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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">guitartunerui.cpp Example File</h1> <span class="small-subtitle">demos/mobile/guitartuner/src/guitartunerui.cpp</span> <!-- $$$demos/mobile/guitartuner/src/guitartunerui.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the QtDeclarative module of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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 Digia Plc and its Subsidiary(-ies) 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 <QTimer></span> <span class="preprocessor">#include "guitartunerui.h"</span> <span class="preprocessor">#include "ui_guitartunerui.h"</span> GuitarTunerUI<span class="operator">::</span>GuitarTunerUI(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span> ui(<span class="keyword">new</span> Ui<span class="operator">::</span>GuitarTunerUI)<span class="operator">,</span> m_maximumPrecision(<span class="number">0</span>) { ui<span class="operator">-</span><span class="operator">></span>setupUi(<span class="keyword">this</span>); <span class="comment">// Set up the class attributes to proper values.</span> m_outputActive <span class="operator">=</span> <span class="keyword">false</span>; m_muted <span class="operator">=</span> <span class="keyword">false</span>; m_outputVolumeLevel <span class="operator">=</span> getVolumeFromSoundSlider(); m_inputVolumeLevel <span class="operator">=</span> <span class="number">1.0</span> <span class="operator">-</span> m_outputVolumeLevel; <span class="comment">// Set up the current tone, the frequency, and the name for it.</span> m_currentToneIndex <span class="operator">=</span> <span class="number">5</span>; updateFrequencyByToneIndex(m_currentToneIndex); <span class="comment">// Connect the signals from UI into proper slots.</span> connect(ui<span class="operator">-</span><span class="operator">></span>soundSlider<span class="operator">,</span> SIGNAL(valueChanged(<span class="type">int</span>))<span class="operator">,</span> SLOT(changeVolume())); connect(ui<span class="operator">-</span><span class="operator">></span>soundButton<span class="operator">,</span> SIGNAL(toggled(<span class="type">bool</span>))<span class="operator">,</span> SLOT(toggleSound(<span class="type">bool</span>))); connect(ui<span class="operator">-</span><span class="operator">></span>modeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(toggleInputOrOutput())); connect(ui<span class="operator">-</span><span class="operator">></span>buttonNext<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(next())); connect(ui<span class="operator">-</span><span class="operator">></span>buttonPrev<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(prev())); <span class="comment">// Initialise up the UI by calling toggleInputOrOutput</span> <span class="comment">// for the first time.</span> toggleInputOrOutput(); } GuitarTunerUI<span class="operator">::</span><span class="operator">~</span>GuitarTunerUI() { <span class="keyword">delete</span> ui; } <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>changeEvent(<span class="type"><a href="qevent.html">QEvent</a></span> <span class="operator">*</span>e) { <span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>changeEvent(e); <span class="keyword">switch</span> (e<span class="operator">-</span><span class="operator">></span>type()) { <span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>LanguageChange: ui<span class="operator">-</span><span class="operator">></span>retranslateUi(<span class="keyword">this</span>); <span class="keyword">break</span>; <span class="keyword">default</span>: <span class="keyword">break</span>; } } <span class="comment">/** * Returns a value from 0 to 1, representing the volume. */</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GuitarTunerUI<span class="operator">::</span>getVolumeFromSoundSlider() <span class="keyword">const</span> { <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> value <span class="operator">=</span> ui<span class="operator">-</span><span class="operator">></span>soundSlider<span class="operator">-</span><span class="operator">></span>value(); <span class="keyword">return</span> value<span class="operator">/</span>ui<span class="operator">-</span><span class="operator">></span>soundSlider<span class="operator">-</span><span class="operator">></span>maximum(); } <span class="comment">/** * Updates the m_currentToneFrequency and m_currentToneString, * according to the given index. Also updates the UI. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>updateFrequencyByToneIndex(<span class="type">int</span> index) { <span class="keyword">switch</span> (index) { <span class="keyword">case</span> <span class="number">0</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyE; m_currentToneString <span class="operator">=</span> <span class="string">"E"</span>; <span class="keyword">break</span>; } <span class="keyword">case</span> <span class="number">1</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyA; m_currentToneString <span class="operator">=</span> <span class="string">"A"</span>; <span class="keyword">break</span>; } <span class="keyword">case</span> <span class="number">2</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyD; m_currentToneString <span class="operator">=</span> <span class="string">"D"</span>; <span class="keyword">break</span>; } <span class="keyword">case</span> <span class="number">3</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyG; m_currentToneString <span class="operator">=</span> <span class="string">"G"</span>; <span class="keyword">break</span>; } <span class="keyword">case</span> <span class="number">4</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyB; m_currentToneString <span class="operator">=</span> <span class="string">"B"</span>; <span class="keyword">break</span>; } <span class="keyword">case</span> <span class="number">5</span>: { m_currentToneFrequency <span class="operator">=</span> FrequencyE2; m_currentToneString <span class="operator">=</span> <span class="string">"e"</span>; <span class="keyword">break</span>; } <span class="keyword">default</span>: { <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"invalid index!"</span> <span class="operator"><</span><span class="operator"><</span> index; } } <span class="comment">// Set the noteLabel text according to the current tone.</span> ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>setText(m_currentToneString); } <span class="comment">/** * Returns the volume. */</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GuitarTunerUI<span class="operator">::</span>getVolume() <span class="keyword">const</span> { <span class="keyword">return</span> m_outputVolumeLevel; } <span class="comment">/** * Returns true if the sound is muted. */</span> <span class="type">bool</span> GuitarTunerUI<span class="operator">::</span>getMuteState() <span class="keyword">const</span> { <span class="keyword">return</span> m_muted; } <span class="comment">/** * Returns the microphone sensitivity. */</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GuitarTunerUI<span class="operator">::</span>getMicrophoneSensitivity() <span class="keyword">const</span> { <span class="keyword">return</span> m_inputVolumeLevel; } <span class="comment">/** * Returns whether the input mode is active. */</span> <span class="type">bool</span> GuitarTunerUI<span class="operator">::</span>isInputModeActive() <span class="keyword">const</span> { <span class="keyword">return</span> <span class="operator">!</span>m_outputActive; } <span class="comment">/** * Returns the current target frequency. */</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GuitarTunerUI<span class="operator">::</span>getFrequency() <span class="keyword">const</span> { <span class="keyword">return</span> m_currentToneFrequency; } <span class="comment">/** * Toggles the sound according to the parameter. * Has no effect if output is not active. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>toggleSound(<span class="type">bool</span> noSound) { <span class="keyword">if</span> (<span class="operator">!</span>m_outputActive) { <span class="keyword">return</span>; } m_muted <span class="operator">=</span> noSound; <span class="keyword">emit</span> muteChanged(m_muted); } <span class="comment">/** * Changes the volume or microphone sensitivity. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>changeVolume() { <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> resultingAmplitude <span class="operator">=</span> getVolumeFromSoundSlider(); <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"resultingAmplitude"</span> <span class="operator"><</span><span class="operator"><</span> resultingAmplitude; <span class="keyword">if</span> (m_outputActive) { m_outputVolumeLevel <span class="operator">=</span> resultingAmplitude; <span class="keyword">emit</span> volumeChanged(resultingAmplitude); } <span class="keyword">else</span> { m_inputVolumeLevel <span class="operator">=</span> resultingAmplitude; <span class="keyword">emit</span> microphoneSensitivityChanged(<span class="number">1.0</span><span class="operator">-</span>resultingAmplitude); } } <span class="comment">/** * Toggles input or output, depending of the current state. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>toggleInputOrOutput() { <span class="comment">// If output mode is active:</span> <span class="keyword">if</span> (m_outputActive) { <span class="comment">// Change UI to correspond to the input mode.</span> m_outputActive <span class="operator">=</span> <span class="keyword">false</span>; ui<span class="operator">-</span><span class="operator">></span>soundSlider<span class="operator">-</span><span class="operator">></span>setValue(m_inputVolumeLevel<span class="operator">*</span><span class="number">100</span>); ui<span class="operator">-</span><span class="operator">></span>soundButton<span class="operator">-</span><span class="operator">></span>setDisabled(<span class="keyword">true</span>); ui<span class="operator">-</span><span class="operator">></span>soundButton<span class="operator">-</span><span class="operator">></span>hide(); ui<span class="operator">-</span><span class="operator">></span>micSensitivityLabel<span class="operator">-</span><span class="operator">></span>show(); <span class="keyword">emit</span> modeChanged(<span class="keyword">true</span>); ui<span class="operator">-</span><span class="operator">></span>modeButton<span class="operator">-</span><span class="operator">></span>setText(<span class="string">"To tone mode"</span>); } <span class="comment">// Else:</span> <span class="keyword">else</span> { <span class="comment">// Change UI to correspond to the output mode.</span> m_outputActive <span class="operator">=</span> <span class="keyword">true</span>; ui<span class="operator">-</span><span class="operator">></span>soundSlider<span class="operator">-</span><span class="operator">></span>setValue(m_outputVolumeLevel<span class="operator">*</span><span class="number">100</span>); ui<span class="operator">-</span><span class="operator">></span>soundButton<span class="operator">-</span><span class="operator">></span>setDisabled(<span class="keyword">false</span>); ui<span class="operator">-</span><span class="operator">></span>micSensitivityLabel<span class="operator">-</span><span class="operator">></span>hide(); ui<span class="operator">-</span><span class="operator">></span>soundButton<span class="operator">-</span><span class="operator">></span>show(); <span class="keyword">emit</span> modeChanged(<span class="keyword">false</span>); ui<span class="operator">-</span><span class="operator">></span>modeButton<span class="operator">-</span><span class="operator">></span>setText(<span class="string">"To listen mode"</span>); } } <span class="comment">/** * Receives the low voice signal. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>lowVoice() { <span class="keyword">if</span> (ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>font()<span class="operator">.</span>bold()) { <span class="type"><a href="qfont.html">QFont</a></span> font; font<span class="operator">.</span>setBold(<span class="keyword">false</span>); font<span class="operator">.</span>setUnderline(<span class="keyword">false</span>); ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>setFont(font); } } <span class="comment">/** * Receives the voice difference signal. * The difference is qreal, where increase of 1 corresponds * to increase of 1 tone to the target frequency. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>voiceDifference(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> difference) { <span class="keyword">if</span> (ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>font()<span class="operator">.</span>bold()) { <span class="type"><a href="qfont.html">QFont</a></span> font; font<span class="operator">.</span>setBold(<span class="keyword">false</span>); font<span class="operator">.</span>setUnderline(<span class="keyword">false</span>); ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>setFont(font); } ui<span class="operator">-</span><span class="operator">></span>correctSoundSlider<span class="operator">-</span><span class="operator">></span>setValue(difference<span class="operator">*</span>m_maximumPrecision); } <span class="comment">/** * Receives the correct frequency signal. * Makes the UI to visualize correct frequency event. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>correctFrequencyObtained() { <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"CORRECT FREQUENCY"</span>; <span class="type"><a href="qfont.html">QFont</a></span> font; font<span class="operator">.</span>setBold(<span class="keyword">true</span>); font<span class="operator">.</span>setUnderline(<span class="keyword">true</span>); ui<span class="operator">-</span><span class="operator">></span>noteLabel<span class="operator">-</span><span class="operator">></span>setFont(font); } <span class="comment">/** * Sets up the maximum voice difference. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>setMaximumVoiceDifference(<span class="type">int</span> max) { <span class="comment">// Assert that the maximum precision is known.</span> Q_ASSERT(m_maximumPrecision <span class="operator">!</span><span class="operator">=</span> <span class="number">0</span>); <span class="comment">// Set the maximum and minimum values of the correctSoundSlider</span> <span class="comment">// to the +- max*m_maximumPrecision, and set the tick interval</span> <span class="comment">// to be m_maximumPrecision.</span> ui<span class="operator">-</span><span class="operator">></span>correctSoundSlider<span class="operator">-</span><span class="operator">></span>setMaximum(max<span class="operator">*</span>m_maximumPrecision); ui<span class="operator">-</span><span class="operator">></span>correctSoundSlider<span class="operator">-</span><span class="operator">></span>setMinimum(<span class="operator">-</span>max<span class="operator">*</span>m_maximumPrecision); ui<span class="operator">-</span><span class="operator">></span>correctSoundSlider<span class="operator">-</span><span class="operator">></span>setTickInterval(max<span class="operator">*</span>m_maximumPrecision); } <span class="comment">/** * Stores the maximum precision per note. Used to setup the * correct sound slider. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>setMaximumPrecisionPerNote(<span class="type">int</span> max) { m_maximumPrecision <span class="operator">=</span> max; } <span class="comment">/** * Changes the tone to the next value. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>next() { changeTone((m_currentToneIndex <span class="operator">+</span> <span class="number">1</span>) <span class="operator">%</span> <span class="number">6</span>); } <span class="comment">/** * Changes the tone to the previous value. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>prev() { changeTone((m_currentToneIndex <span class="operator">+</span> <span class="number">5</span>) <span class="operator">%</span> <span class="number">6</span>); } <span class="comment">/** * Changes the tone according to the new index. */</span> <span class="type">void</span> GuitarTunerUI<span class="operator">::</span>changeTone(<span class="type">int</span> newIndex) { m_currentToneIndex <span class="operator">=</span> newIndex; updateFrequencyByToneIndex(m_currentToneIndex); <a href="qtglobal.html#qDebug">qDebug</a>() <span class="operator"><</span><span class="operator"><</span> <span class="string">"targetFrequencyChanged"</span> <span class="operator"><</span><span class="operator"><</span> m_currentToneFrequency; <span class="keyword">emit</span> targetFrequencyChanged(m_currentToneFrequency); }</pre> </div> <!-- @@@demos/mobile/guitartuner/src/guitartunerui.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its subsidiaries. Documentation contributions included herein are the copyrights of their respective owners.</p> <br /> <p> 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.</p> <p> Documentation sources may be obtained from <a href="http://www.qt-project.org"> www.qt-project.org</a>.</p> <br /> <p> Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. <a title="Privacy Policy" href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p> </div> <script src="scripts/functions.js" type="text/javascript"></script> </body> </html>