543 lines
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HTML
543 lines
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<h1 class="title">guitartunerui.cpp Example File</h1>
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<span class="small-subtitle">demos/mobile/guitartuner/src/guitartunerui.cpp</span>
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<!-- $$$demos/mobile/guitartuner/src/guitartunerui.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtDeclarative module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/</span>
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<span class="preprocessor">#include <QTimer></span>
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<span class="preprocessor">#include "guitartunerui.h"</span>
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<span class="preprocessor">#include "ui_guitartunerui.h"</span>
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GuitarTunerUI<span class="operator">::</span>GuitarTunerUI(<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>parent) :
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<span class="type"><a href="qwidget.html">QWidget</a></span>(parent)<span class="operator">,</span>
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ui(<span class="keyword">new</span> Ui<span class="operator">::</span>GuitarTunerUI)<span class="operator">,</span>
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m_maximumPrecision(<span class="number">0</span>)
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{
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ui<span class="operator">-</span><span class="operator">></span>setupUi(<span class="keyword">this</span>);
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<span class="comment">// Set up the class attributes to proper values.</span>
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m_outputActive <span class="operator">=</span> <span class="keyword">false</span>;
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m_muted <span class="operator">=</span> <span class="keyword">false</span>;
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m_outputVolumeLevel <span class="operator">=</span> getVolumeFromSoundSlider();
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m_inputVolumeLevel <span class="operator">=</span> <span class="number">1.0</span> <span class="operator">-</span> m_outputVolumeLevel;
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<span class="comment">// Set up the current tone, the frequency, and the name for it.</span>
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m_currentToneIndex <span class="operator">=</span> <span class="number">5</span>;
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updateFrequencyByToneIndex(m_currentToneIndex);
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<span class="comment">// Connect the signals from UI into proper slots.</span>
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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>
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SLOT(changeVolume()));
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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>
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SLOT(toggleSound(<span class="type">bool</span>)));
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connect(ui<span class="operator">-</span><span class="operator">></span>modeButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
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SLOT(toggleInputOrOutput()));
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connect(ui<span class="operator">-</span><span class="operator">></span>buttonNext<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(next()));
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connect(ui<span class="operator">-</span><span class="operator">></span>buttonPrev<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span> SLOT(prev()));
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<span class="comment">// Initialise up the UI by calling toggleInputOrOutput</span>
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<span class="comment">// for the first time.</span>
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toggleInputOrOutput();
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}
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GuitarTunerUI<span class="operator">::</span><span class="operator">~</span>GuitarTunerUI()
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{
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<span class="keyword">delete</span> ui;
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}
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<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)
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{
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<span class="type"><a href="qwidget.html">QWidget</a></span><span class="operator">::</span>changeEvent(e);
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<span class="keyword">switch</span> (e<span class="operator">-</span><span class="operator">></span>type()) {
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<span class="keyword">case</span> <span class="type"><a href="qevent.html">QEvent</a></span><span class="operator">::</span>LanguageChange:
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ui<span class="operator">-</span><span class="operator">></span>retranslateUi(<span class="keyword">this</span>);
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<span class="keyword">break</span>;
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<span class="keyword">default</span>:
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<span class="keyword">break</span>;
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}
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}
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<span class="comment">/**
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* Returns a value from 0 to 1, representing the volume.
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*/</span>
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<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> GuitarTunerUI<span class="operator">::</span>getVolumeFromSoundSlider() <span class="keyword">const</span>
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{
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<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();
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<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();
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}
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<span class="comment">/**
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* Updates the m_currentToneFrequency and m_currentToneString,
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* according to the given index. Also updates the UI.
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*/</span>
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<span class="type">void</span> GuitarTunerUI<span class="operator">::</span>updateFrequencyByToneIndex(<span class="type">int</span> index)
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{
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<span class="keyword">switch</span> (index) {
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<span class="keyword">case</span> <span class="number">0</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyE;
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m_currentToneString <span class="operator">=</span> <span class="string">"E"</span>;
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<span class="keyword">break</span>;
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}
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<span class="keyword">case</span> <span class="number">1</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyA;
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m_currentToneString <span class="operator">=</span> <span class="string">"A"</span>;
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<span class="keyword">break</span>;
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}
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<span class="keyword">case</span> <span class="number">2</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyD;
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m_currentToneString <span class="operator">=</span> <span class="string">"D"</span>;
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<span class="keyword">break</span>;
|
|
}
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<span class="keyword">case</span> <span class="number">3</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyG;
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m_currentToneString <span class="operator">=</span> <span class="string">"G"</span>;
|
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<span class="keyword">break</span>;
|
|
}
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|
<span class="keyword">case</span> <span class="number">4</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyB;
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m_currentToneString <span class="operator">=</span> <span class="string">"B"</span>;
|
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<span class="keyword">break</span>;
|
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}
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<span class="keyword">case</span> <span class="number">5</span>: {
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m_currentToneFrequency <span class="operator">=</span> FrequencyE2;
|
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m_currentToneString <span class="operator">=</span> <span class="string">"e"</span>;
|
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<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>
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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.
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|
*/</span>
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<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> 2015 The Qt Company Ltd.
|
|
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>
|
|
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. <a title="Privacy Policy"
|
|
href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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