C++技巧之四

代碼清單2 window_redraw_scope的節略本

*摘錄自winstl_window_redraw_scope.h * * www:        http://www.synesis.com.au/winstl *             http://www.winstl.org/ * * Copyright (C) 2002, Synesis Software Pty Ltd. *版權所有(C) 2002, Synesis Software Pty Ltd公司 * (Licensed under the Synesis Software Standard Source License: *  )
* (由Synesis Software Standard Source License授權許可: *  ) * * ... * * ////////////////////////////////////////////////////////// */ ...  namespace winstl{     class window_redraw_scope    {
// Construction 
// 構造    public:        // Takes a HWND and changes it´s current redraw-status,        // which is set back to the original state in the         // destructor.        //取得HWND 句柄并改變其當前重畫狀態，在析構器中設置其回到初始狀態。        ws_explicit_k window_redraw_scope(HWND hwnd,                         ws_bool_t bInvalidateOnUnlock = true)            : m_hwnd(hwnd)            , m_bInvalidateOnUnlock(bInvalidateOnUnlock)        {            ::SendMessage(m_hwnd, WM_SETREDRAW, false, 0L);        }         ~window_redraw_scope() winstl_throw_0()        {            ::SendMessage(m_hwnd, WM_SETREDRAW, true, 0L);             if(m_bInvalidateOnUnlock)            {                ::InvalidateRect(m_hwnd, NULL, true);            }        } 
// Members 
// 成員變量    protected:        HWND        m_hwnd;        ws_bool_t   m_bInvalidateOnUnlock; 
// Not to be implemented
// 不被實現    private:        window_redraw_scope(window_redraw_scope const &rhs);        window_redraw_scope const             &operator =(window_redraw_scope const &rhs);    }; } // namespace winstl 名稱空間
 
圖表 1 Window作用域(scope)例子


 


           
原文轉自：http://www.anti-gravitydesign.com