LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient ;
static SYSTEMTIME stPrevious ;
BOOL fChange ;
HDC hdc ;
PAINTSTRUCT ps ;
SYSTEMTIME st ;
switch (message)
{
case WM_CREATE :
SetTimer (hwnd, ID_TIMER, 1000, NULL) ;
GetLocalTime (&st) ;
stPrevious = st ;
return 0 ;
case WM_SIZE :
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_TIMER :
GetLocalTime (&st) ;
fChange = st.wHour != stPrevious.wHour ||
st.wMinute != stPrevious.wMinute ;
hdc = GetDC (hwnd) ;
SetIsotropic (hdc, cxClient, cyClient) ;
SelectObject (hdc, GetStockObject (WHITE_PEN)) ;
DrawHands (hdc, &stPrevious, fChange) ;
SelectObject (hdc, GetStockObject (BLACK_PEN)) ;
DrawHands (hdc, &st, TRUE) ;
ReleaseDC (hwnd, hdc) ;
stPrevious = st ;
return 0 ;
case WM_PAINT :
hdc = BeginPaint (hwnd, &ps) ;
SetIsotropic (hdc, cxClient, cyClient) ;
DrawClock (hdc) ;
DrawHands (hdc, &stPrevious, TRUE) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY :
KillTimer (hwnd, ID_TIMER) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
static int cxClient, cyClient;
static SYSTEMTIME stPrevious;
BOOL fChange;
SYSTEMTIME st;
switch (message)
{
case WM_CREATE:
SetTimer(hWnd, ID_TIMER, 1000, NULL);
GetLocalTime(&st);
stPrevious = st;
return 0;
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0;
case WM_TIMER:
GetLocalTime(&st);
fChange = ((st.wHour != stPrevious.wHour) || (st.wMinute != stPrevious.wMinute));
hdc = GetDC(hWnd);
SetIsotropic(hdc, cxClient, cyClient);
SelectObject(hdc, GetStockObject(WHITE_PEN));
DrawHands(hdc, &stPrevious, fChange);
SelectObject(hdc, GetStockObject(BLACK_PEN));
DrawHands(hdc, &st, TRUE);
ReleaseDC(hWnd, hdc);
stPrevious = st;
return 0;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
SetIsotropic(hdc, cxClient, cyClient);
DrawClock(hdc);
DrawHands(hdc, &stPrevious, TRUE);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
KillTimer(hWnd, ID_TIMER);
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
