nslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient ;
HDC hdc ;
PAINTSTRUCT ps ;
switch (message)
{
case WM_SIZE:
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
Rectangle (hdc, cxClient / 8, cyClient / 8,
7 * cxClient / 8, 7 * cyClient / 8) ;
MoveToEx (hdc, 0, 0, NULL) ;
LineTo (hdc, cxClient, cyClient) ;
MoveToEx (hdc, 0, cyClient, NULL) ;
LineTo (hdc, cxClient, 0) ;
Ellipse (hdc, cxClient / 8, cyClient / 8,
7 * cxClient / 8, 7 * cyClient / 8) ;
RoundRect (hdc, cxClient / 4, cyClient / 4,
3 * cxClient / 4, 3 * cyClient / 4,
cxClient / 4, cyClient / 4) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
贝塞尔曲线
「曲尺」这个词从前指的是一片木头、橡皮或者金属，用来在纸上画曲线。比如说，如果您有一些不同图点，您想要在它们之间画一 |