652 lines
52 KiB
HTML
652 lines
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<h1 class="title">mainwidget.cpp Example File</h1>
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<span class="small-subtitle">demos/spectrum/app/mainwidget.cpp</span>
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<!-- $$$demos/spectrum/app/mainwidget.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 examples 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 "engine.h"</span>
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<span class="preprocessor">#include "levelmeter.h"</span>
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<span class="preprocessor">#include "mainwidget.h"</span>
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<span class="preprocessor">#include "waveform.h"</span>
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<span class="preprocessor">#include "progressbar.h"</span>
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<span class="preprocessor">#include "settingsdialog.h"</span>
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<span class="preprocessor">#include "spectrograph.h"</span>
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<span class="preprocessor">#include "tonegeneratordialog.h"</span>
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<span class="preprocessor">#include "utils.h"</span>
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<span class="preprocessor">#include <QLabel></span>
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<span class="preprocessor">#include <QPushButton></span>
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<span class="preprocessor">#include <QHBoxLayout></span>
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<span class="preprocessor">#include <QVBoxLayout></span>
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<span class="preprocessor">#include <QStyle></span>
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<span class="preprocessor">#include <QMenu></span>
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<span class="preprocessor">#include <QFileDialog></span>
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<span class="preprocessor">#include <QTimerEvent></span>
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<span class="preprocessor">#include <QMessageBox></span>
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<span class="keyword">const</span> <span class="type">int</span> NullTimerId <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
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MainWidget<span class="operator">::</span>MainWidget(<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)
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<span class="operator">,</span> m_mode(NoMode)
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<span class="operator">,</span> m_engine(<span class="keyword">new</span> Engine(<span class="keyword">this</span>))
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<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
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<span class="operator">,</span> m_waveform(<span class="keyword">new</span> Waveform(<span class="keyword">this</span>))
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<span class="preprocessor">#endif</span>
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<span class="operator">,</span> m_progressBar(<span class="keyword">new</span> ProgressBar(<span class="keyword">this</span>))
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<span class="operator">,</span> m_spectrograph(<span class="keyword">new</span> Spectrograph(<span class="keyword">this</span>))
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<span class="operator">,</span> m_levelMeter(<span class="keyword">new</span> LevelMeter(<span class="keyword">this</span>))
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<span class="operator">,</span> m_modeButton(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_recordButton(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_pauseButton(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_playButton(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_settingsButton(<span class="keyword">new</span> <span class="type"><a href="qpushbutton.html">QPushButton</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_infoMessage(<span class="keyword">new</span> <span class="type"><a href="qlabel.html">QLabel</a></span>(tr(<span class="string">"Select a mode to begin"</span>)<span class="operator">,</span> <span class="keyword">this</span>))
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<span class="operator">,</span> m_infoMessageTimerId(NullTimerId)
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<span class="operator">,</span> m_settingsDialog(<span class="keyword">new</span> SettingsDialog(
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m_engine<span class="operator">-</span><span class="operator">></span>availableAudioInputDevices()<span class="operator">,</span>
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m_engine<span class="operator">-</span><span class="operator">></span>availableAudioOutputDevices()<span class="operator">,</span>
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<span class="keyword">this</span>))
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<span class="operator">,</span> m_toneGeneratorDialog(<span class="keyword">new</span> ToneGeneratorDialog(<span class="keyword">this</span>))
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<span class="operator">,</span> m_modeMenu(<span class="keyword">new</span> <span class="type"><a href="qmenu.html">QMenu</a></span>(<span class="keyword">this</span>))
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<span class="operator">,</span> m_loadFileAction(<span class="number">0</span>)
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<span class="operator">,</span> m_generateToneAction(<span class="number">0</span>)
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<span class="operator">,</span> m_recordAction(<span class="number">0</span>)
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{
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m_spectrograph<span class="operator">-</span><span class="operator">></span>setParams(SpectrumNumBands<span class="operator">,</span> SpectrumLowFreq<span class="operator">,</span> SpectrumHighFreq);
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createUi();
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connectUi();
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}
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MainWidget<span class="operator">::</span><span class="operator">~</span>MainWidget()
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{
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}
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<span class="comment">//-----------------------------------------------------------------------------</span>
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<span class="comment">// Public slots</span>
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<span class="comment">//-----------------------------------------------------------------------------</span>
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<span class="type">void</span> MainWidget<span class="operator">::</span>stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>Mode mode<span class="operator">,</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State state)
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{
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Q_UNUSED(mode);
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updateButtonStates();
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<span class="keyword">if</span> (<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>ActiveState <span class="operator">!</span><span class="operator">=</span> state <span class="operator">&</span><span class="operator">&</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>SuspendedState <span class="operator">!</span><span class="operator">=</span> state) {
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m_levelMeter<span class="operator">-</span><span class="operator">></span>reset();
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m_spectrograph<span class="operator">-</span><span class="operator">></span>reset();
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}
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}
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<span class="type">void</span> MainWidget<span class="operator">::</span>formatChanged(<span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> <span class="operator">&</span>format)
|
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{
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infoMessage(formatToString(format)<span class="operator">,</span> NullMessageTimeout);
|
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|
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<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
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<span class="keyword">if</span> (<span class="type"><a href="qaudioformat.html">QAudioFormat</a></span>() <span class="operator">!</span><span class="operator">=</span> format) {
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m_waveform<span class="operator">-</span><span class="operator">></span>initialize(format<span class="operator">,</span> WaveformTileLength<span class="operator">,</span>
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WaveformWindowDuration);
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}
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<span class="preprocessor">#endif</span>
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}
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<span class="type">void</span> MainWidget<span class="operator">::</span>spectrumChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> position<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> length<span class="operator">,</span>
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<span class="keyword">const</span> FrequencySpectrum <span class="operator">&</span>spectrum)
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{
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m_progressBar<span class="operator">-</span><span class="operator">></span>windowChanged(position<span class="operator">,</span> length);
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m_spectrograph<span class="operator">-</span><span class="operator">></span>spectrumChanged(spectrum);
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}
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<span class="type">void</span> MainWidget<span class="operator">::</span>infoMessage(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>message<span class="operator">,</span> <span class="type">int</span> timeoutMs)
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{
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m_infoMessage<span class="operator">-</span><span class="operator">></span>setText(message);
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<span class="keyword">if</span> (NullTimerId <span class="operator">!</span><span class="operator">=</span> m_infoMessageTimerId) {
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killTimer(m_infoMessageTimerId);
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m_infoMessageTimerId <span class="operator">=</span> NullTimerId;
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}
|
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<span class="keyword">if</span> (NullMessageTimeout <span class="operator">!</span><span class="operator">=</span> timeoutMs)
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m_infoMessageTimerId <span class="operator">=</span> startTimer(timeoutMs);
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|
}
|
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<span class="type">void</span> MainWidget<span class="operator">::</span>errorMessage(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>heading<span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>detail)
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|
{
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|
<span class="preprocessor">#ifdef Q_OS_SYMBIAN</span>
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|
<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> message <span class="operator">=</span> heading <span class="operator">+</span> <span class="string">"\n"</span> <span class="operator">+</span> detail;
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|
<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> <span class="string">""</span><span class="operator">,</span> message<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Close);
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<span class="preprocessor">#else</span>
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<span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>warning(<span class="keyword">this</span><span class="operator">,</span> heading<span class="operator">,</span> detail<span class="operator">,</span> <span class="type"><a href="qmessagebox.html">QMessageBox</a></span><span class="operator">::</span>Close);
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|
<span class="preprocessor">#endif</span>
|
|
}
|
|
|
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<span class="type">void</span> MainWidget<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>event)
|
|
{
|
|
Q_ASSERT(event<span class="operator">-</span><span class="operator">></span>timerId() <span class="operator">=</span><span class="operator">=</span> m_infoMessageTimerId);
|
|
Q_UNUSED(event) <span class="comment">// suppress warnings in release builds</span>
|
|
killTimer(m_infoMessageTimerId);
|
|
m_infoMessageTimerId <span class="operator">=</span> NullTimerId;
|
|
m_infoMessage<span class="operator">-</span><span class="operator">></span>setText(<span class="string">""</span>);
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>audioPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> position)
|
|
{
|
|
<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
|
|
m_waveform<span class="operator">-</span><span class="operator">></span>audioPositionChanged(position);
|
|
<span class="preprocessor">#else</span>
|
|
Q_UNUSED(position)
|
|
<span class="preprocessor">#endif</span>
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>bufferLengthChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span> length)
|
|
{
|
|
m_progressBar<span class="operator">-</span><span class="operator">></span>bufferLengthChanged(length);
|
|
}
|
|
|
|
<span class="comment">//-----------------------------------------------------------------------------</span>
|
|
<span class="comment">// Private slots</span>
|
|
<span class="comment">//-----------------------------------------------------------------------------</span>
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>showFileDialog()
|
|
{
|
|
<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> dir;
|
|
<span class="keyword">const</span> <span class="type"><a href="qstringlist.html">QStringList</a></span> fileNames <span class="operator">=</span> <span class="type"><a href="qfiledialog.html">QFileDialog</a></span><span class="operator">::</span>getOpenFileNames(<span class="keyword">this</span><span class="operator">,</span> tr(<span class="string">"Open WAV file"</span>)<span class="operator">,</span> dir<span class="operator">,</span> <span class="string">"*.wav"</span>);
|
|
<span class="keyword">if</span> (fileNames<span class="operator">.</span>count()) {
|
|
reset();
|
|
setMode(LoadFileMode);
|
|
m_engine<span class="operator">-</span><span class="operator">></span>loadFile(fileNames<span class="operator">.</span>front());
|
|
updateButtonStates();
|
|
} <span class="keyword">else</span> {
|
|
updateModeMenu();
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>showSettingsDialog()
|
|
{
|
|
m_settingsDialog<span class="operator">-</span><span class="operator">></span>exec();
|
|
<span class="keyword">if</span> (m_settingsDialog<span class="operator">-</span><span class="operator">></span>result() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) {
|
|
m_engine<span class="operator">-</span><span class="operator">></span>setAudioInputDevice(m_settingsDialog<span class="operator">-</span><span class="operator">></span>inputDevice());
|
|
m_engine<span class="operator">-</span><span class="operator">></span>setAudioOutputDevice(m_settingsDialog<span class="operator">-</span><span class="operator">></span>outputDevice());
|
|
m_engine<span class="operator">-</span><span class="operator">></span>setWindowFunction(m_settingsDialog<span class="operator">-</span><span class="operator">></span>windowFunction());
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>showToneGeneratorDialog()
|
|
{
|
|
m_toneGeneratorDialog<span class="operator">-</span><span class="operator">></span>exec();
|
|
<span class="keyword">if</span> (m_toneGeneratorDialog<span class="operator">-</span><span class="operator">></span>result() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qdialog.html">QDialog</a></span><span class="operator">::</span>Accepted) {
|
|
reset();
|
|
setMode(GenerateToneMode);
|
|
<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> amplitude <span class="operator">=</span> m_toneGeneratorDialog<span class="operator">-</span><span class="operator">></span>amplitude();
|
|
<span class="keyword">if</span> (m_toneGeneratorDialog<span class="operator">-</span><span class="operator">></span>isFrequencySweepEnabled()) {
|
|
m_engine<span class="operator">-</span><span class="operator">></span>generateSweptTone(amplitude);
|
|
} <span class="keyword">else</span> {
|
|
<span class="keyword">const</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> frequency <span class="operator">=</span> m_toneGeneratorDialog<span class="operator">-</span><span class="operator">></span>frequency();
|
|
<span class="keyword">const</span> Tone tone(frequency<span class="operator">,</span> amplitude);
|
|
m_engine<span class="operator">-</span><span class="operator">></span>generateTone(tone);
|
|
updateButtonStates();
|
|
}
|
|
} <span class="keyword">else</span> {
|
|
updateModeMenu();
|
|
}
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>initializeRecord()
|
|
{
|
|
reset();
|
|
setMode(RecordMode);
|
|
<span class="keyword">if</span> (m_engine<span class="operator">-</span><span class="operator">></span>initializeRecord())
|
|
updateButtonStates();
|
|
}
|
|
|
|
<span class="comment">//-----------------------------------------------------------------------------</span>
|
|
<span class="comment">// Private functions</span>
|
|
<span class="comment">//-----------------------------------------------------------------------------</span>
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>createUi()
|
|
{
|
|
createMenus();
|
|
|
|
setWindowTitle(tr(<span class="string">"Spectrum Analyser"</span>));
|
|
|
|
<span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span> <span class="operator">*</span>windowLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qvboxlayout.html">QVBoxLayout</a></span>(<span class="keyword">this</span>);
|
|
|
|
m_infoMessage<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
m_infoMessage<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>AlignHCenter);
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_infoMessage);
|
|
|
|
<span class="preprocessor">#ifdef SUPERIMPOSE_PROGRESS_ON_WAVEFORM</span>
|
|
<span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">></span> waveformLayout(<span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>);
|
|
waveformLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_progressBar);
|
|
m_progressBar<span class="operator">-</span><span class="operator">></span>setMinimumHeight(m_waveform<span class="operator">-</span><span class="operator">></span>minimumHeight());
|
|
waveformLayout<span class="operator">-</span><span class="operator">></span>setMargin(<span class="number">0</span>);
|
|
m_waveform<span class="operator">-</span><span class="operator">></span>setLayout(waveformLayout<span class="operator">.</span>data());
|
|
waveformLayout<span class="operator">.</span>take();
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_waveform);
|
|
<span class="preprocessor">#else</span>
|
|
<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_waveform);
|
|
<span class="preprocessor">#endif // DISABLE_WAVEFORM</span>
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_progressBar);
|
|
<span class="preprocessor">#endif // SUPERIMPOSE_PROGRESS_ON_WAVEFORM</span>
|
|
|
|
<span class="comment">// Spectrograph and level meter</span>
|
|
|
|
<span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">></span> analysisLayout(<span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>);
|
|
analysisLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_spectrograph);
|
|
analysisLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_levelMeter);
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addLayout(analysisLayout<span class="operator">.</span>data());
|
|
analysisLayout<span class="operator">.</span>take();
|
|
|
|
<span class="comment">// Button panel</span>
|
|
|
|
<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> buttonSize(<span class="number">30</span><span class="operator">,</span> <span class="number">30</span>);
|
|
|
|
m_modeButton<span class="operator">-</span><span class="operator">></span>setText(tr(<span class="string">"Mode"</span>));
|
|
|
|
m_recordIcon <span class="operator">=</span> <span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/record.png"</span>);
|
|
m_recordButton<span class="operator">-</span><span class="operator">></span>setIcon(m_recordIcon);
|
|
m_recordButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
|
|
m_recordButton<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
m_recordButton<span class="operator">-</span><span class="operator">></span>setMinimumSize(buttonSize);
|
|
|
|
m_pauseIcon <span class="operator">=</span> style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPause);
|
|
m_pauseButton<span class="operator">-</span><span class="operator">></span>setIcon(m_pauseIcon);
|
|
m_pauseButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
|
|
m_pauseButton<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
m_pauseButton<span class="operator">-</span><span class="operator">></span>setMinimumSize(buttonSize);
|
|
|
|
m_playIcon <span class="operator">=</span> style()<span class="operator">-</span><span class="operator">></span>standardIcon(<span class="type"><a href="qstyle.html">QStyle</a></span><span class="operator">::</span>SP_MediaPlay);
|
|
m_playButton<span class="operator">-</span><span class="operator">></span>setIcon(m_playIcon);
|
|
m_playButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">false</span>);
|
|
m_playButton<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
m_playButton<span class="operator">-</span><span class="operator">></span>setMinimumSize(buttonSize);
|
|
|
|
m_settingsIcon <span class="operator">=</span> <span class="type"><a href="qicon.html">QIcon</a></span>(<span class="string">":/images/settings.png"</span>);
|
|
m_settingsButton<span class="operator">-</span><span class="operator">></span>setIcon(m_settingsIcon);
|
|
m_settingsButton<span class="operator">-</span><span class="operator">></span>setEnabled(<span class="keyword">true</span>);
|
|
m_settingsButton<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
m_settingsButton<span class="operator">-</span><span class="operator">></span>setMinimumSize(buttonSize);
|
|
|
|
<span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">></span> buttonPanelLayout(<span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>);
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addStretch();
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_modeButton);
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_recordButton);
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_pauseButton);
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_playButton);
|
|
buttonPanelLayout<span class="operator">-</span><span class="operator">></span>addWidget(m_settingsButton);
|
|
|
|
<span class="type"><a href="qwidget.html">QWidget</a></span> <span class="operator">*</span>buttonPanel <span class="operator">=</span> <span class="keyword">new</span> <span class="type"><a href="qwidget.html">QWidget</a></span>(<span class="keyword">this</span>);
|
|
buttonPanel<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type"><a href="qsizepolicy.html">QSizePolicy</a></span><span class="operator">::</span>Fixed);
|
|
buttonPanel<span class="operator">-</span><span class="operator">></span>setLayout(buttonPanelLayout<span class="operator">.</span>data());
|
|
buttonPanelLayout<span class="operator">.</span>take(); <span class="comment">// ownership transferred to buttonPanel</span>
|
|
|
|
<span class="type"><a href="qscopedpointer.html">QScopedPointer</a></span><span class="operator"><</span><span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span><span class="operator">></span> bottomPaneLayout(<span class="keyword">new</span> <span class="type"><a href="qhboxlayout.html">QHBoxLayout</a></span>);
|
|
bottomPaneLayout<span class="operator">-</span><span class="operator">></span>addWidget(buttonPanel);
|
|
windowLayout<span class="operator">-</span><span class="operator">></span>addLayout(bottomPaneLayout<span class="operator">.</span>data());
|
|
bottomPaneLayout<span class="operator">.</span>take(); <span class="comment">// ownership transferred to windowLayout</span>
|
|
|
|
<span class="comment">// Apply layout</span>
|
|
|
|
setLayout(windowLayout);
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>connectUi()
|
|
{
|
|
CHECKED_CONNECT(m_recordButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
|
|
m_engine<span class="operator">,</span> SLOT(startRecording()));
|
|
|
|
CHECKED_CONNECT(m_pauseButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
|
|
m_engine<span class="operator">,</span> SLOT(suspend()));
|
|
|
|
CHECKED_CONNECT(m_playButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
|
|
m_engine<span class="operator">,</span> SLOT(startPlayback()));
|
|
|
|
CHECKED_CONNECT(m_settingsButton<span class="operator">,</span> SIGNAL(clicked())<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(showSettingsDialog()));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>Mode<span class="operator">,</span><span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(stateChanged(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>Mode<span class="operator">,</span><span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>State)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(formatChanged(<span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> <span class="operator">&</span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(formatChanged(<span class="keyword">const</span> <span class="type"><a href="qaudioformat.html">QAudioFormat</a></span> <span class="operator">&</span>)));
|
|
|
|
m_progressBar<span class="operator">-</span><span class="operator">></span>bufferLengthChanged(m_engine<span class="operator">-</span><span class="operator">></span>bufferLength());
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(bufferLengthChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(bufferLengthChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(dataLengthChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(updateButtonStates()));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(recordPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
m_progressBar<span class="operator">,</span> SLOT(recordPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(playPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
m_progressBar<span class="operator">,</span> SLOT(playPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(recordPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(audioPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(playPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(audioPositionChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(levelChanged(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">,</span> <span class="type">int</span>))<span class="operator">,</span>
|
|
m_levelMeter<span class="operator">,</span> SLOT(levelChanged(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">,</span> <span class="type">int</span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(spectrumChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="keyword">const</span> FrequencySpectrum <span class="operator">&</span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(spectrumChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="keyword">const</span> FrequencySpectrum <span class="operator">&</span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(infoMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type">int</span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(infoMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type">int</span>)));
|
|
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(errorMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(errorMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type"><a href="qstring.html">QString</a></span>)));
|
|
|
|
CHECKED_CONNECT(m_spectrograph<span class="operator">,</span> SIGNAL(infoMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type">int</span>))<span class="operator">,</span>
|
|
<span class="keyword">this</span><span class="operator">,</span> SLOT(infoMessage(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">,</span> <span class="type">int</span>)));
|
|
|
|
<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
|
|
CHECKED_CONNECT(m_engine<span class="operator">,</span> SIGNAL(bufferChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> <span class="operator">&</span>))<span class="operator">,</span>
|
|
m_waveform<span class="operator">,</span> SLOT(bufferChanged(<span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qint64-typedef">qint64</a></span><span class="operator">,</span> <span class="keyword">const</span> <span class="type"><a href="qbytearray.html">QByteArray</a></span> <span class="operator">&</span>)));
|
|
<span class="preprocessor">#endif</span>
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>createMenus()
|
|
{
|
|
m_modeButton<span class="operator">-</span><span class="operator">></span>setMenu(m_modeMenu);
|
|
|
|
m_generateToneAction <span class="operator">=</span> m_modeMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Play generated tone"</span>));
|
|
m_recordAction <span class="operator">=</span> m_modeMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Record and play back"</span>));
|
|
m_loadFileAction <span class="operator">=</span> m_modeMenu<span class="operator">-</span><span class="operator">></span>addAction(tr(<span class="string">"Play file"</span>));
|
|
|
|
m_loadFileAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
|
|
m_generateToneAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
|
|
m_recordAction<span class="operator">-</span><span class="operator">></span>setCheckable(<span class="keyword">true</span>);
|
|
|
|
connect(m_loadFileAction<span class="operator">,</span> SIGNAL(triggered(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showFileDialog()));
|
|
connect(m_generateToneAction<span class="operator">,</span> SIGNAL(triggered(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(showToneGeneratorDialog()));
|
|
connect(m_recordAction<span class="operator">,</span> SIGNAL(triggered(<span class="type">bool</span>))<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> SLOT(initializeRecord()));
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>updateButtonStates()
|
|
{
|
|
<span class="keyword">const</span> <span class="type">bool</span> recordEnabled <span class="operator">=</span> ((<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>AudioOutput <span class="operator">=</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>mode() <span class="operator">|</span><span class="operator">|</span>
|
|
(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>ActiveState <span class="operator">!</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state() <span class="operator">&</span><span class="operator">&</span>
|
|
<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>IdleState <span class="operator">!</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state())) <span class="operator">&</span><span class="operator">&</span>
|
|
RecordMode <span class="operator">=</span><span class="operator">=</span> m_mode);
|
|
m_recordButton<span class="operator">-</span><span class="operator">></span>setEnabled(recordEnabled);
|
|
|
|
<span class="keyword">const</span> <span class="type">bool</span> pauseEnabled <span class="operator">=</span> (<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>ActiveState <span class="operator">=</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state() <span class="operator">|</span><span class="operator">|</span>
|
|
<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>IdleState <span class="operator">=</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state());
|
|
m_pauseButton<span class="operator">-</span><span class="operator">></span>setEnabled(pauseEnabled);
|
|
|
|
<span class="keyword">const</span> <span class="type">bool</span> playEnabled <span class="operator">=</span> (<span class="comment">/*m_engine->dataLength() &&*/</span>
|
|
(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>AudioOutput <span class="operator">!</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>mode() <span class="operator">|</span><span class="operator">|</span>
|
|
(<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>ActiveState <span class="operator">!</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state() <span class="operator">&</span><span class="operator">&</span>
|
|
<span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>IdleState <span class="operator">!</span><span class="operator">=</span> m_engine<span class="operator">-</span><span class="operator">></span>state())));
|
|
m_playButton<span class="operator">-</span><span class="operator">></span>setEnabled(playEnabled);
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span><a href="qtextstream.html#reset">reset</a>()
|
|
{
|
|
<span class="preprocessor">#ifndef DISABLE_WAVEFORM</span>
|
|
m_waveform<span class="operator">-</span><span class="operator">></span>reset();
|
|
<span class="preprocessor">#endif</span>
|
|
m_engine<span class="operator">-</span><span class="operator">></span>reset();
|
|
m_levelMeter<span class="operator">-</span><span class="operator">></span>reset();
|
|
m_spectrograph<span class="operator">-</span><span class="operator">></span>reset();
|
|
m_progressBar<span class="operator">-</span><span class="operator">></span>reset();
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>setMode(Mode mode)
|
|
{
|
|
m_mode <span class="operator">=</span> mode;
|
|
updateModeMenu();
|
|
}
|
|
|
|
<span class="type">void</span> MainWidget<span class="operator">::</span>updateModeMenu()
|
|
{
|
|
m_loadFileAction<span class="operator">-</span><span class="operator">></span>setChecked(LoadFileMode <span class="operator">=</span><span class="operator">=</span> m_mode);
|
|
m_generateToneAction<span class="operator">-</span><span class="operator">></span>setChecked(GenerateToneMode <span class="operator">=</span><span class="operator">=</span> m_mode);
|
|
m_recordAction<span class="operator">-</span><span class="operator">></span>setChecked(RecordMode <span class="operator">=</span><span class="operator">=</span> m_mode);
|
|
}</pre>
|
|
</div>
|
|
<!-- @@@demos/spectrum/app/mainwidget.cpp -->
|
|
</div>
|
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|
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|
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<span></span>
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<p>
|
|
<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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<br />
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<p>
|
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The documentation provided herein is licensed under the terms of the
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
|
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License version 1.3</a> as published by the Free Software Foundation.</p>
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<p>
|
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
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www.qt-project.org</a>.</p>
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<br />
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<p>
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Qt and respective logos are trademarks of The Qt Company Ltd
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in Finland and/or other countries worldwide. All other trademarks are property
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href="http://en.gitorious.org/privacy_policy/">Privacy Policy</a></p>
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