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- /*-------------------------------------------------
- CHECKER1.C -- Mouse Hit-Test Demo Program No. 1
- (c) Charles Petzold, 1998
- -------------------------------------------------*/
-
- #include <windows.h>
-
- #define DIVISIONS 5
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT ("Checker1") ;
- 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 ("Checker1 Mouse Hit-Test Demo"),
- 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 BOOL fState[DIVISIONS][DIVISIONS] ;
- static int cxBlock, cyBlock ;
- HDC hdc ;
- int x, y ;
- PAINTSTRUCT ps ;
- RECT rect ;
-
- switch (message)
- {
- case WM_SIZE :
- cxBlock = LOWORD (lParam) / DIVISIONS ;
- cyBlock = HIWORD (lParam) / DIVISIONS ;
- return 0 ;
-
- case WM_LBUTTONDOWN :
- x = LOWORD (lParam) / cxBlock ;
- y = HIWORD (lParam) / cyBlock ;
-
- if (x < DIVISIONS && y < DIVISIONS)
- {
- fState [x][y] ^= 1 ;
-
- rect.left = x * cxBlock ;
- rect.top = y * cyBlock ;
- rect.right = (x + 1) * cxBlock ;
- rect.bottom = (y + 1) * cyBlock ;
-
- InvalidateRect (hwnd, &rect, FALSE) ;
- }
- else
- MessageBeep (0) ;
- return 0 ;
-
- case WM_PAINT :
- hdc = BeginPaint (hwnd, &ps) ;
-
- for (x = 0 ; x < DIVISIONS ; x++)
- for (y = 0 ; y < DIVISIONS ; y++)
- {
- Rectangle (hdc, x * cxBlock, y * cyBlock,
- (x + 1) * cxBlock, (y + 1) * cyBlock) ;
-
- if (fState [x][y])
- {
- MoveToEx (hdc, x * cxBlock, y * cyBlock, NULL) ;
- LineTo (hdc, (x+1) * cxBlock, (y+1) * cyBlock) ;
- MoveToEx (hdc, x * cxBlock, (y+1) * cyBlock, NULL) ;
- LineTo (hdc, (x+1) * cxBlock, y * cyBlock) ;
- }
- }
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY :
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-