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- /*-----------------------------------------------
- ALTWIND.C -- Alternate and Winding Fill Modes
- (c) Charles Petzold, 1998
- -----------------------------------------------*/
-
- #include <windows.h>
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT ("AltWind") ;
- 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 (NULL, IDI_APPLICATION) ;
- wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
- wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- if (!RegisterClass (&wndclass))
- {
- MessageBox (NULL, TEXT ("Program requires Windows NT!"),
- szAppName, MB_ICONERROR) ;
- return 0 ;
- }
-
- hwnd = CreateWindow (szAppName, TEXT ("Alternate and Winding Fill Modes"),
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, iCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- static POINT aptFigure [10] = { 10,70, 50,70, 50,10, 90,10, 90,50,
- 30,50, 30,90, 70,90, 70,30, 10,30 };
- static int cxClient, cyClient ;
- HDC hdc ;
- int i ;
- PAINTSTRUCT ps ;
- POINT apt[10] ;
-
- switch (message)
- {
- case WM_SIZE:
- cxClient = LOWORD (lParam) ;
- cyClient = HIWORD (lParam) ;
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- SelectObject (hdc, GetStockObject (GRAY_BRUSH)) ;
-
- for (i = 0 ; i < 10 ; i++)
- {
- apt[i].x = cxClient * aptFigure[i].x / 200 ;
- apt[i].y = cyClient * aptFigure[i].y / 100 ;
- }
-
- SetPolyFillMode (hdc, ALTERNATE) ;
- Polygon (hdc, apt, 10) ;
-
- for (i = 0 ; i < 10 ; i++)
- {
- apt[i].x += cxClient / 2 ;
- }
-
- SetPolyFillMode (hdc, WINDING) ;
- Polygon (hdc, apt, 10) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY:
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-