TnbOnlyWindowChecker.h

[詳解]

#pragma once
#include "TnbStr.h"
#include "TnbSync.h"
 
 
 
//TNB Library
namespace TNB
{
 
 
 
class COnlyWindowChecker : public CCopyImpossible
{
public:
    
    ~COnlyWindowChecker(void)
    {
        m_DeleteMutex();
    }
 
    COnlyWindowChecker(LPCTSTR lpszUniquelyText) : m_uniquelyText(lpszUniquelyText), m_pMutex(NULL)
    {
    }
 
    bool IsOnly(HWND hWnd)
    {
        if ( hWnd == NULL || ! ::IsWindow(hWnd) || m_uniquelyText.IsEmpty() )
        {
            ASSERT0( false, "COnlyWindowChecker::IsOnly()", "パラメータの設定が不正です。" );
            throw CInvalidParamException();
        }
        m_DeleteMutex();
        m_pMutex = new CSyncMutex(true, m_uniquelyText + _T("_mx"));
        if ( ! m_pMutex->Lock(0) )
        {
            // 誰か使っている
            m_hWnd = hWnd;
            ::EnumWindows(ms_EnumFunc, reinterpret_cast<LPARAM>(this));
            return true;
        }
        // 初めて
        VERIFY( ::SetProp(hWnd, m_uniquelyText, reinterpret_cast<HANDLE>(TRUE)) );
        return false;
    }
 
protected:
 
    virtual void OnFound(HWND hWnd)
    {
        if ( ::IsWindowVisible(hWnd) )
        {
            ::ShowWindow(hWnd, SW_SHOWNORMAL);
            ::SetForegroundWindow(hWnd);
            FLASHWINFO fi = { sizeof(FLASHWINFO) };
            fi.hwnd = hWnd;
            fi.dwFlags = FLASHW_ALL;
            fi.uCount = 3;
            fi.dwTimeout = 1000 / (3 * 2);
            ::FlashWindowEx(&fi);
        }
    }
 
private:
    void m_DeleteMutex(void)
    {
        if ( m_pMutex != NULL )
        {
            delete m_pMutex;
            m_pMutex = NULL;
        }
    }
    BOOL m_EnumFunc(HWND hWnd)
    {
        if ( m_hWnd != hWnd )
        {
            HANDLE h = ::GetProp(hWnd, m_uniquelyText);
            if ( h != NULL )
            {
                OnFound(hWnd);
                return FALSE; // enum終わり
            }
        }
        return TRUE;
    }
    static BOOL CALLBACK ms_EnumFunc(HWND hWnd, LPARAM lParam)
    {
        COnlyWindowChecker* P = reinterpret_cast<COnlyWindowChecker*>(lParam);
        return P->m_EnumFunc(hWnd);
    }
 
    CSyncMutex*     m_pMutex;           
    CStr            m_uniquelyText;     
    HWND            m_hWnd;             
};
 
 
 
};//TNB