从CEdit派生一个只允许输入16进制数据的新类

//从CEdit派生一个只允许输入16进制数据的新类//支持输入空格 0-F Backspace//在激活时切换输入法至英文键盘//在失去焦点时恢复输入法//遇非法字符时有警示音提示

#pragma once// CHexEditCtrlclass CHexEditCtrl : public CEdit{DECLARE_DYNAMIC(CHexEditCtrl)public:CHexEditCtrl();virtual ~CHexEditCtrl();protected:afx_msg void OnEnSetfocus();afx_msg void OnEnKillfocus();DECLARE_MESSAGE_MAP()virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);//输入法protected:HKL m_DefaultHKL;HKL m_Saved_KbdLayout;HKL GetDefault_KbdLayout();};

// HexEditCtrl.cpp : implementation file//#include "stdafx.h"#include "HexEditCtrl.h"// CHexEditCtrlIMPLEMENT_DYNAMIC(CHexEditCtrl, CEdit)CHexEditCtrl::CHexEditCtrl(){m_DefaultHKL = GetDefault_KbdLayout();m_Saved_KbdLayout = 0; }CHexEditCtrl::~CHexEditCtrl(){}BEGIN_MESSAGE_MAP(CHexEditCtrl, CEdit)ON_CONTROL_REFLECT(EN_SETFOCUS, &CHexEditCtrl::OnEnSetfocus)ON_CONTROL_REFLECT(EN_KILLFOCUS, &CHexEditCtrl::OnEnKillfocus)END_MESSAGE_MAP()// CHexEditCtrl message handlersLRESULT CHexEditCtrl::WindowProc(UINT message, WPARAM wParam, LPARAM lParam){// TODO: Add your specialized code here and/or call the base class//过滤其它字符//允许空格 0-F Backspaceif(message == WM_CHAR){WCHAR szInput[2] = {(WCHAR)wParam, 0};_tcsupr_s(szInput);CStringW szValidItem=L" 0123456789ABCDEF\b";if(szValidItem.Find(szInput) == -1){MessageBeep(-1);//警示音return 0;}wParam = szInput[0];}if(WM_INPUTLANGCHANGEREQUEST == message) //切换输入法消息{return 0; //锁定输入法//m_Saved_KbdLayout = 0; //接受该变且不需要恢复输入法}return CEdit::WindowProc(message, wParam, lParam);}void CHexEditCtrl::OnEnSetfocus(){// TODO: Add your control notification handler code hereif(m_DefaultHKL){HKL CurKbdLayout = GetKeyboardLayout(0);if(CurKbdLayout != m_DefaultHKL){m_Saved_KbdLayout = CurKbdLayout; //保存输入法if(ActivateKeyboardLayout(m_DefaultHKL, 0) == 0) //设置为默认输入法{TRACE( _T("Set ActivateKeyboardLayout Err=%d"), GetLastError());}}} }void CHexEditCtrl::OnEnKillfocus(){// TODO: Add your control notification handler code hereif(m_Saved_KbdLayout) //恢复输入法{if(ActivateKeyboardLayout(m_Saved_KbdLayout, 0) == 0)TRACE( _T("Restore ActivateKeyboardLayout Err=%d"), GetLastError());m_Saved_KbdLayout = 0;} }//获取英文键盘HKL CHexEditCtrl::GetDefault_KbdLayout() {HKL HKL_Ret= 0;int nSize = GetKeyboardLayoutList(0 , 0);if(nSize != 0){HKL FAR * lpList = (HKL FAR *)new HKL[nSize];ZeroMemory(lpList, sizeof(HKL) * nSize);if(GetKeyboardLayoutList(nSize, lpList) == nSize){for(int i=0; i<nSize; i++){HKL Val = lpList[i];if(HIWORD(Val) == LOWORD(Val))HKL_Ret = Val;TRACE( _T("0x%08X/n"), Val);}}delete []lpList;}return HKL_Ret; }

//应用示例

// MFC_1Dlg.h : 头文件//#pragma once#include "HexEditCtrl.h"// CMFC_Dlg 对话框class CMFC_Dlg : public CDialog{protected:CHexEditCtrl m_Edit;virtual void DoDataExchange(CDataExchange* pDX);// DDX/DDV 支持

// MFC_1Dlg.cpp : 实现文件//void CMFC_Dlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);DDX_Control(pDX, IDC_EDIT, m_Edit);}

，记录沿途的心情。那样的生活才是我想要的。

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