Programming Windows程式开发设计指南->第九章 例子程序1

/*_############################################################################
  _##
  _##  Programming Windows程式开发设计指南->第九章 例子程序1
  _##  Author: xwlee                        
  _##  Time: 2007.07.03
  _##  Chang'an University
  _##  Development condition: win2003 Server+VC6.0
  _##
  _##  程序9-1  BTNLOOK
  _##  BTNLOOK.C 文件
  _##  BTNLOOK建立10个子窗口按钮控件，每个控件对应一个标准的按钮样式，因此共有10种标准按钮样式。
  _## 
  _## 
  _##
  _##      BTNLOOK.C --     Button Look Program
  _##     (c) Charles Petzold, 1998
  _##  
  _##########################################################################*/
#include <windows.h>

struct
{
          int                       iStyle ;
          TCHAR *             szText ;
}
button[] =
{
          BS_PUSHBUTTON,          TEXT ("PUSHBUTTON"),
          BS_DEFPUSHBUTTON,    TEXT ("DEFPUSHBUTTON"),
          BS_CHECKBOX,            TEXT ("CHECKBOX"),
          BS_AUTOCHECKBOX,         TEXT ("AUTOCHECKBOX"),
          BS_RADIOBUTTON,        TEXT ("RADIOBUTTON"),
          BS_3STATE,                 TEXT ("3STATE"),
          BS_AUTO3STATE,           TEXT ("AUTO3STATE"),
          BS_GROUPBOX,            TEXT ("GROUPBOX"),
          BS_AUTORADIOBUTTON,      TEXT ("AUTORADIO"),
          BS_OWNERDRAW,            TEXT ("OWNERDRAW")
} ;

#define NUM (sizeof button / sizeof button[0])
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                                                              PSTR szCmdLine, int iCmdShow)
{
          static TCHAR        szAppName[] = TEXT ("BtnLook") ;
          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 ("This program requires Windows NT!"),
                                                                    szAppName, MB_ICONERROR) ;
                     return 0 ;
          }
    
          hwnd = CreateWindow (       szAppName, TEXT ("Button Look"),
                                     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 HWND               hwndButton[NUM] ;
          static RECT          rect ;
          static TCHAR               szTop[]          = TEXT ("message   wParam  lParam"),
                                          szUnd[]          = TEXT ("_______   ______  ______"),
                                          szFormat[]     = TEXT ("%-16s%04X-%04X   %04X-%04X"),
                                         szBuffer[50] ;
          static int  cxChar, cyChar ;
          HDC                                   hdc ;
          PAINTSTRUCT          ps ;
       int                                      i ;
    
          switch (message)
          {
          case       WM_CREATE :
                     cxChar = LOWORD (GetDialogBaseUnits ()) ;
                     cyChar = HIWORD (GetDialogBaseUnits ()) ; // 用的是GetDialogBaseUnits函数来获得默认字体字符的宽度和高度
         
                     for (i = 0 ; i < NUM ; i++)
                     hwndButton[i] =     CreateWindow ( TEXT("button"),button[i].szText,
                                         WS_CHILD | WS_VISIBLE | button[i].iStyle,
                                         cxChar, cyChar * (1 + 2 * i),
                                         20 * cxChar, 7 * cyChar / 4,hwnd, (HMENU) i,
                                         ((LPCREATESTRUCT) lParam)->hInstance, NULL) ;

                     return 0 ;

         case       WM_SIZE :
                     rect.left               = 24 * cxChar ;
                     rect.top              =  2 * cyChar ;
                     rect.right              = LOWORD (lParam) ;
                     rect.bottom           = HIWORD (lParam) ;
                     return 0 ;
          case       WM_PAINT :
                     InvalidateRect (hwnd, &rect, TRUE) ;
         
                     hdc = BeginPaint (hwnd, &ps) ;
                     SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
                     SetBkMode (hdc, TRANSPARENT) ;
         
                     TextOut (hdc, 24 * cxChar, cyChar, szTop, lstrlen (szTop)) ;
                     TextOut (hdc, 24 * cxChar, cyChar, szUnd, lstrlen (szUnd)) ;
         
                     EndPaint (hwnd, &ps) ;
                     return 0 ;
         
          case       WM_DRAWITEM :
        
    case       WM_COMMAND :
                 
            ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
         
                     hdc = GetDC (hwnd) ;
                     SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
         
                     TextOut( hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
                                                 szBuffer,
                                                 wsprintf (szBuffer, szFormat,
                                                          message == WM_DRAWITEM ?        TEXT ("WM_DRAWITEM") :
                                            TEXT ("WM_COMMAND"),
                                                          HIWORD (wParam), LOWORD (wParam),
                                                          HIWORD (lParam), LOWORD (lParam))) ;
         
                     ReleaseDC (hwnd, hdc) ;
                     ValidateRect (hwnd, &rect) ;
                     break ;
         

          case       WM_DESTROY :
                     PostQuitMessage (0) ;
                     return 0 ;
     }
          return DefWindowProc (hwnd, message, wParam, lParam) ;
}