100 lines
2.2 KiB
C#
100 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Runtime.InteropServices;
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using System.Windows.Interop;
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namespace tsf_3074
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{
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public partial class HotkeyManager
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{
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private readonly System.Windows.Window _window;
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public HotkeyManager(System.Windows.Window window)
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{
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_window = window;
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}
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private HwndSource _source;
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private readonly Dictionary<int, OnEvent> _listener = new Dictionary<int, OnEvent>();
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private const int HotkeyIdStart = 9000;
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private int _hotkeyId = HotkeyIdStart;
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/**
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* Register a hotkey with given modifiers and virtual keys.
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* When the keybinding is pressed, the onEvent is invoked.
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*/
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public void RegisterHotkey(uint fsModifiers, uint vk, OnEvent onEvent)
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{
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var thisId = _hotkeyId++;
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RegisterHotKey(new WindowInteropHelper(_window).Handle, thisId, fsModifiers, vk);
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_listener[thisId] = onEvent;
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}
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public void UnregisterAllHotkeys()
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{
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var helper = new WindowInteropHelper(_window);
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while (_hotkeyId >= HotkeyIdStart)
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{
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UnregisterHotKey(helper.Handle, _hotkeyId--);
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}
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}
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/**
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* Add the hook to the Overlay window
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*/
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public void OnSourceInitialized()
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{
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_source = HwndSource.FromHwnd(new WindowInteropHelper(_window).Handle) ?? throw new Exception();
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_source.AddHook(HwndHook);
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}
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/**
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* Remove the hook from Overlay window
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*/
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public void OnClosed()
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{
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_source.RemoveHook(HwndHook);
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_source = null;
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UnregisterAllHotkeys();
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}
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/**
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* The callback for keybinding being pressed.
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* Don't change this function, use registerHotkey!
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*/
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private IntPtr HwndHook(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
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{
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if (msg != 0x0312) return IntPtr.Zero;
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var hotkeyId = wParam.ToInt32();
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if (OnHotKeyPressed(hotkeyId))
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{
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handled = true;
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}
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return IntPtr.Zero;
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}
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private bool OnHotKeyPressed(int hotkeyId)
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{
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var listener = _listener[hotkeyId];
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if (listener == null) return false;
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listener.Invoke();
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return true;
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}
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[DllImport("User32.dll")]
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private static extern bool RegisterHotKey(
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[In] IntPtr hWnd,
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[In] int id,
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[In] uint fsModifiers,
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[In] uint vk);
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[DllImport("User32.dll")]
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private static extern bool UnregisterHotKey(
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[In] IntPtr hWnd,
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[In] int id);
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}
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} |