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Diffstat (limited to 'src/imports/nfc/qdeclarativenearfield.cpp')
| -rw-r--r-- | src/imports/nfc/qdeclarativenearfield.cpp | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/src/imports/nfc/qdeclarativenearfield.cpp b/src/imports/nfc/qdeclarativenearfield.cpp new file mode 100644 index 00000000..27ad42ca --- /dev/null +++ b/src/imports/nfc/qdeclarativenearfield.cpp @@ -0,0 +1,285 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtNfc module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 "qdeclarativenearfield_p.h" +#include "qdeclarativendeffilter_p.h" +#include "qdeclarativendeftextrecord_p.h" +#include "qdeclarativendefurirecord_p.h" +#include "qdeclarativendefmimerecord_p.h" + +#include <qndefmessage.h> +#include <qndefnfctextrecord.h> +#include <qndefnfcurirecord.h> + +/*! + \qmlclass NearField QDeclarativeNearField + \brief The NearField element provides access to NDEF messages stored on NFC Forum tags. + + \ingroup connectivity-qml + \inmodule QtConnectivity + + \sa NdefFilter + \sa NdefRecord + + \sa QNearFieldManager + \sa QNdefMessage + \sa QNdefRecord + + The NearField element is part of the \bold {QtNfc 5.0} module. + + The NearField element can be used to read NDEF messages from NFC Forum tags. Set the \l filter + and \l orderMatch properties to match the required NDEF messages. Once an NDEF message is + successfully read from a tag the \l messageRecords property is updated. + + \code + NearField { + filter: [ NdefFilter { type: "urn:nfc:wkt:U"; minimum: 1; maximum: 1 } ] + orderMatch: false + + onMessageRecordsChanged: displayMessage() + } + \endcode +*/ + +/*! + \qmlproperty list<NdefRecord> NearField::messageRecords + + This property contains the list of NDEF records in the last NDEF message read. +*/ + +/*! + \qmlproperty list<NdefFilter> NearField::filter + + This property holds the NDEF filter constraints. The \l messageRecords property will only be + set to NDEF messages which match the filter. +*/ + +/*! + \qmlproperty bool NearField::orderMatch + + This property indicates whether the order of records should be taken into account when matching + messages. +*/ + +QDeclarativeNearField::QDeclarativeNearField(QObject *parent) +: QObject(parent), m_orderMatch(false), m_componentCompleted(false), m_messageUpdating(false), + m_manager(0), m_messageHandlerId(-1) +{ +} + +QDeclarativeListProperty<QDeclarativeNdefRecord> QDeclarativeNearField::messageRecords() +{ + return QDeclarativeListProperty<QDeclarativeNdefRecord>(this, 0, + &QDeclarativeNearField::append_messageRecord, + &QDeclarativeNearField::count_messageRecords, + &QDeclarativeNearField::at_messageRecord, + &QDeclarativeNearField::clear_messageRecords); + +} + +QDeclarativeListProperty<QDeclarativeNdefFilter> QDeclarativeNearField::filter() +{ + return QDeclarativeListProperty<QDeclarativeNdefFilter>(this, 0, + &QDeclarativeNearField::append_filter, + &QDeclarativeNearField::count_filters, + &QDeclarativeNearField::at_filter, + &QDeclarativeNearField::clear_filter); +} + +bool QDeclarativeNearField::orderMatch() const +{ + return m_orderMatch; +} + +void QDeclarativeNearField::setOrderMatch(bool on) +{ + if (m_orderMatch == on) + return; + + m_orderMatch = on; + emit orderMatchChanged(); +} + +void QDeclarativeNearField::componentComplete() +{ + m_componentCompleted = true; + + if (!m_filter.isEmpty()) + registerMessageHandler(); +} + +void QDeclarativeNearField::registerMessageHandler() +{ + if (!m_manager) + m_manager = new QNearFieldManager(this); + + if (m_messageHandlerId != -1) + m_manager->unregisterNdefMessageHandler(m_messageHandlerId); + + // no filter abort + if (m_filter.isEmpty()) + return; + + QNdefFilter filter; + filter.setOrderMatch(m_orderMatch); + foreach (QDeclarativeNdefFilter *f, m_filter) { + const QString type = f->type(); + uint min = f->minimum() < 0 ? UINT_MAX : f->minimum(); + uint max = f->maximum() < 0 ? UINT_MAX : f->maximum(); + + if (type.startsWith(QLatin1String("urn:nfc:wkt:"))) + filter.appendRecord(QNdefRecord::NfcRtd, type.mid(12).toUtf8(), min, max); + else if (type.startsWith(QLatin1String("urn:nfc:ext:"))) + filter.appendRecord(QNdefRecord::ExternalRtd, type.mid(12).toUtf8(), min, max); + else if (type.startsWith(QLatin1String("urn:nfc:mime"))) + filter.appendRecord(QNdefRecord::Mime, type.mid(13).toUtf8(), min, max); + else + qWarning("Unknown NDEF record type %s", qPrintable(type)); + } + + m_messageHandlerId = m_manager->registerNdefMessageHandler(filter, this, SLOT(_q_handleNdefMessage(QNdefMessage))); +} + +void QDeclarativeNearField::_q_handleNdefMessage(const QNdefMessage &message) +{ + m_messageUpdating = true; + + QDeclarativeListReference listRef(this, "messageRecords"); + + listRef.clear(); + + foreach (const QNdefRecord &record, message) + listRef.append(qNewDeclarativeNdefRecordForNdefRecord(record)); + + m_messageUpdating = false; + + emit messageRecordsChanged(); +} + +void QDeclarativeNearField::append_messageRecord(QDeclarativeListProperty<QDeclarativeNdefRecord> *list, + QDeclarativeNdefRecord *record) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return; + + record->setParent(nearField); + nearField->m_message.append(record); + if (!nearField->m_messageUpdating) + emit nearField->messageRecordsChanged(); +} + +int QDeclarativeNearField::count_messageRecords(QDeclarativeListProperty<QDeclarativeNdefRecord> *list) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return 0; + + return nearField->m_message.count(); +} + +QDeclarativeNdefRecord *QDeclarativeNearField::at_messageRecord(QDeclarativeListProperty<QDeclarativeNdefRecord> *list, + int index) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return 0; + + return nearField->m_message.at(index); +} + +void QDeclarativeNearField::clear_messageRecords(QDeclarativeListProperty<QDeclarativeNdefRecord> *list) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (nearField) { + qDeleteAll(nearField->m_message); + nearField->m_message.clear(); + if (!nearField->m_messageUpdating) + emit nearField->messageRecordsChanged(); + } +} + +void QDeclarativeNearField::append_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list, + QDeclarativeNdefFilter *filter) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return; + + filter->setParent(nearField); + nearField->m_filter.append(filter); + emit nearField->filterChanged(); + + if (nearField->m_componentCompleted) + nearField->registerMessageHandler(); +} + +int QDeclarativeNearField::count_filters(QDeclarativeListProperty<QDeclarativeNdefFilter> *list) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return 0; + + return nearField->m_filter.count(); +} + +QDeclarativeNdefFilter *QDeclarativeNearField::at_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list, + int index) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return 0; + + return nearField->m_filter.at(index); +} + +void QDeclarativeNearField::clear_filter(QDeclarativeListProperty<QDeclarativeNdefFilter> *list) +{ + QDeclarativeNearField *nearField = qobject_cast<QDeclarativeNearField *>(list->object); + if (!nearField) + return; + + qDeleteAll(nearField->m_filter); + nearField->m_filter.clear(); + emit nearField->filterChanged(); + if (nearField->m_componentCompleted) + nearField->registerMessageHandler(); +} |