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Diffstat (limited to 'tests/manual/spectrum/spectrumapp/main.cpp')
| -rw-r--r-- | tests/manual/spectrum/spectrumapp/main.cpp | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/tests/manual/spectrum/spectrumapp/main.cpp b/tests/manual/spectrum/spectrumapp/main.cpp new file mode 100644 index 00000000..e9548b4e --- /dev/null +++ b/tests/manual/spectrum/spectrumapp/main.cpp @@ -0,0 +1,212 @@ +/****************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the Qt Data Visualization module. +** +** $QT_BEGIN_LICENSE:COMM$ +** +** 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 http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** $QT_END_LICENSE$ +** +******************************************************************************/ + +#include "engine.h" +#include "utils.h" + +#include <QtDataVisualization/q3dbars.h> +#include <QtDataVisualization/qbardataproxy.h> +#include <QtDataVisualization/qvalue3daxis.h> +#include <QtDataVisualization/qcategory3daxis.h> +#include <QtDataVisualization/q3dscene.h> +#include <QtDataVisualization/q3dcamera.h> +#include <QtDataVisualization/qbar3dseries.h> +#include <QtDataVisualization/q3dtheme.h> + +#include <QGuiApplication> +#include <QAudio> +#include <QTimer> + +//#define USE_CONES + +using namespace QtDataVisualization; + +class MainApp : public QObject +{ +public: + MainApp(Q3DBars *window); + ~MainApp(); + + void start(QString fileName); + +public slots: + void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum); + void stateChanged(QAudio::Mode mode, QAudio::State state); + +private slots: + void restart(); + +private: + int barIndex(qreal frequency) const; + +private: + Q3DBars *m_chart; + Engine *m_engine; + QTimer *m_restartTimer; + // Lower bound of first band in the spectrum in Hz + qreal m_lowFreq; + // Upper band of last band in the spectrum in Hz + qreal m_highFreq; +}; + +MainApp::MainApp(Q3DBars *window) + : m_chart(window), + m_engine(new Engine(this)), + m_restartTimer(new QTimer(this)), + m_lowFreq(SpectrumLowFreq), + m_highFreq(SpectrumHighFreq) +{ + m_chart->rowAxis()->setMax(SpectrumNumBands * 2); + m_chart->columnAxis()->setMax(SpectrumNumBands - 1); + // Disable grid + m_chart->activeTheme()->setGridEnabled(false); + // Disable auto-scaling of height by defining explicit range + m_chart->valueAxis()->setRange(0.0f, 1.0f); + // Disable shadows + m_chart->setShadowQuality(QAbstract3DGraph::ShadowQualityNone); +#if USE_CONES + // Set bar specifications; make them a bit wider than deep and make them be drawn 75% + // inside each other + m_chart->setBarThickness(1.25); + m_chart->setBarSpacing(QSizeF(0.2, -0.75)); + // Set bar type, smooth cones + m_chart->setBarType(QAbstract3DGraph::MeshCones, true); + // Adjust zoom manually; automatic zoom level calculation does not work well with negative + // spacings (in setBarSpacing) + m_chart->setCameraPosition(10.0f, 5.0f, 70.0f); +#else + // Set bar specifications; make them twice as wide as they're deep + m_chart->setBarThickness(2.0f); + m_chart->setBarSpacing(QSizeF(0.0, 0.0)); + // Set bar type, flat bars + // Adjust camera position + m_chart->scene()->activeCamera()->setCameraPosition(10.0f, 7.5f, 75.0f); +#endif + // Disable selection + m_chart->setSelectionMode(QAbstract3DGraph::SelectionNone); + QObject::connect(m_engine, &Engine::changedSpectrum, this, &MainApp::spectrumChanged); + QObject::connect(m_engine, &Engine::stateChanged, this, &MainApp::stateChanged); + m_restartTimer->setSingleShot(true); + QObject::connect(m_restartTimer, &QTimer::timeout, this, &MainApp::restart); + + QBar3DSeries *series = new QBar3DSeries(); + series->setBaseColor(QColor(Qt::red)); + series->setMesh(QAbstract3DSeries::MeshBar); + m_chart->addSeries(series); +} + +MainApp::~MainApp() +{ + delete m_engine; + delete m_restartTimer; +} + +void MainApp::start(QString fileName) +{ + m_engine->loadFile(fileName); + m_engine->startPlayback(); +} + +//----------------------------------------------------------------------------- +// Public slots +//----------------------------------------------------------------------------- + +void MainApp::spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum) +{ + Q_UNUSED(position); + Q_UNUSED(length); + //qDebug() << "updating bar values" << position << length; + QBarDataRow *data = new QBarDataRow(SpectrumNumBands); + for (int bar = 0; bar < SpectrumNumBands; bar++) { + // init data set + (*data)[bar].setValue(qreal(0.0)); + } + FrequencySpectrum::const_iterator i = spectrum.begin(); + const FrequencySpectrum::const_iterator end = spectrum.end(); + for ( ; i != end; ++i) { + const FrequencySpectrum::Element e = *i; + if (e.frequency >= m_lowFreq && e.frequency < m_highFreq) { + (*data)[barIndex(e.frequency)].setValue(qMax(data->at(barIndex(e.frequency)).value(), float(e.amplitude))); + } + } + m_chart->seriesList().at(0)->dataProxy()->insertRow(0, data); +} + +void MainApp::stateChanged(QAudio::Mode mode, QAudio::State state) +{ + //qDebug() << "mode:" << mode << " state: " << state; + // Restart once playback is finished + if (QAudio::AudioOutput == mode && QAudio::StoppedState == state) + m_restartTimer->start(500); +} + +//----------------------------------------------------------------------------- +// Private slots +//----------------------------------------------------------------------------- + +void MainApp::restart() +{ + // Change file each time + QString fileToLoad = QStringLiteral(":/file"); + static int fileNo = 3; + QString nrStr; + nrStr.setNum(fileNo); + fileToLoad.append(nrStr); + //qDebug() << fileToLoad; + start(fileToLoad); + fileNo++; + if (fileNo > 3) + fileNo = 1; +} + +//----------------------------------------------------------------------------- +// Private functions +//----------------------------------------------------------------------------- + +int MainApp::barIndex(qreal frequency) const +{ + Q_ASSERT(frequency >= m_lowFreq && frequency < m_highFreq); + const qreal bandWidth = (m_highFreq - m_lowFreq) / SpectrumNumBands; + const int index = (frequency - m_lowFreq) / bandWidth; + if (index < 0 || index >= SpectrumNumBands) + Q_ASSERT(false); + //qDebug() << "insert to" << index; + return index; +} + +//----------------------------------------------------------------------------- +// main +//----------------------------------------------------------------------------- +int main(int argc, char *argv[]) +{ + QGuiApplication app(argc, argv); + app.setApplicationName("QtDataVisualization spectrum analyzer"); + + Q3DBars window; + window.setFlags(window.flags() ^ Qt::FramelessWindowHint); + window.resize(1024, 768); + window.show(); + + MainApp *mainApp = new MainApp(&window); + mainApp->start(QStringLiteral(":/file2")); + + return app.exec(); +} |