/**
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* echarts组件：孤岛数据
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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 ChartBase = require('./base');
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// 图形依赖
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var CircleShape = require('zrender/shape/Circle');
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var ecConfig = require('../config');
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ecConfig.island = {
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zlevel: 0, // 一级层叠
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z: 5, // 二级层叠
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r: 15,
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calculateStep: 0.1 // 滚轮可计算步长 0.1 = 10%
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};
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var ecData = require('../util/ecData');
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var zrUtil = require('zrender/tool/util');
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var zrEvent = require('zrender/tool/event');
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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 图表选项
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*/
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function Island(ecTheme, messageCenter, zr, option, myChart) {
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// 图表基类
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ChartBase.call(this, ecTheme, messageCenter, zr, option, myChart);
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this._nameConnector;
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this._valueConnector;
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this._zrHeight = this.zr.getHeight();
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this._zrWidth = this.zr.getWidth();
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var self = this;
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/**
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* 滚轮改变孤岛数据值
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*/
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self.shapeHandler.onmousewheel = function (param) {
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var shape = param.target;
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var event = param.event;
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var delta = zrEvent.getDelta(event);
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delta = delta > 0 ? (-1) : 1;
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shape.style.r -= delta;
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shape.style.r = shape.style.r < 5 ? 5 : shape.style.r;
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var value = ecData.get(shape, 'value');
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var dvalue = value * self.option.island.calculateStep;
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value = dvalue > 1
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? (Math.round(value - dvalue * delta))
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: +(value - dvalue * delta).toFixed(2);
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var name = ecData.get(shape, 'name');
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shape.style.text = name + ':' + value;
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ecData.set(shape, 'value', value);
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ecData.set(shape, 'name', name);
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self.zr.modShape(shape.id);
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self.zr.refreshNextFrame();
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zrEvent.stop(event);
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};
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}
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Island.prototype = {
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type: ecConfig.CHART_TYPE_ISLAND,
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/**
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* 孤岛合并
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*
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* @param {string} tarShapeIndex 目标索引
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* @param {Object} srcShape 源目标，合入目标后删除
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*/
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_combine: function (tarShape, srcShape) {
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var zrColor = require('zrender/tool/color');
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var accMath = require('../util/accMath');
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var value = accMath.accAdd(
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ecData.get(tarShape, 'value'),
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ecData.get(srcShape, 'value')
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);
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var name = ecData.get(tarShape, 'name')
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+ this._nameConnector
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+ ecData.get(srcShape, 'name');
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tarShape.style.text = name + this._valueConnector + value;
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ecData.set(tarShape, 'value', value);
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ecData.set(tarShape, 'name', name);
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tarShape.style.r = this.option.island.r;
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tarShape.style.color = zrColor.mix(
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tarShape.style.color,
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srcShape.style.color
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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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newOption.island = this.reformOption(newOption.island);
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this.option = newOption;
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this._nameConnector = this.option.nameConnector;
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this._valueConnector = this.option.valueConnector;
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}
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},
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getOption: function () {
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return this.option;
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},
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resize: function () {
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var newWidth = this.zr.getWidth();
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var newHieght = this.zr.getHeight();
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var xScale = newWidth / (this._zrWidth || newWidth);
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var yScale = newHieght / (this._zrHeight || newHieght);
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if (xScale === 1 && yScale === 1) {
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return;
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}
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this._zrWidth = newWidth;
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this._zrHeight = newHieght;
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for (var i = 0, l = this.shapeList.length; i < l; i++) {
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this.zr.modShape(
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this.shapeList[i].id,
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{
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style: {
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x: Math.round(this.shapeList[i].style.x * xScale),
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y: Math.round(this.shapeList[i].style.y * yScale)
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}
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}
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);
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}
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},
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add: function (shape) {
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var name = ecData.get(shape, 'name');
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var value = ecData.get(shape, 'value');
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var seriesName = ecData.get(shape, 'series') != null
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? ecData.get(shape, 'series').name
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: '';
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var font = this.getFont(this.option.island.textStyle);
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var islandShape = {
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zlevel: this.getZlevelBase(),
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z: this.getZBase(),
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style: {
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x: shape.style.x,
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y: shape.style.y,
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r: this.option.island.r,
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color: shape.style.color || shape.style.strokeColor,
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text: name + this._valueConnector + value,
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textFont: font
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},
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draggable: true,
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hoverable: true,
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onmousewheel: this.shapeHandler.onmousewheel,
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_type: 'island'
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};
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if (islandShape.style.color === '#fff') {
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islandShape.style.color = shape.style.strokeColor;
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}
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this.setCalculable(islandShape);
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islandShape.dragEnableTime = 0;
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ecData.pack(
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islandShape,
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{name:seriesName}, -1,
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value, -1,
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name
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);
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islandShape = new CircleShape(islandShape);
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this.shapeList.push(islandShape);
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this.zr.addShape(islandShape);
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},
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del: function (shape) {
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this.zr.delShape(shape.id);
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var newShapeList = [];
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for (var i = 0, l = this.shapeList.length; i < l; i++) {
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if (this.shapeList[i].id != shape.id) {
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newShapeList.push(this.shapeList[i]);
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}
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}
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this.shapeList = newShapeList;
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},
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/**
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* 数据项被拖拽进来， 重载基类方法
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*/
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ondrop: function (param, status) {
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if (!this.isDrop || !param.target) {
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// 没有在当前实例上发生拖拽行为则直接返回
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return;
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}
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// 拖拽产生孤岛数据合并
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var target = param.target; // 拖拽安放目标
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var dragged = param.dragged; // 当前被拖拽的图形对象
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this._combine(target, dragged);
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this.zr.modShape(target.id);
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status.dragIn = true;
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// 处理完拖拽事件后复位
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this.isDrop = false;
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return;
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},
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/**
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* 数据项被拖拽出去， 重载基类方法
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*/
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ondragend: function (param, status) {
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var target = param.target; // 拖拽安放目标
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if (!this.isDragend) {
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// 拖拽的不是孤岛数据，如果没有图表接受孤岛数据，需要新增孤岛数据
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if (!status.dragIn) {
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target.style.x = zrEvent.getX(param.event);
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target.style.y = zrEvent.getY(param.event);
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this.add(target);
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status.needRefresh = true;
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}
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}
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else {
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// 拖拽的是孤岛数据，如果有图表接受了孤岛数据，需要删除孤岛数据
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if (status.dragIn) {
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this.del(target);
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status.needRefresh = true;
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}
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}
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// 处理完拖拽事件后复位
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this.isDragend = false;
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return;
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}
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};
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zrUtil.inherits(Island, ChartBase);
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// 图表注册
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require('../chart').define('island', Island);
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return Island;
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});
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