Make all of the NSView derivatives signal activation

Author: anaisbetts

ReactiveUI.Platforms/Cocoa/ReactiveCollectionViewCell.cs

@@ -6,6 +6,7 @@
 using System.Reflection;
 using System.Reactive.Subjects;
 using System.Reactive.Concurrency;
+using System.Reactive;
 using System.Linq;
 using System.Threading;
 using System.Reactive.Disposables;
@@ -15,10 +16,11 @@
 using MonoTouch.Foundation;
 using MonoTouch.UIKit;
 using Splat;
+using ReactiveUI;
 
 namespace ReactiveUI.Cocoa
 {
-    public abstract class ReactiveCollectionViewCell : UICollectionViewCell, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension
+    public abstract class ReactiveCollectionViewCell : UICollectionViewCell, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension, ICanActivate
     {
         public ReactiveCollectionViewCell(IntPtr handle) : base (handle) { setupRxObj(); }
         public ReactiveCollectionViewCell(NSObjectFlag t) : base (t) { setupRxObj(); }
@@ -78,5 +80,16 @@ public IDisposable SuppressChangeNotifications()
         {
             return this.suppressChangeNotifications();
         }
+
+        Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+        Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+        public override void WillMoveToSuperview(UIView newsuper)
+        {
+            base.WillMoveToSuperview(newsuper);
+            RxApp.MainThreadScheduler.Schedule(() => (newsuper != null ? activated : deactivated).OnNext(Unit.Default));
+        }
     }
 }

ReactiveUI.Platforms/Cocoa/ReactiveImageView.cs

@@ -13,6 +13,7 @@
 using System.Collections.Generic;
 using System.Drawing;
 using Splat;
+using System.Reactive;
 
 #if UIKIT
 using MonoTouch.Foundation;
@@ -26,7 +27,7 @@
 
 namespace ReactiveUI.Cocoa
 {
-    public abstract class ReactiveImageView : NSImageView, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension
+    public abstract class ReactiveImageView : NSImageView, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension, ICanActivate
     {
         public ReactiveImageView(RectangleF frame) : base(frame) { this.setupReactiveExtension(); }
         public ReactiveImageView(IntPtr handle) : base(handle) { this.setupReactiveExtension(); }
@@ -78,6 +79,21 @@ public IDisposable SuppressChangeNotifications() {
         }
 
         public IObservable<Exception> ThrownExceptions { get { return this.getThrownExceptionsObservable(); } }
+        
+        Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+        Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+#if UIKIT
+        public override void WillMoveToSuperview(NSView newsuper)
+#else 
+        public override void ViewWillMoveToSuperview(NSView newsuper)
+#endif
+        {
+            base.WillMoveToSuperview(newsuper);
+            RxApp.MainThreadScheduler.Schedule(() => (newsuper != null ? activated : deactivated).OnNext(Unit.Default));
+        }
     }
 }
 

ReactiveUI.Platforms/Cocoa/ReactiveNSView.cs

@@ -12,6 +12,7 @@
 using System.Runtime.CompilerServices;
 using System.Collections.Generic;
 using Splat;
+using System.Reactive;
 
 #if UIKIT
 using MonoTouch.UIKit;
@@ -28,7 +29,7 @@ namespace ReactiveUI.Cocoa
     /// This is an View that is both an NSView and has ReactiveObject powers 
     /// (i.e. you can call RaiseAndSetIfChanged)
     /// </summary>
-    public class ReactiveView : NSView, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension
+    public class ReactiveView : NSView, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension, ICanActivate
     {
         protected ReactiveView() : base()
         {
@@ -103,5 +104,20 @@ public IDisposable SuppressChangeNotifications()
         }
 
         public IObservable<Exception> ThrownExceptions { get { return this.getThrownExceptionsObservable(); } }
+        
+        Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+        Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+#if UIKIT
+        public override void WillMoveToSuperview(NSView newsuper)
+#else
+        public override void ViewWillMoveToSuperview(NSView newsuper)
+#endif
+        {
+            base.WillMoveToSuperview(newsuper);
+            RxApp.MainThreadScheduler.Schedule(() => (newsuper != null ? activated : deactivated).OnNext(Unit.Default));
+        }
     }
 }

ReactiveUI.Platforms/Cocoa/ReactiveTableViewCell.cs

@@ -15,10 +15,11 @@
 using MonoTouch.Foundation;
 using MonoTouch.UIKit;
 using Splat;
+using System.Reactive;
 
 namespace ReactiveUI.Cocoa
 {
-    public abstract class ReactiveTableViewCell : UITableViewCell, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension
+    public abstract class ReactiveTableViewCell : UITableViewCell, IReactiveNotifyPropertyChanged, IHandleObservableErrors, IReactiveObjectExtension, ICanActivate
     {
         public ReactiveTableViewCell(IntPtr handle) : base (handle) { setupRxObj(); }
         public ReactiveTableViewCell(NSObjectFlag t) : base (t) { setupRxObj(); }
@@ -81,5 +82,16 @@ public IDisposable SuppressChangeNotifications()
         {
             return this.suppressChangeNotifications();
         }
+                
+        Subject<Unit> activated = new Subject<Unit>();
+        public IObservable<Unit> Activated { get { return activated; } }
+        Subject<Unit> deactivated = new Subject<Unit>();
+        public IObservable<Unit> Deactivated { get { return deactivated; } }
+
+        public override void WillMoveToSuperview(UIView newsuper)
+        {
+            base.WillMoveToSuperview(newsuper);
+            RxApp.MainThreadScheduler.Schedule(() => (newsuper != null ? activated : deactivated).OnNext(Unit.Default));
+        }
     }
 }