#include "qtaudio.h"
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#include <QApplication>
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#include <QAudioDeviceInfo>
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#include <QAudioOutput>
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#include <QDebug>
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#include <QDesktopWidget>
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qtAudio::qtAudio(QWidget *parent)
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{
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const QRect availableGeometry = QApplication::desktop()->availableGeometry(parent);
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resize(availableGeometry.width(), availableGeometry.height());
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QFont f;
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f.setPixelSize(availableGeometry.height()/20);
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listWidget = new QListWidget();
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QList<QAudioDeviceInfo> alist = QAudioDeviceInfo::availableDevices(QAudio::AudioOutput);
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QAudioDeviceInfo defaultinfo(QAudioDeviceInfo::defaultOutputDevice());
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qDebug() << "default device name: " << defaultinfo.deviceName();
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for(auto info : alist){
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QListWidgetItem *audioItem = new QListWidgetItem();
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audioItem->setText(info.deviceName());
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audioItem->setFont(f);
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audioItem->setFlags(audioItem->flags() | Qt::ItemIsUserCheckable);
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if(defaultinfo == info){
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audioItem->setCheckState(Qt::Checked);
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} else {
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audioItem->setCheckState(Qt::Unchecked);
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}
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qDebug() << info.deviceName();
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listWidget->addItem(audioItem);
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}
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listWidget->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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listWidget->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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listWidget->setMinimumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
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listWidget->setMaximumHeight(listWidget->sizeHintForRow(0) * listWidget->count());
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slider = new QSlider(Qt::Horizontal);
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slider->setMinimum(0);
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slider->setMaximum(10);
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QAudioOutput out(defaultinfo);
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qreal v = out.volume();
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slider->setValue(qRound(v*10));
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connect(slider, SIGNAL(valueChanged(int)), this, SLOT(changeVolume(int)));
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vLayout = new QVBoxLayout();
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vLayout->addWidget(listWidget);
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vLayout->addWidget(slider);
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vLayout->setAlignment(Qt::AlignTop);
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setLayout(vLayout);
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setStyleSheet("background-color:rgb(204,228,247)");
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setObjectName("Audio");
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connect(listWidget, SIGNAL(itemClicked(QListWidgetItem *)), this, SLOT(on_itemClicked(QListWidgetItem *)));
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}
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qtAudio::~qtAudio()
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{
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listWidget->clear();
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delete listWidget;
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delete slider;
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delete vLayout;
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}
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void qtAudio::on_itemClicked(QListWidgetItem *item)
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{
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qDebug() << item->text();
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}
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void qtAudio::changeVolume(int value)
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{
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QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
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QAudioOutput out(info);
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qreal linearVolume = QAudio::convertVolume(value / qreal(100.0),
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QAudio::LinearVolumeScale,
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QAudio::LogarithmicVolumeScale);
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qDebug() << value;
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qreal v = qreal(value) / qreal(10.0);
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qDebug() << v;
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out.setVolume(v);
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QApplication::beep();
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}
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