From ec7cb9c6facd4a66e7ae1601cf51f0b341b0392b Mon Sep 17 00:00:00 2001
From: Scott Lovegrove <scottisafool@live.co.uk>
Date: Sat, 29 Aug 2015 17:27:17 +0100
Subject: [PATCH] Updated to use ITriggerValue

---
 .../HostedStateTrigger.cs                     | 42 ++++++++++++++++---
 src/WindowsStateTriggers/ITriggerValue.cs     |  4 --
 2 files changed, 36 insertions(+), 10 deletions(-)

diff --git a/src/WindowsStateTriggers/HostedStateTrigger.cs b/src/WindowsStateTriggers/HostedStateTrigger.cs
index 41b5cde..3168414 100644
--- a/src/WindowsStateTriggers/HostedStateTrigger.cs
+++ b/src/WindowsStateTriggers/HostedStateTrigger.cs
@@ -1,4 +1,5 @@
-using Windows.ApplicationModel.Core;
+using System;
+using Windows.ApplicationModel.Core;
 using Windows.UI.Xaml;
 
 namespace WindowsStateTriggers
@@ -6,20 +7,20 @@ namespace WindowsStateTriggers
     /// <summary>
     /// A state trigger for determining if the app is in a hosted state (for example, if share is being used)
     /// </summary>
-    public class HostedStateTrigger : StateTriggerBase
+    public class HostedStateTrigger : StateTriggerBase, ITriggerValue
     {
         /// <summary>
         /// Identifies the <see cref="IsHosted" /> dependency property.
         /// </summary>
         public static readonly DependencyProperty IsHostedProperty = DependencyProperty.Register(
-            "IsHosted", typeof (HostedState), typeof (HostedStateTrigger), new PropertyMetadata(HostedState.Unknown, OnIsHostedRequiredChanged));
+            "IsHosted", typeof(HostedState), typeof(HostedStateTrigger), new PropertyMetadata(HostedState.Unknown, OnIsHostedRequiredChanged));
 
         /// <summary>
         /// Gets or sets the is hosted value.
         /// </summary>
         public HostedState IsHosted
         {
-            get { return (HostedState) GetValue(IsHostedProperty); }
+            get { return (HostedState)GetValue(IsHostedProperty); }
             set { SetValue(IsHostedProperty, value); }
         }
 
@@ -41,11 +42,11 @@ private void UpdateStateTrigger()
             var isHosted = CoreApplication.GetCurrentView().IsHosted;
             if (isHosted)
             {
-                SetActive(IsHosted == HostedState.Hosted);
+                IsActive = IsHosted == HostedState.Hosted;
             }
             else
             {
-                SetActive(IsHosted == HostedState.NotHosted);
+                IsActive = IsHosted == HostedState.NotHosted;
             }
         }
 
@@ -69,5 +70,34 @@ public enum HostedState
             /// </summary>
             NotHosted
         }
+
+        #region ITriggerValue
+
+        private bool m_IsActive;
+
+        /// <summary>
+        /// Gets a value indicating whether this trigger is active.
+        /// </summary>
+        /// <value><c>true</c> if this trigger is active; otherwise, <c>false</c>.</value>
+        public bool IsActive
+        {
+            get { return m_IsActive; }
+            private set
+            {
+                if (m_IsActive != value)
+                {
+                    m_IsActive = value;
+                    base.SetActive(value);
+                    IsActiveChanged?.Invoke(this, EventArgs.Empty);
+                }
+            }
+        }
+
+        /// <summary>
+        /// Occurs when the <see cref="IsActive" /> property has changed.
+        /// </summary>
+        public event EventHandler IsActiveChanged;
+
+        #endregion ITriggerValue
     }
 }
diff --git a/src/WindowsStateTriggers/ITriggerValue.cs b/src/WindowsStateTriggers/ITriggerValue.cs
index c3e48a6..900f8f8 100644
--- a/src/WindowsStateTriggers/ITriggerValue.cs
+++ b/src/WindowsStateTriggers/ITriggerValue.cs
@@ -1,8 +1,4 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace WindowsStateTriggers
 {