<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>devicefinder.cpp Example File | Qt Bluetooth 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qtbluetooth-index.html">Qt Bluetooth</a></td><td ><a href="qtbluetooth-heartrate-game-example.html">Bluetooth Low Energy Heart Rate Game</a></td><td >devicefinder.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">devicefinder.cpp Example File</h1> <span class="subtitle">heartrate-game/devicefinder.cpp</span> <!-- $$$heartrate-game/devicefinder.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/*************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the QtBluetooth module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "devicefinder.h"</span> <span class="preprocessor">#include "devicehandler.h"</span> <span class="preprocessor">#include "deviceinfo.h"</span> DeviceFinder<span class="operator">::</span>DeviceFinder(DeviceHandler <span class="operator">*</span>handler<span class="operator">,</span> <span class="type">QObject</span> <span class="operator">*</span>parent): BluetoothBaseClass(parent)<span class="operator">,</span> m_deviceHandler(handler) { m_deviceDiscoveryAgent <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span>(<span class="keyword">this</span>); m_deviceDiscoveryAgent<span class="operator">-</span><span class="operator">></span>setLowEnergyDiscoveryTimeout(<span class="number">5000</span>); connect(m_deviceDiscoveryAgent<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>deviceDiscovered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>DeviceFinder<span class="operator">::</span>addDevice); connect(m_deviceDiscoveryAgent<span class="operator">,</span> <span class="keyword">static_cast</span><span class="operator"><</span><span class="type">void</span> (<span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span><span class="operator">*</span>)(<span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>Error)<span class="operator">></span>(<span class="operator">&</span><span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>error)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>DeviceFinder<span class="operator">::</span>scanError); connect(m_deviceDiscoveryAgent<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>finished<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>DeviceFinder<span class="operator">::</span>scanFinished); connect(m_deviceDiscoveryAgent<span class="operator">,</span> <span class="operator">&</span><span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>canceled<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>DeviceFinder<span class="operator">::</span>scanFinished); <span class="preprocessor">#ifdef SIMULATOR</span> m_demoTimer<span class="operator">.</span>setSingleShot(<span class="keyword">true</span>); m_demoTimer<span class="operator">.</span>setInterval(<span class="number">2000</span>); connect(<span class="operator">&</span>m_demoTimer<span class="operator">,</span> <span class="operator">&</span><span class="type">QTimer</span><span class="operator">::</span>timeout<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>DeviceFinder<span class="operator">::</span>scanFinished); <span class="preprocessor">#endif</span> } DeviceFinder<span class="operator">::</span><span class="operator">~</span>DeviceFinder() { qDeleteAll(m_devices); m_devices<span class="operator">.</span>clear(); } <span class="type">void</span> DeviceFinder<span class="operator">::</span>startSearch() { clearMessages(); m_deviceHandler<span class="operator">-</span><span class="operator">></span>setDevice(<span class="number">0</span>); qDeleteAll(m_devices); m_devices<span class="operator">.</span>clear(); <span class="keyword">emit</span> devicesChanged(); <span class="preprocessor">#ifdef SIMULATOR</span> m_demoTimer<span class="operator">.</span>start(); <span class="preprocessor">#else</span> m_deviceDiscoveryAgent<span class="operator">-</span><span class="operator">></span>start(<span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>LowEnergyMethod); <span class="preprocessor">#endif</span> <span class="keyword">emit</span> scanningChanged(); setInfo(tr(<span class="string">"Scanning for devices..."</span>)); } <span class="type">void</span> DeviceFinder<span class="operator">::</span>addDevice(<span class="keyword">const</span> <span class="type"><a href="qbluetoothdeviceinfo.html">QBluetoothDeviceInfo</a></span> <span class="operator">&</span>device) { <span class="comment">// If device is LowEnergy-device, add it to the list</span> <span class="keyword">if</span> (device<span class="operator">.</span>coreConfigurations() <span class="operator">&</span> <span class="type"><a href="qbluetoothdeviceinfo.html">QBluetoothDeviceInfo</a></span><span class="operator">::</span>LowEnergyCoreConfiguration) { m_devices<span class="operator">.</span>append(<span class="keyword">new</span> DeviceInfo(device)); setInfo(tr(<span class="string">"Low Energy device found. Scanning more..."</span>)); <span class="keyword">emit</span> devicesChanged(); } <span class="comment">//...</span> } <span class="type">void</span> DeviceFinder<span class="operator">::</span>scanError(<span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>Error error) { <span class="keyword">if</span> (error <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>PoweredOffError) setError(tr(<span class="string">"The Bluetooth adaptor is powered off."</span>)); <span class="keyword">else</span> <span class="keyword">if</span> (error <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qbluetoothdevicediscoveryagent.html">QBluetoothDeviceDiscoveryAgent</a></span><span class="operator">::</span>InputOutputError) setError(tr(<span class="string">"Writing or reading from the device resulted in an error."</span>)); <span class="keyword">else</span> setError(tr(<span class="string">"An unknown error has occurred."</span>)); } <span class="type">void</span> DeviceFinder<span class="operator">::</span>scanFinished() { <span class="preprocessor">#ifdef SIMULATOR</span> <span class="comment">// Only for testing</span> <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> <span class="number">4</span>; i<span class="operator">+</span><span class="operator">+</span>) m_devices<span class="operator">.</span>append(<span class="keyword">new</span> DeviceInfo(<span class="type"><a href="qbluetoothdeviceinfo.html">QBluetoothDeviceInfo</a></span>())); <span class="preprocessor">#endif</span> <span class="keyword">if</span> (m_devices<span class="operator">.</span>size() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>) setError(tr(<span class="string">"No Low Energy devices found."</span>)); <span class="keyword">else</span> setInfo(tr(<span class="string">"Scanning done."</span>)); <span class="keyword">emit</span> scanningChanged(); <span class="keyword">emit</span> devicesChanged(); } <span class="type">void</span> DeviceFinder<span class="operator">::</span>connectToService(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>address) { m_deviceDiscoveryAgent<span class="operator">-</span><span class="operator">></span>stop(); DeviceInfo <span class="operator">*</span>currentDevice <span class="operator">=</span> <span class="number">0</span>; <span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> m_devices<span class="operator">.</span>size(); i<span class="operator">+</span><span class="operator">+</span>) { <span class="keyword">if</span> (((DeviceInfo<span class="operator">*</span>)m_devices<span class="operator">.</span>at(i))<span class="operator">-</span><span class="operator">></span>getAddress() <span class="operator">=</span><span class="operator">=</span> address ) { currentDevice <span class="operator">=</span> (DeviceInfo<span class="operator">*</span>)m_devices<span class="operator">.</span>at(i); <span class="keyword">break</span>; } } <span class="keyword">if</span> (currentDevice) m_deviceHandler<span class="operator">-</span><span class="operator">></span>setDevice(currentDevice); clearMessages(); } bool DeviceFinder<span class="operator">::</span>scanning() <span class="keyword">const</span> { <span class="preprocessor">#ifdef SIMULATOR</span> <span class="keyword">return</span> m_demoTimer<span class="operator">.</span>isActive(); <span class="preprocessor">#else</span> <span class="keyword">return</span> m_deviceDiscoveryAgent<span class="operator">-</span><span class="operator">></span>isActive(); <span class="preprocessor">#endif</span> } <span class="type">QVariant</span> DeviceFinder<span class="operator">::</span>devices() { <span class="keyword">return</span> <span class="type">QVariant</span><span class="operator">::</span>fromValue(m_devices); } </pre> </div> <!-- @@@heartrate-game/devicefinder.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>