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Util/GlobalHotKey.cs

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+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Interop;
+
+namespace GeekDesk.Util
+{
+    public class GlobalHotKey
+    {
+        public enum HotkeyModifiers
+        {
+            MOD_ALT = 0x1,
+            MOD_CONTROL = 0x2,
+            MOD_SHIFT = 0x4,
+            MOD_WIN = 0x8
+        }
+
+        private static int currentID;
+        const int WM_HOTKEY = 0x312;
+        private static Dictionary<int, Window> handleTemp = new Dictionary<int, Window>();
+        public static Dictionary<int, HotKeyCallBackHanlder> callbackTemp = new Dictionary<int, HotKeyCallBackHanlder>();
+
+        public delegate void HotKeyCallBackHanlder();
+        /// <summary>
+        /// Registers a global hotkey
+        /// </summary>
+        /// <param name="aKeyGestureString">e.g. Alt + Shift + Control + Win + S</param>
+        /// <param name="callback">Action to be called when hotkey is pressed</param>
+        /// <returns>true, if registration succeeded, otherwise false</returns>
+        public static int RegisterHotKey(string aKeyGestureString, HotKeyCallBackHanlder callback)
+        {
+            var c = new KeyGestureConverter();
+            KeyGesture aKeyGesture = (KeyGesture)c.ConvertFrom(aKeyGestureString);
+            return RegisterHotKey((HotkeyModifiers)aKeyGesture.Modifiers, aKeyGesture.Key, callback);
+        }
+
+        public static int RegisterHotKey(HotkeyModifiers aModifier, Key key, HotKeyCallBackHanlder callback)
+        {
+            Window window = new Window
+            {
+                WindowStyle = WindowStyle.None,
+                Height = 0,
+                Width = 0,
+                Visibility = Visibility.Collapsed,
+                ShowInTaskbar = false
+            };
+            window.Show();
+            IntPtr handle = new WindowInteropHelper(window).Handle;
+            HwndSource hs = HwndSource.FromHwnd(handle);
+            hs.AddHook(WndProc);
+            currentID += 1;
+            if (!RegisterHotKey(handle, currentID, aModifier, (uint)KeyInterop.VirtualKeyFromKey(key)))
+            {
+                window.Close();
+                throw new Exception("RegisterHotKey Failed");
+            }
+            handleTemp.Add(currentID, window);
+            callbackTemp.Add(currentID, callback);
+            return currentID;
+        }
+        /// <summary>
+        /// 快捷键消息处理
+        /// </summary>
+        static IntPtr WndProc(IntPtr windowHandle, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
+        {
+            if (msg == WM_HOTKEY)
+            {
+                int id = wParam.ToInt32();
+                if (callbackTemp.TryGetValue(id, out var callback))
+                {
+                    callback();
+                }
+            }
+            return IntPtr.Zero;
+        }
+
+        public static void Dispose(int id)
+        {
+            bool test = UnregisterHotKey(new WindowInteropHelper(handleTemp[id]).Handle, id);
+            GlobalHotKey.handleTemp[id].Close();
+            GlobalHotKey.handleTemp.Remove(id);
+            GlobalHotKey.callbackTemp.Remove(id);
+            Console.WriteLine(test);
+        }
+
+        // Registers a hot key with Windows.
+        [DllImport("user32.dll")]
+        private static extern bool RegisterHotKey(IntPtr hWnd, int id, HotkeyModifiers fsModifiers, uint vk);
+        // Unregisters the hot key with Windows.
+        [DllImport("user32.dll")]
+        private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
+    }
+}