Programming Windows程式开发设计指南->第五章 例子程序4

/*_############################################################################
  _##
  _##  Programming Windows程式开发设计指南->第五章 例子程序4
  _##  Author: xwlee                        
  _##  Time: 2007.06.19 
  _##  Chang'an University
  _##  Development condition: win2003 Server+VC6.0
  _##
  _##  程序5-4  ALTWIND
  _##  ALTWIND.C 文件
  _##  内部区域的图形
  _##  程序只是进行验证
  _## 
  _##
  _##    ALTWIND.C --      Alternate and Winding Fill Modes
  _##     (c) Charles Petzold, 1998
  _##  
  _##########################################################################*/

#include <windows.h>

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (  HINSTANCE hInstance, HINSTANCE hPrevInstance,

                                       PSTR szCmdLine, int iCmdShow)

{

       static TCHAR szAppName[] = TEXT ("AltWind") ;

       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 ("Alternate and Winding Fill Modes"),

                            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 aptFigure [10] = {10,70, 50,70, 50,10, 90,10, 90,50,

                                 30,50, 30,90, 70,90, 70,30, 10,30 };

       static int  cxClient, cyClient ;

       HDC              hdc ;

       int           i ;

       PAINTSTRUCT     ps ;

       POINT          apt[10] ;

    

       switch (message)

       {

       case WM_SIZE:

              cxClient = LOWORD (lParam) ;

             cyClient = HIWORD (lParam) ;

             return 0 ;

 

       case WM_PAINT:

              hdc = BeginPaint (hwnd, &ps) ;

 

              SelectObject (hdc, GetStockObject (GRAY_BRUSH)) ;

 

              for (i = 0 ; i < 10 ; i++)

              {

                     apt[i].x = cxClient * aptFigure[i].x / 200 ;

                     apt[i].y = cyClient * aptFigure[i].y / 100 ;

              }

 

              SetPolyFillMode (hdc, ALTERNATE) ;

              Polygon (hdc, apt, 10) ;

 

              for (i = 0 ; i < 10 ; i++)

              {

                     apt[i].x += cxClient / 2 ;

              }

 

              SetPolyFillMode (hdc, WINDING) ;

              Polygon (hdc, apt, 10) ;

         

              EndPaint (hwnd, &ps) ;

              return 0 ;

         

       case WM_DESTROY:

              PostQuitMessage (0) ;

              return 0 ;

       }

       return DefWindowProc (hwnd, message, wParam, lParam) ;

}