diff options
Diffstat (limited to 'MediaBrowser.UI/UserInput/KeyboardListener.cs')
| -rw-r--r-- | MediaBrowser.UI/UserInput/KeyboardListener.cs | 210 |
1 files changed, 0 insertions, 210 deletions
diff --git a/MediaBrowser.UI/UserInput/KeyboardListener.cs b/MediaBrowser.UI/UserInput/KeyboardListener.cs deleted file mode 100644 index 76ce8e15a..000000000 --- a/MediaBrowser.UI/UserInput/KeyboardListener.cs +++ /dev/null @@ -1,210 +0,0 @@ -using System; -using System.Diagnostics; -using System.Runtime.InteropServices; -using System.Windows.Forms; - -namespace MediaBrowser.UI.UserInput -{ - /// <summary> - /// Provides a basic low-level keyboard listener - /// Inspired by http://blogs.msdn.com/b/toub/archive/2006/05/03/589423.aspx - /// Use the KeyDown event to listen for keys. - /// Make sure to detach from the event when not needed. - /// </summary> - public static class KeyboardListener - { - #region KeyDown EventHandler - /// <summary> - /// The _ key down - /// </summary> - static volatile EventHandler<KeyEventArgs> _KeyDown; - /// <summary> - /// Fires whenever CurrentItem changes - /// </summary> - public static event EventHandler<KeyEventArgs> KeyDown - { - add - { - if (_KeyDown == null) - { - StartListening(); - } - - _KeyDown += value; - } - remove - { - _KeyDown -= value; - - if (_KeyDown == null && _hookID != IntPtr.Zero) - { - StopListening(); - } - } - } - - /// <summary> - /// Raises the <see cref="E:KeyDown" /> event. - /// </summary> - /// <param name="e">The <see cref="KeyEventArgs" /> instance containing the event data.</param> - private static void OnKeyDown(KeyEventArgs e) - { - e.SuppressKeyPress = false; - - if (_KeyDown != null) - { - // For now, don't async this - // This will give listeners a chance to modify SuppressKeyPress if they want - try - { - _KeyDown(null, e); - } - catch (Exception ex) - { - } - } - } - #endregion - - /// <summary> - /// The W h_ KEYBOAR d_ LL - /// </summary> - private const int WH_KEYBOARD_LL = 13; - /// <summary> - /// The W m_ KEYDOWN - /// </summary> - private const int WM_KEYDOWN = 0x0100; - /// <summary> - /// The W m_ SYSKEYDOWN - /// </summary> - private const int WM_SYSKEYDOWN = 0x0104; - - /// <summary> - /// The _hook ID - /// </summary> - private static IntPtr _hookID = IntPtr.Zero; - /// <summary> - /// The _proc - /// </summary> - private static LowLevelKeyboardProc _proc = HookCallback; - - /// <summary> - /// Starts the listening. - /// </summary> - private static void StartListening() - { - _hookID = SetHook(_proc); - } - - /// <summary> - /// Stops the listening. - /// </summary> - private static void StopListening() - { - UnhookWindowsHookEx(_hookID); - _hookID = IntPtr.Zero; - } - - /// <summary> - /// Sets the hook. - /// </summary> - /// <param name="proc">The proc.</param> - /// <returns>IntPtr.</returns> - private static IntPtr SetHook(LowLevelKeyboardProc proc) - { - using (var curProcess = Process.GetCurrentProcess()) - using (var curModule = curProcess.MainModule) - { - return SetWindowsHookEx(WH_KEYBOARD_LL, proc, - GetModuleHandle(curModule.ModuleName), 0); - } - } - - /// <summary> - /// Hooks the callback. - /// </summary> - /// <param name="nCode">The n code.</param> - /// <param name="wParam">The w param.</param> - /// <param name="lParam">The l param.</param> - /// <returns>IntPtr.</returns> - private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) - { - var suppressKeyPress = false; - - if (nCode >= 0) - { - if (wParam == (IntPtr)WM_KEYDOWN || wParam == (IntPtr)WM_SYSKEYDOWN) - { - var vkCode = Marshal.ReadInt32(lParam); - - var keyData = (Keys)vkCode; - - var e = new KeyEventArgs(keyData); - - OnKeyDown(e); - - suppressKeyPress = e.SuppressKeyPress; - } - } - - if (suppressKeyPress) - { - return IntPtr.Zero; - } - - return CallNextHookEx(_hookID, nCode, wParam, lParam); - } - - /// <summary> - /// Delegate LowLevelKeyboardProc - /// </summary> - /// <param name="nCode">The n code.</param> - /// <param name="wParam">The w param.</param> - /// <param name="lParam">The l param.</param> - /// <returns>IntPtr.</returns> - private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam); - - #region Imports - /// <summary> - /// Sets the windows hook ex. - /// </summary> - /// <param name="idHook">The id hook.</param> - /// <param name="lpfn">The LPFN.</param> - /// <param name="hMod">The h mod.</param> - /// <param name="dwThreadId">The dw thread id.</param> - /// <returns>IntPtr.</returns> - [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] - private static extern IntPtr SetWindowsHookEx(int idHook, - LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId); - - /// <summary> - /// Unhooks the windows hook ex. - /// </summary> - /// <param name="hhk">The HHK.</param> - /// <returns><c>true</c> if XXXX, <c>false</c> otherwise</returns> - [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] - [return: MarshalAs(UnmanagedType.Bool)] - private static extern bool UnhookWindowsHookEx(IntPtr hhk); - - /// <summary> - /// Calls the next hook ex. - /// </summary> - /// <param name="hhk">The HHK.</param> - /// <param name="nCode">The n code.</param> - /// <param name="wParam">The w param.</param> - /// <param name="lParam">The l param.</param> - /// <returns>IntPtr.</returns> - [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] - private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, - IntPtr wParam, IntPtr lParam); - - /// <summary> - /// Gets the module handle. - /// </summary> - /// <param name="lpModuleName">Name of the lp module.</param> - /// <returns>IntPtr.</returns> - [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)] - private static extern IntPtr GetModuleHandle(string lpModuleName); - #endregion - } -} |