帶有菜單的EDIT控件實現(xiàn)

1、帶有菜單的EDIT 控件實現(xiàn)eidt 控制是vc 中經(jīng)常使用的文本輸入輸出交互控制，有的時候，我們?yōu)榱藢崿F(xiàn)對輸入，輸出有特殊的操作過程，那么，原來的edit 控制的功能也許就不一定能實現(xiàn)我們的要求，或者實現(xiàn)的不是那么靈活，因此，我們也經(jīng)常在edit 控件的基礎上繼承基類來做一些配生的子類情況下實現(xiàn)我們自己在工程中需要的特殊的要求。本文介紹一個可以帶有菜單操作的edit 類的實現(xiàn)過程，基礎類eidt 基類，在繼承的子類上添加各個菜單操作功能，其中的菜單操作也是為了實現(xiàn)多edit 中的文本進行各種文本的常規(guī)操作。這個類的實現(xiàn)過程如下：。h 文件#if !defined(AFX_MENUEDIT_H

2、_8EA53611_FD2B_11D4_B625_D04FA07D2222_INCLUDED_)#define AFX_MENUEDIT_H_8EA53611_FD2B_11D4_B625_D04FA07D2222_INCLUDED_#if _MSC_VER > 1000#pragma once#endifclass CMenuEdit : public CEditpublic:CMenuEdit() ;protected:virtual BOOL OnCommand(WPARAM wParam, LPARAM lParam);afx_msg void OnContextMenu(CWn

3、d* pWnd, CPoint point);DECLARE_MESSAGE_MAP();#endif。 cpp 文件#include "stdafx.h"#include "MenuEdit.h"#ifdef _DEBUG#define new DEBUG_NEW#undef THIS_FILEstatic char THIS_FILE = _FILE_;#endif#define MES_UNDO_T("&Undo")#define MES_CUT_T("Cu&t")#define MES_CO

4、PY_T("&Copy")#define MES_PASTE_T("&Paste")#define MES_DELETE_T("&Delete")#define MES_SELECTALL_T("Select &All")#define ME_SELECTALL WM_USER + 0x7000BEGIN_MESSAGE_MAP(CMenuEdit, CEdit)ON_WM_CONTEXTMENU()END_MESSAGE_MAP()void CMenuEdit:OnContextM

5、enu(CWnd* pWnd, CPoint point)SetFocus();CMenu menu;menu.CreatePopupMenu();BOOL bReadOnly = GetStyle() & ES_READONLY;DWORD flags = CanUndo() && !bReadOnly ? 0 : MF_GRAYED;menu.InsertMenu(0, MF_BYPOSITION | flags, EM_UNDO,MES_UNDO);menu.InsertMenu(1, MF_BYPOSITION | MF_SEPARATOR);DWORD sel

6、 = GetSel();flags = LOWORD(sel) = HIWORD(sel) ? MF_GRAYED : 0;menu.InsertMenu(2, MF_BYPOSITION | flags, WM_COPY,MES_COPY);flags = (flags = MF_GRAYED | bReadOnly) ? MF_GRAYED : 0;menu.InsertMenu(2, MF_BYPOSITION | flags, WM_CUT,MES_CUT);menu.InsertMenu(4, MF_BYPOSITION | flags, WM_CLEAR,MES_DELETE);f

7、lags = IsClipboardFormatAvailable(CF_TEXT) &&!bReadOnly ? 0 : MF_GRAYED;menu.InsertMenu(4, MF_BYPOSITION | flags, WM_PASTE,MES_PASTE);menu.InsertMenu(6, MF_BYPOSITION | MF_SEPARATOR);int len = GetWindowTextLength();flags = (!len | (LOWORD(sel) = 0 && HIWORD(sel) =len) ? MF_GRAYED : 0

8、;menu.InsertMenu(7, MF_BYPOSITION | flags, ME_SELECTALL,MES_SELECTALL);menu.TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON |TPM_RIGHTBUTTON, point.x, point.y, this);BOOL CMenuEdit:OnCommand(WPARAM wParam, LPARAM lParam)switch (LOWORD(wParam)case EM_UNDO:case WM_CUT:case WM_COPY:case WM_CLEAR:case WM_PASTE:return Sen