How to intercept the input method input result of the control with text input C #
original Mu Yuyingfeng was last published on 2016-05-31 19:24:15 Reading number 2207 Favorites
Expand
Recently, I am developing a serial terminal software, which needs to realize the input of Chinese characters Similar to the Hyper Terminal, input a Chinese character or a string of Chinese characters and send it to the serial port immediately.
For letters, it's very simple, you can monitor the keys. If it is Chinese characters, it won't work. Because Chinese characters are input by the input method, the text control does not support input method input to generate events. So we need to find another way.
I searched online for a long time, but I never found a good solution.
Refer to this blog and click to open the link
Found the idea, but the landlord did not solve the problem perfectly. So I solved the problem completely based on him
The first is how to get the result of the input method
code show as below:
</pre><pre name="code" class="csharp">eGCS_RESULTSTR = 0x0800,
public class GetImeComposition
{
[DllImport("Imm32.dll")]
public static extern IntPtr ImmGetContext(IntPtr hWnd);
[DllImport("Imm32.dll")]
public static extern bool ImmReleaseContext(IntPtr hWnd, IntPtr hIMC);
[DllImport("Imm32.dll", CharSet = CharSet.Unicode)]
private static extern int ImmGetCompositionStringW(IntPtr hIMC, int dwIndex, byte[] lpBuf, int dwBufLen); IntPtr hIMC = ImmGetContext (handle); { public string CurrentCompStr (IntPtr handle) * * / * handle handle of the control to be processed
/ *
try
{
int strLen = ImmGetCompositionStringW(hIMC, (int)emImeGcs.eGCS_RESULTSTR, null, 0);
if (strLen > 0)
{
byte[] buffer = new byte[strLen];
ImmGetCompositionStringW(hIMC, (int)emImeGcs.eGCS_RESULTSTR, buffer, strLen);
return Encoding.Unicode.GetString(buffer);
}
else
{
return string.Empty;
}
}
finally
{
ImmReleaseContext(handle, hIMC);
}
}
}
Next is the custom control.
Different controls need to create different classes. Here I use RichTextBox
public class CmdRichTextBox : RichTextBox
{
public delegate void PrecessImeStrCallBack(string str);
public PrecessImeStrCallBack ProcessIme = null;
private GetImeComposition getImeStr = new GetImeComposition();
string imeStr;
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
//判断系统消息的ID号
//case (int)emWinMsg.eWM_TIMECHANGE:
//case (int)emWinMsg.eWM_IME_STARTCOMPOSITION:
//case (int)emWinMsg.eWM_IME_ENDCOMPOSITION:
case (int)emWinMsg.eWM_IME_COMPOSITION:
//case (int)emWinMsg.eWM_IME_KEYLAST:
//case (int)emWinMsg.eWM_TIMER:
case (int)emWinMsg.eWM_IME_SETCONTEXT:
//case (int)emWinMsg.eWM_IME_NOTIFY:
//case (int)emWinMsg.eWM_IME_CONTROL:
//case (int)emWinMsg.eWM_IME_COMPOSITIONFULL:
//case (int)emWinMsg.eWM_IME_SELECT:
//case (int)emWinMsg.eWM_IME_CHAR:
//case (int)emWinMsg.eWM_IME_REQUEST:
//case (int)emWinMsg.eWM_IME_KEYDOWN:
//case (int)emWinMsg.eWM_IME_KEYUP:
break;
case (int)emWinMsg.eWM_IME_ENDCOMPOSITION:
imeStr = getImeStr.CurrentCompStr(this.Handle);
//Debug.WriteLine(imeStr);
if (ProcessIme != null)
{
ProcessIme(imeStr);
}
break;
default:
base.WndProc(ref m);
break;
}
}
}
Attach enumeration value definition
public enum emWinMsg
{
eWM_NULL = 0x0000,
eWM_CREATE = 0x0001,
eWM_DESTROY = 0x0002,
eWM_MOVE = 0x0003,
eWM_SIZE = 0x0005,
eWM_ACTIVATE = 0x0006,
eWM_SETFOCUS = 0x0007,
eWM_KILLFOCUS = 0x0008,
eWM_ENABLE = 0x000A,
eWM_SETREDRAW = 0x000B,
eWM_SETTEXT = 0x000C,
eWM_GETTEXT = 0x000D,
eWM_GETTEXTLENGTH = 0x000E,
eWM_PAINT = 0x000F,
eWM_CLOSE = 0x0010,
eWM_QUERYENDSESSION = 0x0011,
eWM_QUIT = 0x0012,
eWM_QUERYOPEN = 0x0013,
eWM_ERASEBKGND = 0x0014,
eWM_SYSCOLORCHANGE = 0x0015,
eWM_ENDSESSION = 0x0016,
eWM_SHOWWINDOW = 0x0018,
eWM_CTLCOLOR = 0x0019,
eWM_WININICHANGE = 0x001A,
eWM_SETTINGCHANGE = 0x001A,
eWM_DEVMODECHANGE = 0x001B,
eWM_ACTIVATEAPP = 0x001C,
eWM_FONTCHANGE = 0x001D,
eWM_TIMECHANGE = 0x001E,
eWM_CANCELMODE = 0x001F,
eWM_SETCURSOR = 0x0020,
eWM_MOUSEACTIVATE = 0x0021,
eWM_CHILDACTIVATE = 0x0022,
eWM_QUEUESYNC = 0x0023,
eWM_GETMINMAXINFO = 0x0024,
eWM_PAINTICON = 0x0026,
eWM_ICONERASEBKGND = 0x0027,
eWM_NEXTDLGCTL = 0x0028,
eWM_SPOOLERSTATUS = 0x002A,
eWM_DRAWITEM = 0x002B,
eWM_MEASUREITEM = 0x002C,
eWM_DELETEITEM = 0x002D,
eWM_VKEYTOITEM = 0x002E,
eWM_CHARTOITEM = 0x002F,
eWM_SETFONT = 0x0030,
eWM_GETFONT = 0x0031,
eWM_SETHOTKEY = 0x0032,
eWM_GETHOTKEY = 0x0033,
eWM_QUERYDRAGICON = 0x0037,
eWM_COMPAREITEM = 0x0039,
eWM_GETOBJECT = 0x003D,
eWM_COMPACTING = 0x0041,
eWM_COMMNOTIFY = 0x0044,
eWM_WINDOWPOSCHANGING = 0x0046,
eWM_WINDOWPOSCHANGED = 0x0047,
eWM_POWER = 0x0048,
eWM_COPYDATA = 0x004A,
eWM_CANCELJOURNAL = 0x004B,
eWM_NOTIFY = 0x004E,
eWM_INPUTLANGCHANGEREQUEST = 0x0050,
eWM_INPUTLANGCHANGE = 0x0051,
eWM_TCARD = 0x0052,
eWM_HELP = 0x0053,
eWM_USERCHANGED = 0x0054,
eWM_NOTIFYFORMAT = 0x0055,
eWM_CONTEXTMENU = 0x007B,
eWM_STYLECHANGING = 0x007C,
eWM_STYLECHANGED = 0x007D,
eWM_DISPLAYCHANGE = 0x007E,
eWM_GETICON = 0x007F,
eWM_SETICON = 0x0080,
eWM_NCCREATE = 0x0081,
eWM_NCDESTROY = 0x0082,
eWM_NCCALCSIZE = 0x0083,
eWM_NCHITTEST = 0x0084,
eWM_NCPAINT = 0x0085,
eWM_NCACTIVATE = 0x0086,
eWM_GETDLGCODE = 0x0087,
eWM_SYNCPAINT = 0x0088,
eWM_NCMOUSEMOVE = 0x00A0,
eWM_NCLBUTTONDOWN = 0x00A1,
eWM_NCLBUTTONUP = 0x00A2,
eWM_NCLBUTTONDBLCLK = 0x00A3,
eWM_NCRBUTTONDOWN = 0x00A4,
eWM_NCRBUTTONUP = 0x00A5,
eWM_NCRBUTTONDBLCLK = 0x00A6,
eWM_NCMBUTTONDOWN = 0x00A7,
eWM_NCMBUTTONUP = 0x00A8,
eWM_NCMBUTTONDBLCLK = 0x00A9,
eWM_KEYDOWN = 0x0100,
eWM_KEYUP = 0x0101,
eWM_CHAR = 0x0102,
eWM_DEADCHAR = 0x0103,
eWM_SYSKEYDOWN = 0x0104,
eWM_SYSKEYUP = 0x0105,
eWM_SYSCHAR = 0x0106,
eWM_SYSDEADCHAR = 0x0107,
eWM_KEYLAST = 0x0108,
eWM_IME_STARTCOMPOSITION = 0x010D,
eWM_IME_ENDCOMPOSITION = 0x010E,
eWM_IME_COMPOSITION = 0x010F,
eWM_IME_KEYLAST = 0x010F,
eWM_INITDIALOG = 0x0110,
eWM_COMMAND = 0x0111,
eWM_SYSCOMMAND = 0x0112,
eWM_TIMER = 0x0113,
eWM_HSCROLL = 0x0114,
eWM_VSCROLL = 0x0115,
eWM_INITMENU = 0x0116,
eWM_INITMENUPOPUP = 0x0117,
eWM_MENUSELECT = 0x011F,
eWM_MENUCHAR = 0x0120,
eWM_ENTERIDLE = 0x0121,
eWM_MENURBUTTONUP = 0x0122,
eWM_MENUDRAG = 0x0123,
eWM_MENUGETOBJECT = 0x0124,
eWM_UNINITMENUPOPUP = 0x0125,
eWM_MENUCOMMAND = 0x0126,
eWM_CTLCOLORWinMsgBOX = 0x0132,
eWM_CTLCOLOREDIT = 0x0133,
eWM_CTLCOLORLISTBOX = 0x0134,
eWM_CTLCOLORBTN = 0x0135,
eWM_CTLCOLORDLG = 0x0136,
eWM_CTLCOLORSCROLLBAR = 0x0137,
eWM_CTLCOLORSTATIC = 0x0138,
eWM_MOUSEMOVE = 0x0200,
eWM_LBUTTONDOWN = 0x0201,
eWM_LBUTTONUP = 0x0202,
eWM_LBUTTONDBLCLK = 0x0203,
eWM_RBUTTONDOWN = 0x0204,
eWM_RBUTTONUP = 0x0205,
eWM_RBUTTONDBLCLK = 0x0206,
eWM_MBUTTONDOWN = 0x0207,
eWM_MBUTTONUP = 0x0208,
eWM_MBUTTONDBLCLK = 0x0209,
eWM_MOUSEWHEEL = 0x020A,
eWM_PARENTNOTIFY = 0x0210,
eWM_ENTERMENULOOP = 0x0211,
eWM_EXITMENULOOP = 0x0212,
eWM_NEXTMENU = 0x0213,
eWM_SIZING = 0x0214,
eWM_CAPTURECHANGED = 0x0215,
eWM_MOVING = 0x0216,
eWM_DEVICECHANGE = 0x0219,
eWM_MDICREATE = 0x0220,
eWM_MDIDESTROY = 0x0221,
eWM_MDIACTIVATE = 0x0222,
eWM_MDIRESTORE = 0x0223,
eWM_MDINEXT = 0x0224,
eWM_MDIMAXIMIZE = 0x0225,
eWM_MDITILE = 0x0226,
eWM_MDICASCADE = 0x0227,
eWM_MDIICONARRANGE = 0x0228,
eWM_MDIGETACTIVE = 0x0229,
eWM_MDISETMENU = 0x0230,
eWM_ENTERSIZEMOVE = 0x0231,
eWM_EXITSIZEMOVE = 0x0232,
eWM_DROPFILES = 0x0233,
eWM_MDIREFRESHMENU = 0x0234,
eWM_IME_SETCONTEXT = 0x0281,
eWM_IME_NOTIFY = 0x0282,
eWM_IME_CONTROL = 0x0283,
eWM_IME_COMPOSITIONFULL = 0x0284,
eWM_IME_SELECT = 0x0285,
eWM_IME_CHAR = 0x0286,
eWM_IME_REQUEST = 0x0288,
eWM_IME_KEYDOWN = 0x0290,
eWM_IME_KEYUP = 0x0291,
eWM_MOUSEHOVER = 0x02A1,
eWM_MOUSELEAVE = 0x02A3,
eWM_CUT = 0x0300,
eWM_COPY = 0x0301,
eWM_PASTE = 0x0302,
eWM_CLEAR = 0x0303,
eWM_UNDO = 0x0304,
eWM_RENDERFORMAT = 0x0305,
eWM_RENDERALLFORMATS = 0x0306,
eWM_DESTROYCLIPBOARD = 0x0307,
eWM_DRAWCLIPBOARD = 0x0308,
eWM_PAINTCLIPBOARD = 0x0309,
eWM_VSCROLLCLIPBOARD = 0x030A,
eWM_SIZECLIPBOARD = 0x030B,
eWM_ASKCBFORMATNAME = 0x030C,
eWM_CHANGECBCHAIN = 0x030D,
eWM_HSCROLLCLIPBOARD = 0x030E,
eWM_QUERYNEWPALETTE = 0x030F,
eWM_PALETTEISCHANGING = 0x0310,
eWM_PALETTECHANGED = 0x0311,
eWM_HOTKEY = 0x0312,
eWM_PRINT = 0x0317,
eWM_PRINTCLIENT = 0x0318,
eWM_HANDHELDFIRST = 0x0358,
eWM_HANDHELDLAST = 0x035F,
eWM_AFXFIRST = 0x0360,
eWM_AFXLAST = 0x037F,
eWM_PENWINFIRST = 0x0380,
eWM_PENWINLAST = 0x038F,
eWM_APP = 0x8000,
eWM_USER = 0x0400,
eWM_REFLECT = eWM_USER + 0x1c00
}
————————————————
Copyright Statement: This article is an original article of CSDN blogger "Mu Yu Ying Feng", following the CC 4.0 BY-SA copyright agreement, please attach the original source link and reprint This statement.
Original link: https://blog.csdn.net/zhanddkk/article/details/51548335
