systemtray.cpp

LibraryManageDM.rar 数据库设计图书馆管理系统

// Returns:
//  TRUE if successful, FALSE if not.
//
//////////////////////////////////////////////////////////////////////////
// Added by Michael Dunn, November 1999
//////////////////////////////////////////////////////////////////////////

BOOL CSystemTray::ShowBalloon(LPCTSTR szText,
                              LPCTSTR szTitle  /*=NULL*/,
                              DWORD   dwIcon   /*=NIIF_NONE*/,
                              UINT    uTimeout /*=10*/ )
{
#ifndef SYSTEMTRAY_USEW2K
    return FALSE;
#else
    // Bail out if we're not on Win 2K.
    if (!m_bWin2K)
        return FALSE;

    // Verify input parameters.

    // The balloon tooltip text can be up to 255 chars long.
    ASSERT(AfxIsValidString(szText));
    ASSERT(lstrlen(szText) < 256);

    // The balloon title text can be up to 63 chars long.
    if (szTitle)
    {
        ASSERT(AfxIsValidString( szTitle));
        ASSERT(lstrlen(szTitle) < 64);
    }

    // dwBalloonIcon must be valid.
    ASSERT(NIIF_NONE == dwIcon    || NIIF_INFO == dwIcon ||
           NIIF_WARNING == dwIcon || NIIF_ERROR == dwIcon);

    // The timeout must be between 10 and 30 seconds.
    ASSERT(uTimeout >= 10 && uTimeout <= 30);


    m_tnd.uFlags = NIF_INFO;
    _tcsncpy(m_tnd.szInfo, szText, 256);
    if (szTitle)
        _tcsncpy(m_tnd.szInfoTitle, szTitle, 64);
    else
        m_tnd.szInfoTitle[0] = _T('\0');
    m_tnd.dwInfoFlags = dwIcon;
    m_tnd.uTimeout = uTimeout * 1000;   // convert time to ms

    BOOL bSuccess = Shell_NotifyIcon (NIM_MODIFY, &m_tnd);

    // Zero out the balloon text string so that later operations won't redisplay
    // the balloon.
    m_tnd.szInfo[0] = _T('\0');

    return bSuccess;
#endif
}

/////////////////////////////////////////////////////////////////////////////
// CSystemTray notification window stuff

BOOL CSystemTray::SetNotificationWnd(CWnd* pWnd)
{
    if (!m_bEnabled) 
        return FALSE;

    // Make sure Notification window is valid
    if (!pWnd || !::IsWindow(pWnd->GetSafeHwnd()))
    {
        ASSERT(FALSE);
        return FALSE;
    }

    m_tnd.hWnd = pWnd->GetSafeHwnd();
    m_tnd.uFlags = 0;

    if (m_bHidden)
        return TRUE;
    else
        return Shell_NotifyIcon(NIM_MODIFY, &m_tnd);
}

CWnd* CSystemTray::GetNotificationWnd() const
{
    return CWnd::FromHandle(m_tnd.hWnd);
}

// Hatr added

// Hatr added

// Change or retrive the window to send menu commands to
BOOL CSystemTray::SetTargetWnd(CWnd* pTargetWnd)
{
    m_pTargetWnd = pTargetWnd;
    return TRUE;
} // CSystemTray::SetTargetWnd()

CWnd* CSystemTray::GetTargetWnd() const
{
    if (m_pTargetWnd)
        return m_pTargetWnd;
    else
        return AfxGetMainWnd();
} // CSystemTray::GetTargetWnd()

/////////////////////////////////////////////////////////////////////////////
// CSystemTray notification message stuff

BOOL CSystemTray::SetCallbackMessage(UINT uCallbackMessage)
{
    if (!m_bEnabled)
        return FALSE;

    // Make sure we avoid conflict with other messages
    ASSERT(uCallbackMessage >= WM_APP);

    m_tnd.uCallbackMessage = uCallbackMessage;
    m_tnd.uFlags = NIF_MESSAGE;

    if (m_bHidden)
        return TRUE;
    else
        return Shell_NotifyIcon(NIM_MODIFY, &m_tnd);
}

UINT CSystemTray::GetCallbackMessage() const
{
    return m_tnd.uCallbackMessage;
}

/////////////////////////////////////////////////////////////////////////////
// CSystemTray menu manipulation

BOOL CSystemTray::SetMenuDefaultItem(UINT uItem, BOOL bByPos)
{
#ifdef _WIN32_WCE
    return FALSE;
#else
    if ((m_DefaultMenuItemID == uItem) && (m_DefaultMenuItemByPos == bByPos)) 
        return TRUE;

    m_DefaultMenuItemID = uItem;
    m_DefaultMenuItemByPos = bByPos;   

    CMenu menu, *pSubMenu;

    if (!menu.LoadMenu(m_tnd.uID))
        return FALSE;

    pSubMenu = menu.GetSubMenu(0);
    if (!pSubMenu)
        return FALSE;

    ::SetMenuDefaultItem(pSubMenu->m_hMenu, m_DefaultMenuItemID, m_DefaultMenuItemByPos);

    return TRUE;
#endif
}

void CSystemTray::GetMenuDefaultItem(UINT& uItem, BOOL& bByPos)
{
    uItem = m_DefaultMenuItemID;
    bByPos = m_DefaultMenuItemByPos;
}

/////////////////////////////////////////////////////////////////////////////
// CSystemTray message handlers

BEGIN_MESSAGE_MAP(CSystemTray, CWnd)
	//{{AFX_MSG_MAP(CSystemTray)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
#ifndef _WIN32_WCE
	ON_WM_SETTINGCHANGE()
#endif
    ON_REGISTERED_MESSAGE(CSystemTray::m_nTaskbarCreatedMsg, OnTaskbarCreated)
END_MESSAGE_MAP()

void CSystemTray::OnTimer(UINT nIDEvent) 
{
    if (nIDEvent != m_uIDTimer)
    {
        ASSERT(FALSE);
        return;
    }

    COleDateTime CurrentTime = COleDateTime::GetCurrentTime();
    COleDateTimeSpan period = CurrentTime - m_StartTime;

    if (m_nAnimationPeriod > 0 && m_nAnimationPeriod < period.GetTotalSeconds())
    {
        StopAnimation();
        return;
    }

    StepAnimation();
}

// This is called whenever the taskbar is created (eg after explorer crashes
// and restarts. Please note that the WM_TASKBARCREATED message is only passed
// to TOP LEVEL windows (like WM_QUERYNEWPALETTE)
LRESULT CSystemTray::OnTaskbarCreated(WPARAM /*wParam*/, LPARAM /*lParam*/) 
{
    InstallIconPending();
	return 0L;
}

#ifndef _WIN32_WCE
void CSystemTray::OnSettingChange(UINT uFlags, LPCTSTR lpszSection) 
{
	CWnd::OnSettingChange(uFlags, lpszSection);

    if (uFlags == SPI_SETWORKAREA)
        InstallIconPending();	
}
#endif

LRESULT CSystemTray::OnTrayNotification(UINT wParam, LONG lParam) 
{
    //Return quickly if its not for this tray icon
    if (wParam != m_tnd.uID)
        return 0L;

    CMenu menu, *pSubMenu;
    CWnd *pTargetWnd = GetTargetWnd();
    if (!pTargetWnd)
        return 0L;

    // Clicking with right button brings up a context menu
#if defined(_WIN32_WCE) //&& _WIN32_WCE < 211
    BOOL bAltPressed = ((GetKeyState(VK_MENU) & (1 << (sizeof(SHORT)*8-1))) != 0);
    if (LOWORD(lParam) == WM_LBUTTONUP && bAltPressed)
#else
    if (LOWORD(lParam) == WM_RBUTTONUP)
#endif
    {    
        if (!menu.LoadMenu(m_tnd.uID))
            return 0;
        
        pSubMenu = menu.GetSubMenu(0);
        if (!pSubMenu)
            return 0;

#ifndef _WIN32_WCE
        // Make chosen menu item the default (bold font)
        ::SetMenuDefaultItem(pSubMenu->m_hMenu, m_DefaultMenuItemID, m_DefaultMenuItemByPos);
#endif

        // Display and track the popup menu
        CPoint pos;
#ifdef _WIN32_WCE
        pos = CPoint(GetMessagePos());
#else
        GetCursorPos(&pos);
#endif

        pTargetWnd->SetForegroundWindow(); 
        
#ifndef _WIN32_WCE
        ::TrackPopupMenu(pSubMenu->m_hMenu, 0, pos.x, pos.y, 0, 
                         pTargetWnd->GetSafeHwnd(), NULL);
#else
        pSubMenu->TrackPopupMenu(TPM_LEFTALIGN, pos.x, pos.y, pTargetWnd, NULL);
#endif

        // BUGFIX: See "PRB: Menus for Notification Icons Don't Work Correctly"
        pTargetWnd->PostMessage(WM_NULL, 0, 0);

        menu.DestroyMenu();
    } 
#if defined(_WIN32_WCE) //&& _WIN32_WCE < 211
    if (LOWORD(lParam) == WM_LBUTTONDBLCLK || LOWORD(lParam) == WM_LBUTTONUP && bAltPressed)
#else
    else if (LOWORD(lParam) == WM_LBUTTONDBLCLK|| LOWORD(lParam) == WM_LBUTTONUP) 
#endif
    {
        // double click received, the default action is to execute default menu item
        pTargetWnd->SetForegroundWindow();  

        UINT uItem;
        if (m_DefaultMenuItemByPos)
        {
            if (!menu.LoadMenu(m_tnd.uID))
                return 0;
            
            pSubMenu = menu.GetSubMenu(0);
            if (!pSubMenu)
                return 0;
            
            uItem = pSubMenu->GetMenuItemID(m_DefaultMenuItemID);

			menu.DestroyMenu();
        }
        else
            uItem = m_DefaultMenuItemID;
        
        pTargetWnd->SendMessage(WM_COMMAND, uItem, 0);
    }

    return 1;
}

LRESULT CSystemTray::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
    if (message == m_tnd.uCallbackMessage)
        return OnTrayNotification(wParam, lParam);
	
	return CWnd::WindowProc(message, wParam, lParam);
}

void CSystemTray::InstallIconPending()
{
    // Is the icon display pending, and it's not been set as "hidden"?
    if (!m_bShowIconPending || m_bHidden)
        return;

	// Reset the flags to what was used at creation
	m_tnd.uFlags = m_uCreationFlags;

    // Try and recreate the icon
    m_bHidden = !Shell_NotifyIcon(NIM_ADD, &m_tnd);

    // If it's STILL hidden, then have another go next time...
    m_bShowIconPending = !m_bHidden;

    ASSERT(m_bHidden == FALSE);
}

/////////////////////////////////////////////////////////////////////////////
// For minimising/maximising from system tray

BOOL CALLBACK FindTrayWnd(HWND hwnd, LPARAM lParam)
{
    TCHAR szClassName[256];
    GetClassName(hwnd, szClassName, 255);

    // Did we find the Main System Tray? If so, then get its size and keep going
    if (_tcscmp(szClassName, _T("TrayNotifyWnd")) == 0)
    {
        CRect *pRect = (CRect*) lParam;
        ::GetWindowRect(hwnd, pRect);
        return TRUE;
    }

    // Did we find the System Clock? If so, then adjust the size of the rectangle
    // we have and quit (clock will be found after the system tray)
    if (_tcscmp(szClassName, _T("TrayClockWClass")) == 0)
    {
        CRect *pRect = (CRect*) lParam;
        CRect rectClock;
        ::GetWindowRect(hwnd, rectClock);
        // if clock is above system tray adjust accordingly
        if (rectClock.bottom < pRect->bottom-5) // 10 = random fudge factor.
            pRect->top = rectClock.bottom;
        else
            pRect->right = rectClock.left;
        return FALSE;
    }
 
    return TRUE;
}
 
#ifndef _WIN32_WCE
// enhanced version by Matthew Ellis <[e-mail]>
void CSystemTray::GetTrayWndRect(LPRECT lprect)
{
#define DEFAULT_RECT_WIDTH 150
#define DEFAULT_RECT_HEIGHT 30

    HWND hShellTrayWnd = ::FindWindow(_T("Shell_TrayWnd"), NULL);
    if (hShellTrayWnd)
    {
        ::GetWindowRect(hShellTrayWnd, lprect);
        EnumChildWindows(hShellTrayWnd, FindTrayWnd, (LPARAM)lprect);
        return;
    }
    // OK, we failed to get the rect from the quick hack. Either explorer isn't
    // running or it's a new version of the shell with the window class names
    // changed (how dare Microsoft change these undocumented class names!) So, we
    // try to find out what side of the screen the taskbar is connected to. We
    // know that the system tray is either on the right or the bottom of the
    // taskbar, so we can make a good guess at where to minimize to
    APPBARDATA appBarData;
    appBarData.cbSize=sizeof(appBarData);
    if (SHAppBarMessage(ABM_GETTASKBARPOS,&appBarData))
    {
        // We know the edge the taskbar is connected to, so guess the rect of the
        // system tray. Use various fudge factor to make it look good
        switch(appBarData.uEdge)
        {
        case ABE_LEFT:
        case ABE_RIGHT:
            // We want to minimize to the bottom of the taskbar
            lprect->top    = appBarData.rc.bottom-100;
            lprect->bottom = appBarData.rc.bottom-16;
            lprect->left   = appBarData.rc.left;
            lprect->right  = appBarData.rc.right;
            break;
            
        case ABE_TOP:
        case ABE_BOTTOM:
            // We want to minimize to the right of the taskbar
            lprect->top    = appBarData.rc.top;
            lprect->bottom = appBarData.rc.bottom;
            lprect->left   = appBarData.rc.right-100;
            lprect->right  = appBarData.rc.right-16;
            break;
        }
        return;
    }
    
    //  It's possible that a third party shell
    // is running instead of explorer. This shell might provide support for the
    // system tray, by providing a Shell_TrayWnd window (which receives the
    // messages for the icons) So, look for a Shell_TrayWnd window and work out
    // the rect from that. Remember that explorer's taskbar is the Shell_TrayWnd,
    // and stretches either the width or the height of the screen. We can't rely
    // on the 3rd party shell's Shell_TrayWnd doing the same, in fact, we can't
    // rely on it being any size. The best we can do is just blindly use the
    // window rect, perhaps limiting the width and height to, say 150 square.
    // Note that if the 3rd party shell supports the same configuraion as
    // explorer (the icons hosted in NotifyTrayWnd, which is a child window of
    // Shell_TrayWnd), we would already have caught it above
    if (hShellTrayWnd)
    {
        ::GetWindowRect(hShellTrayWnd, lprect);
        if (lprect->right - lprect->left > DEFAULT_RECT_WIDTH)
            lprect->left = lprect->right - DEFAULT_RECT_WIDTH;
        if (lprect->bottom - lprect->top > DEFAULT_RECT_HEIGHT)
            lprect->top = lprect->bottom - DEFAULT_RECT_HEIGHT;
        
        return;
    }
    
    // OK. Haven't found a thing. Provide a default rect based on the current work
    // area
    SystemParametersInfo(SPI_GETWORKAREA,0, lprect, 0);
    lprect->left = lprect->right - DEFAULT_RECT_WIDTH;
    lprect->top  = lprect->bottom - DEFAULT_RECT_HEIGHT;
}

// Check to see if the animation has been disabled (Matthew Ellis <[e-mail]>)
BOOL CSystemTray::GetDoWndAnimation()
{
  ANIMATIONINFO ai;

  ai.cbSize=sizeof(ai);
  SystemParametersInfo(SPI_GETANIMATION,sizeof(ai),&ai,0);

  return ai.iMinAnimate?TRUE:FALSE;
}
#endif

BOOL CSystemTray::RemoveTaskbarIcon(CWnd* pWnd)
{
    LPCTSTR pstrOwnerClass = AfxRegisterWndClass(0);

    // Create static invisible window
    if (!::IsWindow(m_wndInvisible.m_hWnd))
    {
		if (!m_wndInvisible.CreateEx(0, pstrOwnerClass, _T(""), WS_POPUP,
				CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, 0))
			return FALSE;
    }

    pWnd->SetParent(&m_wndInvisible);

    return TRUE;
}

void CSystemTray::MinimiseToTray(CWnd* pWnd)
{
#ifndef _WIN32_WCE
    if (GetDoWndAnimation())
    {
        CRect rectFrom, rectTo;

        pWnd->GetWindowRect(rectFrom);
        GetTrayWndRect(rectTo);

		::DrawAnimatedRects(pWnd->m_hWnd, IDANI_CAPTION, rectFrom, rectTo);
    }

    RemoveTaskbarIcon(pWnd);
    pWnd->ModifyStyle(WS_VISIBLE, 0);
#endif
}

void CSystemTray::MaximiseFromTray(CWnd* pWnd)
{
#ifndef _WIN32_WCE
    if (GetDoWndAnimation())
    {
        CRect rectTo;
        pWnd->GetWindowRect(rectTo);

        CRect rectFrom;
        GetTrayWndRect(rectFrom);

        pWnd->SetParent(NULL);
		::DrawAnimatedRects(pWnd->m_hWnd, IDANI_CAPTION, rectFrom, rectTo);
    }
    else
        pWnd->SetParent(NULL);

    pWnd->ModifyStyle(0, WS_VISIBLE);
    pWnd->RedrawWindow(NULL, NULL, RDW_UPDATENOW | RDW_ALLCHILDREN | RDW_FRAME |
                                   RDW_INVALIDATE | RDW_ERASE);

    // Move focus away and back again to ensure taskbar icon is recreated
    if (::IsWindow(m_wndInvisible.m_hWnd))
        m_wndInvisible.SetActiveWindow();
    pWnd->SetActiveWindow();
    pWnd->SetForegroundWindow();
#endif
}