使用Flex+Cairngorm+AIR制作列车时刻表查询工具[连载三]

然后我们来建立命令，分别由按照列车车次检索和目的地检索的按钮事件来调用，然后在前端控制器中配置：

编写命令

GetStationDetailCommand.as

  1. package com.example.command
  2. {
  3. 	import com.adobe.cairngorm.commands.ICommand;
  4. 	import com.adobe.cairngorm.control.CairngormEvent;
  5. 	import com.example.business.TrainDelegateWS;
  6. 	import com.example.business.TrainDelegateDB;
  7. 	import com.example.event.SearchByStationEvent;
  8. 	import com.example.model.TrainModelLocator;
  9.  
  10. 	import mx.collections.ArrayCollection;
  11. 	import mx.controls.Alert;
  12. 	import mx.rpc.IResponder;
  13. 	import mx.rpc.events.FaultEvent;
  14.  
  15. 	public class GetStationDetailCommand implements ICommand, IResponder
  16. 	{
  17. 		private var modelLocator:TrainModelLocator = TrainModelLocator.getInstance();
  18. 		private var deaultNS:Namespace = new Namespace("http://WebXml.com.cn/");
  19. 		private var diffNS:Namespace = new Namespace("diffgr","urn:schemas-microsoft-com:xml-diffgram-v1");
  20. 		public function execute( event : CairngormEvent ): void {
  21. 			var searchEvent:SearchByStationEvent = SearchByStationEvent(event);
  22. 			modelLocator.startStation = searchEvent.start;
  23. 			modelLocator.arriveStation = searchEvent.end;
  24. 			switch(modelLocator.currentService) {
  25. 				case "webService":
  26. 					var delegate : TrainDelegateWS = new TrainDelegateWS(this);
  27. 					delegate.getStationDetail();
  28. 				break;
  29. 				case "dataBase":
  30. 					var delegateDB : TrainDelegateDB = new TrainDelegateDB(this);
  31. 					delegateDB.getStationDetail();
  32. 				break;
  33. 			}
  34. 		}
  35.  
  36. 		public function result( event : Object ) : void {
  37. 			default xml namespace = deaultNS;
  38. 			var resultXML:XML = new XML(event.result.toString());
  39. 			var resultList:XMLList = resultXML.getStationAndTimeByStationNameResult.diffNS::diffgram.getStationAndTime.TimeTable;
  40. 			var model : TrainModelLocator = TrainModelLocator.getInstance();
  41. 			model.currentStaionList.trainStationList = new ArrayCollection();
  42. 			var count:uint = 1;
  43. 			for each(var item:XML in resultList) {
  44. 				var nodeItem:Object = new Object();
  45. 				nodeItem.num = count;
  46. 				count++;
  47. 				nodeItem.TrainCode = item.TrainCode;
  48. 				nodeItem.FirstStation = item.FirstStation;
  49. 				nodeItem.LastStation = item.LastStation;
  50. 				nodeItem.StartStation = item.StartStation;
  51. 				nodeItem.StartTime = item.StartTime;
  52. 				nodeItem.ArriveStation = item.ArriveStation;
  53. 				nodeItem.ArriveTime = item.ArriveTime;
  54. 				nodeItem.KM = item.KM;
  55. 				nodeItem.UseDate = item.UseDate;
  56. 				model.currentStaionList.trainStationList.addItem(nodeItem);
  57. 			}
  58. 			model.currentState = "resultByStationList";
  59. 		}
  60.  
  61. 		public function fault( event : Object ) : void {
  62. 			var faultEvent : FaultEvent = FaultEvent( event );
  63. 			Alert.show("Train could not be retrieved!");
  64. 		}
  65.  
  66. 	}
  67. }

GetTrainDetailCommand.as

  1. package com.example.command
  2. {
  3. 	import com.adobe.cairngorm.commands.ICommand;
  4. 	import com.adobe.cairngorm.control.CairngormEvent;
  5. 	import com.example.business.TrainDelegateWS;
  6. 	import com.example.business.TrainDelegateDB;
  7. 	import com.example.event.SearchByTrainNameEvent;
  8. 	import com.example.model.TrainModelLocator;
  9.  
  10. 	import mx.collections.ArrayCollection;
  11. 	import mx.controls.Alert;
  12. 	import mx.rpc.IResponder;
  13. 	import mx.rpc.events.FaultEvent;
  14.  
  15. 	public class GetTrainDetailCommand implements ICommand, IResponder
  16. 	{
  17. 		private var modelLocator:TrainModelLocator = TrainModelLocator.getInstance();
  18. 		private var deaultNS:Namespace = new Namespace("http://WebXml.com.cn/");
  19. 		private var diffNS:Namespace = new Namespace("diffgr","urn:schemas-microsoft-com:xml-diffgram-v1");
  20. 		public function execute( event : CairngormEvent ): void {
  21. 			var searchEvent:SearchByTrainNameEvent = SearchByTrainNameEvent(event);
  22. 			modelLocator.currentTrain.name = searchEvent.trainName;
  23. 			switch(modelLocator.currentService) {
  24. 				case "webService":
  25. 					var delegate : TrainDelegateWS = new TrainDelegateWS(this);
  26. 					delegate.getTrainDetail();
  27. 				break;
  28. 				case "dataBase":
  29. 					var delegateDB : TrainDelegateDB = new TrainDelegateDB(this);
  30. 					delegateDB.getTrainDetail();
  31. 				break;
  32. 			}
  33. 		}
  34.  
  35. 		public function result( event : Object ) : void {
  36. 			default xml namespace = deaultNS;
  37. 			var resultXML:XML = new XML(event.result.toString());
  38. 			var resultList:XMLList = resultXML.getDetailInfoByTrainCodeResult.diffNS::diffgram.getDetailInfo.TrainDetailInfo;
  39.  
  40. 			var model : TrainModelLocator = TrainModelLocator.getInstance();
  41. 			model.currentTrain.journey = new ArrayCollection();
  42. 			var count:uint = 1;
  43. 			for each(var item:XML in resultList) {
  44. 				var nodeItem:Object = new Object();
  45. 				nodeItem.num = count;
  46. 				count++;
  47. 				nodeItem.TrainStation = item.TrainStation;
  48. 				nodeItem.ArriveTime = item.ArriveTime;
  49. 				nodeItem.StartTime = item.StartTime;
  50. 				nodeItem.KM = item.KM;
  51. 				model.currentTrain.journey.addItem(nodeItem);
  52. 			}
  53. 			model.currentState = "resultByTrainName";
  54. 		}
  55.  
  56. 		public function fault( event : Object ) : void {
  57. 			var faultEvent : FaultEvent = FaultEvent( event );
  58. 			Alert.show("Train could not be retrieved!");
  59. 		}
  60.  
  61. 	}
  62. }

前端控制器

然后让我们来完成前端控制器，这里比较简单，就是映射两个事件到相应的命令上：

TrainController.as

  1. package com.example.control
  2. {
  3. 	import com.adobe.cairngorm.control.FrontController;
  4. 	import com.example.command.*;
  5. 	import com.example.event.SearchByTrainNameEvent;
  6. 	import com.example.event.SearchByStationEvent;
  7.  
  8. 	public class TrainController extends FrontController
  9. 	{
  10. 		public function TrainController() {
  11. 			initialiseCommands();
  12. 		}
  13.  
  14. 		public function initialiseCommands() : void {
  15. 			addCommand( SearchByTrainNameEvent.SEARCH_BY_TRAIN_NAME, GetTrainDetailCommand);
  16. 			addCommand( SearchByStationEvent.SEARCH_BY_STATION, GetStationDetailCommand);
  17. 		}
  18.  
  19. 	}
  20. }

自定义事件

我们需要自定义事件的播放来触发命令的操作，这里我们建立两个自定义事件，分别对应两种搜索状态：

SearchByStationEvent.as

  1. package com.example.event
  2. {
  3. 	import flash.events.Event;
  4. 	import com.adobe.cairngorm.control.CairngormEvent;
  5. 	public class SearchByStationEvent extends CairngormEvent {
  6.  
  7. 		public static var SEARCH_BY_STATION : String = "searchByStation";
  8.  
  9. 		public var start : String;
  10. 		public var end : String;
  11.  
  12. 		public function SearchByStationEvent() {
  13. 			super(SEARCH_BY_STATION);
  14. 		}
  15.  
  16. 		override public function clone() : Event {
  17. 			return new SearchByStationEvent();
  18. 		}
  19.  
  20. 	}
  21. }

SearchByTrainNameEvent.as

  1. package com.example.event
  2. {
  3. 	import flash.events.Event;
  4. 	import com.adobe.cairngorm.control.CairngormEvent;
  5. 	public class SearchByTrainNameEvent extends CairngormEvent {
  6.  
  7. 		public static var SEARCH_BY_TRAIN_NAME : String = "searchByTrainName";
  8.  
  9. 		public var trainName : String;
  10.  
  11. 		public function SearchByTrainNameEvent() {
  12. 			super(SEARCH_BY_TRAIN_NAME);
  13. 		}
  14.  
  15. 		override public function clone() : Event {
  16. 			return new SearchByTrainNameEvent();
  17. 		}
  18.  
  19. 	}
  20. }

下一步实现数据模型：

TrainModelLocator.as

  1. package com.example.model
  2. {
  3. 	import com.adobe.cairngorm.model.ModelLocator;
  4. 	import com.example.vo.StationListVO;
  5. 	import com.example.vo.TrainVO;
  6.  
  7. 	[Bindable]
  8. 	public class TrainModelLocator implements ModelLocator {
  9.  
  10. 		private static var modelLocator : TrainModelLocator;
  11.  
  12. 		public static function getInstance() : TrainModelLocator {
  13. 			if ( modelLocator == null ) {
  14. 				modelLocator = new TrainModelLocator();
  15. 			}
  16. 			return modelLocator;
  17. 		}
  18.  
  19. 		public function TrainModelLocator() {
  20. 			if ( modelLocator != null ) {
  21. 				throw new Error( "Only one TrainModelLocator instance should be instantiated" );	
  22. 			}
  23. 		}
  24. 		//serviceConfig
  25. 		public var wsWSDL:String = "http://www.webxml.com.cn/WebServices/TrainTimeWebService.asmx?wsdl";
  26.  
  27. 		public var currentTrain : TrainVO = new TrainVO();
  28. 		public var currentStaionList : StationListVO = new StationListVO();
  29. 		public var currentService:String = "webService";
  30. 		public var startStation:String = "";
  31. 		public var arriveStation:String = "";
  32. 		//当前状态
  33. 		public var currentState:String = "";
  34.  
  35. 	}
  36. }

我们定义两个ValueObject类，用于保存按照两种搜索模式检索的返回结果：

StationListVO.as

  1. package com.example.vo
  2. {
  3. 	import com.adobe.cairngorm.vo.IValueObject;
  4.  
  5. 	import mx.collections.ArrayCollection;
  6.  
  7. 	[RemoteClass(alias="com.example.vo.StationListVO")]
  8. 	public class StationListVO implements IValueObject
  9. 	{
  10. 		//始发站
  11. 		[Bindable]
  12. 		public var startStation:String;
  13. 		//目的地
  14. 		[Bindable]
  15. 		public var endStation:String;
  16. 		//列车以及行程
  17. 		[Bindable]
  18. 		public var trainStationList:ArrayCollection;
  19. 	}
  20. }

TrainVO.as

  1. package com.example.vo
  2. {
  3. 	import com.adobe.cairngorm.vo.IValueObject;
  4.  
  5. 	import mx.collections.ArrayCollection;
  6.  
  7. 	[RemoteClass(alias="com.example.vo.TrainVO")]
  8. 	public class TrainVO implements IValueObject
  9. 	{
  10. 		//列车车次
  11. 		[Bindable]
  12. 		public var name:String;
  13. 		//列车行程，是一个数组，数组的每一项包含序号，车站,到达时间,发车时间,里程（公里）
  14. 		[Bindable]
  15. 		public var journey:ArrayCollection;
  16. 	}
  17. }

至此完成了编码工作，然后我们打开AIR的配置文件（TrainSchedule-app.xml），修改宽度和高度为（800*600），这样返回结果可以显示的更全面一些。

源码下载地址：

http://doc.riameeting.com/download/TrainSchedule.rar

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原文地址：https://www.cnblogs.com/zhuwenlubin/p/1868493.html