C++技巧之三

代码清单1window_update_scope的节略本

/*/////////////////////////////////////////////////////////////

*

*...

*

*Extractfromwinstl_window_update_scope.h

*摘录自winstl_window_update_scope.h

*

*www:
'target='_blank'>http://www.synesis.com.au/winstl
*
'target='_blank'>http://www.winstl.org/
*
*Copyright(C)2002,SynesisSoftwarePtyLtd.
*版权所有(C)2002,SynesisSoftwarePtyLtd.公司
*(LicensedundertheSynesisSoftwareStandardSourceLicense:
*http://www.synesis.com.au/licenses/ssssl.html)
*(由SynesisSoftwareStandardSourceLicense授权许可:
*http://www.synesis.com.au/licenses/ssssl.html)
*
*...
*
*//////////////////////////////////////////////////////////*/
...
namespacewinstl
{
classwindow_update_scope
{
//Construction
//构造
public:
//TakesaHWNDandchangesit'scurrentupdate-status,)
//whichissetbacktotheoriginalstateinthe
//destructor.
//取得HWND句柄并改变其当前更新状态，在析构器中设置其回到初始状态。
ws_explicit_kwindow_update_scope(HWNDhwnd)
:m_bIsLocked(hwnd!=NULL&&::LockWindowUpdate(hwnd))
{}
~window_update_scope()winstl_throw_0()
{
if(m_bIsLocked)
{
//Lockwassuccessful,soundohere
//锁定成功，因此此处反向操作
::LockWindowUpdate(NULL);
}
}
//Members
//成员变量
protected:
ws_bool_tm_bIsLocked;
//Nottobeimplemented
//不被实现
private:
window_update_scope(window_update_scopeconst&rhs);
window_update_scopeconst
&operator=(window_update_scopeconst&rhs);
};
}//namespacewinstl
//名称空间winstl