三、Windows键盘快捷键—菜单与快捷键应用程序POPPAD
在第九章,我们建立了一个叫做POPPAD1的程序,它使用了子窗口编辑控件来实作基本的笔记本功能。在这一章中,我们将加入「File」和「Edit」菜单,并称此程序为POPPAD2。「Edit」菜单的菜单项的功能全部可用;我们将在第十一章中完成「File」功能,在 第十三章中完成「Print」功能。POPPAD2如程序10-9所示。
程序10-9 POPPAD2
POPPAD2.C /*--------------------------------------------------------------------------- POPPAD2.C -- Popup Editor Version 2 (includes menu) (c) Charles Petzold, 1998 ---------------------------------------------------------------------------*/ #include <windows.h> #include "resource.h" #define ID_EDIT 1 LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); TCHAR szAppName[] = TEXT ("PopPad2") ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { HACCEL hAccel ; HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (hInstance, szAppName) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ; wndclass.lpszMenuName = szAppName ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox ( NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, szAppName, WS_OVERLAPPEDWINDOW, GetSystemMetrics (SM_CXSCREEN) / 4, GetSystemMetrics (SM_CYSCREEN) / 4, GetSystemMetrics (SM_CXSCREEN) / 2, GetSystemMetrics (SM_CYSCREEN) / 2, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; hAccel = LoadAccelerators (hInstance, szAppName) ; while (GetMessage (&msg, NULL, 0, 0)) { if (!TranslateAccelerator (hwnd, hAccel, &msg)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } } return msg.wParam ; } AskConfirmation (HWND hwnd) { return MessageBox ( hwnd, TEXT ("Really want to close PopPad2?"), szAppName, MB_YESNO | MB_ICONQUESTION) ; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam) { static HWND hwndEdit ; int iSelect, iEnable ; switch (message) { case WM_CREATE: hwndEdit = CreateWindow (TEXT ("edit"), NULL, WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL | WS_BORDER | ES_LEFT | ES_MULTILINE | ES_AUTOHSCROLL | ES_AUTOVSCROLL, 0, 0, 0, 0, hwnd, (HMENU) ID_EDIT, ((LPCREATESTRUCT) lParam)->hInstance, NULL) ; return 0 ; case WM_SETFOCUS: SetFocus (hwndEdit) ; return 0 ; case WM_SIZE: MoveWindow (hwndEdit, 0, 0, LOWORD (lParam), HIWORD (lParam), TRUE) ; return 0 ; case WM_INITMENUPOPUP: if (lParam == 1) { EnableMenuItem ((HMENU) wParam, IDM_EDIT_UNDO, SendMessage (hwndEdit, EM_CANUNDO, 0, 0) ? MF_ENABLED : MF_GRAYED) ; EnableMenuItem ((HMENU) wParam, IDM_EDIT_PASTE, IsClipboardFormatAvailable (CF_TEXT) ? MF_ENABLED : MF_GRAYED) ; iSelect = SendMessage (hwndEdit, EM_GETSEL, 0, 0) ; if (HIWORD (iSelect) == LOWORD (iSelect)) iEnable = MF_GRAYED ; else iEnable = MF_ENABLED ; EnableMenuItem ((HMENU) wParam, IDM_EDIT_CUT, iEnable) ; EnableMenuItem ((HMENU) wParam, IDM_EDIT_COPY, iEnable) ; EnableMenuItem ((HMENU) wParam, IDM_EDIT_CLEAR, iEnable) ; return 0 ; } break ; case WM_COMMAND: if (lParam) { if (LOWORD (lParam) == ID_EDIT && (HIWORD (wParam) == EN_ERRSPACE || HIWORD (wParam) == EN_MAXTEXT)) MessageBox (hwnd, TEXT ("Edit control out of space."), szAppName, MB_OK | MB_ICONSTOP) ; return 0 ; } else switch (LOWORD (wParam)) { case IDM_FILE_NEW: case IDM_FILE_OPEN: case IDM_FILE_SAVE: case IDM_FILE_SAVE_AS: case IDM_FILE_PRINT: MessageBeep (0) ; return 0 ; case IDM_APP_EXIT: SendMessage (hwnd, WM_CLOSE, 0, 0) ; return 0 ; case IDM_EDIT_UNDO: SendMessage (hwndEdit, WM_UNDO, 0, 0) ; return 0 ; case IDM_EDIT_CUT: SendMessage (hwndEdit, WM_CUT, 0, 0) ; return 0 ; case IDM_EDIT_COPY: SendMessage (hwndEdit, WM_COPY, 0, 0) ; return 0 ; case IDM_EDIT_PASTE: SendMessage (hwndEdit, WM_PASTE, 0, 0) ; return 0 ; case IDM_EDIT_CLEAR: SendMessage (hwndEdit, WM_CLEAR, 0, 0) ; return 0 ; case IDM_EDIT_SELECT_ALL: SendMessage (hwndEdit, EM_SETSEL, 0, -1) ; return 0 ; case IDM_HELP_HELP: MessageBox (hwnd, TEXT ("Help not yet implemented!"), szAppName, MB_OK | MB_ICONEXCLAMATION) ; return 0 ; case IDM_APP_ABOUT: MessageBox (hwnd, TEXT ("POPPAD2 (c) Charles Petzold, 1998"), szAppName, MB_OK | MB_ICONINFORMATION) ; return 0 ; } break ; case WM_CLOSE: if (IDYES == AskConfirmation (hwnd)) DestroyWindow (hwnd) ; return 0 ; case WM_QUERYENDSESSION: if (IDYES == AskConfirmation (hwnd)) return 1 ; else return 0 ; case WM_DESTROY: PostQuitMessage (0) ; return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; }
POPPAD2.RC (摘录)
//Microsoft Developer Studio generated resource script. #include "resource.h" #include "afxres.h" ///////////////////////////////////////////////////////////////////////////// // Icon POPPAD2 ICON DISCARDABLE "poppad2.ico" ///////////////////////////////////////////////////////////////////////////// // Menu POPPAD2 MENU DISCARDABLE BEGIN POPUP "&File" BEGIN MENUITEM "&New", IDM_FILE_NEW MENUITEM "&Open...", IDM_FILE_OPEN MENUITEM "&Save", IDM_FILE_SAVE MENUITEM "Save &As...", IDM_FILE_SAVE_AS MENUITEM SEPARATOR MENUITEM "&Print", IDM_FILE_PRINT MENUITEM SEPARATOR MENUITEM "E&xit", IDM_APP_EXIT END POPUP "&Edit" BEGIN MENUITEM "&Undo\tCtrl+Z", IDM_EDIT_UNDO MENUITEM SEPARATOR MENUITEM "Cu&t\tCtrl+X", IDM_EDIT_CUT MENUITEM "&Copy\tCtrl+C", IDM_EDIT_COPY MENUITEM "&Paste\tCtrl+V", IDM_EDIT_PASTE MENUITEM "De&lete\tDel", IDM_EDIT_CLEAR MENUITEM SEPARATOR MENUITEM "&Select All", IDM_EDIT_SELECT_ALL END POPUP "&Help" BEGIN MENUITEM "&Help...", IDM_HELP_HELP MENUITEM "&About PopPad2...", IDM_APP_ABOUT END END ///////////////////////////////////////////////////////////////////////////// // Accelerator POPPAD2 ACCELERATORS DISCARDABLE BEGIN VK_BACK, IDM_EDIT_UNDO, VIRTKEY, ALT, NOINVERT VK_DELETE, IDM_EDIT_CLEAR, VIRTKEY, NOINVERT VK_DELETE, IDM_EDIT_CUT, VIRTKEY, SHIFT, NOINVERT VK_F1, IDM_HELP_HELP, VIRTKEY, NOINVERT VK_INSERT, IDM_EDIT_COPY, VIRTKEY, CONTROL, NOINVERT VK_INSERT, IDM_EDIT_PASTE, VIRTKEY, SHIFT, NOINVERT "^C", IDM_EDIT_COPY, ASCII, NOINVERT "^V", IDM_EDIT_PASTE, ASCII, NOINVERT "^X", IDM_EDIT_CUT, ASCII, NOINVERT "^Z", IDM_EDIT_UNDO, ASCII, NOINVERT END
RESOURCE.H (摘录)
// Microsoft Developer Studio generated include file. // Used by POPPAD2.RC #define IDM_FILE_NEW 40001 #define IDM_FILE_OPEN 40002 #define IDM_FILE_SAVE 40003 #define IDM_FILE_SAVE_AS 40004 #define IDM_FILE_PRINT 40005 #define IDM_APP_EXIT 40006 #define IDM_EDIT_UNDO 40007 #define IDM_EDIT_CUT 40008 #define IDM_EDIT_COPY 40009 #define IDM_EDIT_PASTE 40010 #define IDM_EDIT_CLEAR 40011 #define IDM_EDIT_SELECT_ALL 40012 #define IDM_HELP_HELP 40013 #define IDM_APP_ABOUT 40014
POPPAD2.ICO |
POPPAD2.RC资源描述文件包含菜单和快捷键。您将注意到,所有快捷键都表示在制表符(\t)后的「Edit」弹出式菜单的字符串中。