config.xml文件的配置如下：

<widget left="10" top="50" config="widgets/Navigation/NavigationWidget.xml" url="widgets/Navigation/NavigationWidget.swf" />

源代码目录如下：

地图导航控件模块的源代码原理解析，详细的代码在下载的开源flexviewer自带的：

1.地图缩小

2.地图放大

3.地图漫游

4.地图缩放级别工具

5.前视图，后视图

6.向下平移

7.向右平移

8.向上平移

9.向左平移

10.全图

大概的思路如下：NavigationWidget.xml是导航控件的配置文件，NavigationWidget.mxml是widget，里面引用地图导航控件Navigation.mxml，然后Navigation.mxml控件里面具体定义界面如何布局的，布局看上面的截图，，Navigation.mxml里面的布局设计引用了很多其他的皮肤组件组成，用来渲染颜色的，比如，nButtonSkin.mxml、neButtonSkin.mxml等等。

（1）NavigationWidget.xml

<?xml version="1.0" ?> <configuration> <!-- 地图全图属性以及的图标设置 --> <panwheel visible="true" fullexticon="assets/images/i_globe.png" /> <!-- 地图上视图属性设置--> <prevextbutton visible="true"/> <!-- 地图下视图属性设置--> <nextextbutton visible="true"/> <!-- 地图移动属性以及图标的设置--> <panbutton visible="true" icon="assets/images/i_pan.png" /> <!-- 地图放大属性以及图标设置--> <zoominbutton visible="true" icon="assets/images/i_zoomin.png" /> <!-- 地图缩小属性以及图标设置--> <zoomoutbutton visible="true" icon="assets/images/i_zoomout.png" /> </configuration>

(2)NavigationWidget.mxml

<?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:viewer="com.esri.viewer.*" xmlns:Navigation="widgets.Navigation.*" initialize="basewidget_initializeHandler(event)" widgetConfigLoaded="init()"> <fx:Declarations> <!--设置动画效果，淡入的透明度--> <s:Fade target="{navigation}"/> <!--设置动画效果，淡出的透明度--> <s:Fade target="{navigation}"/> </fx:Declarations> <fx:Script> <![CDATA[ import com.esri.viewer.AppEvent; import mx.events.FlexEvent; private var buttonBarLastSelectedIndex:int; protected function basewidget_initializeHandler(event:FlexEvent):void { AppEvent.addListener(AppEvent.DATA_PUBLISH, sharedDataUpdated);//widget加载初始化时候触发事件 } private function sharedDataUpdated(event:AppEvent):void { var data:Object = event.data; if (data.key == "Edit_Widget") // 在线编辑工具打开状态下，导航的工具下面按钮禁用 { if (data.collection[0]) { map.cursorManager.removeAllCursors(); buttonBarLastSelectedIndex = navigation.btnBar.selectedIndex; navigation.btnBar.selectedIndex = 0; navigation.btnBar.enabled = false; } else { navigation.btnBar.selectedIndex = buttonBarLastSelectedIndex; navigation.btnBar.enabled = true; } } } private function init():void { //下面是widget初始化函数，为了读取配置文件xml数据 if (configXML) { var rollOverAlpha:Number = configXML.rolloveralpha[0] ? parseFloat(configXML.rolloveralpha) : 1;//设置动画效果的透明度 var rollOutAlpha:Number = configXML.rolloutalpha[0] ? parseFloat(configXML.rolloutalpha) : 0.39; rollOutFade.alphaTo = rollOutAlpha; rollOverFade.alphaTo = rollOverAlpha; navigation.alpha = rollOutAlpha;//导航控件的透明度 navigation.visible = true;//设置导航控件可见 navigation.panwheelItem = new NavToolItem("PanWheel", "", configXML.panwheel.@visible == ‘true‘);//导航控件的漫游菜单 navigation.zoomFullextItem = new NavToolItem(configXML.panwheel.@fullextlabel || getDefaultString("fullExtentLabel"), configXML.panwheel.@fullexticon, true);//导航控件的全图菜单 navigation.pandownItem = new NavToolItem(configXML.panwheel.@pandownlabel || getDefaultString("panDownLabel"), "", true);//导航控件的向下菜单 navigation.panleftItem = new NavToolItem(configXML.panwheel.@panleftlabel || getDefaultString("panLeftLabel"), "", true);//导航控件的向左菜单 navigation.panrightItem = new NavToolItem(configXML.panwheel.@panrightlabel || getDefaultString("panRightLabel"), "", true);//导航控件的向右菜单 navigation.panupItem = new NavToolItem(configXML.panwheel.@panuplabel || getDefaultString("panUpLabel"), "", true);//导航控件的向上菜单 navigation.prevextItem = new NavToolItem(configXML.prevextbutton.@label || getDefaultString("previousExtentLabel"), "", configXML.prevextbutton.@visible == ‘true‘);//导航控件的前视图菜单 navigation.nextextItem = new NavToolItem(configXML.nextextbutton.@label || getDefaultString("nextExtentLabel"), "", configXML.nextextbutton.@visible == ‘true‘);//导航控件的后视图菜单 navigation.panItem = new NavToolItem(configXML.panbutton.@label || getDefaultString("panLabel"), configXML.panbutton.@icon, configXML.panbutton.@visible == ‘true‘); navigation.zoominItem = new NavToolItem(configXML.zoominbutton.@label || getDefaultString("zoomInLabel"), configXML.zoominbutton.@icon, configXML.zoominbutton.@visible == ‘true‘);//导航控件的放大菜单 navigation.zoomoutItem = new NavToolItem(configXML.zoomoutbutton.@label || getDefaultString("zoomOutLabel"), configXML.zoomoutbutton.@icon, configXML.zoomoutbutton.@visible == ‘true‘);//导航控件的缩小菜单 navigation.initButtonBar();//加载导航控件的菜单 } } ]]> </fx:Script> <!--引用自定义地图导航控件--> <Navigation:Navigation focusIn="rollOverFade.play()" focusOut="rollOutFade.play()" includeInLayout="false" map="{map}" rollOut="rollOutFade.play()" rollOver="rollOverFade.play()" visible="false"/> </viewer:BaseWidget>

（3）Navigation.mxml