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Diffstat (limited to 'examples/multimedia/radio/radio.cpp')
-rw-r--r-- | examples/multimedia/radio/radio.cpp | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/examples/multimedia/radio/radio.cpp b/examples/multimedia/radio/radio.cpp new file mode 100644 index 000000000..24edccf08 --- /dev/null +++ b/examples/multimedia/radio/radio.cpp @@ -0,0 +1,158 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 Digia Plc and its Subsidiary(-ies) 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "radio.h" + +Radio::Radio() +{ + radio = new QRadioTuner; + connect(radio, SIGNAL(error(QRadioTuner::Error)), this, SLOT(error(QRadioTuner::Error))); + + if (radio->isBandSupported(QRadioTuner::FM)) + radio->setBand(QRadioTuner::FM); + + QWidget *window = new QWidget; + QVBoxLayout *layout = new QVBoxLayout; + QHBoxLayout *buttonBar = new QHBoxLayout; + QHBoxLayout *topBar = new QHBoxLayout; + + layout->addLayout(topBar); + + freq = new QLabel; + freq->setText(QString("%1 kHz").arg(radio->frequency()/1000)); + topBar->addWidget(freq); + connect(radio, SIGNAL(frequencyChanged(int)), SLOT(freqChanged(int))); + + signal = new QLabel; + if (radio->isAvailable()) + signal->setText(tr("No Signal")); + else + signal->setText(tr("No radio found")); + topBar->addWidget(signal); + connect(radio, SIGNAL(signalStrengthChanged(int)), SLOT(signalChanged(int))); + + volumeSlider = new QSlider(Qt::Vertical,this); + volumeSlider->setRange(0, 100); + volumeSlider->setValue(50); + connect(volumeSlider, SIGNAL(valueChanged(int)), SLOT(updateVolume(int))); + topBar->addWidget(volumeSlider); + + layout->addLayout(buttonBar); + + searchLeft = new QPushButton; + searchLeft->setText(tr("scan Down")); + connect(searchLeft, SIGNAL(clicked()), SLOT(searchDown())); + buttonBar->addWidget(searchLeft); + + left = new QPushButton; + left->setText(tr("Freq Down")); + connect(left, SIGNAL(clicked()), SLOT(freqDown())); + buttonBar->addWidget(left); + + right = new QPushButton; + connect(right, SIGNAL(clicked()), SLOT(freqUp())); + right->setText(tr("Freq Up")); + buttonBar->addWidget(right); + + searchRight = new QPushButton; + searchRight->setText(tr("scan Up")); + connect(searchRight, SIGNAL(clicked()), SLOT(searchUp())); + buttonBar->addWidget(searchRight); + + window->setLayout(layout); + setCentralWidget(window); + window->show(); + + radio->start(); +} + +Radio::~Radio() +{ +} + +void Radio::freqUp() +{ + int f = radio->frequency(); + f += radio->frequencyStep(QRadioTuner::FM); + radio->setFrequency(f); +} + +void Radio::freqDown() +{ + int f = radio->frequency(); + f -= radio->frequencyStep(QRadioTuner::FM); + radio->setFrequency(f); +} + +void Radio::searchUp() +{ + radio->searchForward(); +} + +void Radio::searchDown() +{ + radio->searchBackward(); +} + +void Radio::freqChanged(int) +{ + freq->setText(QString("%1 kHz").arg(radio->frequency()/1000)); +} + +void Radio::signalChanged(int) +{ + if(radio->signalStrength() > 25) + signal->setText(tr("Got Signal")); + else + signal->setText(tr("No Signal")); +} + +void Radio::updateVolume(int v) +{ + radio->setVolume(v); +} + +void Radio::error(QRadioTuner::Error error) +{ + const QMetaObject *metaObj = radio->metaObject(); + QMetaEnum errorEnum = metaObj->enumerator(metaObj->indexOfEnumerator("Error")); + qWarning().nospace() << "Warning: Example application received error QRadioTuner::" << errorEnum.valueToKey(error); +} + |