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- /*-------------------------------------------------
- CHECKER3.C -- Mouse Hit-Test Demo Program No. 3
- (c) Charles Petzold, 1990
- -------------------------------------------------*/
-
- #include <windows.h>
- #define DIVISIONS 5
-
- long FAR PASCAL WndProc (HWND, WORD, WORD, LONG) ;
- long FAR PASCAL ChildWndProc (HWND, WORD, WORD, LONG) ;
-
- char szChildClass[] = "Checker3_Child" ;
-
- int PASCAL WinMain (HANDLE hInstance, HANDLE hPrevInstance,
- LPSTR lpszCmdLine, int nCmdShow)
- {
- static char szAppName[] = "Checker3" ;
- HWND hwnd ;
- MSG msg ;
- WNDCLASS wndclass ;
-
- if (!hPrevInstance)
- {
- 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 = GetStockObject (WHITE_BRUSH) ;
- wndclass.lpszMenuName = NULL ;
- wndclass.lpszClassName = szAppName ;
-
- RegisterClass (&wndclass) ;
-
- wndclass.lpfnWndProc = ChildWndProc ;
- wndclass.cbWndExtra = sizeof (WORD) ;
- wndclass.hIcon = NULL ;
- wndclass.lpszClassName = szChildClass ;
-
- RegisterClass (&wndclass) ;
- }
-
- hwnd = CreateWindow (szAppName, "Checker3 Mouse Hit-Test Demo",
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, CW_USEDEFAULT,
- CW_USEDEFAULT, CW_USEDEFAULT,
- NULL, NULL, hInstance, NULL) ;
-
- ShowWindow (hwnd, nCmdShow) ;
- UpdateWindow (hwnd) ;
-
- while (GetMessage (&msg, NULL, 0, 0))
- {
- TranslateMessage (&msg) ;
- DispatchMessage (&msg) ;
- }
- return msg.wParam ;
- }
-
- long FAR PASCAL WndProc (HWND hwnd, WORD message, WORD wParam, LONG lParam)
- {
- static HWND hwndChild [DIVISIONS] [DIVISIONS] ;
- short cxBlock, cyBlock, x, y ;
-
- switch (message)
- {
- case WM_CREATE:
- for (x = 0 ; x < DIVISIONS ; x++)
- for (y = 0 ; y < DIVISIONS ; y++)
- {
- hwndChild [x][y] = CreateWindow (szChildClass, NULL,
- WS_CHILDWINDOW | WS_VISIBLE,
- 0, 0, 0, 0,
- hwnd, y << 8 | x,
- GetWindowWord (hwnd, GWW_HINSTANCE), NULL) ;
- }
- return 0 ;
-
- case WM_SIZE:
- cxBlock = LOWORD (lParam) / DIVISIONS ;
- cyBlock = HIWORD (lParam) / DIVISIONS ;
-
- for (x = 0 ; x < DIVISIONS ; x++)
- for (y = 0 ; y < DIVISIONS ; y++)
- MoveWindow (hwndChild [x][y],
- x * cxBlock, y * cyBlock,
- cxBlock, cyBlock, TRUE) ;
- return 0 ;
-
- case WM_LBUTTONDOWN:
- MessageBeep (0) ;
- return 0 ;
-
- case WM_DESTROY:
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-
- long FAR PASCAL ChildWndProc (HWND hwnd, WORD message, WORD wParam, LONG lParam)
- {
- HDC hdc ;
- PAINTSTRUCT ps ;
- RECT rect ;
-
- switch (message)
- {
- case WM_CREATE:
- SetWindowWord (hwnd, 0, 0) ; // on/off flag
- return 0 ;
-
- case WM_LBUTTONDOWN:
- SetWindowWord (hwnd, 0, 1 ^ GetWindowWord (hwnd, 0)) ;
- InvalidateRect (hwnd, NULL, FALSE) ;
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- GetClientRect (hwnd, &rect) ;
- Rectangle (hdc, 0, 0, rect.right, rect.bottom) ;
-
- if (GetWindowWord (hwnd, 0))
- {
- MoveTo (hdc, 0, 0) ;
- LineTo (hdc, rect.right, rect.bottom) ;
- MoveTo (hdc, 0, rect.bottom) ;
- LineTo (hdc, rect.right, 0) ;
- }
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-