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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwmpevents.h"
#include "qwmpglobal.h"
QWmpEvents::QWmpEvents(IUnknown *source, QObject *parent)
: QObject(parent)
, m_ref(1)
, m_connectionPoint(0)
, m_adviseCookie(0)
{
HRESULT hr;
IConnectionPointContainer *container = 0;
if ((hr = source->QueryInterface(
IID_IConnectionPointContainer, reinterpret_cast<void **>(&container))) != S_OK) {
qWarning("No connection point container, %x: %d", hr, qwmp_error_string(hr));
} else {
if ((hr = container->FindConnectionPoint(
__uuidof(IWMPEvents), &m_connectionPoint)) != S_OK) {
qWarning("No connection point for IWMPEvents %d", hr);
} else if ((hr = m_connectionPoint->Advise(
static_cast<IWMPEvents3 *>(this), &m_adviseCookie)) != S_OK) {
qWarning("Failed to link to connection point, %x, %s", hr, qwmp_error_string(hr));
m_connectionPoint->Release();
m_connectionPoint = 0;
}
container->Release();
}
}
QWmpEvents::~QWmpEvents()
{
if (m_connectionPoint) {
m_connectionPoint->Unadvise(m_adviseCookie);
m_connectionPoint->Release();
}
Q_ASSERT(m_ref == 1);
}
// IUnknown
HRESULT QWmpEvents::QueryInterface(REFIID riid, void **object)
{
if (!object) {
return E_POINTER;
} else if (riid == __uuidof(IUnknown)
|| riid == __uuidof(IWMPEvents)
|| riid == __uuidof(IWMPEvents2)
|| riid == __uuidof(IWMPEvents3)) {
*object = static_cast<IWMPEvents3 *>(this);
AddRef();
return S_OK;
} else {
return E_NOINTERFACE;
}
}
ULONG QWmpEvents::AddRef()
{
return InterlockedIncrement(&m_ref);
}
ULONG QWmpEvents::Release()
{
ULONG ref = InterlockedDecrement(&m_ref);
Q_ASSERT(ref != 0);
return ref;
}
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