Enhancement: Added hotkeys, removed refresh button, made list fully a…

…uto-update

App.xaml.cs

@@ -1,10 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Configuration;
-using System.Data;
-using System.Linq;
-using System.Threading.Tasks;
-using System.Windows;
+using System.Windows;
 
 namespace WindowsAudioVolumeManager {
 	/// <summary>

AudioSessionElement.cs

@@ -55,7 +55,7 @@ public bool Saved {
 							MainWindow.SavedSessions.Remove(SavedSession);
 						}
 
-						if(MainWindow.Parser != null) {
+						if (MainWindow.Parser != null) {
 							MainWindow.Parser.Dirty = true;
 						}
 					});

ConfigParser.cs

@@ -28,7 +28,7 @@ public void LoadConfig() {
 		}
 
 		public void SaveConfig() {
-			if(SavedConfigObject == null) {
+			if (SavedConfigObject == null) {
 				SavedConfigObject = new ConfigObject();
 				SavedConfigObject.DefaultVolumeScalar = Window.DefaultSessionElement.ScalarVolume;
 				SavedConfigObject.SavedSessions = Window.SavedSessions;

HotkeyRegistrar.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Windows.Interop;
+
+namespace WindowsAudioVolumeManager {
+	public class HotkeyRegistrar {
+		[DllImport("user32.dll")]
+		private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
+		[DllImport("user32.dll")]
+		private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
+
+		public event EventHandler OnHotkeyPressed;
+		private IntPtr Handle;
+		private int HotKeyId;
+		private HwndSource hwndSource;
+
+		public HotkeyRegistrar(IntPtr handle, int hotKeyId) {
+			Handle = handle;
+			HotKeyId = hotKeyId;
+			hwndSource = HwndSource.FromHwnd(Handle);
+		}
+
+		public void RegisterHotkey(uint modifier, uint vk) {
+			RegisterHotKey(Handle, HotKeyId, modifier, vk);
+			hwndSource.AddHook(HwndHook);
+		}
+
+		public void UnregisterHotkey() {
+			UnregisterHotKey(Handle, HotKeyId);
+			hwndSource.RemoveHook(HwndHook);
+		}
+
+		private IntPtr HwndHook(IntPtr hwnd, int message, IntPtr wParam, IntPtr lParam, ref bool handled) {
+			if (message == 0x312 && wParam.ToInt32() == HotKeyId) { // WM_HOTKEY
+				OnHotkeyPressed?.Invoke(this, null);
+				handled = true;
+			}
+
+			return IntPtr.Zero;
+		}
+
+
+		public enum HotkeyModifier : uint {
+			MOD_ALT = 0x1,
+			MOD_CONTROL = 0x2,
+			MOD_NOREPEAT = 0x4000,
+			MOD_SHIFT = 0x4,
+			MOD_WIN = 0x8
+		}
+	}
+}

MainWindow.xaml

@@ -5,9 +5,10 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:WindowsAudioVolumeManager"
         mc:Ignorable="d"
-        Title="Ceiridge's Windows Audio Volume Manager" Height="460" Width="800" WindowStartupLocation="CenterScreen" ResizeMode="CanMinimize">
+        Title="Ceiridge's Windows Audio Volume Manager" Height="460" Width="800" WindowStartupLocation="CenterScreen" ResizeMode="CanMinimize" StateChanged="Window_StateChanged">
 	<Grid>
-		<ComboBox x:Name="AudioOutputCombo" HorizontalAlignment="Left" Height="37" Margin="10,10,0,0" VerticalAlignment="Top" Width="600" FontSize="22"/>
+		<Button x:Name="RefreshAppsButton" Content="Refresh Apps" HorizontalAlignment="Right" Height="37" Margin="0,10,10,0" VerticalAlignment="Top" FontSize="22" Click="RefreshAppsButton_Click" IsEnabled="False"/>
+		<ComboBox x:Name="AudioOutputCombo" HorizontalAlignment="Center" Height="37" Margin="0,10,0,0" VerticalAlignment="Top" Width="780" FontSize="22"/>
 		<ListView x:Name="SessionListView" ItemsSource="{Binding}" HorizontalAlignment="Center" Height="324" Margin="0,100,0,0" VerticalAlignment="Top" Width="780">
 			<ListView.ItemTemplate>
 				<DataTemplate>
@@ -26,10 +27,10 @@
 				</DataTemplate>
 			</ListView.ItemTemplate>
 		</ListView>
-		<Button x:Name="RefreshAppsButton" Content="Refresh Apps" HorizontalAlignment="Right" Height="37" Margin="0,10,10,0" VerticalAlignment="Top" FontSize="22" Click="RefreshAppsButton_Click"/>
 		<Slider x:Name="MasterSlider" HorizontalAlignment="Left" Height="23" Margin="10,70,0,0" VerticalAlignment="Top" Width="372" Maximum="100" SmallChange="1" AutoToolTipPlacement="TopLeft" ValueChanged="MasterSlider_ValueChanged"/>
 		<Slider x:Name="DefaultSessionSlider" HorizontalAlignment="Left" Height="23" Margin="387,70,0,0" VerticalAlignment="Top" Width="389" Maximum="100" SmallChange="1" AutoToolTipPlacement="TopLeft" Value="{Binding Volume, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
 		<TextBlock HorizontalAlignment="Left" Margin="10,52,0,0" Text="Master Volume" TextWrapping="Wrap" VerticalAlignment="Top"/>
 		<TextBlock HorizontalAlignment="Left" Margin="387,52,0,0" Text="Default Application Volume" TextWrapping="Wrap" VerticalAlignment="Top"/>
+		<TextBlock HorizontalAlignment="Left" Margin="10,424,0,0" Text="Hotkey to show this window: CTRL+SHIFT+V" TextWrapping="Wrap" VerticalAlignment="Top"/>
 	</Grid>
 </Window>

MainWindow.xaml.cs

@@ -6,14 +6,16 @@
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Interop;
 using System.Windows.Threading;
 
 namespace WindowsAudioVolumeManager {
 	public partial class MainWindow : Window {
 		public const string DEFAULT_APP_NAME = "_Default_App";
 
 		private readonly List<MMDevice> Devices = new List<MMDevice>();
-		private readonly ObservableCollection<AudioSessionElement> SessionControls = new ObservableCollection<AudioSessionElement>();
+		private readonly ObservableCollection<AudioSessionElement> SessionElements = new ObservableCollection<AudioSessionElement>();
+		private HotkeyRegistrar HotkeyRegistrar;
 
 		public readonly ConfigParser Parser;
 		public List<SavedAudioSession> SavedSessions = new List<SavedAudioSession>();
@@ -22,7 +24,7 @@ public partial class MainWindow : Window {
 
 		public MainWindow() {
 			InitializeComponent();
-			SessionListView.DataContext = SessionControls;
+			SessionListView.DataContext = SessionElements;
 			DefaultSessionElement = new AudioSessionElement(DEFAULT_APP_NAME, 1f, this);
 			DefaultSessionSlider.DataContext = DefaultSessionElement;
 
@@ -59,6 +61,15 @@ public MainWindow() {
 
 				Task.Run(VolumeManagerThread);
 			});
+
+			Task.Run(() => {
+				Thread.Sleep(5000); // Delay the hotkey registration to make sure the window exists
+				Invoke(() => {
+					HotkeyRegistrar = new HotkeyRegistrar(new WindowInteropHelper(this).Handle, unchecked((int)0xCE161D6E));
+					HotkeyRegistrar.OnHotkeyPressed += OnHotkeyPressed;
+					HotkeyRegistrar.RegisterHotkey((uint)HotkeyRegistrar.HotkeyModifier.MOD_CONTROL | (uint)HotkeyRegistrar.HotkeyModifier.MOD_SHIFT, 0x56); // VK_V
+				});
+			});
 		}
 
 		/// Has to run in an MTA thread
@@ -69,17 +80,17 @@ private void RefreshUIData() {
 			using AudioSessionManager2 sessionManager = AudioSessionManager2.FromMMDevice(device);
 			using AudioSessionEnumerator sessionEnumerator = sessionManager.GetSessionEnumerator();
 
-			Invoke(SessionControls.Clear);
+			Invoke(SessionElements.Clear);
 			foreach (AudioSessionControl session in sessionEnumerator) {
 				using SimpleAudioVolume volume = session.QueryInterface<SimpleAudioVolume>();
 				string name = GetSessionName(session);
 				SavedAudioSession savedSession = Invoke(() => SavedSessions.FirstOrDefault((ss) => ss.Name.Equals(name)));
 
-				if(savedSession == null) {
+				if (savedSession == null) {
 					volume.MasterVolume = DefaultSessionElement.ScalarVolume;
 				}
 
-				Invoke(() => SessionControls.Add(new AudioSessionElement(name, volume.MasterVolume, this, session, savedSession)));
+				Invoke(() => AddSessionElement(name, volume.MasterVolume, session, savedSession));
 			}
 
 			Invoke(() => {
@@ -106,13 +117,13 @@ private void VolumeManagerThread() {
 					foreach (AudioSessionControl session in sessionEnumerator) {
 						using SimpleAudioVolume volume = session.QueryInterface<SimpleAudioVolume>();
 						string name = GetSessionName(session);
-						AudioSessionElement element = Invoke(() => SessionControls.FirstOrDefault((element) => element.Name.Equals(name)));
+						AudioSessionElement element = Invoke(() => SessionElements.FirstOrDefault((element) => element.Name.Equals(name)));
 
 						if (element == null) {
 							SavedAudioSession savedSession = Invoke(() => SavedSessions.FirstOrDefault((ss) => ss.Name.Equals(name)));
 							volume.MasterVolume = savedSession != null ? savedSession.ScalarVolume : DefaultSessionElement.ScalarVolume;
 
-							Invoke(() => SessionControls.Add(new AudioSessionElement(name, volume.MasterVolume, this, session, savedSession)));
+							Invoke(() => AddSessionElement(name, volume.MasterVolume, session, savedSession));
 						} else {
 							float masterVol = volume.MasterVolume;
 
@@ -122,6 +133,13 @@ private void VolumeManagerThread() {
 							}
 						}
 					}
+
+					for (int i = SessionElements.Count - 1; i >= 0; i--) { // Reverse iteration to allow removal
+						AudioSessionElement element = SessionElements[i];
+						if (!sessionEnumerator.Any((session) => element.Name.Equals(GetSessionName(session)))) {
+							Invoke(() => SessionElements.RemoveAt(i));
+						}
+					}
 				} catch (Exception e) {
 					Console.WriteLine(e);
 				}
@@ -148,6 +166,13 @@ private string GetSessionName(AudioSessionControl sessionControl) {
 
 			return name.Equals(@"@%SystemRoot%\System32\AudioSrv.Dll,-202") ? "_System Sounds" : name;
 		}
+		private void AddSessionElement(string name, float scalarVolume, AudioSessionControl session, SavedAudioSession savedSession) {
+			if (!SessionElements.Any((element) => element.Name.Equals(name))) {
+				SessionElements.Add(new AudioSessionElement(name, scalarVolume, this, session, savedSession));
+			}
+		}
+
+
 
 		private void RefreshAppsButton_Click(object sender, RoutedEventArgs e) {
 			Task.Run(RefreshUIData);
@@ -158,9 +183,21 @@ private void MasterSlider_ValueChanged(object sender, RoutedPropertyChangedEvent
 			using AudioEndpointVolume masterVolume = AudioEndpointVolume.FromDevice(device);
 			masterVolume.MasterVolumeLevelScalar = (float)(MasterSlider.Value / 100f);
 
-			foreach (AudioSessionElement element in SessionControls) {
+			foreach (AudioSessionElement element in SessionElements) {
 				element.NotifyVolumeUpdate();
 			}
 		}
+
+		private void Window_StateChanged(object sender, EventArgs e) {
+			if (WindowState == WindowState.Minimized) {
+				Hide();
+			}
+		}
+
+		private void OnHotkeyPressed(object sender, EventArgs e) {
+			Show();
+			Focus();
+			WindowState = WindowState.Normal;
+		}
 	}
 }

SavedAudioSession.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace WindowsAudioVolumeManager {
+namespace WindowsAudioVolumeManager {
 	public class SavedAudioSession {
 		public string Name { set; get; }
 		public float ScalarVolume { set; get; }