■ InvokeCommandAction 엘리먼트의 Command 속성을 사용해 명령을 실행하는 방법을 보여준다.
※ 비주얼 스튜디오에서 TestProject(Unpackaged) 모드로 빌드한다.
※ TestProject.csproj 프로젝트 파일에서 WindowsPackageType 태그를 None으로 추가했다.
▶ CommandManager.cs
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using System; using System.Collections.Generic; namespace TestProject; /// <summary> /// 명령 관리자 /// </summary> public class CommandManager { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 약한 참조 핸들러 추가하기 - AddWeakReferenceHandler(weakReferenceList, eventHandler) /// <summary> /// 약한 참조 핸들러 추가하기 /// </summary> /// <param name="weakReferenceList">약한 참조 리스트</param> /// <param name="eventHandler">이벤트 핸들러</param> public static void AddWeakReferenceHandler(ref List<WeakReference> weakReferenceList, EventHandler eventHandler) { if(weakReferenceList == null) { weakReferenceList = new List<WeakReference>(); } weakReferenceList.Add(new WeakReference(eventHandler)); } #endregion #region 약한 참조 핸들러 제거하기 - RemoveWeakReferenceHandler(weakReferenceList, eventHandler) /// <summary> /// 약한 참조 핸들러 제거하기 /// </summary> /// <param name="weakReferenceList">약한 참조 리스트</param> /// <param name="eventHandler">이벤트 핸들러</param> public static void RemoveWeakReferenceHandler(List<WeakReference> weakReferenceList, EventHandler eventHandler) { if(weakReferenceList != null) { for(int i = weakReferenceList.Count - 1; i >= 0; i--) { WeakReference weakReference = weakReferenceList[i]; EventHandler existingEventHandler = weakReference.Target as EventHandler; if((existingEventHandler == null) || (existingEventHandler == eventHandler)) { weakReferenceList.RemoveAt(i); } } } } #endregion #region 약한 참조 핸들러 호출하기 - CallWeakReferenceHandlers(weakReferenceList) /// <summary> /// 약한 참조 핸들러 호출하기 /// </summary> /// <param name="weakReferenceList">약한 참조 리스트</param> public static void CallWeakReferenceHandlers(List<WeakReference> weakReferenceList) { if(weakReferenceList != null) { EventHandler[] eventHandlerArray = new EventHandler[weakReferenceList.Count]; int count = 0; for(int i = weakReferenceList.Count - 1; i >= 0; i--) { WeakReference weakReference = weakReferenceList[i]; EventHandler eventHandler = weakReference.Target as EventHandler; if(eventHandler == null) { weakReferenceList.RemoveAt(i); } else { eventHandlerArray[count] = eventHandler; count++; } } for(int i = 0; i < count; i++) { EventHandler eventHandler = eventHandlerArray[i]; eventHandler(null, EventArgs.Empty); } } } #endregion } |
▶ DelegateCommand.cs
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using System; using System.Collections.Generic; using System.Windows.Input; namespace TestProject; /// <summary> /// 대리자 명령 /// </summary> /// <typeparam name="TParameter">매개 변수 타입</typeparam> public class DelegateCommand<TParameter> : ICommand { //////////////////////////////////////////////////////////////////////////////////////////////////// Event ////////////////////////////////////////////////////////////////////////////////////////// Public #region 실행 가능 여부 변경시 이벤트 - CanExecuteChanged /// <summary> /// 실행 가능 여부 변경시 이벤트 /// </summary> public event EventHandler CanExecuteChanged { add { CommandManager.AddWeakReferenceHandler(ref this.weakReferenceList, value); } remove { CommandManager.RemoveWeakReferenceHandler(this.weakReferenceList, value); } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 실행 액션 /// </summary> private readonly Action<TParameter> executeAction; /// <summary> /// 실행 가능 여부 함수 /// </summary> private readonly Func<TParameter, bool> canExecuteFunction; /// <summary> /// 약한 참조 리스트 /// </summary> private List<WeakReference> weakReferenceList; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - DelegateCommand(executeAction, canExecuteFunction) /// <summary> /// 생성자 /// </summary> /// <param name="executeAction">실행 액션</param> /// <param name="canExecuteFunction">실행 가능 여부 함수</param> public DelegateCommand(Action<TParameter> executeAction, Func<TParameter, bool> canExecuteFunction) { if(executeAction == null) { throw new ArgumentNullException("executeAction"); } this.executeAction = executeAction; this.canExecuteFunction = canExecuteFunction; } #endregion #region 생성자 - DelegateCommand(executeAction) /// <summary> /// 생성자 /// </summary> /// <param name="executeAction">실행 액션</param> public DelegateCommand(Action<TParameter> executeAction) : this(executeAction, null) { } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public #region 실행 가능 여부 구하기 - CanExecute(parameter) /// <summary> /// 실행 가능 여부 구하기 /// </summary> /// <param name="parameter">매개 변수</param> /// <returns>실행 가능 여부</returns> public bool CanExecute(TParameter parameter) { if(this.canExecuteFunction != null) { return this.canExecuteFunction(parameter); } return true; } #endregion #region 실행하기 - Execute(parameter) /// <summary> /// 실행하기 /// </summary> /// <param name="parameter">매개 변수</param> public void Execute(TParameter parameter) { if(this.executeAction != null) { this.executeAction(parameter); } } #endregion #region 실행 가능 여부 구하기 - ICommand.CanExecute(parameter) /// <summary> /// 실행 가능 여부 구하기 /// </summary> /// <param name="parameter">매개 변수</param> /// <returns>실행 가능 여부</returns> bool ICommand.CanExecute(object parameter) { if(parameter == null && typeof(TParameter).IsValueType) { return this.canExecuteFunction == null; } return CanExecute((TParameter)parameter); } #endregion #region 실행하기 - ICommand.Execute(parameter) /// <summary> /// 실행하기 /// </summary> /// <param name="parameter">매개 변수</param> void ICommand.Execute(object parameter) { Execute((TParameter)parameter); } #endregion #region 실행 가능 여부 변경시 이벤트 발생시키기 - RaiseCanExecuteChangedEvent() /// <summary> /// 실행 가능 여부 변경시 이벤트 발생시키기 /// </summary> public void RaiseCanExecuteChangedEvent() { FireCanExecuteChangedEvent(); } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Protected #region 실행 가능 여부 변경시 이벤트 발생시키기 - FireCanExecuteChangedEvent() /// <summary> /// 실행 가능 여부 변경시 이벤트 발생시키기 /// </summary> protected virtual void FireCanExecuteChangedEvent() { CommandManager.CallWeakReferenceHandlers(this.weakReferenceList); } #endregion } |
▶ MainPage.xaml
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<?xml version="1.0" encoding="utf-8"?> <Page x:Class="TestProject.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mxic="using:Microsoft.Xaml.Interactions.Core" xmlns:mxi="using:Microsoft.Xaml.Interactivity" xmlns:ctwa="using:CommunityToolkit.WinUI.Animations" xmlns:ctwb="using:CommunityToolkit.WinUI.Behaviors" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" FontFamily="나눔고딕코딩" FontSize="16"> <Button Name="startButton" HorizontalAlignment="Center" VerticalAlignment="Center" Width="200" Height="200" Content="애니메이션 시작"> <mxi:Interaction.Behaviors> <mxic:EventTriggerBehavior EventName="Click"> <ctwb:StartAnimationAction Animation="{x:Bind animationSet}" /> </mxic:EventTriggerBehavior> </mxi:Interaction.Behaviors> <ctwa:Explicit.Animations> <ctwa:AnimationSet x:Name="animationSet" IsSequential="True"> <ctwa:ScaleAnimation Duration="00:00:01" From="1" To="1.2"/> <ctwa:ScaleAnimation Duration="00:00:00.1" To="1" /> <mxi:Interaction.Behaviors> <ctwb:AnimationStartedTriggerBehavior> <mxic:InvokeCommandAction Command="{x:Bind ExecuteAnimationStartedCommand}" /> </ctwb:AnimationStartedTriggerBehavior> <ctwb:AnimationCompletedTriggerBehavior> <mxic:InvokeCommandAction Command="{x:Bind ExecuteAnimationCompletedCommand}" /> </ctwb:AnimationCompletedTriggerBehavior> </mxi:Interaction.Behaviors> </ctwa:AnimationSet> </ctwa:Explicit.Animations> </Button> </Page> |
▶ MainPage.xaml.cs
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using Microsoft.UI.Xaml.Controls; namespace TestProject; /// <summary> /// 메인 페이지 /// </summary> public sealed partial class MainPage : Page { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 애니메이션 시작시 실행 명령 - ExecuteAnimationStartedCommand /// <summary> /// 애니메이션 시작시 실행 명령 /// </summary> public DelegateCommand<object> ExecuteAnimationStartedCommand { get; private set; } #endregion #region 애니메이션 종료시 실행 명령 - ExecuteAnimationCompletedCommand /// <summary> /// 애니메이션 종료시 실행 명령 /// </summary> public DelegateCommand<object> ExecuteAnimationCompletedCommand { get; private set; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainPage() /// <summary> /// 생성자 /// </summary> public MainPage() { InitializeComponent(); ExecuteAnimationStartedCommand = new DelegateCommand<object> ( source => { this.startButton.IsEnabled = false; this.startButton.Content = "애니메이션 진행중"; } ); ExecuteAnimationCompletedCommand = new DelegateCommand<object> ( source => { this.startButton.IsEnabled = true; this.startButton.Content = "애니메이션 시작"; } ); } #endregion } |
