<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>mainwidget.cpp Example File | Qt Multimedia 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtmultimedia-index.html">Qt Multimedia</a></td><td ><a href="qtmultimedia-multimedia-spectrum-example.html">Spectrum Example</a></td><td >mainwidget.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtmultimedia-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">mainwidget.cpp Example File</h1> <span class="subtitle">multimedia/spectrum/app/mainwidget.cpp</span> <!-- $$$multimedia/spectrum/app/mainwidget.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, you may use this file under the terms of the BSD license ** as follows: ** ** "Redistribution and use in source and binary forms, with or without ** modification, are permitted provided that the following conditions are ** met: ** * Redistributions of source code must retain the above copyright ** notice, this list of conditions and the following disclaimer. ** * Redistributions in binary form must reproduce the above copyright ** notice, this list of conditions and the following disclaimer in ** the documentation and/or other materials provided with the ** distribution. ** * Neither the name of The Qt Company Ltd nor the names of its ** contributors may be used to endorse or promote products derived ** from this software without specific prior written permission. ** ** ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "engine.h"</span> <span class="preprocessor">#include "levelmeter.h"</span> <span class="preprocessor">#include "mainwidget.h"</span> <span class="preprocessor">#include "waveform.h"</span> <span class="preprocessor">#include "progressbar.h"</span> <span class="preprocessor">#include "settingsdialog.h"</span> <span class="preprocessor">#include "spectrograph.h"</span> <span class="preprocessor">#include "tonegeneratordialog.h"</span> <span class="preprocessor">#include "utils.h"</span> <span class="preprocessor">#include <QLabel></span> <span class="preprocessor">#include <QPushButton></span> <span class="preprocessor">#include <QHBoxLayout></span> <span class="preprocessor">#include <QVBoxLayout></span> <span class="preprocessor">#include <QStyle></span> <span class="preprocessor">#include <QMenu></span> <span class="preprocessor">#include <QFileDialog></span> <span class="preprocessor">#include <QTimerEvent></span> <span class="preprocessor">#include <QMessageBox></span> <span class="keyword">const</span> <span class="type">int</span> NullTimerId <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>; MainWidget<span class="operator">::</span>MainWidget(<span class="type">QWidget</span> <span class="operator">*</span>parent) : <span class="type">QWidget</span>(parent) <span class="operator">,</span> m_mode(NoMode) <span class="operator">,</span> m_engine(<span class="keyword">new</span> Engine(<span class="keyword">this</span>)) <span class="preprocessor">#ifndef DISABLE_WAVEFORM</span> <span class="operator">,</span> m_waveform(<span class="keyword">new</span> Waveform(<span class="keyword">this</span>)) <span class="preprocessor">#endif</span> <span class="operator">,</span> m_progressBar(<span class="keyword">new</span> ProgressBar(<span class="keyword">this</span>)) <span class="operator">,</span> m_spectrograph(<span class="keyword">new</span> Spectrograph(<span class="keyword">this</span>)) <span class="operator">,</span> m_levelMeter(<span class="keyword">new</span> LevelMeter(<span class="keyword">this</span>)) <span class="operator">,</span> m_modeButton(<span class="keyword">new</span> <span class="type">QPushButton</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_recordButton(<span class="keyword">new</span> <span class="type">QPushButton</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_pauseButton(<span class="keyword">new</span> <span class="type">QPushButton</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_playButton(<span class="keyword">new</span> <span class="type">QPushButton</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_settingsButton(<span class="keyword">new</span> <span class="type">QPushButton</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_infoMessage(<span class="keyword">new</span> <span class="type">QLabel</span>(tr(<span class="string">"Select a mode to begin"</span>)<span class="operator">,</span> <span class="keyword">this</span>)) <span class="operator">,</span> m_infoMessageTimerId(NullTimerId) <span class="operator">,</span> m_settingsDialog(<span class="keyword">new</span> SettingsDialog( m_engine<span class="operator">-</span><span class="operator">></span>availableAudioInputDevices()<span class="operator">,</span> m_engine<span class="operator">-</span><span class="operator">></span>availableAudioOutputDevices()<span class="operator">,</span> <span class="keyword">this</span>)) <span class="operator">,</span> m_toneGeneratorDialog(<span class="keyword">new</span> ToneGeneratorDialog(<span class="keyword">this</span>)) <span class="operator">,</span> m_modeMenu(<span class="keyword">new</span> <span class="type">QMenu</span>(<span class="keyword">this</span>)) <span class="operator">,</span> m_loadFileAction(<span class="number">0</span>) <span class="operator">,</span> m_generateToneAction(<span class="number">0</span>) <span class="operator">,</span> m_recordAction(<span class="number">0</span>) { m_spectrograph<span class="operator">-</span><span class="operator">></span>setParams(SpectrumNumBands<span class="operator">,</span> SpectrumLowFreq<span class="operator">,</span> SpectrumHighFreq); createUi(); connectUi(); } MainWidget<span class="operator">::</span><span class="operator">~</span>MainWidget() { } <span class="comment">//-----------------------------------------------------------------------------</span> <span class="comment">// Public slots</span> <span class="comment">//-----------------------------------------------------------------------------</span> <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) { Q_UNUSED(mode); updateButtonStates(); <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 <span class="operator">&</span><span class="operator">&</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>InterruptedState <span class="operator">!</span><span class="operator">=</span> state) { m_levelMeter<span class="operator">-</span><span class="operator">></span>reset(); m_spectrograph<span class="operator">-</span><span class="operator">></span>reset(); } } <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) { infoMessage(formatToString(format)<span class="operator">,</span> NullMessageTimeout); <span class="preprocessor">#ifndef DISABLE_WAVEFORM</span> <span class="keyword">if</span> (<span class="type"><a href="qaudioformat.html">QAudioFormat</a></span>() <span class="operator">!</span><span class="operator">=</span> format) { m_waveform<span class="operator">-</span><span class="operator">></span>initialize(format<span class="operator">,</span> WaveformTileLength<span class="operator">,</span> WaveformWindowDuration); } <span class="preprocessor">#endif</span> } <span class="type">void</span> MainWidget<span class="operator">::</span>spectrumChanged(<span class="type">qint64</span> position<span class="operator">,</span> <span class="type">qint64</span> length<span class="operator">,</span> <span class="keyword">const</span> FrequencySpectrum <span class="operator">&</span>spectrum) { m_progressBar<span class="operator">-</span><span class="operator">></span>windowChanged(position<span class="operator">,</span> length); m_spectrograph<span class="operator">-</span><span class="operator">></span>spectrumChanged(spectrum); } <span class="type">void</span> MainWidget<span class="operator">::</span>infoMessage(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>message<span class="operator">,</span> <span class="type">int</span> timeoutMs) { m_infoMessage<span class="operator">-</span><span class="operator">></span>setText(message); <span class="keyword">if</span> (NullTimerId <span class="operator">!</span><span class="operator">=</span> m_infoMessageTimerId) { killTimer(m_infoMessageTimerId); m_infoMessageTimerId <span class="operator">=</span> NullTimerId; } <span class="keyword">if</span> (NullMessageTimeout <span class="operator">!</span><span class="operator">=</span> timeoutMs) m_infoMessageTimerId <span class="operator">=</span> startTimer(timeoutMs); } <span class="type">void</span> MainWidget<span class="operator">::</span>errorMessage(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>heading<span class="operator">,</span> <span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>detail) { <span class="type">QMessageBox</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">QMessageBox</span><span class="operator">::</span>Close); } <span class="type">void</span> MainWidget<span class="operator">::</span>timerEvent(<span class="type">QTimerEvent</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">qint64</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">qint64</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">QString</span> dir; <span class="keyword">const</span> <span class="type">QStringList</span> fileNames <span class="operator">=</span> <span class="type">QFileDialog</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">QDialog</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">QDialog</span><span class="operator">::</span>Accepted) { reset(); setMode(GenerateToneMode); <span class="keyword">const</span> <span class="type">qreal</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">qreal</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">QVBoxLayout</span> <span class="operator">*</span>windowLayout <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QVBoxLayout</span>(<span class="keyword">this</span>); m_infoMessage<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type">QSizePolicy</span><span class="operator">::</span>Preferred<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Fixed); m_infoMessage<span class="operator">-</span><span class="operator">></span>setAlignment(<span class="type">Qt</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">QScopedPointer</span><span class="operator"><</span><span class="type">QHBoxLayout</span><span class="operator">></span> waveformLayout(<span class="keyword">new</span> <span class="type">QHBoxLayout</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">QScopedPointer</span><span class="operator"><</span><span class="type">QHBoxLayout</span><span class="operator">></span> analysisLayout(<span class="keyword">new</span> <span class="type">QHBoxLayout</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">QSize</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">QIcon</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">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</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">QStyle</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">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</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">QStyle</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">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</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">QIcon</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">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</span><span class="operator">::</span>Fixed); m_settingsButton<span class="operator">-</span><span class="operator">></span>setMinimumSize(buttonSize); <span class="type">QScopedPointer</span><span class="operator"><</span><span class="type">QHBoxLayout</span><span class="operator">></span> buttonPanelLayout(<span class="keyword">new</span> <span class="type">QHBoxLayout</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">QWidget</span> <span class="operator">*</span>buttonPanel <span class="operator">=</span> <span class="keyword">new</span> <span class="type">QWidget</span>(<span class="keyword">this</span>); buttonPanel<span class="operator">-</span><span class="operator">></span>setSizePolicy(<span class="type">QSizePolicy</span><span class="operator">::</span>Fixed<span class="operator">,</span> <span class="type">QSizePolicy</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">QScopedPointer</span><span class="operator"><</span><span class="type">QHBoxLayout</span><span class="operator">></span> bottomPaneLayout(<span class="keyword">new</span> <span class="type">QHBoxLayout</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() { connect(m_recordButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>startRecording); connect(m_pauseButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>suspend); connect(m_playButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>startPlayback); connect(m_settingsButton<span class="operator">,</span> <span class="operator">&</span><span class="type">QPushButton</span><span class="operator">::</span>clicked<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>showSettingsDialog); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>stateChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>stateChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>formatChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>formatChanged); m_progressBar<span class="operator">-</span><span class="operator">></span>bufferLengthChanged(m_engine<span class="operator">-</span><span class="operator">></span>bufferLength()); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>bufferLengthChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>bufferLengthChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>dataLengthChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>updateButtonStates); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>recordPositionChanged<span class="operator">,</span> m_progressBar<span class="operator">,</span> <span class="operator">&</span>ProgressBar<span class="operator">::</span>recordPositionChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>playPositionChanged<span class="operator">,</span> m_progressBar<span class="operator">,</span> <span class="operator">&</span>ProgressBar<span class="operator">::</span>playPositionChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>recordPositionChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>audioPositionChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>playPositionChanged<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>audioPositionChanged); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>levelChanged<span class="operator">,</span> m_levelMeter<span class="operator">,</span> <span class="operator">&</span>LevelMeter<span class="operator">::</span>levelChanged); connect(m_engine<span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type">qint64</span><span class="operator">,</span> <span class="type">qint64</span><span class="operator">,</span> <span class="keyword">const</span> FrequencySpectrum<span class="operator">&</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span>Engine<span class="operator">::</span>spectrumChanged)<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="type">QOverload</span><span class="operator"><</span><span class="type">qint64</span><span class="operator">,</span> <span class="type">qint64</span><span class="operator">,</span> <span class="keyword">const</span> FrequencySpectrum<span class="operator">&</span><span class="operator">></span><span class="operator">::</span>of(<span class="operator">&</span>MainWidget<span class="operator">::</span>spectrumChanged)); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>infoMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>infoMessage); connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>errorMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>errorMessage); connect(m_spectrograph<span class="operator">,</span> <span class="operator">&</span>Spectrograph<span class="operator">::</span>infoMessage<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>infoMessage); <span class="preprocessor">#ifndef DISABLE_WAVEFORM</span> connect(m_engine<span class="operator">,</span> <span class="operator">&</span>Engine<span class="operator">::</span>bufferChanged<span class="operator">,</span> m_waveform<span class="operator">,</span> <span class="operator">&</span>Waveform<span class="operator">::</span>bufferChanged); <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> <span class="operator">&</span><span class="type">QAction</span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>showFileDialog); connect(m_generateToneAction<span class="operator">,</span> <span class="operator">&</span><span class="type">QAction</span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>showToneGeneratorDialog); connect(m_recordAction<span class="operator">,</span> <span class="operator">&</span><span class="type">QAction</span><span class="operator">::</span>triggered<span class="operator">,</span> <span class="keyword">this</span><span class="operator">,</span> <span class="operator">&</span>MainWidget<span class="operator">::</span>initializeRecord); } <span class="type">void</span> MainWidget<span class="operator">::</span>updateButtonStates() { <span class="keyword">const</span> bool 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> bool 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> bool 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() <span class="operator">&</span><span class="operator">&</span> <span class="type"><a href="qaudio.html">QAudio</a></span><span class="operator">::</span>InterruptedState <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>reset() { <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> <!-- @@@multimedia/spectrum/app/mainwidget.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>