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C/C++ Source or Header  |  1995-11-25  |  6.8 KB  |  213 lines
  1.  
  2. #include <windows.h>  
  3. #include "combrgn.h"  
  4.  
  5.  
  6. #if defined (WIN32)
  7.     #define IS_WIN32 TRUE
  8. #else
  9.     #define IS_WIN32 FALSE
  10. #endif
  11.  
  12. #define IS_NT      IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
  13. #define IS_WIN32S  IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
  14. #define IS_WIN95   (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
  15.  
  16. HINSTANCE hInst;   // current instance
  17.  
  18. LPCTSTR lpszAppName = "MyApp";
  19. LPCTSTR lpszTitle   = "CombineRgn()"; 
  20.  
  21.  
  22. BOOL RegisterWin95( CONST WNDCLASS* lpwc );
  23.  
  24.  
  25. int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
  26.                       LPTSTR lpCmdLine, int nCmdShow)
  27. {
  28.    MSG      msg;
  29.    HWND     hWnd; 
  30.    WNDCLASS wc;
  31.  
  32.    wc.style         = CS_HREDRAW | CS_VREDRAW;
  33.    wc.lpfnWndProc   = (WNDPROC)WndProc;       
  34.    wc.cbClsExtra    = 0;                      
  35.    wc.cbWndExtra    = 0;                      
  36.    wc.hInstance     = hInstance;              
  37.    wc.hIcon         = LoadIcon (hInstance, lpszAppName); 
  38.    wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  39.    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
  40.    wc.lpszMenuName  = lpszAppName;              
  41.    wc.lpszClassName = lpszAppName;              
  42.  
  43.    if ( IS_WIN95 )
  44.    {
  45.       if ( !RegisterWin95( &wc ) )
  46.          return( FALSE );
  47.    }
  48.    else if ( !RegisterClass( &wc ) )
  49.       return( FALSE );
  50.  
  51.    hInst = hInstance; 
  52.  
  53.    hWnd = CreateWindow( lpszAppName, 
  54.                         lpszTitle,    
  55.                         WS_OVERLAPPEDWINDOW, 
  56.                         CW_USEDEFAULT, 0, 
  57.                         CW_USEDEFAULT, 0,  
  58.                         NULL,              
  59.                         NULL,              
  60.                         hInstance,         
  61.                         NULL               
  62.                       );
  63.  
  64.    if ( !hWnd ) 
  65.       return( FALSE );
  66.  
  67.    ShowWindow( hWnd, nCmdShow ); 
  68.    UpdateWindow( hWnd );         
  69.  
  70.    while( GetMessage( &msg, NULL, 0, 0) )   
  71.    {
  72.       TranslateMessage( &msg ); 
  73.       DispatchMessage( &msg );  
  74.    }
  75.  
  76.    return( msg.wParam ); 
  77. }
  78.  
  79.  
  80. BOOL RegisterWin95( CONST WNDCLASS* lpwc )
  81. {
  82.    WNDCLASSEX wcex;
  83.  
  84.    wcex.style         = lpwc->style;
  85.    wcex.lpfnWndProc   = lpwc->lpfnWndProc;
  86.    wcex.cbClsExtra    = lpwc->cbClsExtra;
  87.    wcex.cbWndExtra    = lpwc->cbWndExtra;
  88.    wcex.hInstance     = lpwc->hInstance;
  89.    wcex.hIcon         = lpwc->hIcon;
  90.    wcex.hCursor       = lpwc->hCursor;
  91.    wcex.hbrBackground = lpwc->hbrBackground;
  92.    wcex.lpszMenuName  = lpwc->lpszMenuName;
  93.    wcex.lpszClassName = lpwc->lpszClassName;
  94.  
  95.    // Added elements for Windows 95.
  96.    //...............................
  97.    wcex.cbSize = sizeof(WNDCLASSEX);
  98.    wcex.hIconSm = LoadIcon(wcex.hInstance, "SMALL");
  99.             
  100.    return RegisterClassEx( &wcex );
  101. }
  102.  
  103.  
  104. LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
  105. {
  106.    switch( uMsg )
  107.    {
  108.       case WM_COMMAND :
  109.               switch( LOWORD( wParam ) )
  110.               {
  111.                  case IDM_TEST :
  112.                         {
  113.                            POINT    ptArray[3];
  114.                            HRGN     Rgn1, Rgn2, Rgn3, Rgn4;
  115.                            LOGBRUSH lb;
  116.                            HBRUSH   hBrush;
  117.                            HDC      hDC = GetDC( hWnd );
  118.  
  119.                            // Create a rectangular region.
  120.                            //.............................
  121.                            Rgn1 = CreateRectRgn( 10, 10, 110, 110 );
  122.  
  123.                            // Create an elliptic region.
  124.                            //...........................
  125.                            Rgn2 = CreateEllipticRgn( 60, 60, 160, 160 );
  126.  
  127.                            // Create a polygonal region consisting of three points.
  128.                            //......................................................
  129.                            ptArray[0].x = 10;  ptArray[0].y = 160;
  130.                            ptArray[1].x = 60;  ptArray[1].y = 60;
  131.                            ptArray[2].x = 110; ptArray[2].y = 160;
  132.                            Rgn3 = CreatePolygonRgn( ptArray, 
  133.                                                     sizeof(ptArray)/sizeof(POINT), ALTERNATE );
  134.  
  135.  
  136.                            // Create a dummy region to combine into.
  137.                            //.......................................
  138.                            Rgn4 = CreateRectRgn( 0, 0, 10, 10 ); 
  139.  
  140.                            // Combine the elliptic and rectangular regions. 
  141.                            //..............................................
  142.                            CombineRgn( Rgn4, Rgn2, Rgn1, RGN_OR );
  143.  
  144.                            // Combine the results with the polygon region.
  145.                            //.............................................
  146.                            CombineRgn( Rgn4, Rgn4, Rgn3, RGN_OR );
  147.  
  148.                            // Now create a hatched brush and draw the resulting region.
  149.                            //..........................................................
  150.                            lb.lbStyle = BS_HATCHED;
  151.                            lb.lbColor = RGB(0, 0, 0);
  152.                            lb.lbHatch = HS_DIAGCROSS;
  153.                            hBrush = CreateBrushIndirect( &lb );
  154.  
  155.                            FillRgn( hDC, Rgn4, hBrush );
  156.  
  157.                            //  Finally, delete all created GDI objects.
  158.                            //..........................................
  159.                            DeleteObject( hBrush );
  160.                            DeleteObject( Rgn1 );
  161.                            DeleteObject( Rgn2 );
  162.                            DeleteObject( Rgn3 );
  163.                            DeleteObject( Rgn4 );
  164.  
  165.                            ReleaseDC( hWnd, hDC );
  166.                         }
  167.                         break;
  168.  
  169.                  case IDM_ABOUT :
  170.                         DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
  171.                         break;
  172.  
  173.                  case IDM_EXIT :
  174.                         DestroyWindow( hWnd );
  175.                         break;
  176.               }
  177.               break;
  178.       
  179.       case WM_DESTROY :
  180.               PostQuitMessage(0);
  181.               break;
  182.  
  183.       default :
  184.             return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
  185.    }
  186.  
  187.    return( 0L );
  188. }
  189.  
  190.  
  191. LRESULT CALLBACK About( HWND hDlg,           
  192.                         UINT message,        
  193.                         WPARAM wParam,       
  194.                         LPARAM lParam)
  195. {
  196.    switch (message) 
  197.    {
  198.        case WM_INITDIALOG: 
  199.                return (TRUE);
  200.  
  201.        case WM_COMMAND:                              
  202.                if (   LOWORD(wParam) == IDOK         
  203.                    || LOWORD(wParam) == IDCANCEL)    
  204.                {
  205.                        EndDialog(hDlg, TRUE);        
  206.                        return (TRUE);
  207.                }
  208.                break;
  209.    }
  210.  
  211.    return (FALSE); 
  212. }
  213.