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。
