beepprop.cpp

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/*
 * BEEPPROP.CPP
 * Beeper Property Page Chapter 16
 *
 * Server module code and class code CBeeperPropertyPage class.
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#define INITGUIDS
#include "beepprop.h"


//Count number of objects and number of locks.
ULONG       g_cObj=0;
ULONG       g_cLock=0;
HINSTANCE   g_hInst=NULL;   //For resources

#ifdef WIN32
TCHAR       g_szObj[]=TEXT("Object");
#else
TCHAR       g_szObjHi[]=TEXT("ObjectHi");
TCHAR       g_szObjLo[]=TEXT("ObjectLo");
#endif

/*
 * LibMain(32)
 *
 * Purpose:
 *  Entry point conditionally compiled for Win32 and Windows
 *  3.1.  Provides the proper structure for each environment.
 */

#ifdef WIN32
BOOL WINAPI LibMain32(HINSTANCE hInstance, ULONG ulReason
    , LPVOID pvReserved)
    {
    g_hInst=hInstance;

    if (DLL_PROCESS_DETACH==ulReason)
        {
        return TRUE;
        }
    else
        {
        if (DLL_PROCESS_ATTACH!=ulReason)
            return TRUE;
        }

    return TRUE;
    }
#else
int PASCAL LibMain(HINSTANCE hInstance, WORD wDataSeg
    , WORD cbHeapSize, LPSTR lpCmdLine)
    {
    if (0!=cbHeapSize)
        UnlockData(0);

    g_hInst=hInstance;
    return (int)hInstance;
    }
#endif



/*
 * DllGetClassObject
 * DllCanUnloadNow
 * Standard COM exports for DLL servers.
 */

HRESULT APIENTRY DllGetClassObject(REFCLSID rclsid, REFIID riid
    , PPVOID ppv)
    {
    CBeeperPPFactory *pBF;
    HRESULT         hr;

    if (CLSID_BeeperPropertyPage!=rclsid)
        return ResultFromScode(E_FAIL);

    //Check that we can provide the interface
    if (IID_IUnknown!=riid && IID_IClassFactory!=riid)
        return ResultFromScode(E_NOINTERFACE);

    //Return our beeper factory's IClassFactory
    pBF=new CBeeperPPFactory();

    if (NULL==pBF)
        return ResultFromScode(E_OUTOFMEMORY);

    //If the factory hasn't the interface, delete it
    hr=pBF->QueryInterface(riid, ppv);

    if (FAILED(hr))
        delete pBF;
    else
        g_cObj++;

    return hr;
    }


STDAPI DllCanUnloadNow(void)
    {
    SCODE   sc;

    //Our answer is whether there are any object or locks
    sc=(0L==g_cObj && 0L==g_cLock) ? S_OK : S_FALSE;
    return ResultFromScode(sc);
    }



/*
 * CBeeperPPFactory::CBeeperPPFactory
 * CBeeperPPFactory::~CBeeperPPFactory
 * CBeeperPPFactory::QueryInterface
 * CBeeperPPFactory::AddRef
 * CBeeperPPFactory::Release
 */

CBeeperPPFactory::CBeeperPPFactory(void)
    {
    m_cRef=0L;
    return;
    }

CBeeperPPFactory::~CBeeperPPFactory(void)
    {
    return;
    }

STDMETHODIMP CBeeperPPFactory::QueryInterface(REFIID riid, PPVOID ppv)
    {
    *ppv=NULL;

    if (IID_IUnknown==riid || IID_IClassFactory==riid)
        *ppv=this;

    if (NULL!=*ppv)
        {
        ((LPUNKNOWN)*ppv)->AddRef();
        return NOERROR;
        }

    return ResultFromScode(E_NOINTERFACE);
    }


STDMETHODIMP_(ULONG) CBeeperPPFactory::AddRef(void)
    {
    return ++m_cRef;
    }


STDMETHODIMP_(ULONG) CBeeperPPFactory::Release(void)
    {
    if (0!=--m_cRef)
        return m_cRef;

    delete this;
    g_cObj--;
    return 0;
    }



/*
 * CBeeperPPFactory::CreateInstance
 * CBeeperPPFactory::LockServer
 */

STDMETHODIMP CBeeperPPFactory::CreateInstance(LPUNKNOWN pUnkOuter
    , REFIID riid, PPVOID ppvObj)
    {
    PCBeeperPropPage    pObj;
    HRESULT             hr;

    *ppvObj=NULL;
    hr=ResultFromScode(E_OUTOFMEMORY);

    //No aggregation supported
    if (NULL!=pUnkOuter)
        return ResultFromScode(CLASS_E_NOAGGREGATION);

    //Create the object passing function to notify on destruction.
    pObj=new CBeeperPropPage(g_hInst);

    if (NULL==pObj)
        return hr;

    if (pObj->Init())
        hr=pObj->QueryInterface(riid, ppvObj);

    //Kill the object if initial creation or Init failed.
    if (FAILED(hr))
        delete pObj;
    else
        g_cObj++;

    return hr;
    }


STDMETHODIMP CBeeperPPFactory::LockServer(BOOL fLock)
    {
    if (fLock)
        g_cLock++;
    else
        g_cLock--;

    return NOERROR;
    }



/***
 *** CBeeperPropPage implementation
 ***/


/*
 * CBeeperPropPage::CBeeperPropPage
 * CBeeperPropPage::~CBeeperPropPage
 *
 * Constructor Parameters:
 *  hInst           HINSTANCE of the module
 */

CBeeperPropPage::CBeeperPropPage(HINSTANCE hInst)
    {
    m_cRef=0L;

    m_hInst=hInst;
    m_uIDTemplate=IDD_BEEPERPROPS_0;
    m_hDlg=NULL;

    //Default sizes
    m_cx=300;
    m_cy=100;

    m_pIPropertyPageSite=NULL;
    m_ppIBeeper=NULL;
    m_cObjects=0;

    m_uIDLastSound=IDC_BEEPDEFAULT;
    m_fDirty=FALSE;

    m_lcid=LOCALE_USER_DEFAULT;
    return;
    }

CBeeperPropPage::~CBeeperPropPage(void)
    {
    if (NULL!=m_hDlg)
        DestroyWindow(m_hDlg);

    FreeAllObjects();
    ReleaseInterface(m_pIPropertyPageSite);
    return;
    }


/*
 * CBeeperPropPage::QueryInterface
 * CBeeperPropPage::AddRef
 * CBeeperPropPage::Release
 */

STDMETHODIMP CBeeperPropPage::QueryInterface(REFIID riid, PPVOID ppv)
    {
    *ppv=NULL;

    if (IID_IUnknown==riid || IID_IPropertyPage==riid)
        *ppv=this;

    if (NULL!=*ppv)
        {
        ((LPUNKNOWN)*ppv)->AddRef();
        return NOERROR;
        }

    return ResultFromScode(E_NOINTERFACE);
    }


STDMETHODIMP_(ULONG) CBeeperPropPage::AddRef(void)
    {
    return ++m_cRef;
    }


STDMETHODIMP_(ULONG) CBeeperPropPage::Release(void)
    {
    if (0!=--m_cRef)
        return m_cRef;

    g_cObj--;
    delete this;
    return 0;
    }




/*
 * CBeeperPropPage::Init
 *
 * Purpose:
 *  Performs initialization operations that might fail.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if initialization successful, FALSE
 *                  otherwise.
 */

BOOL CBeeperPropPage::Init(void)
    {
    //Nothing to do
    return TRUE;
    }




/*
 * CBeeperPropPage::FreeAllObjects
 *
 * Purpose:
 *  Releases all the objects from IPropertyPage::SetObjects
 *
 * Parameters:
 *  None
 */

void CBeeperPropPage::FreeAllObjects(void)
    {
    UINT        i;

    if (NULL==m_ppIBeeper)
        return;

    for (i=0; i < m_cObjects; i++)
        ReleaseInterface(m_ppIBeeper[i]);

    delete [] m_ppIBeeper;
    m_ppIBeeper=NULL;
    m_cObjects=0;
    return;
    }



/*
 * CBeeperPropPage::SetPageSite
 *
 * Purpose:
 *  Provides the property page with the IPropertyPageSite
 *  that contains it.  SetPageSite(NULL) will be called as
 *  part of the close sequence.
 *
 * Parameters:
 *  pPageSite       LPPROPERTYPAGESITE pointer to the site.
 */

STDMETHODIMP CBeeperPropPage::SetPageSite
    (LPPROPERTYPAGESITE pPageSite)
    {
    if (NULL==pPageSite)
        ReleaseInterface(m_pIPropertyPageSite)
    else
        {
        HWND        hDlg;
        RECT        rc;
        LCID        lcid;

        m_pIPropertyPageSite=pPageSite;
        m_pIPropertyPageSite->AddRef();

        if (SUCCEEDED(m_pIPropertyPageSite->GetLocaleID(&lcid)))
            m_lcid=lcid;

        /*
         * Now that we know the locale we're running under, we can
         * load the dialog and determine the size it will be to
         * return through GetPageSize.  We just create the dialog
         * here and destroy it again to retrieve the size,
         * leaving Activate to create it for real.
         */

        switch (PRIMARYLANGID(m_lcid))
            {
            case LANG_GERMAN:
                m_uIDTemplate=IDD_BEEPERPROPS_7;
                break;

            case LANG_NEUTRAL:
            case LANG_ENGLISH:
            default:
                m_uIDTemplate=IDD_BEEPERPROPS_0;
                break;
            }

        hDlg=CreateDialogParam(m_hInst
            , MAKEINTRESOURCE(m_uIDTemplate), GetDesktopWindow()
            , (DLGPROC)BeepPropPageProc, 0L);

        //If creation fails, use default values set in constructor
        if (NULL!=hDlg)
            {
            GetWindowRect(hDlg, &rc);
            m_cx=rc.right-rc.left;
            m_cy=rc.bottom-rc.top;

            DestroyWindow(hDlg);
            }
        }

    return NOERROR;
    }



/*
 * CBeeperPropPage::Activate
 *
 * Purpose:
 *  Instructs the property page to create a window in which to