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- /*--------------------------------------------------
- CONNECT.C -- Connect-the-Dots Mouse Demo Program
- (c) Charles Petzold, 1998
- --------------------------------------------------*/
-
- #include <windows.h>
-
- #define MAXPOINTS 1000
-
- LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
-
- int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
- PSTR szCmdLine, int iCmdShow)
- {
- static TCHAR szAppName[] = TEXT ("Connect") ;
- 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 ("Connect-the-Points Mouse 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 POINT pt[MAXPOINTS] ;
- static int iCount ;
- HDC hdc ;
- int i, j ;
- PAINTSTRUCT ps ;
-
- switch (message)
- {
- case WM_LBUTTONDOWN:
- iCount = 0 ;
- InvalidateRect (hwnd, NULL, TRUE) ;
- return 0 ;
-
- case WM_MOUSEMOVE:
- if (wParam & MK_LBUTTON && iCount < 1000)
- {
- pt[iCount ].x = LOWORD (lParam) ;
- pt[iCount++].y = HIWORD (lParam) ;
-
- hdc = GetDC (hwnd) ;
- SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;
- ReleaseDC (hwnd, hdc) ;
- }
- return 0 ;
-
- case WM_LBUTTONUP:
- InvalidateRect (hwnd, NULL, FALSE) ;
- return 0 ;
-
- case WM_PAINT:
- hdc = BeginPaint (hwnd, &ps) ;
-
- SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
- ShowCursor (TRUE) ;
-
- for (i = 0 ; i < iCount - 1 ; i++)
- for (j = i + 1 ; j < iCount ; j++)
- {
- MoveToEx (hdc, pt[i].x, pt[i].y, NULL) ;
- LineTo (hdc, pt[j].x, pt[j].y) ;
- }
-
- ShowCursor (FALSE) ;
- SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
-
- EndPaint (hwnd, &ps) ;
- return 0 ;
-
- case WM_DESTROY:
- PostQuitMessage (0) ;
- return 0 ;
- }
- return DefWindowProc (hwnd, message, wParam, lParam) ;
- }
-