[英]Console check for pressed keys like in monogame
在我的控制台應用程序中,我希望能夠像在mono中那樣檢測按鍵的按下情況,在這里您可以獲得當前按下的按鍵的列表,並檢查按鍵是否在列表中,或者檢測是否按下了按鍵。 。 我的使用問題
if( Console.KeyAvailable ) k = Console.ReadKey( true ).Key;
我按下第一個鍵后會有延遲的事實。 如果打開記事本並按住“ A”,您可以看到一個示例。 A將被按下,然后被延遲,然后A將被發送垃圾郵件。
如何獲得鍵盤輸入而沒有按鍵之間的延遲? 我不怕使用低級功能,例如掛接到kernel32.dll
所以我根據到目前為止所讀的內容編寫了一些代碼。
步驟1:將以下代碼復制到控制台應用程序中。 它必須是STAThread,否則將引發錯誤。 在switch語句中輸入要使用的命令。 所有其他鍵將被ReadKey(true)阻止。
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.IO;
using System;
using System.Windows.Forms;
using System.Windows.Input;
namespace ConsoleApplication10
{
class Program
{
[STAThread]
static void Main(string[] args)
{
KeyListener.RegisterHotKey(Keys.A);
KeyListener.HotKeyPressed += new EventHandler<HotKeyEventArgs>(KeyListener_HotKeyPressed);
while (true)
{
Console.ReadKey(true);
}
}
static void KeyListener_HotKeyPressed(object sender, HotKeyEventArgs e)
{
switch (e.Key)
{
case Keys.A:
{
Console.WriteLine("Do stuff");
return;
}
default:
return;
}
}
}
}
步驟2:添加對System.Windows.Forms的引用。 您需要具有隱藏的Form,這對於鍵盤掛鈎的消息循環是必需的。
步驟3:添加以下靜態類。 它為您完成了所有繁重的鍵盤掛鈎,因此您不必這樣做。
using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Threading;
namespace ConsoleApplication10
{
public static class KeyListener
{
public static event EventHandler<HotKeyEventArgs> HotKeyPressed;
public static int RegisterHotKey(Keys key, KeyModifiers modifiers)
{
_windowReadyEvent.WaitOne();
int id = System.Threading.Interlocked.Increment(ref _id);
_wnd.Invoke(new RegisterHotKeyDelegate(RegisterHotKeyInternal), _hwnd, id, (uint)modifiers, (uint)key);
return id;
}
public static int RegisterHotKey(Keys key)
{
_windowReadyEvent.WaitOne();
int id = System.Threading.Interlocked.Increment(ref _id);
_wnd.Invoke(new RegisterHotKeyDelegate(RegisterHotKeyInternal), _hwnd, id, (uint)KeyModifiers.None, (uint)key);
return id;
}
public static void UnregisterHotKey(int id)
{
_wnd.Invoke(new UnRegisterHotKeyDelegate(UnRegisterHotKeyInternal), _hwnd, id);
}
delegate void RegisterHotKeyDelegate(IntPtr hwnd, int id, uint modifiers, uint key);
delegate void UnRegisterHotKeyDelegate(IntPtr hwnd, int id);
private static void RegisterHotKeyInternal(IntPtr hwnd, int id, uint modifiers, uint key)
{
RegisterHotKey(hwnd, id, modifiers, key);
}
private static void UnRegisterHotKeyInternal(IntPtr hwnd, int id)
{
UnregisterHotKey(_hwnd, id);
}
private static void OnHotKeyPressed(HotKeyEventArgs e)
{
if (KeyListener.HotKeyPressed != null)
{
KeyListener.HotKeyPressed(null, e);
}
}
private static volatile MessageWindow _wnd;
private static volatile IntPtr _hwnd;
private static ManualResetEvent _windowReadyEvent = new ManualResetEvent(false);
static KeyListener()
{
Thread messageLoop = new Thread(delegate ()
{
Application.Run(new MessageWindow());
});
messageLoop.Name = "MessageLoopThread";
messageLoop.IsBackground = true;
messageLoop.Start();
}
private class MessageWindow : Form
{
public MessageWindow()
{
_wnd = this;
_hwnd = this.Handle;
_windowReadyEvent.Set();
}
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_HOTKEY)
{
HotKeyEventArgs e = new HotKeyEventArgs(m.LParam);
KeyListener.OnHotKeyPressed(e);
}
base.WndProc(ref m);
}
protected override void SetVisibleCore(bool value)
{
// Ensure the window never becomes visible
base.SetVisibleCore(false);
}
private const int WM_HOTKEY = 0x312;
}
[DllImport("user32", SetLastError = true)]
private static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);
[DllImport("user32", SetLastError = true)]
private static extern bool UnregisterHotKey(IntPtr hWnd, int id);
private static int _id = 0;
}
public class HotKeyEventArgs : EventArgs
{
public readonly Keys Key;
public readonly KeyModifiers Modifiers;
public HotKeyEventArgs(Keys key, KeyModifiers modifiers)
{
this.Key = key;
this.Modifiers = modifiers;
}
public HotKeyEventArgs(IntPtr hotKeyParam)
{
uint param = (uint)hotKeyParam.ToInt64();
Key = (Keys)((param & 0xffff0000) >> 16);
Modifiers = (KeyModifiers)(param & 0x0000ffff);
}
}
[Flags]
public enum KeyModifiers
{
None = 0,
Alt = 1,
Control = 2,
Shift = 4,
Windows = 8,
NoRepeat = 0x4000
}
}
第四步:
現在,仍然有延遲。 它的方式更優雅,但是您仍然需要操作系統來對抗您。 那么該怎么辦?
您有兩個選擇。
a)您實現了一個計時選項,並且只要在計時器滴答事件中按下了一個鍵,您就只需重復該操作即可。 您可以復制代碼,也可以將其與我提供的熱鍵方法合並。
有關詳細信息,請參見此處: 消除KeyDown事件后的延遲?
private bool _moveUp;
private bool _moveDown;
private bool _moveLeft;
private bool _moveRight;
// You can add the Timer in the Winforms Designer instead if you like;
// The Interval property can be configured there at the same time, along
// with the Tick event handler, simplifying the non-Designer code here.
private System.Windows.Forms.Timer _movementTimer = new Timer { Interval = 100 };
public MainForm()
{
InitializeComponent();
_movementTimer.Tick += movementTimer_Tick;
}
private void movementTimer_Tick(object sender, EventArgs e)
{
_DoMovement();
}
private void _DoMovement()
{
if (_moveLeft) Player.MoveLeft();
if (_moveRight) Player.MoveRight();
if (_moveUp) Player.MoveUp();
if (_moveDown) Player.MoveDown();
}
// You could of course override the OnKeyDown() method instead,
// assuming the handler is in the Form subclass generating the
// the event.
public void MainForm_KeyDown(object sender, KeyEventArgs e)
{
if (e.IsRepeat)
{
// Ignore key repeats...let the timer handle that
return;
}
switch (e.KeyCode)
{
case Keys.Up:
_moveUp = true;
break;
case Keys.Down:
_moveDown = true;
break;
case Keys.Left:
_moveLeft = true;
break;
case Keys.Right:
_moveRight = true;
break;
}
_DoMovement();
_movementTimer.Start();
}
public void MainForm_KeyUp(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Up:
_moveUp = false;
break;
case Keys.Down:
_moveDown = false;
break;
case Keys.Left:
_moveLeft = false;
break;
case Keys.Right:
_moveRight = false;
break;
}
if (!(_moveUp || _moveDown || _moveLeft || _moveRight))
{
_movementTimer.Stop();
}
}
b)在您的Main方法中,獲得延遲設置,以編程方式將延遲設置為最低設置,然后在Application Exit上將其重新設置為原始設置。
在此處找到在注冊表中的位置: https : //superuser.com/questions/388160/keyboard-repeat-rate-repeat-delay-values-in-win7
以及如何讀取/寫入注冊表: https : //msdn.microsoft.com/zh-cn/library/microsoft.win32.registry_methods(v=vs.110).aspx
注意:使用這種方法,仍然會有一些延遲。 它很小,但是在那里。 祝好運。
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