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b4f81a0c2a
Import the codebase for Window Walker - Not loaded into the module list - Not added it to the installer list.
76 lines
2.7 KiB
C#
76 lines
2.7 KiB
C#
// Copyright (c) Microsoft Corporation
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// The Microsoft Corporation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information. Code forked from Betsegaw Tadele's https://github.com/betsegaw/windowwalker/
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using System;
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using System.Windows;
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using System.Windows.Forms;
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using System.Windows.Interop;
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using System.Windows.Media;
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namespace WindowWalker
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{
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/// <summary>
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/// This class handles all hotkey related activities
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/// </summary>
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/// <remarks>Large pieces of this class were retrived from
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/// http://www.dreamincode.net/forums/topic/323708-global-hotkeys-for-wpf-applications-c%23/
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/// </remarks>
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internal class HotKeyHandler
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{
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private readonly IntPtr hwnd;
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/// <summary>
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/// Delegate handler for Hotkey being called
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/// </summary>
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public delegate void HotKeyPressedHandler(object sender, EventArgs e);
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/// <summary>
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/// Event raised when there is an update to the list of open windows
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/// </summary>
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public event HotKeyPressedHandler OnHotKeyPressed;
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/// <summary>
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/// Initializes a new instance of the <see cref="HotKeyHandler"/> class.
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/// Constructor for the class
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/// </summary>
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/// <param name="hwnd">The handle to the window we are registering the key for</param>
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public HotKeyHandler(Visual window)
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{
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hwnd = new WindowInteropHelper((Window)window).Handle;
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if (!(PresentationSource.FromVisual(window) is HwndSource source))
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{
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throw new Exception("Could not create hWnd source from window.");
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}
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source.AddHook(WndProc);
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bool result = Components.InteropAndHelpers.RegisterHotKey(
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hwnd,
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1,
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(int)Components.InteropAndHelpers.Modifiers.Ctrl | (int)Components.InteropAndHelpers.Modifiers.Win,
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(int)Keys.None);
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}
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/// <summary>
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/// Call back function to detect when the hot key has been called
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/// </summary>
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/// <param name="hwnd"></param>
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/// <param name="msg"></param>
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/// <param name="wParam"></param>
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/// <param name="lParam"></param>
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/// <param name="handled">if a key was called</param>
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/// <returns>if a key was called</returns>
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private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
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{
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if (msg == 0x0312 && OnHotKeyPressed != null)
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{
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OnHotKeyPressed(this, new EventArgs());
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}
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return IntPtr.Zero;
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}
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}
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}
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