1/****************************************************************************
2**
3** Copyright (C) 2017 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtNfc module.
7**
8** $QT_BEGIN_LICENSE:BSD$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50#include "annotatedurl.h"
51
52#include <QtNfc/qnearfieldmanager.h>
53#include <QtNfc/qnearfieldtarget.h>
54#include <QtNfc/qndefmessage.h>
55#include <QtNfc/qndefrecord.h>
56#include <QtNfc/qndefnfctextrecord.h>
57#include <QtNfc/qndefnfcurirecord.h>
58
59#include <QtWidgets/QGridLayout>
60#include <QtWidgets/QLabel>
61#include <QtGui/QMouseEvent>
62#include <QtGui/QDesktopServices>
63#include <QtCore/QDebug>
64#include <QtCore/QLocale>
65#include <QtCore/QUrl>
66
67AnnotatedUrl::AnnotatedUrl(QObject *parent)
68: QObject(parent)
69{
70 //! [QNearFieldManager register handler]
71 manager = new QNearFieldManager(this);
72 if (!manager->isAvailable()) {
73 qWarning() << "NFC not available";
74 return;
75 }
76
77 QNdefFilter filter;
78 filter.setOrderMatch(false);
79 filter.appendRecord<QNdefNfcTextRecord>(min: 1, UINT_MAX);
80 filter.appendRecord<QNdefNfcUriRecord>();
81 // type parameter cannot specify substring so filter for "image/" below
82 filter.appendRecord(typeNameFormat: QNdefRecord::Mime, type: QByteArray(), min: 0, max: 1);
83
84 int result = manager->registerNdefMessageHandler(filter, object: this,
85 SLOT(handleMessage(QNdefMessage,QNearFieldTarget*)));
86 //! [QNearFieldManager register handler]
87
88 if (result < 0)
89 qWarning() << "Platform does not support NDEF message handler registration";
90
91 manager->startTargetDetection();
92 connect(sender: manager, signal: &QNearFieldManager::targetDetected,
93 receiver: this, slot: &AnnotatedUrl::targetDetected);
94 connect(sender: manager, signal: &QNearFieldManager::targetLost,
95 receiver: this, slot: &AnnotatedUrl::targetLost);
96}
97
98AnnotatedUrl::~AnnotatedUrl()
99{
100
101}
102
103void AnnotatedUrl::targetDetected(QNearFieldTarget *target)
104{
105 if (!target)
106 return;
107
108 connect(sender: target, signal: &QNearFieldTarget::ndefMessageRead,
109 receiver: this, slot: &AnnotatedUrl::handlePolledNdefMessage);
110 target->readNdefMessages();
111}
112
113void AnnotatedUrl::targetLost(QNearFieldTarget *target)
114{
115 if (target)
116 target->deleteLater();
117}
118
119void AnnotatedUrl::handlePolledNdefMessage(QNdefMessage message)
120{
121 QNearFieldTarget *target = qobject_cast<QNearFieldTarget *>(object: sender());
122 handleMessage(message, target);
123}
124
125//! [handleMessage 1]
126void AnnotatedUrl::handleMessage(const QNdefMessage &message, QNearFieldTarget *target)
127{
128//! [handleMessage 1]
129 Q_UNUSED(target);
130
131 enum {
132 MatchedNone,
133 MatchedFirst,
134 MatchedEnglish,
135 MatchedLanguage,
136 MatchedLanguageAndCountry
137 } bestMatch = MatchedNone;
138
139 QLocale defaultLocale;
140
141 QString title;
142 QUrl url;
143 QPixmap pixmap;
144
145//! [handleMessage 2]
146 for (const QNdefRecord &record : message) {
147 if (record.isRecordType<QNdefNfcTextRecord>()) {
148 QNdefNfcTextRecord textRecord(record);
149
150 title = textRecord.text();
151 QLocale locale(textRecord.locale());
152//! [handleMessage 2]
153 // already found best match
154 if (bestMatch == MatchedLanguageAndCountry) {
155 // do nothing
156 } else if (bestMatch <= MatchedLanguage && locale == defaultLocale) {
157 bestMatch = MatchedLanguageAndCountry;
158 } else if (bestMatch <= MatchedEnglish &&
159 locale.language() == defaultLocale.language()) {
160 bestMatch = MatchedLanguage;
161 } else if (bestMatch <= MatchedFirst && locale.language() == QLocale::English) {
162 bestMatch = MatchedEnglish;
163 } else if (bestMatch == MatchedNone) {
164 bestMatch = MatchedFirst;
165 }
166//! [handleMessage 3]
167 } else if (record.isRecordType<QNdefNfcUriRecord>()) {
168 QNdefNfcUriRecord uriRecord(record);
169
170 url = uriRecord.uri();
171 } else if (record.typeNameFormat() == QNdefRecord::Mime &&
172 record.type().startsWith(c: "image/")) {
173 pixmap = QPixmap::fromImage(image: QImage::fromData(data: record.payload()));
174 }
175//! [handleMessage 3]
176//! [handleMessage 4]
177 }
178
179 emit annotatedUrl(url, title, pixmap);
180}
181//! [handleMessage 4]
182

source code of qtconnectivity/examples/nfc/annotatedurl/annotatedurl.cpp