColor = require('zrender/tool/color');
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/**
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* 构造函数
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* @param {Object} messageCenter echart消息中心
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* @param {ZRender} zr zrender实例
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* @param {Object} option 图表参数
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*/
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function Title(ecTheme, messageCenter, zr, option, myChart) {
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Base.call(this, ecTheme, messageCenter, zr, option, myChart);
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this.refresh(option);
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}
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Title.prototype = {
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type: ecConfig.COMPONENT_TYPE_TITLE,
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_buildShape: function () {
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if (!this.titleOption.show) {
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return;
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}
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// 标题元素组的位置参数，通过计算所得x, y, width, height
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this._itemGroupLocation = this._getItemGroupLocation();
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this._buildBackground();
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this._buildItem();
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for (var i = 0, l = this.shapeList.length; i < l; i++) {
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this.zr.addShape(this.shapeList[i]);
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}
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},
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/**
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* 构建所有标题元素
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*/
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_buildItem: function () {
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var text = this.titleOption.text;
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var link = this.titleOption.link;
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var target = this.titleOption.target;
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var subtext = this.titleOption.subtext;
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var sublink = this.titleOption.sublink;
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var subtarget = this.titleOption.subtarget;
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var font = this.getFont(this.titleOption.textStyle);
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var subfont = this.getFont(this.titleOption.subtextStyle);
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var x = this._itemGroupLocation.x;
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var y = this._itemGroupLocation.y;
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var width = this._itemGroupLocation.width;
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var height = this._itemGroupLocation.height;
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var textShape = {
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zlevel: this.getZlevelBase(),
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z: this.getZBase(),
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style: {
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y: y,
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color: this.titleOption.textStyle.color,
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text: text,
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textFont: font,
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textBaseline: 'top'
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},
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highlightStyle: {
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color: zrColor.lift(this.titleOption.textStyle.color, 1),
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brushType: 'fill'
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},
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hoverable: false
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};
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if (link) {
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textShape.hoverable = true;
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textShape.clickable = true;
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textShape.onclick = function (){
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if (!target || target != 'self') {
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window.open(link);
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}
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else {
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window.location = link;
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}
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};
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}
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var subtextShape = {
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zlevel: this.getZlevelBase(),
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z: this.getZBase(),
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style: {
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y: y + height,
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color: this.titleOption.subtextStyle.color,
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text: subtext,
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textFont: subfont,
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textBaseline: 'bottom'
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},
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highlightStyle: {
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color: zrColor.lift(this.titleOption.subtextStyle.color, 1),
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brushType: 'fill'
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},
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hoverable: false
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};
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if (sublink) {
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subtextShape.hoverable = true;
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subtextShape.clickable = true;
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subtextShape.onclick = function (){
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if (!subtarget || subtarget != 'self') {
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window.open(sublink);
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}
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else {
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window.location = sublink;
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}
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};
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}
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switch (this.titleOption.x) {
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case 'center' :
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textShape.style.x = subtextShape.style.x = x + width / 2;
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textShape.style.textAlign = subtextShape.style.textAlign
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= 'center';
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break;
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case 'left' :
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textShape.style.x = subtextShape.style.x = x;
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textShape.style.textAlign = subtextShape.style.textAlign
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= 'left';
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break;
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case 'right' :
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textShape.style.x = subtextShape.style.x = x + width;
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textShape.style.textAlign = subtextShape.style.textAlign
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= 'right';
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break;
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default :
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x = this.titleOption.x - 0;
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x = isNaN(x) ? 0 : x;
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textShape.style.x = subtextShape.style.x = x;
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break;
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}
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if (this.titleOption.textAlign) {
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textShape.style.textAlign = subtextShape.style.textAlign
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= this.titleOption.textAlign;
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}
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this.shapeList.push(new TextShape(textShape));
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subtext !== '' && this.shapeList.push(new TextShape(subtextShape));
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},
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_buildBackground: function () {
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var padding = this.reformCssArray(this.titleOption.padding);
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this.shapeList.push(new RectangleShape({
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zlevel: this.getZlevelBase(),
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z: this.getZBase(),
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hoverable :false,
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style: {
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x: this._itemGroupLocation.x - padding[3],
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y: this._itemGroupLocation.y - padding[0],
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width: this._itemGroupLocation.width + padding[3] + padding[1],
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height: this._itemGroupLocation.height + padding[0] + padding[2],
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brushType: this.titleOption.borderWidth === 0 ? 'fill' : 'both',
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color: this.titleOption.backgroundColor,
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strokeColor: this.titleOption.borderColor,
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lineWidth: this.titleOption.borderWidth
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}
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}));
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},
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/**
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* 根据选项计算标题实体的位置坐标
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*/
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_getItemGroupLocation: function () {
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var padding = this.reformCssArray(this.titleOption.padding);
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var text = this.titleOption.text;
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var subtext = this.titleOption.subtext;
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var font = this.getFont(this.titleOption.textStyle);
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var subfont = this.getFont(this.titleOption.subtextStyle);
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var totalWidth = Math.max(
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zrArea.getTextWidth(text, font),
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zrArea.getTextWidth(subtext, subfont)
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);
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var totalHeight = zrArea.getTextHeight(text, font)
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+ (subtext === ''
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? 0
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: (this.titleOption.itemGap
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+ zrArea.getTextHeight(subtext, subfont))
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);
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var x;
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var zrWidth = this.zr.getWidth();
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switch (this.titleOption.x) {
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case 'center' :
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x = Math.floor((zrWidth - totalWidth) / 2);
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break;
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case 'left' :
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x = padding[3] + this.titleOption.borderWidth;
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break;
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case 'right' :
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x = zrWidth
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- totalWidth
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- padding[1]
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- this.titleOption.borderWidth;
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break;
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default :
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x = this.titleOption.x - 0;
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x = isNaN(x) ? 0 : x;
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break;
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}
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var y;
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var zrHeight = this.zr.getHeight();
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switch (this.titleOption.y) {
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case 'top' :
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y = padding[0] + this.titleOption.borderWidth;
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break;
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case 'bottom' :
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y = zrHeight
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- totalHeight
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- padding[2]
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- this.titleOption.borderWidth;
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break;
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case 'center' :
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y = Math.floor((zrHeight - totalHeight) / 2);
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break;
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default :
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y = this.titleOption.y - 0;
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y = isNaN(y) ? 0 : y;
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break;
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}
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return {
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x: x,
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y: y,
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width: totalWidth,
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height: totalHeight
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};
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},
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/**
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* 刷新
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*/
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refresh: function (newOption) {
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if (newOption) {
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this.option = newOption;
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this.option.title = this.reformOption(this.option.title);
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this.titleOption = this.option.title;
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this.titleOption.textStyle = this.getTextStyle(
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this.titleOption.textStyle
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);
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this.titleOption.subtextStyle = this.getTextStyle(
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this.titleOption.subtextStyle
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);
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}
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this.clear();
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this._buildShape();
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}
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};
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zrUtil.inherits(Title, Base);
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require('../component').define('title', Title);
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return Title;
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});
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