C语言大作业(图形)
/*----------------------------------------
ENDJOIN.C -- Ends and Joins Demo
(c) Charles Petzold, 1996
----------------------------------------*/
#include
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static char szAppName[] = "EndJoin" ;
HWND hwnd ;
MSG msg ;
WNDCLASSEX wndclass ;
wndclass.cbSize = sizeof (WNDCLASSEX) ;
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 ;
wndclass.hIconSm = LoadIcon (NULL, IDI_APPLICATION) ;
RegisterClassEx (&wndclass) ;
hwnd = CreateWindow (szAppName, "Ends and Joins 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 iMsg, WPARAM wParam, LPARAM lParam)
{
static int iEnd [] = { PS_ENDCAP_ROUND, PS_ENDCAP_SQUARE,
PS_ENDCAP_FLAT } ;
static int iJoin [] = { PS_JOIN_ROUND, PS_JOIN_BEVEL,
PS_JOIN_MITER } ;
static int cxClient, cyClient ;
HDC hdc ;
int i ;
LOGBRUSH lb ;
PAINTSTRUCT ps ;
switch (iMsg)
{
case WM_SIZE:
cxClient = LOWORD (lParam) ;
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
SetMapMode (hdc, MM_ANISOTROPIC) ;
SetWindowExtEx (hdc, 100, 100, NULL) ;
SetViewportExtEx (hdc, cxClient, cyClient, NULL) ;
lb.lbStyle = BS_SOLID ;
lb.lbColor = RGB (128, 128, 128) ;
lb.lbHatch = 0 ;
for (i = 0 ; i < 3 ; i++)
{
SelectObject (hdc,
ExtCreatePen (PS_SOLID | PS_GEOMETRIC |
iEnd [i] | iJoin [i], 10,
&lb, 0, NULL)) ;
BeginPath (hdc) ;
MoveToEx (hdc, 10 + 30 * i, 25, NULL) ;
LineTo (hdc, 20 + 30 * i, 75) ;
LineTo (hdc, 30 + 30 * i, 25) ;
EndPath (hdc) ;
StrokePath (hdc) ;
DeleteObject (
SelectObject (hdc,
GetStockObject (BLACK_PEN))) ;
MoveToEx (hdc, 10 + 30 * i, 25, NULL) ;
LineTo (hdc, 20 + 30 * i, 75) ;
LineTo (hdc, 30 + 30 * i, 25) ;
}
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DESTROY:
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
}
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