Started implementing EventAggregator

src/Artemis.UI/Artemis.UI.csproj

@@ -152,6 +152,7 @@
     <Compile Include="Converters\InverseBooleanConverter.cs" />
     <Compile Include="Converters\NullToImageConverter.cs" />
     <Compile Include="Converters\NullToVisibilityConverter.cs" />
+    <Compile Include="Events\MainWindowFocusChangedEvent.cs" />
     <Compile Include="Utilities\BindableSelectedItemBehavior.cs" />
     <Compile Include="Utilities\TriggerTracing.cs" />
     <Compile Include="Exceptions\ArtemisCoreException.cs" />

src/Artemis.UI/Events/MainWindowFocusChangedEvent.cs

@@ -0,0 +1,14 @@
+using System;
+
+namespace Artemis.UI.Events
+{
+    public class MainWindowFocusChangedEvent : EventArgs
+    {
+        public MainWindowFocusChangedEvent(bool isFocused)
+        {
+            IsFocused = isFocused;
+        }
+
+        public bool IsFocused { get; }
+    }
+}

src/Artemis.UI/Screens/Module/ProfileEditor/Visualization/ProfileViewModel.cs

@@ -9,6 +9,7 @@ using Artemis.Core.Models.Surface;
 using Artemis.Core.Plugins.Models;
 using Artemis.Core.Services;
 using Artemis.Core.Services.Storage.Interfaces;
+using Artemis.UI.Events;
 using Artemis.UI.Extensions;
 using Artemis.UI.Screens.Shared;
 using Artemis.UI.Screens.SurfaceEditor;
@@ -19,12 +20,12 @@ using Point = System.Windows.Point;
 
 namespace Artemis.UI.Screens.Module.ProfileEditor.Visualization
 {
-    public class ProfileViewModel : ProfileEditorPanelViewModel
+    public class ProfileViewModel : ProfileEditorPanelViewModel, IHandle<MainWindowFocusChangedEvent>
     {
         private readonly ISettingsService _settingsService;
         private readonly TimerUpdateTrigger _updateTrigger;
 
-        public ProfileViewModel(ISurfaceService surfaceService, ISettingsService settingsService)
+        public ProfileViewModel(ISurfaceService surfaceService, ISettingsService settingsService, IEventAggregator eventAggregator)
         {
             _settingsService = settingsService;
             Devices = new ObservableCollection<ProfileDeviceViewModel>();
@@ -248,5 +249,10 @@ namespace Artemis.UI.Screens.Module.ProfileEditor.Visualization
         }
 
         #endregion
+
+        public void Handle(MainWindowFocusChangedEvent message)
+        {
+            Console.WriteLine(message);
+        }
     }
 }

src/Artemis.UI/Screens/RootView.xaml

@@ -9,15 +9,17 @@
                    xmlns:abstract="clr-namespace:Artemis.Core.Plugins.Abstract;assembly=Artemis.Core"
                    xmlns:screens="clr-namespace:Artemis.UI.Screens"
                    mc:Ignorable="d"
+                   Icon="/Artemis.UI;component/Resources/logo-512.png"
+                   Title="Artemis"
                    GlowBrush="{DynamicResource AccentColorBrush}"
                    FontFamily="{StaticResource DefaultFont}"
-                   Title="Artemis"
+                   SaveWindowPosition="True"
+                   UseLayoutRounding="True"
+                   Deactivated="{s:Action WindowDeactivated}"
+                   Activated="{s:Action WindowActivated}"
                    d:DesignHeight="640"
                    d:DesignWidth="1200"
-                   d:DataContext="{d:DesignInstance screens:RootViewModel}"
+                   d:DataContext="{d:DesignInstance screens:RootViewModel}">
-                   SaveWindowPosition="True"
-                   Icon="/Artemis.UI;component/Resources/logo-512.png"
-                   UseLayoutRounding="True">
     <metro:MetroWindow.Resources>
         <Style TargetType="ContentControl" x:Key="InitializingFade">
             <Style.Triggers>

src/Artemis.UI/Screens/RootViewModel.cs

@@ -4,9 +4,11 @@ using System.ComponentModel;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
+using System.Windows;
 using System.Windows.Controls;
 using Artemis.Core.Events;
 using Artemis.Core.Services.Interfaces;
+using Artemis.UI.Events;
 using Artemis.UI.Ninject.Factories;
 using Artemis.UI.Screens.Home;
 using Artemis.UI.Screens.News;
@@ -22,13 +24,19 @@ namespace Artemis.UI.Screens
     {
         private readonly ICollection<IScreenViewModel> _artemisViewModels;
         private readonly IModuleViewModelFactory _moduleViewModelFactory;
+        private readonly IEventAggregator _eventAggregator;
         private readonly IPluginService _pluginService;
+        private bool _lostFocus;
 
-        public RootViewModel(ICollection<IScreenViewModel> artemisViewModels, IPluginService pluginService, IModuleViewModelFactory moduleViewModelFactory)
+        public RootViewModel(ICollection<IScreenViewModel> artemisViewModels,
+            IPluginService pluginService,
+            IModuleViewModelFactory moduleViewModelFactory,
+            IEventAggregator eventAggregator)
         {
             _artemisViewModels = artemisViewModels;
             _pluginService = pluginService;
             _moduleViewModelFactory = moduleViewModelFactory;
+            _eventAggregator = eventAggregator;
 
             // Activate the home item
             ActiveItem = _artemisViewModels.First(v => v.GetType() == typeof(HomeViewModel));
@@ -127,5 +135,24 @@ namespace Artemis.UI.Screens
 
             ActiveItemReady = true;
         }
+
+        public void WindowDeactivated()
+        {
+            var windowState = ((Window) View).WindowState;
+            if (windowState == WindowState.Minimized)
+                return;
+
+            _lostFocus = true;
+            _eventAggregator.Publish(new MainWindowFocusChangedEvent(false));
+        }
+
+        public void WindowActivated()
+        {
+            if (!_lostFocus)
+                return;
+
+            _lostFocus = false;
+            _eventAggregator.Publish(new MainWindowFocusChangedEvent(true));
+        }
     }
 }