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- /* Checker2.C - Mouse Hit Program with keyboard interface
- Petzold
- */
-
- #include <windows.h>
-
- #define DIVISIONS 5
-
- long FAR PASCAL WndProc (HWND, WORD, WORD, LONG);
-
- int PASCAL WinMain (HANDLE hInstance,
- HANDLE hPrevInstance,
- LPSTR lpszCmdParam,
- int nCmdShow)
-
- {
- static char szAppName[] = "Checker2";
- 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);
- }
-
- hwnd = CreateWindow (szAppName,
- "Checker2 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 BOOL fState[DIVISIONS][DIVISIONS];
- static short cxBlock, cyBlock;
- HDC hdc;
- PAINTSTRUCT ps;
- RECT rect;
- short x, y;
- char szBuffer[80];
- POINT point;
-
- switch (message)
- {
- case WM_SIZE:
- cxBlock = LOWORD (lParam) / DIVISIONS;
- cyBlock = HIWORD (lParam) / DIVISIONS;
- return 0;
-
- case WM_SETFOCUS:
- ShowCursor (TRUE);
- return 0;
-
- case WM_KILLFOCUS:
- ShowCursor (FALSE);
- return 0;
-
- case WM_KEYDOWN:
- GetCursorPos (&point);
- ScreenToClient (hwnd, &point);
-
- x = max (0, min (DIVISIONS -1, point.x / cxBlock));
- y = max (0, min (DIVISIONS -1, point.y / cyBlock));
-
- switch (wParam)
- {
- case VK_UP:
- y--;
- break;
-
- case VK_DOWN:
- y++;
- break;
-
- case VK_LEFT:
- x--;
- break;
-
- case VK_RIGHT:
- x++;
- break;
-
- case VK_HOME:
- x = 0;
- y = 0;
- break;
-
- case VK_END:
- x = DIVISIONS - 1;
- y = DIVISIONS - 1;
- break;
-
- case VK_RETURN:
- case VK_SPACE:
- SendMessage (hwnd, WM_LBUTTONDOWN, MK_LBUTTON,
- MAKELONG (x * cxBlock, y * cyBlock));
- break;
- }
- x = (x + DIVISIONS) % DIVISIONS;
- y = (y + DIVISIONS) % DIVISIONS;
-
- point.x = x * cxBlock + cxBlock / 2;
- point.y = y * cyBlock + cyBlock / 2;
-
- ClientToScreen (hwnd, &point);
- SetCursorPos (point.x,point.y);
- return 0;
-
-
- case WM_LBUTTONDOWN:
- x = LOWORD (lParam) / cxBlock;
- y = HIWORD (lParam) / cyBlock;
-
-
- /* wsprintf(szBuffer, "cxBlock = %d cyBlock = %d",cxBlock,cyBlock);
- MessageBox (hwnd, szBuffer, "Block Size", MB_ICONINFORMATION | MB_OK);
-
- wsprintf(szBuffer, "X = %d Y = %d",x,y);
-
- MessageBox (hwnd, szBuffer, "X Y - Size", MB_ICONINFORMATION | MB_OK);
-
- */
-
- 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])
- {
- MoveTo (hdc, x * cxBlock, y * cyBlock);
- LineTo (hdc, (x + 1) * cxBlock, (y + 1) * cyBlock);
- MoveTo (hdc, x * cxBlock, (y + 1) * cyBlock);
- 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);
- }
-
-