Flex自定义组件开发
一般情况下需要组件重写都是由于以下2个原因：
1、在FLEX已有组件无法满足业务需求，或是需要更改其可视化外观等特性时，直接进行继承扩展。
2、为了模块化设计或进一步重用，需要对FLEX组件进行组合。
而Flex组件开发有2种方式：AS方式和MXML方式。对于上述第一个原因我一般采用AS方式，通过继承UIComponent来开发，而针对原因2我一般使用的是MXML方式。本文主要讲的是AS开发方式。
重写一个组件依次调用的方法 ：
1）Constructor构造方法，初始化属性，默认值 在这个方法中使用最好。
2）createChildren() 创建子对象，在组件中添加子对象。是使用addChild方法添加子对象
3）commitProperties 用在处理属性值和更新。（多个属性值更新后统一处理入口和单值多次修改后处理入口）
4）measure()设置组件的默认大小（以便Flex布局管理器能正确知道该组件的大小，给其分配适当空间）
5）updateDisplayList()用来重绘组件，子对象布局逻辑等
我们通过这样一个例子来讲解（鼠标划过弹出数据显示）。
1、在FLEX已有组件无法满足业务需求，或是需要更改其可视化外观等特性时，直接进行继承扩展。
2、为了模块化设计或进一步重用，需要对FLEX组件进行组合。
而Flex组件开发有2种方式：AS方式和MXML方式。对于上述第一个原因我一般采用AS方式，通过继承UIComponent来开发，而针对原因2我一般使用的是MXML方式。本文主要讲的是AS开发方式。
重写一个组件依次调用的方法 ：
1）Constructor构造方法，初始化属性，默认值 在这个方法中使用最好。
2）createChildren() 创建子对象，在组件中添加子对象。是使用addChild方法添加子对象
3）commitProperties 用在处理属性值和更新。（多个属性值更新后统一处理入口和单值多次修改后处理入口）
4）measure()设置组件的默认大小（以便Flex布局管理器能正确知道该组件的大小，给其分配适当空间）
5）updateDisplayList()用来重绘组件，子对象布局逻辑等
我们通过这样一个例子来讲解（鼠标划过弹出数据显示）。
首先是Constructor方法：
public function MultilayerHorizontalBarChart() { super(); }
由于该例不需要在构造初始化属性（一般简单数据类型在定义的时候就已经赋值），所以构造方法没内容；
接着是createChildren方法：
override protected function createChildren():void { super.createChildren(); if (_mXis == null) { _mXis = new Group(); addChild(_mXis); } if (_mYis == null) { _mYis = new Group(); addChild(_mYis); } if (_mHBarIDLable == null ) { _mHBarIDLable = new Group(); addChild(_mHBarIDLable); } if (_gridLines == null) { _gridLines = new Group(); addChild(_gridLines); } if (_mMainHDraw == null) { _mMainHDraw = new Group(); addChild(_mMainHDraw); } if (_mEventGroup == null){ _mEventGroup = new Group(); addChild(_mEventGroup); _mEventGroup.addEventListener(MouseEvent.MOUSE_OUT, deleDataHandler); _mEventGroup.addEventListener(MouseEvent.MOUSE_MOVE,showDataHandler); } if (mFloatIsShow) { if (floatDataPanel == null) { floatDataPanel = new BorderContainer(); floatInerPanel = new BorderContainer(); floatDataPanel.setStyle("cornerRadius",15); floatInerPanel.setStyle("cornerRadius",15); var vs:SolidColor = new SolidColor(); vs.color = 0x6A726B; vs.alpha = 0.3; floatDataPanel.backgroundFill = vs; floatDataPanel.visible = false; _mEventGroup.addElement(floatDataPanel); } } }
这里涉及到组件子对象的划分，本例子中，具有的子对象有_mXis X轴容器对象，_mYis Y轴容器对象，_mHBarIDLable 柱子标签容器对象（最上方月份提示那个），_gridLines 网格容器对象，_mMainHDraw 主画布对象（用来画柱状图的容器），_mEventGroup 鼠标事件监听容器对象，floatDataPanel、floatInerPanel 是显示数据的浮动框容器对象。在该方法里我们初始化这些子对象并把他们添加到组件容器中。
接下来是commitProperties 用在处理属性值和更新，本例子中这些事情都在updateDisplayList处理，重点掌握updateDisplayList方法的重写。
接着是measure方法的重写（本例中，重绘的时候都会重新调整自对象的位置和大小，所以该方法的重写也可以省略）：
override protected function measure():void { super.measure(); measuredMinHeight = measuredHeight = DEFAULT_HEIGHT; measuredMinWidth = measuredWidth = DEFAULT_WIDTH; }
接下来是本例的重头戏，updateDisplayList方法的重写：
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { if (_isReflash) { super.updateDisplayList(unscaledWidth, unscaledHeight); if (dataProvider == null) { return; } for (var i:int = 0; i < dataProvider.ColumnName.length; i++) { //如果存在空数据就设定标识退出循环 if (null == dataProvider.Data[dataProvider.ColumnName[i]]) { _checkData = false; break; } } if (_checkData) { drawLayouts(unscaledWidth,unscaledHeight); drawXAxis(); drawYAxis(); drawGrid(); legendHBarLine(); drawHBar(); } _isReflash = false; } }
该方法中，先对数据源进行检验，只有但数据源不为空并且是新的数据源才进行重绘，否则不作处理。重绘做的事情主要是： drawLayouts(unscaledWidth,unscaledHeight)子对象布局，子对象位置和大小的确定;drawXAxis()重绘X轴容器自对象;drawYAxis()重绘Y轴容器子对象;legendHBarLine()重绘数据标签提示自对象;drawGrid()、drawHBar()主画布区域子对象重绘，画网格和柱状图;
drawLayouts方法：
protected function drawLayouts(pW:Number, pH:Number):void { this._mXis.setActualSize(pW - this.mYAxisWidth, this.mXAxisHeight); _mXis.move(this.mYAxisWidth, pH - this.mXAxisHeight); this._mYis.setActualSize(this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mYis.move(0,this.mHBarIDLableHeight); //X轴标签位置 this._mHBarIDLable.setActualSize(pW - this.mYAxisWidth, this.mHBarIDLableHeight); this._mHBarIDLable.move(this.mYAxisWidth, -10); this._gridLines.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._gridLines.move(this.mYAxisWidth, this.mHBarIDLableHeight); this._mMainHDraw.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mMainHDraw.move(this.mYAxisWidth, this.mHBarIDLableHeight); this._mEventGroup.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mEventGroup.move(this.mYAxisWidth, this.mHBarIDLableHeight); }
确定各子对象的宽高和x,y坐标，对整个组件容器区域进行划分。
drawXAxis方法：
protected function drawXAxis():void { var _mXMaxValue:Number =100; // TODO Auto Generated method stub var vGroup:Group = this._mXis; var vG:Graphics = vGroup.graphics; vGroup.removeAllElements(); vG.clear(); vG.lineStyle(1, 0x000000,0.8); vG.moveTo(0, 0); vG.lineTo(vGroup.width,0); _mXCachedTicks = new Vector.<Number>(); _mXCacheValueTicks = new Vector.<Number>(); //将X轴分成xbisectNum等份 默认为10 var vCount:int = xBisectNum; var vGap:Number = vGroup.width / vCount; var vGapValue:Number = _mXMaxValue / vCount; var vNum:Number; var vX:Number for(var i:int=0; i <= vCount; i++){ vX = i * vGap; vG.moveTo(vX, 0); vG.lineTo(vX,6); _mXCachedTicks.push(vX); var vTextField:Text = new Text(); vNum = i*vGapValue; vTextField.text = vNum.toString() + "%"; var vTlm:TextLineMetrics = measureText(vTextField.text); vTextField.move( vX - vTlm.width / 2, 10); vGroup.addElement(vTextField); } vGroup = null; vG = null; }
画坐标轴并添加上刻度值数据标签。
drawYAxis方法：
protected function drawYAxis():void { var vGroup:Group = this._mYis; var vG:Graphics = vGroup.graphics; vGroup.removeAllElements(); vG.clear(); vG.lineStyle(1, 0x000000,0.8); vG.moveTo(vGroup.width, 0); vG.lineTo(vGroup.width, vGroup.height); _mYCachedTicks = new Vector.<Number>(); //Y轴数据的个数 var vCount:int = this.dataProvider.RowCount; var vGap:Number = vGroup.height / vCount; //存储Y轴刻度高度，供之后画图使用 this._mYGap = vGap; vG.moveTo(vGroup.width - 6, 0); vG.lineTo(vGroup.width, 0); for (var i:int = 0; i <= vCount; i++) { var vY:Number = (i) * vGap; vG.moveTo(vGroup.width-6, vY); vG.lineTo(vGroup.width, vY); _mYCachedTicks.push(vY); var vTextField:Label = new Label(); if (i < vCount) { //把Y轴的显示的标签加上 vTextField.text = this.dataProvider.Data[categoryField][i]; var vTlm:TextLineMetrics = measureText(vTextField.text); vTextField.move(vGroup.width - vTlm.width - 20, vY + vGap/2 - vTlm.height / 2); vGroup.addElement(vTextField); } } vGroup = null; vG = null; }
画Y轴坐标轴并添加数据指标标签。
legendHBarLine方法：
protected function legendHBarLine():void { var vGroup:Group = this._mHBarIDLable; var vIDLableLen:Number = vGroup.width/this._mHBarCenNum; var vGap:Number = vIDLableLen / 6; var vHLineLen:Number = vGap*0.6; var vHY:Number = vGroup.height /2; var vG:Graphics =vGroup.graphics; _mHBarIDLable.removeAllElements(); vG.clear(); var vLBuffef:Number = 0; for(var i:int=0; i < this._mHBarCenNum; i++) { var vName:Label = new Label(); vG.lineStyle(0.2, this.mHBarColorArray[i%this.mHBarColorArray.length]); //对颜色数组取余可防止颜色数组不足时index越界 vG.beginFill(mHBarColorArray[i]); vG.drawRect(vLBuffef,vHY,vHLineLen,vHLineLen); vG.endFill(); vName.text = this.dataProvider.ColumnName[i+1]; vName.x = vLBuffef + vHLineLen; vName.y = vHY/2; _mHBarIDLable.addElement(vName); vLBuffef += vIDLableLen; } vGroup = null; vG = null; }
容器内顶部画添加数据提示标签。
drawGrid方法：
protected function drawGrid():void { var vGroup:Group = _gridLines; var vG:Graphics = vGroup.graphics; vG.clear(); var vColor:uint = 0xBFBFBF; var vAlpha:Number = 0.3; vG.lineStyle(1, vColor, vAlpha); var vLen:Number; var vPoint:Point; var i:int; var pos:int; //画横线 if (_mYCachedTicks && _mYCachedTicks.length > 0) { vLen = vGroup.width / 10; var vgHeight:Number; for (i = 0; i < _mYCachedTicks.length - 1; i++) { vgHeight = _mYCachedTicks[i]; for (pos = 0; pos < vLen; pos++) { vG.moveTo(pos * 10, vgHeight); vG.lineTo(pos * 10 + 6, vgHeight); } } } //画竖线 if (_mXCachedTicks && _mXCachedTicks.length > 0) { vLen = vGroup.height / 10; var vMax:int = _mXCachedTicks.length; for (i = 1; i < vMax; i++) { var vWidth:Number = _mXCachedTicks[i]; for (pos = 0; pos < vLen; pos++) { vG.moveTo(vWidth, pos * 10); vG.lineTo(vWidth, pos * 10 + 6); } } } }
画网格，虚线，这里以10个像素为单位，画6个像素点，空4个像素点也就成了虚线。
drawHBar方法：
protected function drawHBar():void { //矩形高度 var vHBarHeight:Number = this._mYGap * 2 / 5; _mMainHDraw.removeAllElements(); var vGroup:Group = this._mMainHDraw; vGroup.removeAllElements(); var vG:Graphics = vGroup.graphics; vG.clear(); var vColumnNameTemp:String = null; //从左到右从上到下画矩形 var columnLen:int = this.dataProvider.ColumnName.length; //用来存放遍历到的主要数据 var vValue:Number = 0; for(var vIndex:int = 0; vIndex < this.dataProvider.RowCount; vIndex++) { //累积的矩形宽度，最长不能超过100% var vSumWidth:Number = 0; //第一个数组0放的是Y轴标签，直接略过 for(var vColumnIndex:int = 1; vColumnIndex < columnLen; vColumnIndex++) { vColumnNameTemp = this.dataProvider.ColumnName[vColumnIndex]; //vColumnIndex是从1开始的，跳过“yAxisData”字段，这里要减去1 var vColor:uint = this.mHBarColorArray[(vColumnIndex-1) % this.mHBarColorArray.length]; vValue = Number(this._mPercentData[vColumnNameTemp][vIndex]); if( vSumWidth>1) { vSumWidth = 1; } vG.beginFill(vColor); vG.drawRect(vSumWidth*this._mMainHDraw.width, this._mYCachedTicks[vIndex] + this._mYGap/2 - vHBarHeight/2 , vValue*this._mMainHDraw.width, vHBarHeight); vG.endFill(); vSumWidth += vValue; } } vGroup = null; vG = null; }
根据数据源计算出个柱子的位置和大小并在主画布区域画出来。
还有鼠标事件处理方法就不一一列出，具体看完整代码。
MultilayerHorizontalBarChart.as文件：
package LineChartTableTest { import DataEntity.DataTable; import flash.display.Graphics; import flash.events.MouseEvent; import flash.geom.Point; import flash.text.TextLineMetrics; import flash.utils.Dictionary; import mx.controls.Label; import mx.controls.Text; import mx.core.UIComponent; import mx.graphics.SolidColor; import spark.components.BorderContainer; import spark.components.Group; import spark.layouts.VerticalLayout; /** * 水平叠柱状图 * @author haojie.wang * @date 2013-4-27 * @version 1.0 * <b> * X轴为百分比，Y轴为各指标\n * 这里必须注意的是categoryField的设置，dataTable的column[0]必须是_categoryField的值 * </b> */ public class MultilayerHorizontalBarChart extends UIComponent { protected static const DEFAULT_HEIGHT:Number = 300; protected static const DEFAULT_WIDTH:Number = 960; //=========================== // 可通过外部属性定义从而改变控件属性start //=========================== /** * X轴的高度 */ protected var _mXAxisHeight:Number = 50; /** * Y轴宽度 */ protected var _mYAxisWidth:Number = 100; /** * 等分值，把X轴设成多少等分，默认为10 */ private var _xBisectNum:int = 10; /** * X轴单位 */ private var _mXUnit:String; /** * Y轴单位 */ private var _mYUnit:String; /** * 图表名称 */ private var _mChartName:String; /** * 是否显示悬浮框 */ protected var _mFloatIsShow:Boolean = true; //=========================== // 可通过外部属性定义从而改变控件属性end //=========================== //=========================== // 接收控件所需要的数据参数start //=========================== /** * 主要数据源 */ protected var _dataProvider:DataTable; /** * 字段参数 ,默认为“yAxisData” */ protected var _categoryField:String ="yAxisData"; /** * 颜色数组 */ protected var _mHBarColorArray:Array; //=========================== // 接收控件所需要的数据参数end //=========================== //=========================== // 控件内部使用属性，不需要外部传值start //=========================== /** * 每行的总和数组，统计每行各数值的和 */ protected var _mRowSumArray:Array; /** * 存放DataTable里data数据的百分比格式 */ protected var _mPercentData:Dictionary; /** *需要画的柱子的层数,默认为6 */ protected var _mHBarCenNum:int = 6; /** * X轴度量值间隔 */ protected var _mXGap:Number; /** * Y轴度量值间隔 */ protected var _mYGap:Number; /** * 暂存X轴刻度数据 */ protected var _mXCachedTicks:Vector.<Number> /* 数字 */ = null; /** * 暂存X轴数据,累计刻度值 */ protected var _mXCacheValueTicks:Vector.<Number> /* 数字 */ = null; /** * X轴刻度相关，距离为1像素，暂时不给外部输入，无关紧要，setter和getter方法注销掉了 */ protected var _mPadding:Number = 1; /** * Y刻度缓存数组 */ protected var _mYCachedTicks:Vector.<Number> = null; /** * Y轴的最大值 */ protected var _mYMaxValue:Number; /** * 当前Y轴光标索引 */ protected var _countIndexY:int = 0; /** * 检查数据是否为空，true表示数据不为空 */ protected var _checkData:Boolean = true; /** * 直方图数量 */ protected var _mHBarNum:int; /** * X轴 */ private var _mXis:Group; /** * Y轴 */ private var _mYis:Group; /** * 直方图上方的数据刷新显示区域 */ private var _mHBarIDLable:Group; /** * Y轴上ID标签的高度 */ protected var _mHBarIDLableHeight:int = 25; /** * 网格 */ private var _gridLines:Group; /** * 主要数据显示区域 */ private var _mMainHDraw:Group; /** * 事件监听层 */ private var _mEventGroup:Group; /** * 是否为刷新 */ protected var _isReflash:Boolean = true; /** * 浮动框外层 */ private var floatDataPanel:BorderContainer; /** * 浮动框内层 */ private var floatInerPanel:BorderContainer; /** * 浮动框内层显示的内容 */ private var vLabel1: Text= new Text(); //=========================== // 控件内部使用属性，不需要外部传值end //=========================== public function MultilayerHorizontalBarChart() { super(); } override protected function createChildren():void { super.createChildren(); if (_mXis == null) { _mXis = new Group(); addChild(_mXis); } if (_mYis == null) { _mYis = new Group(); addChild(_mYis); } if (_mHBarIDLable == null ) { _mHBarIDLable = new Group(); addChild(_mHBarIDLable); } if (_gridLines == null) { _gridLines = new Group(); addChild(_gridLines); } if (_mMainHDraw == null) { _mMainHDraw = new Group(); addChild(_mMainHDraw); } if (_mEventGroup == null){ _mEventGroup = new Group(); addChild(_mEventGroup); _mEventGroup.addEventListener(MouseEvent.MOUSE_OUT, deleDataHandler); _mEventGroup.addEventListener(MouseEvent.MOUSE_MOVE,showDataHandler); } if (mFloatIsShow) { if (floatDataPanel == null) { floatDataPanel = new BorderContainer(); floatInerPanel = new BorderContainer(); floatDataPanel.setStyle("cornerRadius",15); floatInerPanel.setStyle("cornerRadius",15); var vs:SolidColor = new SolidColor(); vs.color = 0x6A726B; vs.alpha = 0.3; floatDataPanel.backgroundFill = vs; floatDataPanel.visible = false; _mEventGroup.addElement(floatDataPanel); } } } override protected function commitProperties():void { super.commitProperties(); //显示浮动窗口 if (mFloatIsShow) { var vsIner:SolidColor = new SolidColor(); vsIner.color = 0x000000; vsIner.alpha = 0.8; var vver:VerticalLayout = new VerticalLayout(); vver.paddingBottom = 2; vver.paddingLeft = 2; vver.paddingRight = 2; vver.paddingTop =2; floatDataPanel.layout = vver; floatInerPanel.backgroundFill = vsIner; floatInerPanel.setStyle("color",0xFFFFFF); floatInerPanel.addElement(vLabel1); vLabel1.horizontalCenter = 0; floatDataPanel.addElement(floatInerPanel); floatInerPanel.move(2,2); floatDataPanel.setActualSize(200,vLabel1.height+50); floatInerPanel.setActualSize(vLabel1.width,vLabel1.height); } } override protected function measure():void { super.measure(); measuredMinHeight = measuredHeight = DEFAULT_HEIGHT; measuredMinWidth = measuredWidth = DEFAULT_WIDTH; } override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { if (_isReflash) { super.updateDisplayList(unscaledWidth, unscaledHeight); if (dataProvider == null) { return; } for (var i:int = 0; i < dataProvider.ColumnName.length; i++) { //如果存在空数据就设定标识退出循环 if (null == dataProvider.Data[dataProvider.ColumnName[i]]) { _checkData = false; break; } } if (_checkData) { drawLayouts(unscaledWidth,unscaledHeight); drawXAxis(); drawYAxis(); drawGrid(); legendHBarLine(); drawHBar(); } _isReflash = false; } } /** * 安排布局 */ protected function drawLayouts(pW:Number, pH:Number):void { this._mXis.setActualSize(pW - this.mYAxisWidth, this.mXAxisHeight); _mXis.move(this.mYAxisWidth, pH - this.mXAxisHeight); this._mYis.setActualSize(this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mYis.move(0,this.mHBarIDLableHeight); //X轴标签位置 this._mHBarIDLable.setActualSize(pW - this.mYAxisWidth, this.mHBarIDLableHeight); this._mHBarIDLable.move(this.mYAxisWidth, -10); this._gridLines.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._gridLines.move(this.mYAxisWidth, this.mHBarIDLableHeight); this._mMainHDraw.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mMainHDraw.move(this.mYAxisWidth, this.mHBarIDLableHeight); this._mEventGroup.setActualSize(pW - this.mYAxisWidth, pH - this.mXAxisHeight - this.mHBarIDLableHeight); this._mEventGroup.move(this.mYAxisWidth, this.mHBarIDLableHeight); } /** * 画百分比X轴 */ protected function drawXAxis():void { var _mXMaxValue:Number =100; // TODO Auto Generated method stub var vGroup:Group = this._mXis; var vG:Graphics = vGroup.graphics; vGroup.removeAllElements(); vG.clear(); vG.lineStyle(1, 0x000000,0.8); vG.moveTo(0, 0); vG.lineTo(vGroup.width,0); _mXCachedTicks = new Vector.<Number>(); _mXCacheValueTicks = new Vector.<Number>(); //将X轴分成xbisectNum等份 默认为10 var vCount:int = xBisectNum; var vGap:Number = vGroup.width / vCount; var vGapValue:Number = _mXMaxValue / vCount; var vNum:Number; var vX:Number for(var i:int=0; i <= vCount; i++){ vX = i * vGap; vG.moveTo(vX, 0); vG.lineTo(vX,6); _mXCachedTicks.push(vX); var vTextField:Text = new Text(); vNum = i*vGapValue; vTextField.text = vNum.toString() + "%"; var vTlm:TextLineMetrics = measureText(vTextField.text); vTextField.move( vX - vTlm.width / 2, 10); vGroup.addElement(vTextField); } vGroup = null; vG = null; } /** * 画Y轴 */ protected function drawYAxis():void { var vGroup:Group = this._mYis; var vG:Graphics = vGroup.graphics; vGroup.removeAllElements(); vG.clear(); vG.lineStyle(1, 0x000000,0.8); vG.moveTo(vGroup.width, 0); vG.lineTo(vGroup.width, vGroup.height); _mYCachedTicks = new Vector.<Number>(); //Y轴数据的个数 var vCount:int = this.dataProvider.RowCount; var vGap:Number = vGroup.height / vCount; //存储Y轴刻度高度，供之后画图使用 this._mYGap = vGap; vG.moveTo(vGroup.width - 6, 0); vG.lineTo(vGroup.width, 0); for (var i:int = 0; i <= vCount; i++) { var vY:Number = (i) * vGap; vG.moveTo(vGroup.width-6, vY); vG.lineTo(vGroup.width, vY); _mYCachedTicks.push(vY); var vTextField:Label = new Label(); if (i < vCount) { //把Y轴的显示的标签加上 vTextField.text = this.dataProvider.Data[categoryField][i]; var vTlm:TextLineMetrics = measureText(vTextField.text); vTextField.move(vGroup.width - vTlm.width - 20, vY + vGap/2 - vTlm.height / 2); vGroup.addElement(vTextField); } } vGroup = null; vG = null; } /** * 画网格 */ protected function drawGrid():void { var vGroup:Group = _gridLines; var vG:Graphics = vGroup.graphics; vG.clear(); var vColor:uint = 0xBFBFBF; var vAlpha:Number = 0.3; vG.lineStyle(1, vColor, vAlpha); var vLen:Number; var vPoint:Point; var i:int; var pos:int; //画横线 if (_mYCachedTicks && _mYCachedTicks.length > 0) { vLen = vGroup.width / 10; var vgHeight:Number; for (i = 0; i < _mYCachedTicks.length - 1; i++) { vgHeight = _mYCachedTicks[i]; for (pos = 0; pos < vLen; pos++) { vG.moveTo(pos * 10, vgHeight); vG.lineTo(pos * 10 + 6, vgHeight); } } } //画竖线 if (_mXCachedTicks && _mXCachedTicks.length > 0) { vLen = vGroup.height / 10; var vMax:int = _mXCachedTicks.length; for (i = 1; i < vMax; i++) { var vWidth:Number = _mXCachedTicks[i]; for (pos = 0; pos < vLen; pos++) { vG.moveTo(vWidth, pos * 10); vG.lineTo(vWidth, pos * 10 + 6); } } } } /** * 画数据标签提示 */ protected function legendHBarLine():void { var vGroup:Group = this._mHBarIDLable; var vIDLableLen:Number = vGroup.width/this._mHBarCenNum; var vGap:Number = vIDLableLen / 6; var vHLineLen:Number = vGap*0.6; var vHY:Number = vGroup.height /2; var vG:Graphics =vGroup.graphics; _mHBarIDLable.removeAllElements(); vG.clear(); var vLBuffef:Number = 0; for(var i:int=0; i < this._mHBarCenNum; i++) { var vName:Label = new Label(); vG.lineStyle(0.2, this.mHBarColorArray[i%this.mHBarColorArray.length]); //对颜色数组取余可防止颜色数组不足时index越界 vG.beginFill(mHBarColorArray[i]); vG.drawRect(vLBuffef,vHY,vHLineLen,vHLineLen); vG.endFill(); vName.text = this.dataProvider.ColumnName[i+1]; vName.x = vLBuffef + vHLineLen; vName.y = vHY/2; _mHBarIDLable.addElement(vName); vLBuffef += vIDLableLen; } vGroup = null; vG = null; } /** * 画直方图 */ protected function drawHBar():void { //矩形高度 var vHBarHeight:Number = this._mYGap * 2 / 5; _mMainHDraw.removeAllElements(); var vGroup:Group = this._mMainHDraw; vGroup.removeAllElements(); var vG:Graphics = vGroup.graphics; vG.clear(); var vColumnNameTemp:String = null; //从左到右从上到下画矩形 var columnLen:int = this.dataProvider.ColumnName.length; //用来存放遍历到的主要数据 var vValue:Number = 0; for(var vIndex:int = 0; vIndex < this.dataProvider.RowCount; vIndex++) { //累积的矩形宽度，最长不能超过100% var vSumWidth:Number = 0; //第一个数组0放的是Y轴标签，直接略过 for(var vColumnIndex:int = 1; vColumnIndex < columnLen; vColumnIndex++) { vColumnNameTemp = this.dataProvider.ColumnName[vColumnIndex]; //vColumnIndex是从1开始的，跳过“yAxisData”字段，这里要减去1 var vColor:uint = this.mHBarColorArray[(vColumnIndex-1) % this.mHBarColorArray.length]; vValue = Number(this._mPercentData[vColumnNameTemp][vIndex]); if( vSumWidth>1) { vSumWidth = 1; } vG.beginFill(vColor); vG.drawRect(vSumWidth*this._mMainHDraw.width, this._mYCachedTicks[vIndex] + this._mYGap/2 - vHBarHeight/2 , vValue*this._mMainHDraw.width, vHBarHeight); vG.endFill(); vSumWidth += vValue; } } vGroup = null; vG = null; } /** * 显示数据处理 * @param pEvent * */ protected function showDataHandler(pEvent:MouseEvent):void { countIndexY = int(pEvent.localY / this._mYGap); //第几个柱子 if (countIndexY >= this._mHBarNum) { return; } //鼠标光标在柱子上时候，柱子高度占刻度值的1/3 if (pEvent.localY > (countIndexY+1.5/5) * this._mYGap && pEvent.localY < (countIndexY + 3.5 / 5) * this._mYGap) { //如果显示浮动框，要设置好位置，防止出界 if (mFloatIsShow) { // trace("Y:" + pEvent.localY + "X:" + pEvent.localX); if (pEvent.localY > this._mMainHDraw.height - floatDataPanel.height- 10 ) { if (pEvent.localX > this._mMainHDraw.width - floatDataPanel.width) { floatDataPanel.move(pEvent.localX - floatDataPanel.width, pEvent.localY -floatDataPanel.height-10); } else { floatDataPanel.move(pEvent.localX , pEvent.localY -floatDataPanel.height-10); } } else { if (pEvent.localX > this._mMainHDraw.width - floatDataPanel.width) { floatDataPanel.move(pEvent.localX - floatDataPanel.width, pEvent.localY + 10); } else { floatDataPanel.move(pEvent.localX, pEvent.localY +10); } } updHBarLabelData(countIndexY,pEvent.localX); } } else { updHBarLabelData(-1,0); } } /** * 更新显示数据 * @param mHBarIndexY 当前是第几个柱子 * @param pMouseX 鼠标的位置 */ protected function updHBarLabelData(mHBarIndexY:int, pMouseX:Number):void { if (mHBarIndexY == -1) { if(mFloatIsShow) { floatDataPanel.visible = false; } } else { //防止数组越界 if (mHBarIndexY < this.dataProvider.RowCount) { var vDataString:String = "XXX"; var vSourceDataString:String = "XX"; var vColumnName:String = "OO"; var vSumNum:Number = 0; //累计柱子各段长百分比 var vSumNumArr:Array = new Array(); //累计柱子各段长百分比数组，用来判断光标在那段柱子上 vSumNumArr[0] = vSumNum; var vIndex:int = 1; for each(var vItem:String in this.dataProvider.ColumnName) { //categoryField字段是Y轴标签，这里跳过 if (categoryField != vItem) { vSumNum += this._mPercentData[vItem][mHBarIndexY]; vSumNumArr[vIndex] = vSumNum; //找到对应的区间 if (vSumNumArr[vIndex - 1] * this._mMainHDraw.width < pMouseX && pMouseX <= vSumNumArr[vIndex] * this._mMainHDraw.width) { vColumnName = vItem; vSourceDataString = this.dataProvider.Data[vItem][mHBarIndexY].toString(); vDataString = percentDataFormatter(this._mPercentData[vItem][mHBarIndexY] * 100); break; } vIndex++; } } if (mFloatIsShow) { if (this.mChartName != null && this._mYUnit != null) { vLabel1.text = this.dataProvider.Data[categoryField][mHBarIndexY] + this._mYUnit + " " +vColumnName + " " + this.mChartName + " : " +vDataString + "(" + vSourceDataString + "/" + this._mRowSumArray[mHBarIndexY] + ")"; } else { vLabel1.text = this.dataProvider.Data[categoryField][mHBarIndexY] + " : " +vDataString + "(" + vSourceDataString + "/" + this._mRowSumArray[mHBarIndexY] + ")"; } vLabel1.horizontalCenter = 0; vLabel1.verticalCenter = 0; //获取鼠标所在的柱子的颜色 var vHFloatColor:uint = this.mHBarColorArray[(this.dataProvider.ColumnName.indexOf(vColumnName)-1)%this.mHBarColorArray.length]; changeFloatBackColor(vHFloatColor); floatDataPanel.visible = true; } } } } /** * * 鼠标移除事件 */ protected function deleDataHandler(pEvent:MouseEvent):void { removeEventListener(MouseEvent.MOUSE_MOVE,showDataHandler); if (mFloatIsShow) { floatDataPanel.visible = false; } } /** * 动态改变浮动框背景 **/ protected function changeFloatBackColor(pColor:uint):void { var vs:SolidColor = new SolidColor(); vs.color = pColor; vs.alpha = 0.8; floatInerPanel.backgroundFill = vs; } /** * 将传入的数值格式化为百分比形式 * @param pNumber 要格式化的数值 * @return 以百分比形式显示的字符串 * */ protected function percentDataFormatter(pNumber:Number):String { var vNumber:Number = pNumber; return vNumber.toFixed(2) + "%"; } //=========================== // 属性定义的setter和getter方法start //=========================== /** * X轴的高度 */ public function get mXAxisHeight():Number { return _mXAxisHeight; } public function set mXAxisHeight(value:Number):void { _mXAxisHeight = value; } /** * Y轴宽度 * @return */ public function get mYAxisWidth():Number { return _mYAxisWidth; } public function set mYAxisWidth(value:Number):void { _mYAxisWidth = value; } /** * 当前光标Y轴索引 * @return */ public function get countIndexY():int { return _countIndexY; } public function set countIndexY(value:int):void { _countIndexY = value; } /** * 直方图上方标签的高度 * @return _mHBarIDLableHeight; */ public function get mHBarIDLableHeight():int { return _mHBarIDLableHeight; } public function set mHBarIDLableHeight(value:int):void { _mHBarIDLableHeight = value; } /** * 数据源 * @return _dataProvider; */ public function get dataProvider():DataTable { return _dataProvider; } public function set dataProvider(value:DataTable):void { this._dataProvider = value; this._mHBarNum = this.dataProvider.RowCount; this._mHBarCenNum = this.dataProvider.ColumnName.length -1; this._mRowSumArray = new Array(this._mHBarNum); var vIndex:int = 0; //统计个行数据的和，并把它存放进总和数组 for (var i:int = 0; i < this.dataProvider.RowCount; i++) { var vSum:Number = 0; for each (var vItem:String in this.dataProvider.ColumnName) { //统计各行数据的和 if (vItem != this.categoryField) { vSum += Number(this.dataProvider.Data[vItem][i]) ; } } this._mRowSumArray[vIndex] = vSum; vIndex ++; } //把dataTable的Data数据转换成相对应的百分比 this._mPercentData = new Dictionary(); for each (var vItem1:String in this.dataProvider.ColumnName) { if (vItem1 != this.categoryField) { this._mPercentData[vItem1] = new Array(); for (var j:int = 0; j < this.dataProvider.RowCount; j++) { this._mPercentData[vItem1][j] = Number(this.dataProvider.Data[vItem1][j]) / this._mRowSumArray[j]; } } } this.invalidateDisplayList(); } /** * 字段参数 默认为“yAxisData” * @return _categoryField; */ public function get categoryField():String { return _categoryField; } public function set categoryField(value:String):void { _categoryField = value; } /** * 是否显示悬浮框 * @return _mFloatIsShow; */ public function get mFloatIsShow():Boolean { return _mFloatIsShow; } /** * @private */ public function set mFloatIsShow(value:Boolean):void { _mFloatIsShow = value; } /** * X轴单位 * @return _mXUnit; */ public function get mXUnit():String { return _mXUnit; } /** * @private */ public function set mXUnit(value:String):void { _mXUnit = value; } /** * 左边Y轴单位 * @return _mYUnit; */ public function get mYUnit():String { return _mYUnit; } /** * @private */ public function set mYUnit(value:String):void { _mYUnit = value; } /** * 等分值，把X轴设成多少等分，默认为10 */ public function get xBisectNum():int { return _xBisectNum; } /** * @private */ public function set xBisectNum(value:int):void { _xBisectNum = value; } /** * 图标名称 */ public function get mChartName():String { return _mChartName; } /** * @private */ public function set mChartName(value:String):void { _mChartName = value; } /** * 颜色数组 */ public function get mHBarColorArray():Array { return _mHBarColorArray; } /** * @private */ public function set mHBarColorArray(value:Array):void { _mHBarColorArray = value; } //=========================== // 属性定义的setter和getter方法end //=========================== } }
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