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c#的HotKey简单封装
本来听说winapi里面的RegisterHotKey有时候不好使，于是打算用hook键盘消息来做hook key，结果发现hook那里处理消息那里还挺麻烦，也想会不会造成系统的额外开销比较大，所以最后用RegisterHotKey来封装了一下，测试没有问题，还是可以的。（winform）
下面的代码包括一个Textbox的处理，和一个封装了api的类。Textbox那里就是处理用户定义的热键的界面表示，比如用户按键的时候会出现"Ctrl+Alt+A"之类的，Api封装那里做了处理，只管Register好了，不用管UnRegister，当注册一个一样的Id的hotkey，会自动先UnRegister原来的，然后最后关闭窗口的时候，调用一下HotkeyHelper.Dispose()就可以了。还希望多加建议。here we go..
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Textbox部分：(Key hotkeyVk = null; )
private void txbHotKey_KeyDown(object sender, KeyEventArgs e)
{
txbHotKey.Text = string.Empty;
if (e.Control)
{
txbHotKey.Text += "Ctrl+";
}
if (e.Alt)
{
txbHotKey.Text += "Alt+";
}
if (e.Shift)
{
txbHotKey.Text += "Shift+";
}
if (e.KeyCode >= Keys.A && e.KeyCode <= Keys.Z)
{
if (e.Modifiers != Keys.None)
{
txbHotKey.Text += e.KeyCode.ToString();
hotkeyVk = e.KeyCode;
}
}
else if (e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9)
{
if (e.Modifiers != Keys.None)
{
txbHotKey.Text += e.KeyCode.ToString().Remove(0, 1);
hotkeyVk = e.KeyCode;
}
}
else if (e.KeyCode >= Keys.NumPad0 && e.KeyCode <= Keys.NumPad9)
{
if (e.Modifiers != Keys.None)
{
txbHotKey.Text += e.KeyCode.ToString().Replace("Pad", "");
hotkeyVk = e.KeyCode;
}
}
else if (e.KeyCode >= Keys.F1 && e.KeyCode <= Keys.F12)
{
txbHotKey.Text += e.KeyCode.ToString();
hotkeyVk = e.KeyCode;
}
e.SuppressKeyPress = false;
e.Handled = true;
}
private void txbHotKey_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = true;
}
private void txbHotKey_KeyUp(object sender, KeyEventArgs e)
{
CheckHotkey();
}
void txbHotKey_LostFocus(object sender, EventArgs e)
{
CheckHotkey();
}
private void CheckHotkey()
{
if (txbHotKey.Text.EndsWith("+") || txbHotKey.Text == string.Empty)
{
txbHotKey.Text = "无";
}
}
private void btnHotKey_Click(object sender, EventArgs e)
{
string hotkey = txbHotKey.Text.Replace("+", "");
if (hotkey != "无" && hotkey != string.Empty)
{
uint modifies = 0;
if (hotkey.Contains("Ctrl"))
{
modifies |= HotkeyHelper.MOD_CONTROL;
hotkey = hotkey.Replace("Ctrl", "");
}
if (hotkey.Contains("Alt"))
{
modifies |= HotkeyHelper.MOD_ALT;
hotkey = hotkey.Replace("Alt", "");
}
if (hotkey.Contains("Shift"))
{
modifies |= HotkeyHelper.MOD_SHIFT;
hotkey = hotkey.Replace("Shift", "");
}
GameProvider.HotkeyHelper.RegisterHotKey(this.Handle, hotkeyId, modifies, (uint)hotkeyVk);
}
}
HotkeyHelper部分：
using System;
using System.Collections.Generic;
using System.Text;
using GFSucker.Game.Utility;
namespace GFSucker.Game.Provider
{
public class HotkeyHelper : IDisposable
{
public const int MOD_ALT = 0x1;
public const int MOD_CONTROL = 0x2;
public const int MOD_SHIFT = 0x4;
public const int MOD_WIN = 0x8;
public const int WM_HOTKEY = 0x312;
private Dictionary dicHotkeys;
public HotkeyHelper()
{
dicHotkeys = new Dictionary();
}
public bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk)
{
if (dicHotkeys.ContainsKey(id))
{
if (dicHotkeys[id].IsRegistered)
{
UnregisterHotKey(dicHotkeys[id].HWnd, id); // unregister firstly
dicHotkeys[id].IsRegistered = false;
}
dicHotkeys[id].HWnd = hWnd; // set the new hwnd (normally should be the same)
}
else
{
dicHotkeys.Add(id, new Hotkey(hWnd, false));
}
dicHotkeys[id].IsRegistered = WinApi.RegisterHotKey(hWnd, id, fsModifiers, vk);
return dicHotkeys[id].IsRegistered;
}
private bool UnregisterHotKey(IntPtr hWnd, int id)
{
return WinApi.UnregisterHotKey(hWnd, id);
}
#region Hotkey Information
class Hotkey
{
public Hotkey(IntPtr hWnd, bool isRegistered)
{
_HWnd = hWnd;
_IsRegistered = isRegistered;
}
private IntPtr _HWnd;
public IntPtr HWnd
{
get { return _HWnd; }
set { _HWnd = value; }
}
private bool _IsRegistered;
public bool IsRegistered
{
get { return _IsRegistered; }
set { _IsRegistered = value; }
}
}
#endregion
#region IDisposable 成员
public void Dispose()
{
foreach (int id in dicHotkeys.Keys)
{
if (dicHotkeys[id].IsRegistered)
{
UnregisterHotKey(dicHotkeys[id].HWnd, id);
}
}
}
#endregion
}
}
Winapi声明：
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool UnregisterHotKey(IntPtr hWnd, int id);
Override winform窗体的WndProc:(就是接受到hotkey信息的时候，做你想做的东西)
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == HotkeyHelper.WM_HOTKEY)
{
MainForm mainform = this.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent as MainForm;
if (mainform != null)
{
if (mainform.WindowState == FormWindowState.Minimized)
{
mainform.WindowState = FormWindowState.Normal;
}
mainform.Activate();
}
}
}
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因为直接从程序中copy出来的，代码没有很多注释，不过都是非常浅显易懂的东西，名字看上去还是一目了然的，另外说一句，我觉得如果重构得比较好的代码是不需要做过多的注释的，代码本身就是注释，注释用在解释一些比较混乱的行为意图。希望对大家有帮助咯。
HotkeyHelper部分：
using System;
using System.Collections.Generic;
using System.Text;
using GFSucker.Game.Utility;
namespace GFSucker.Game.Provider
{
public class HotkeyHelper : IDisposable
{
public const int MOD_ALT = 0x1;
public const int MOD_CONTROL = 0x2;
public const int MOD_SHIFT = 0x4;
public const int MOD_WIN = 0x8;
public const int WM_HOTKEY = 0x312;
private Dictionary dicHotkeys;
public HotkeyHelper()
{
dicHotkeys = new Dictionary();
}
public bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk)
{
if (dicHotkeys.ContainsKey(id))
{
if (dicHotkeys[id].IsRegistered)
{
UnregisterHotKey(dicHotkeys[id].HWnd, id); // unregister firstly
dicHotkeys[id].IsRegistered = false;
}
dicHotkeys[id].HWnd = hWnd; // set the new hwnd (normally should be the same)
}
else
{
dicHotkeys.Add(id, new Hotkey(hWnd, false));
}
dicHotkeys[id].IsRegistered = WinApi.RegisterHotKey(hWnd, id, fsModifiers, vk);
return dicHotkeys[id].IsRegistered;
}
private bool UnregisterHotKey(IntPtr hWnd, int id)
{
return WinApi.UnregisterHotKey(hWnd, id);
}
#region Hotkey Information
class Hotkey
{
public Hotkey(IntPtr hWnd, bool isRegistered)
{
_HWnd = hWnd;
_IsRegistered = isRegistered;
}
private IntPtr _HWnd;
public IntPtr HWnd
{
get { return _HWnd; }
set { _HWnd = value; }
}
private bool _IsRegistered;
public bool IsRegistered
{
get { return _IsRegistered; }
set { _IsRegistered = value; }
}
}
#endregion
#region IDisposable 成员
public void Dispose()
{
foreach (int id in dicHotkeys.Keys)
{
if (dicHotkeys[id].IsRegistered)
{
UnregisterHotKey(dicHotkeys[id].HWnd, id);
}
}
}
#endregion
}
}
Winapi声明：
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool UnregisterHotKey(IntPtr hWnd, int id);
Override winform窗体的WndProc:(就是接受到hotkey信息的时候，做你想做的东西)
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == HotkeyHelper.WM_HOTKEY)
{
MainForm mainform = this.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent as MainForm;
if (mainform != null)
{
if (mainform.WindowState == FormWindowState.Minimized)
{
mainform.WindowState = FormWindowState.Normal;
}
mainform.Activate();
}
}
}
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因为直接从程序中copy出来的，代码没有很多注释，不过都是非常浅显易懂的东西，名字看上去还是一目了然的，另外说一句，我觉得如果重构得比较好的代码是不需要做过多的注释的，代码本身就是注释，注释用在解释一些比较混乱的行为意图。希望对大家有帮助咯。
