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50
51#include "devicefinder.h"
52#include "devicehandler.h"
53#include "deviceinfo.h"
54
55DeviceFinder::DeviceFinder(DeviceHandler *handler, QObject *parent):
56 BluetoothBaseClass(parent),
57 m_deviceHandler(handler)
58{
59 //! [devicediscovery-1]
60 m_deviceDiscoveryAgent = new QBluetoothDeviceDiscoveryAgent(this);
61 m_deviceDiscoveryAgent->setLowEnergyDiscoveryTimeout(5000);
62
63 connect(sender: m_deviceDiscoveryAgent, signal: &QBluetoothDeviceDiscoveryAgent::deviceDiscovered, receiver: this, slot: &DeviceFinder::addDevice);
64 connect(sender: m_deviceDiscoveryAgent, signal: static_cast<void (QBluetoothDeviceDiscoveryAgent::*)(QBluetoothDeviceDiscoveryAgent::Error)>(&QBluetoothDeviceDiscoveryAgent::error),
65 receiver: this, slot: &DeviceFinder::scanError);
66
67 connect(sender: m_deviceDiscoveryAgent, signal: &QBluetoothDeviceDiscoveryAgent::finished, receiver: this, slot: &DeviceFinder::scanFinished);
68 connect(sender: m_deviceDiscoveryAgent, signal: &QBluetoothDeviceDiscoveryAgent::canceled, receiver: this, slot: &DeviceFinder::scanFinished);
69 //! [devicediscovery-1]
70
71
72#ifdef SIMULATOR
73 m_demoTimer.setSingleShot(true);
74 m_demoTimer.setInterval(2000);
75 connect(&m_demoTimer, &QTimer::timeout, this, &DeviceFinder::scanFinished);
76#endif
77}
78
79DeviceFinder::~DeviceFinder()
80{
81 qDeleteAll(c: m_devices);
82 m_devices.clear();
83}
84
85void DeviceFinder::startSearch()
86{
87 clearMessages();
88 m_deviceHandler->setDevice(nullptr);
89 qDeleteAll(c: m_devices);
90 m_devices.clear();
91
92 emit devicesChanged();
93
94#ifdef SIMULATOR
95 m_demoTimer.start();
96#else
97 //! [devicediscovery-2]
98 m_deviceDiscoveryAgent->start(method: QBluetoothDeviceDiscoveryAgent::LowEnergyMethod);
99 //! [devicediscovery-2]
100#endif
101 emit scanningChanged();
102 setInfo(tr(s: "Scanning for devices..."));
103}
104
105//! [devicediscovery-3]
106void DeviceFinder::addDevice(const QBluetoothDeviceInfo &device)
107{
108 // If device is LowEnergy-device, add it to the list
109 if (device.coreConfigurations() & QBluetoothDeviceInfo::LowEnergyCoreConfiguration) {
110 m_devices.append(t: new DeviceInfo(device));
111 setInfo(tr(s: "Low Energy device found. Scanning more..."));
112//! [devicediscovery-3]
113 emit devicesChanged();
114//! [devicediscovery-4]
115 }
116 //...
117}
118//! [devicediscovery-4]
119
120void DeviceFinder::scanError(QBluetoothDeviceDiscoveryAgent::Error error)
121{
122 if (error == QBluetoothDeviceDiscoveryAgent::PoweredOffError)
123 setError(tr(s: "The Bluetooth adaptor is powered off."));
124 else if (error == QBluetoothDeviceDiscoveryAgent::InputOutputError)
125 setError(tr(s: "Writing or reading from the device resulted in an error."));
126 else
127 setError(tr(s: "An unknown error has occurred."));
128}
129
130void DeviceFinder::scanFinished()
131{
132#ifdef SIMULATOR
133 // Only for testing
134 for (int i = 0; i < 4; i++)
135 m_devices.append(new DeviceInfo(QBluetoothDeviceInfo()));
136#endif
137
138 if (m_devices.isEmpty())
139 setError(tr(s: "No Low Energy devices found."));
140 else
141 setInfo(tr(s: "Scanning done."));
142
143 emit scanningChanged();
144 emit devicesChanged();
145}
146
147void DeviceFinder::connectToService(const QString &address)
148{
149 m_deviceDiscoveryAgent->stop();
150
151 DeviceInfo *currentDevice = nullptr;
152 for (QObject *entry : qAsConst(t&: m_devices)) {
153 auto device = qobject_cast<DeviceInfo *>(object: entry);
154 if (device && device->getAddress() == address ) {
155 currentDevice = device;
156 break;
157 }
158 }
159
160 if (currentDevice)
161 m_deviceHandler->setDevice(currentDevice);
162
163 clearMessages();
164}
165
166bool DeviceFinder::scanning() const
167{
168#ifdef SIMULATOR
169 return m_demoTimer.isActive();
170#else
171 return m_deviceDiscoveryAgent->isActive();
172#endif
173}
174
175QVariant DeviceFinder::devices()
176{
177 return QVariant::fromValue(value: m_devices);
178}
179

source code of qtconnectivity/examples/bluetooth/heartrate-game/devicefinder.cpp