Created
July 11, 2015 18:48
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Global Hotkey: HotKey _hotKey = new HotKey(Key.Space, KeyModifier.Alt, OnHotKeyHandler); private void OnHotKeyHandler(HotKey hotKey) { //do shit }
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using System; | |
using System.Collections.Generic; | |
using System.Diagnostics; | |
using System.Runtime.InteropServices; | |
using System.Windows.Input; | |
using System.Windows.Interop; | |
namespace fuzzy_kellotin | |
{ | |
public class HotKey : IDisposable | |
{ | |
private static Dictionary<int, HotKey> _dictHotKeyToCalBackProc; | |
[DllImport("user32.dll")] | |
private static extern bool RegisterHotKey(IntPtr hWnd, int id, UInt32 fsModifiers, UInt32 vlc); | |
[DllImport("user32.dll")] | |
private static extern bool UnregisterHotKey(IntPtr hWnd, int id); | |
public const int WmHotKey = 0x0312; | |
private bool _disposed = false; | |
public Key Key { get; private set; } | |
public KeyModifier KeyModifiers { get; private set; } | |
public Action<HotKey> Action { get; private set; } | |
public int Id { get; set; } | |
// ****************************************************************** | |
public HotKey(Key k, KeyModifier keyModifiers, Action<HotKey> action, bool register = true) | |
{ | |
Key = k; | |
KeyModifiers = keyModifiers; | |
Action = action; | |
if (register) | |
{ | |
Register(); | |
} | |
} | |
// ****************************************************************** | |
public bool Register() | |
{ | |
int virtualKeyCode = KeyInterop.VirtualKeyFromKey(Key); | |
Id = virtualKeyCode + ((int)KeyModifiers * 0x10000); | |
bool result = RegisterHotKey(IntPtr.Zero, Id, (UInt32)KeyModifiers, (UInt32)virtualKeyCode); | |
if (_dictHotKeyToCalBackProc == null) | |
{ | |
_dictHotKeyToCalBackProc = new Dictionary<int, HotKey>(); | |
ComponentDispatcher.ThreadFilterMessage += new ThreadMessageEventHandler(ComponentDispatcherThreadFilterMessage); | |
} | |
_dictHotKeyToCalBackProc.Add(Id, this); | |
Debug.Print(result.ToString() + ", " + Id + ", " + virtualKeyCode); | |
return result; | |
} | |
// ****************************************************************** | |
public void Unregister() | |
{ | |
HotKey hotKey; | |
if (_dictHotKeyToCalBackProc.TryGetValue(Id, out hotKey)) | |
{ | |
UnregisterHotKey(IntPtr.Zero, Id); | |
} | |
} | |
// ****************************************************************** | |
private static void ComponentDispatcherThreadFilterMessage(ref MSG msg, ref bool handled) | |
{ | |
if (!handled) | |
{ | |
if (msg.message == WmHotKey) | |
{ | |
HotKey hotKey; | |
if (_dictHotKeyToCalBackProc.TryGetValue((int)msg.wParam, out hotKey)) | |
{ | |
if (hotKey.Action != null) | |
{ | |
hotKey.Action.Invoke(hotKey); | |
} | |
handled = true; | |
} | |
} | |
} | |
} | |
// ****************************************************************** | |
// Implement IDisposable. | |
// Do not make this method virtual. | |
// A derived class should not be able to override this method. | |
public void Dispose() | |
{ | |
Dispose(true); | |
// This object will be cleaned up by the Dispose method. | |
// Therefore, you should call GC.SupressFinalize to | |
// take this object off the finalization queue | |
// and prevent finalization code for this object | |
// from executing a second time. | |
GC.SuppressFinalize(this); | |
} | |
// ****************************************************************** | |
// Dispose(bool disposing) executes in two distinct scenarios. | |
// If disposing equals true, the method has been called directly | |
// or indirectly by a user's code. Managed and unmanaged resources | |
// can be _disposed. | |
// If disposing equals false, the method has been called by the | |
// runtime from inside the finalizer and you should not reference | |
// other objects. Only unmanaged resources can be _disposed. | |
protected virtual void Dispose(bool disposing) | |
{ | |
// Check to see if Dispose has already been called. | |
if (!this._disposed) | |
{ | |
// If disposing equals true, dispose all managed | |
// and unmanaged resources. | |
if (disposing) | |
{ | |
// Dispose managed resources. | |
Unregister(); | |
} | |
// Note disposing has been done. | |
_disposed = true; | |
} | |
} | |
} | |
// ****************************************************************** | |
[Flags] | |
public enum KeyModifier | |
{ | |
None = 0x0000, | |
Alt = 0x0001, | |
Ctrl = 0x0002, | |
NoRepeat = 0x4000, | |
Shift = 0x0004, | |
Win = 0x0008 | |
} | |
// ****************************************************************** | |
} |
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