flex学习笔记-DataGrid,ComboBox
事件：父页面添加监听子页面触发这个时候需要设置监听的第三个参数为true
<!--flex4画线--><s:Spacer height="100%"/><s:Line width="100%"><s:stroke><s:SolidColorStroke color="0x000000" weight="1" caps="square"/></s:stroke></s:Line><mx:DataGrid width="100%" height="100%" dataProvider="{list}"><mx:columns><mx:DataGridColumn dataField="VEHICLE_LOCATION" headerText="位置"/><mx:DataGridColumn dataField="VEHICLE_STATUS" headerText="状态"/><mx:DataGridColumn headerText="时间" labelFunction="myLabelFunctionDG"/><mx:DataGridColumn dataField="GPS_SPEED" headerText="速度"/><mx:DataGridColumn dataField="GPS_DIRECTION" headerText="方向"/></mx:columns></mx:DataGrid><s:ComboBox id="category" dataProvider="{list}" width="200"labelFunction="myLabelFunction"keyUp="setNextFocus_keyUpHandler(event)" change="category_changeHandler(event)" />protected function setNextFocus_keyUpHandler(event:KeyboardEvent):void{if (event.keyCode == Keyboard.ENTER){focusManager.setFocus(focusManager.getNextFocusManagerComponent());}}protected function enter_keyUpHandler(event:KeyboardEvent):void{if (event.keyCode == Keyboard.ENTER){event.target.dispatchEvent(new MouseEvent(MouseEvent.CLICK));}}protected function category_changeHandler(event:IndexChangeEvent):void{if(-3 == event.newIndex){category.selectedIndex = event.oldIndex;}}private function myLabelFunction(item:Object):String{if(null == item || instanceOf(String).matches(item)){item = category.dataProvider.getItemAt(category.selectedIndex);}return item.value+"_"+item.label;}private function myLabelFunctionDG(item:Object, column:DataGridColumn):String{var track:TrackModel = item as TrackModel;return Util.dateFormat(track.CREATE_TIME, Util.FORMAT_FULL);}package{import flash.events.Event;import flash.events.EventDispatcher;/**事件管理类，负责总事件的分发*/public class EventBus extends EventDispatcher{public function EventBus(){if(manager) throw new Error("EventBus is must be singleton!");}private static var manager:EventBus;public static function getInstance():EventBus{if(!manager)manager = new EventBus();return manager;}public function dispatch(type:String):Boolean{return dispatchEvent(new Event(type));}}}package{import flash.events.Event;/**自定义事件，可以在data属性传递一个object值*/public class AppEvent extends Event{/**登录成功事件*/public static const LOGIN_SUCCESS:String = "loginSuccess";/**登录失败事件*/public static const LOGIN_FAULT:String = "loginFault";/**注册成功事件*/public static const REGISTER_SUCCESS:String = "registerSuccess";/**注册失败事件*/public static const REGISTER_FAULT:String = "registerFault";/**关闭弹出窗口事件*/public static const TITLE_WINDOW_CLOSE:String = "menuTitleWindowClose";/**地图加载完毕事件*/public static const MAP_LOADED:String = "googleMapLoaded"; public function AppEvent(type:String, data:Object = null, callback:Function = null) { super(type, false, false); _data = data; _callback = callback; } private var _data:Object; private var _callback:Function; public function get data():Object { return _data; } public function set data(value:Object):void { _data = value; } public function get callback():Function { return _callback; } public function set callback(value:Function):void { _callback = value; } public override function clone():Event { return new AppEvent(this.type, this.data); }}}