19. 多重文件界面.txt

本书介绍了在Microsoft Windows 98、Microsoft Windows NT 4.0和Windows NT 5.0下程序写作的方法

        
        
                                         // Save some window handles
        
        
        
                          hwndClient = GetParent (hwnd) ;
        
                          hwndFrame  = GetParent (hwndClient) ;
        
                          return 0 ;
        
        
        
           case   WM_COMMAND:
        
                          switch (LOWORD (wParam))
        
                          {
        
                                  case IDM_COLOR_BLACK:
        
                                  case IDM_COLOR_RED:
        
                                  case IDM_COLOR_GREEN:
        
                                  case IDM_COLOR_BLUE:
        
                                  case IDM_COLOR_WHITE:
        
                   // Change the text color
        
             
        
              pHelloData = (PHELLODATA) GetWindowLong (hwnd, 0) ;
        
             
        
              hMenu = GetMenu (hwndFrame) ;
        
             
        
              CheckMenuItem (hMenu, pHelloData->iColor, MF_UNCHECKED) ;
        
             pHelloData->iColor = wParam ;
        
              CheckMenuItem (hMenu, pHelloData->iColor, MF_CHECKED) ;
        
             
        
              pHelloData->clrText = clrTextArray[wParam - IDM_COLOR_BLACK] ;
        
             
        
              InvalidateRect (hwnd, NULL, FALSE) ;
        
             }
        
            return 0 ;
        
        
        
           case   WM_PAINT:
        
                  // Paint the window
        
             
        
                          hdc = BeginPaint (hwnd, &ps) ;
        
             
        
                          pHelloData = (PHELLODATA) GetWindowLong (hwnd, 0) ;
        
                          SetTextColor (hdc, pHelloData->clrText) ;
        
             
        
                          GetClientRect (hwnd, &rect) ;
        
             
        
                          DrawText (hdc, TEXT ("Hello, World!"), -1, &rect,
        
                   DT_SINGLELINE | DT_CENTER | DT_VCENTER) ;
        
                          EndPaint (hwnd, &ps) ;
        
                          return 0 ;
        
             
        
           case   WM_MDIACTIVATE:
        
                  // Set the Hello menu if gaining focus
        
             
        
                          if (lParam == (LPARAM) hwnd)
        
                 SendMessage (hwndClient, WM_MDISETMENU,(WPARAM)
        
hMenuHello, (LPARAM) hMenuHelloWindow) ;
        
             
        
                                                 // Check or uncheck menu item
        
             
        
                          pHelloData = (PHELLODATA) GetWindowLong (hwnd, 0) ;
        
                         CheckMenuItem (hMenuHello, pHelloData->iColor,
        
                                         (lParam == (LPARAM) hwnd) ? MF_CHECKED : MF_UNCHECKED) ;
        
             
        
                                                 // Set the Init menu if losing focus
        
             
        
                          if (lParam != (LPARAM) hwnd)
        
                                                 SendMessage (hwndClient, WM_MDISETMENU, (WPARAM)
        
hMenuInit,(LPARAM) hMenuInitWindow) ;
        
             
        
                          DrawMenuBar (hwndFrame) ;
        
                          return 0 ;
        

           case   WM_QUERYENDSESSION:
        
           case   WM_CLOSE:
        
       if (IDOK != MessageBox (hwnd, TEXT ("OK to close window?"),
        
                                 TEXT ("Hello"),
        
                   MB_ICONQUESTION | MB_OKCANCEL))
        
                          return 0 ;
        
             
        
                          break ;               // i.e., call DefMDIChildProc
        
             
        
           case   WM_DESTROY:
        
                          pHelloData = (PHELLODATA) GetWindowLong (hwnd, 0) ;
        
                          HeapFree (GetProcessHeap (), 0, pHelloData) ;
        
                          return 0 ;
        
    }
        
                                  // Pass unprocessed message to DefMDIChildProc
        
   
        
           return DefMDIChildProc (hwnd, message, wParam, lParam) ;
        
}
        
LRESULT CALLBACK RectWndProc (     HWND hwnd, UINT message,WPARAM wParam, LPARAM lParam)
        
{
        
           static HWND   hwndClient, hwndFrame ;
        
           HBRUSH        hBrush ;
        
           HDC           hdc ;
        
           PRECTDATA     pRectData ;
        
           PAINTSTRUCT   ps ;
        
           int                                  xLeft, xRight, yTop, yBottom ;
        
           short                                      nRed, nGreen, nBlue ;
        
   
        
           switch (message)
        
    {
        
           case   WM_CREATE:
        
                                         // Allocate memory for window private data
        
        
        
                          pRectData = (PRECTDATA) HeapAlloc (GetProcessHeap (),
        
                              HEAP_ZERO_MEMORY, sizeof (RECTDATA)) ;
        
        
        
                          SetWindowLong (hwnd, 0, (long) pRectData) ;
        
        
        
                                                                        // Start the timer going
        
        
        
                          SetTimer (hwnd, 1, 250, NULL) ;
        
        
        
                                                                        // Save some window handles
        
                          hwndClient    = GetParent (hwnd) ;
        
                         hwndFrame     = GetParent (hwndClient) ;
        
                          return 0 ;
        
        
        
           case   WM_SIZE:    // If not minimized, save the window size
        
        
        
                          if (wParam != SIZE_MINIMIZED)
        
                          {
        
                                                 pRectData = (PRECTDATA) GetWindowLong (hwnd, 0) ;
        
             
        
                                                 pRectData->cxClient = LOWORD (lParam) ;
        
                                                 pRectData->cyClient = HIWORD (lParam) ;
        
                          }
        
        
        
                          break ;                       // WM_SIZE must be processed by DefMDIChildProc
        
        
        
           case   WM_TIMER:                     // Display a random rectangle
        
        
        
                          pRectData     = (PRECTDATA) GetWindowLong (hwnd, 0) ;
        
                          xLeft                        = rand () % pRectData->cxClient ;
        
                          xRight                = rand () % pRectData->cxClient ;
        
                          yTop                         = rand () % pRectData->cyClient ;
        
                          yBottom               = rand () % pRectData->cyClient ;
        
                          nRed                          = rand () & 255 ;
        
                          nGreen                = rand () & 255 ;
        
                          nBlue                         = rand () & 255 ;
        
        
        
                          hdc = GetDC (hwnd) ;
        
                          hBrush = CreateSolidBrush (RGB (nRed, nGreen, nBlue)) ;
        
                          SelectObject (hdc, hBrush) ;
        
        
        
                          Rectangle (hdc, min (xLeft, xRight), min (yTop, yBottom),
        
                                                                       max (xLeft, xRight), max (yTop, yBottom)) ;
        
        
        
                         ReleaseDC (hwnd, hdc) ;
        
                          DeleteObject (hBrush) ;
        
                          return 0 ;
        
        
        
           case   WM_PAINT:                                            // Clear the window
        
        
        
                          InvalidateRect (hwnd, NULL, TRUE) ;
        
                          hdc = BeginPaint (hwnd, &ps) ;
        
                          EndPaint (hwnd, &ps) ;
        
                          return 0 ;
        
        
        
           case   WM_MDIACTIVATE:                      // Set the appropriate menu
        
                          if (lParam == (LPARAM) hwnd)
        
                 SendMessage (hwndClient, WM_MDISETMENU, (WPARAM) hMenuRect, (LPARAM) hMenuRectWindow) ;
        
                          else