使用全局热键:获取实际按下的键
Using Global Hotkeys: Get key that was actually pressed
在我的 form
中,我注册了不同的热键。后来在执行过程中,我想知道实际上按下了哪个热键。我可以从哪里获取该信息?
正在初始化期间注册:
public Form1()
{
this.KeyPreview = true;
ghk = new KeyHandler(Keys.F1, this);
ghk.Register();
ghk = new KeyHandler(Keys.F2, this);
ghk.Register();
InitializeComponent();
}
使用这个 KeyHandler Class:
public class KeyHandler
{
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private int key;
private IntPtr hWnd;
private int id;
public KeyHandler(Keys key, Form form)
{
this.key = (int)key;
this.hWnd = form.Handle;
id = this.GetHashCode();
}
public override int GetHashCode()
{
return key ^ hWnd.ToInt32();
}
public bool Register()
{
return RegisterHotKey(hWnd, id, 0, key);
}
public bool Unregister()
{
return UnregisterHotKey(hWnd, id);
}
}
触发的方法:
protected override void WndProc(ref Message m)
{
if (m.Msg == Constants.WmHotkeyMsgId)
HandleHotkey(m);
base.WndProc(ref m);
}
这里我要区分两个热键:
private void HandleHotkey(Message m)
{
if(key == F1)
DoSomething
if(key == F2)
DoSomethingElse
}
你应该可以通过id知道真正的密钥。当您注册热键时,您会使用一个 ID、一个键和一个修饰符。按下热键时,Windows 会在回调中为您提供热键的 ID,而不是按键和修饰符。
RegisterHotKey(Handle, id: 1, ModifierKeys.Control, Keys.A);
RegisterHotKey(Handle, id: 2, ModifierKeys.Control | ModifierKeys.Alt, Keys.B);
const int WmHotKey = 786;
if (msg.message != WmHotKey)
return;
var id = (int)msg.wParam;
if (id == 1) // Ctrl + A
{
}
else if (id == 2) // Ctrl + Alt + B
{
}
这是一篇博客 post 我编写了用于为 WPF 应用程序注册热键的代码:
https://www.meziantou.net/2012/06/28/hotkey-global-shortcuts
在我的 form
中,我注册了不同的热键。后来在执行过程中,我想知道实际上按下了哪个热键。我可以从哪里获取该信息?
正在初始化期间注册:
public Form1()
{
this.KeyPreview = true;
ghk = new KeyHandler(Keys.F1, this);
ghk.Register();
ghk = new KeyHandler(Keys.F2, this);
ghk.Register();
InitializeComponent();
}
使用这个 KeyHandler Class:
public class KeyHandler
{
[DllImport("user32.dll")]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, int fsModifiers, int vk);
[DllImport("user32.dll")]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private int key;
private IntPtr hWnd;
private int id;
public KeyHandler(Keys key, Form form)
{
this.key = (int)key;
this.hWnd = form.Handle;
id = this.GetHashCode();
}
public override int GetHashCode()
{
return key ^ hWnd.ToInt32();
}
public bool Register()
{
return RegisterHotKey(hWnd, id, 0, key);
}
public bool Unregister()
{
return UnregisterHotKey(hWnd, id);
}
}
触发的方法:
protected override void WndProc(ref Message m)
{
if (m.Msg == Constants.WmHotkeyMsgId)
HandleHotkey(m);
base.WndProc(ref m);
}
这里我要区分两个热键:
private void HandleHotkey(Message m)
{
if(key == F1)
DoSomething
if(key == F2)
DoSomethingElse
}
你应该可以通过id知道真正的密钥。当您注册热键时,您会使用一个 ID、一个键和一个修饰符。按下热键时,Windows 会在回调中为您提供热键的 ID,而不是按键和修饰符。
RegisterHotKey(Handle, id: 1, ModifierKeys.Control, Keys.A);
RegisterHotKey(Handle, id: 2, ModifierKeys.Control | ModifierKeys.Alt, Keys.B);
const int WmHotKey = 786;
if (msg.message != WmHotKey)
return;
var id = (int)msg.wParam;
if (id == 1) // Ctrl + A
{
}
else if (id == 2) // Ctrl + Alt + B
{
}
这是一篇博客 post 我编写了用于为 WPF 应用程序注册热键的代码: https://www.meziantou.net/2012/06/28/hotkey-global-shortcuts