好的,基本上我希望能够检索键盘文本.就像将文本输入文本字段或其他内容一样.我只是为Windows编写游戏.我忽略了使用Guide.BeginShowKeyboardInput,因为它打破了自包含游戏的感觉,而且指南总是显示XBOX按钮的事实对我来说也不合适.是的,这是最简单的方法,但我不喜欢它.
接下来我尝试使用System.Windows.Forms.NativeWindow.我创建了一个继承自它的类,并将其传递给了Games窗口句柄,实现了WndProc函数来捕获WM_CHAR(或WM_KEYDOWN),尽管WndProc被调用了其他消息,WM_CHAR和WM_KEYDOWN从未这样做过.所以我不得不放弃这个想法,此外,我还引用了整个Windows窗体,这意味着不必要的内存占用空间.
所以我的最后一个想法是创建一个Thread级别的低级键盘钩子.到目前为止,这是最成功的.我收到WM_KEYDOWN消息,(还没试过WM_CHAR)将虚拟键码与Win32函数MapVirtualKey一起转换为char.我收到了我的文字!(我现在只是用Debug.Write打印)
但是有几个问题.好像我有大写锁定,并且没有响应的移位键.(当然不是,它只是每个键只有一个虚拟键代码,所以只翻译它有一个输出)并且它增加了开销,因为它将自己附加到Windows Hook列表并且没有我那么快d喜欢它,但缓慢可能更多是由于Debug.Write.
有没有其他人接近这个并解决它,而不必求助于屏幕键盘?还是有人有进一步的想法让我尝试?
提前致谢.
吉米问的问题
也许我不理解这个问题,但为什么你不能使用XNA Keyboard和KeyboardState类?
我的评论:
这是因为虽然您可以读取键状态,但您无法访问键入的文本以及用户键入的方式.
所以让我进一步澄清一下.我想实现能够从用户读取文本输入,就好像他们在文本框中键入是Windows.键盘和KeyboardState类获取所有键的状态,但我必须将每个键和组合映射到它的字符表示.当用户不使用与我特别使用的符号相同的键盘语言时(我的双引号是shift + 2,而美国键盘在返回键附近的某处),这就会失败.
似乎我的窗口挂钩是要走的路,只是我没有得到WM_CHAR的原因是因为XNA消息泵不做翻译消息.
每当我收到WM _
KEYDOWN消息时添加TranslateMessage 意味着我得到了WM_CHAR消息,然后我用它在我的MessageHuff类中触发了一个字符类型的事件,我的KeyboardBuffer类已订阅了该事件,然后将其缓冲到文本缓冲区:D(或StringBuilder,但结果是一样的)
所以我按照自己的意愿工作.
非常感谢Jimmy提供了一个非常丰富的线索链接.
用于在XNA中添加Windows挂钩
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Runtime.InteropServices; using System.Diagnostics; using System.Reflection; /* Author: Sekhat * * License: Public Domain. * * Usage: * * Inherit from this class, and override the WndProc function in your derived class, * in which you handle your windows messages. * * To start recieving the message, create an instance of your derived class, passing in the * window handle of the window you want to listen for messages for. * * in XNA: this would be the Game.Window.Handle property * in Winforms Form.Handle property */ namespace WindowsHookExample { public abstract class WindowsHook : IDisposable { IntPtr hHook; IntPtr hWnd; // Stored here to stop it from getting garbage collected Win32.WndProcDelegate wndProcDelegate; public WindowsHook(IntPtr hWnd) { this.hWnd = hWnd; wndProcDelegate = WndProcHook; CreateHook(); } ~WindowsHook() { Dispose(false); } private void CreateHook() { uint threadId = Win32.GetWindowThreadProcessId(hWnd, IntPtr.Zero); hHook = Win32.SetWindowsHookEx(Win32.HookType.WH_CALLWNDPROC, wndProcDelegate, IntPtr.Zero, threadId); } private int WndProcHook(int nCode, IntPtr wParam, ref Win32.Message lParam) { if (nCode >= 0) { Win32.TranslateMessage(ref lParam); // You may want to remove this line, if you find your not quite getting the right messages through. This is here so that WM_CHAR is correctly called when a key is pressed. WndProc(ref lParam); } return Win32.CallNextHookEx(hHook, nCode, wParam, ref lParam); } protected abstract void WndProc(ref Win32.Message message); #region Interop Stuff // I say thankya to P/Invoke.net. // Contains all the Win32 functions I need to deal with protected static class Win32 { public enum HookType : int { WH_JOURNALRECORD = 0, WH_JOURNALPLAYBACK = 1, WH_KEYBOARD = 2, WH_GETMESSAGE = 3, WH_CALLWNDPROC = 4, WH_CBT = 5, WH_SYSMSGFILTER = 6, WH_MOUSE = 7, WH_HARDWARE = 8, WH_DEBUG = 9, WH_SHELL = 10, WH_FOREGROUNDIDLE = 11, WH_CALLWNDPROCRET = 12, WH_KEYBOARD_LL = 13, WH_MOUSE_LL = 14 } public struct Message { public IntPtr lparam; public IntPtr wparam; public uint msg; public IntPtr hWnd; } ////// Defines the windows proc delegate to pass into the windows hook /// public delegate int WndProcDelegate(int nCode, IntPtr wParam, ref Message m); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern IntPtr SetWindowsHookEx(HookType hook, WndProcDelegate callback, IntPtr hMod, uint dwThreadId); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern bool UnhookWindowsHookEx(IntPtr hhk); [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern int CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, ref Message m); [DllImport("coredll.dll", SetLastError = true)] public static extern IntPtr GetModuleHandle(string module); [DllImport("user32.dll", EntryPoint = "TranslateMessage")] public extern static bool TranslateMessage(ref Message m); [DllImport("user32.dll")] public extern static uint GetWindowThreadProcessId(IntPtr window, IntPtr module); } #endregion #region IDisposable Members public void Dispose() { Dispose(true); } private void Dispose(bool disposing) { if (disposing) { // Free managed resources here } // Free unmanaged resources here if (hHook != IntPtr.Zero) { Win32.UnhookWindowsHookEx(hHook); } } #endregion } }