From ee0ea8c4424dc89e3bb44895a5510729f15eb0c3 Mon Sep 17 00:00:00 2001
From: hawcroft <derick.hawcroft@nokia.com>
Date: Wed, 28 Sep 2011 13:04:18 +1000
Subject: Update audiooutput example with volume slider

Update example for new volume API

Change-Id: I1b9ccbccc62930549e667f0063b3d76feb23a2ea
Reviewed-on: http://codereview.qt-project.org/5662
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: derick hawcroft <derick.hawcroft@nokia.com>
---
 examples/audiooutput/audiooutput.cpp | 20 ++++++++++++++++++++
 examples/audiooutput/audiooutput.h   |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/examples/audiooutput/audiooutput.cpp b/examples/audiooutput/audiooutput.cpp
index 68fbbcc..b8193fb 100644
--- a/examples/audiooutput/audiooutput.cpp
+++ b/examples/audiooutput/audiooutput.cpp
@@ -51,6 +51,7 @@ const QString AudioTest::PushModeLabel(tr("Enable push mode"));
 const QString AudioTest::PullModeLabel(tr("Enable pull mode"));
 const QString AudioTest::SuspendLabel(tr("Suspend playback"));
 const QString AudioTest::ResumeLabel(tr("Resume playback"));
+const QString AudioTest::VolumeLabel(tr("Volume:"));
 
 const int DurationSeconds = 1;
 const int ToneFrequencyHz = 600;
@@ -190,6 +191,18 @@ void AudioTest::initializeWindow()
     connect(m_suspendResumeButton, SIGNAL(clicked()), SLOT(toggleSuspendResume()));
     layout->addWidget(m_suspendResumeButton);
 
+    QHBoxLayout *volumeBox = new QHBoxLayout;
+    m_volumeLabel = new QLabel;
+    m_volumeLabel->setText(VolumeLabel);
+    m_volumeSlider = new QSlider(Qt::Horizontal);
+    m_volumeSlider->setMinimum(0);
+    m_volumeSlider->setMaximum(100);
+    m_volumeSlider->setSingleStep(10);
+    connect(m_volumeSlider, SIGNAL(valueChanged(int)), this, SLOT(volumeChanged(int)));
+    volumeBox->addWidget(m_volumeLabel);
+    volumeBox->addWidget(m_volumeSlider);
+    layout->addLayout(volumeBox);
+
     window->setLayout(layout.data());
     layout.take(); // ownership transferred
 
@@ -231,6 +244,7 @@ void AudioTest::createAudioOutput()
     connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(stateChanged(QAudio::State)));
     m_generator->start();
     m_audioOutput->start(m_generator);
+    m_volumeSlider->setValue(int(m_audioOutput->volume()*100.0f));
 }
 
 AudioTest::~AudioTest()
@@ -248,6 +262,12 @@ void AudioTest::deviceChanged(int index)
     createAudioOutput();
 }
 
+void AudioTest::volumeChanged(int value)
+{
+    if (m_audioOutput)
+        m_audioOutput->setVolume(qreal(value/100.0f));
+}
+
 void AudioTest::notified()
 {
     qWarning() << "bytesFree = " << m_audioOutput->bytesFree()
diff --git a/examples/audiooutput/audiooutput.h b/examples/audiooutput/audiooutput.h
index 519fa0c..3a07039 100644
--- a/examples/audiooutput/audiooutput.h
+++ b/examples/audiooutput/audiooutput.h
@@ -45,6 +45,8 @@
 
 #include <QObject>
 #include <QMainWindow>
+#include <QLabel>
+#include <QSlider>
 #include <QIODevice>
 #include <QTimer>
 #include <QPushButton>
@@ -94,6 +96,8 @@ private:
     QPushButton*     m_modeButton;
     QPushButton*     m_suspendResumeButton;
     QComboBox*       m_deviceBox;
+    QLabel*          m_volumeLabel;
+    QSlider*         m_volumeSlider;
 
     QAudioDeviceInfo m_device;
     Generator*       m_generator;
@@ -108,6 +112,7 @@ private:
     static const QString PullModeLabel;
     static const QString SuspendLabel;
     static const QString ResumeLabel;
+    static const QString VolumeLabel;
 
 private slots:
     void notified();
@@ -116,6 +121,7 @@ private slots:
     void toggleSuspendResume();
     void stateChanged(QAudio::State state);
     void deviceChanged(int index);
+    void volumeChanged(int);
 };
 
 #endif
-- 
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