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Added Global hotkey + bumped version
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,148 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Runtime.InteropServices; | ||
| using System.Windows.Input; | ||
|
|
||
| namespace HardTop | ||
| { | ||
| internal class GlobalHotKey : IDisposable | ||
| { | ||
| /// <summary> | ||
| /// Registers a global hotkey | ||
| /// </summary> | ||
| /// <param name="aKeyGestureString">e.g. Alt + Shift + Control + Win + S</param> | ||
| /// <param name="aAction">Action to be called when hotkey is pressed</param> | ||
| /// <returns>true, if registration succeeded, otherwise false</returns> | ||
| public static bool RegisterHotKey(string aKeyGestureString, Action aAction) | ||
| { | ||
| var c = new KeyGestureConverter(); | ||
| KeyGesture aKeyGesture = (KeyGesture)c.ConvertFrom(aKeyGestureString); | ||
| return RegisterHotKey(aKeyGesture.Modifiers, aKeyGesture.Key, aAction); | ||
| } | ||
|
|
||
| public static bool RegisterHotKey(ModifierKeys aModifier, Key aKey, Action aAction) | ||
| { | ||
| if (aModifier == ModifierKeys.None) | ||
| { | ||
| throw new ArgumentException("Modifier must not be ModifierKeys.None"); | ||
| } | ||
| if (aAction is null) | ||
| { | ||
| throw new ArgumentNullException(nameof(aAction)); | ||
| } | ||
|
|
||
| System.Windows.Forms.Keys aVirtualKeyCode = (System.Windows.Forms.Keys)KeyInterop.VirtualKeyFromKey(aKey); | ||
| currentID++; | ||
| bool aRegistered = RegisterHotKey(window.Handle, currentID, | ||
| (uint)aModifier | MOD_NOREPEAT, | ||
| (uint)aVirtualKeyCode); | ||
|
|
||
| if (aRegistered) | ||
| { | ||
| registeredHotKeys.Add(new HotKeyWithAction(aModifier, aKey, aAction)); | ||
| } | ||
| return aRegistered; | ||
| } | ||
|
|
||
| public void Dispose() | ||
| { | ||
| // unregister all the registered hot keys. | ||
| for (int i = currentID; i > 0; i--) UnregisterHotKey(window.Handle, i); | ||
|
|
||
| // dispose the inner native window. | ||
| window.Dispose(); | ||
| } | ||
|
|
||
| static GlobalHotKey() | ||
| { | ||
| window.KeyPressed += (s, e) => | ||
| { | ||
| registeredHotKeys.ForEach(x => | ||
| { | ||
| if (e.Modifier == x.Modifier && e.Key == x.Key) x.Action(); | ||
| }); | ||
| }; | ||
| } | ||
|
|
||
| private static readonly InvisibleWindowForMessages window = new InvisibleWindowForMessages(); | ||
| private static int currentID; | ||
| private static readonly uint MOD_NOREPEAT = 0x4000; | ||
| private static readonly List<HotKeyWithAction> registeredHotKeys = new List<HotKeyWithAction>(); | ||
|
|
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| private class HotKeyWithAction | ||
| { | ||
|
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| public HotKeyWithAction(ModifierKeys modifier, Key key, Action action) | ||
| { | ||
| Modifier = modifier; | ||
| Key = key; | ||
| Action = action; | ||
| } | ||
|
|
||
| public ModifierKeys Modifier { get; } | ||
| public Key Key { get; } | ||
| public Action Action { get; } | ||
| } | ||
|
|
||
| // Registers a hot key with Windows. | ||
| [DllImport("user32.dll")] | ||
| private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk); | ||
| // Unregisters the hot key with Windows. | ||
| [DllImport("user32.dll")] | ||
| private static extern bool UnregisterHotKey(IntPtr hWnd, int id); | ||
|
|
||
| private class InvisibleWindowForMessages : System.Windows.Forms.NativeWindow, IDisposable | ||
| { | ||
| public InvisibleWindowForMessages() | ||
| { | ||
| CreateHandle(new System.Windows.Forms.CreateParams()); | ||
| } | ||
|
|
||
| private static readonly int WM_HOTKEY = 0x0312; | ||
| protected override void WndProc(ref System.Windows.Forms.Message m) | ||
| { | ||
| base.WndProc(ref m); | ||
|
|
||
| if (m.Msg == WM_HOTKEY) | ||
| { | ||
| var aWPFKey = KeyInterop.KeyFromVirtualKey(((int)m.LParam >> 16) & 0xFFFF); | ||
| ModifierKeys modifier = (ModifierKeys)((int)m.LParam & 0xFFFF); | ||
| KeyPressed?.Invoke(this, new HotKeyPressedEventArgs(modifier, aWPFKey)); | ||
| } | ||
| } | ||
|
|
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| public class HotKeyPressedEventArgs : EventArgs | ||
| { | ||
| private readonly ModifierKeys _modifier; | ||
| private readonly Key _key; | ||
|
|
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| internal HotKeyPressedEventArgs(ModifierKeys modifier, Key key) | ||
| { | ||
| _modifier = modifier; | ||
| _key = key; | ||
| } | ||
|
|
||
| public ModifierKeys Modifier | ||
| { | ||
| get { return _modifier; } | ||
| } | ||
|
|
||
| public Key Key | ||
| { | ||
| get { return _key; } | ||
| } | ||
| } | ||
|
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| public event EventHandler<HotKeyPressedEventArgs> KeyPressed; | ||
|
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| #region IDisposable Members | ||
|
|
||
| public void Dispose() | ||
| { | ||
| this.DestroyHandle(); | ||
| } | ||
|
|
||
| #endregion | ||
| } | ||
| } | ||
| } |
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