940ef93c30
Change-Id: I1dcd7bf7427f25bb9e19cbe3c7e17808b0fc9708 Reviewed-by: Michael Goddard <michael.goddard@nokia.com> Reviewed-by: Peter Yard <peter.yard@nokia.com>
547 lines
16 KiB
C++
547 lines
16 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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**
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** This file is part of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdeclarativeradio_p.h"
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#include "qdeclarativeradiodata_p.h"
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QT_BEGIN_NAMESPACE
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/*!
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\qmlclass Radio QDeclarativeRadio
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\inqmlmodule QtMultimedia 5
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\brief Access radio functionality from a QML application.
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\ingroup multimedia_qml
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\ingroup multimedia_radio_qml
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\inherits Item
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Radio is part of the \b{QtMultimedia 5.0} module.
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\qml
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import QtQuick 2.0
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import QtMultimedia 5.0
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Rectangle {
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width: 320
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height: 480
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Radio {
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id: radio
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band: Radio.FM
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}
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MouseArea {
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x: 0; y: 0
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height: parent.height
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width: parent.width / 2
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onClicked: radio.scanDown()
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}
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MouseArea {
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x: parent.width / 2; y: 0
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height: parent.height
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width: parent.width / 2
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onClicked: radio.scanUp()
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}
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}
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\endqml
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You can use \c Radio to tune the radio and get information about the signal.
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You can also use the Radio to get information about tuning, for instance the
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frequency steps supported for tuning.
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The corresponding \l RadioData gives RDS information about the
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current radio station. The best way to access the RadioData for
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the current Radio is to use the \c radioData property.
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\sa {Radio Overview}
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*/
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QDeclarativeRadio::QDeclarativeRadio(QObject *parent) :
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QObject(parent)
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{
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m_radioTuner = new QRadioTuner(this);
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m_radioData = new QDeclarativeRadioData(m_radioTuner, this);
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connect(m_radioTuner, SIGNAL(stateChanged(QRadioTuner::State)), this, SLOT(_q_stateChanged(QRadioTuner::State)));
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connect(m_radioTuner, SIGNAL(bandChanged(QRadioTuner::Band)), this, SLOT(_q_bandChanged(QRadioTuner::Band)));
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connect(m_radioTuner, SIGNAL(frequencyChanged(int)), this, SIGNAL(frequencyChanged(int)));
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connect(m_radioTuner, SIGNAL(stereoStatusChanged(bool)), this, SIGNAL(stereoStatusChanged(bool)));
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connect(m_radioTuner, SIGNAL(searchingChanged(bool)), this, SIGNAL(searchingChanged(bool)));
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connect(m_radioTuner, SIGNAL(signalStrengthChanged(int)), this, SIGNAL(signalStrengthChanged(int)));
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connect(m_radioTuner, SIGNAL(volumeChanged(int)), this, SIGNAL(volumeChanged(int)));
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connect(m_radioTuner, SIGNAL(mutedChanged(bool)), this, SIGNAL(mutedChanged(bool)));
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connect(m_radioTuner, SIGNAL(stationFound(int, QString)), this, SIGNAL(stationFound(int, QString)));
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connect(m_radioTuner, SIGNAL(antennaConnectedChanged(bool)), this, SIGNAL(antennaConnectedChanged(bool)));
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// Note we map availabilityError->availability
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connect(m_radioTuner, SIGNAL(availabilityErrorChanged(QtMultimedia::AvailabilityError)), this, SLOT(_q_availabilityChanged(QtMultimedia::AvailabilityError)));
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connect(m_radioTuner, SIGNAL(error(QRadioTuner::Error)), this, SLOT(_q_error(QRadioTuner::Error)));
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}
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QDeclarativeRadio::~QDeclarativeRadio()
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{
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}
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/*!
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\qmlproperty enumeration QtMultimedia5::Radio::state
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This property holds the current state of the Radio.
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\table
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\header \li Value \li Description
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\row \li ActiveState
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\li The radio is started and active
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\row \li StoppedState
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\li The radio is stopped
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\endtable
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\sa start, stop
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*/
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QDeclarativeRadio::State QDeclarativeRadio::state() const
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{
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return static_cast<QDeclarativeRadio::State>(m_radioTuner->state());
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}
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/*!
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\qmlproperty enumeration QtMultimedia5::Radio::band
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This property holds the frequency band used for the radio, which can be specified as
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any one of the values in the table below.
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\table
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\header \li Value \li Description
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\row \li AM
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\li 520 to 1610 kHz, 9 or 10kHz channel spacing, extended 1610 to 1710 kHz
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\row \li FM
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\li 87.5 to 108.0 MHz, except Japan 76-90 MHz
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\row \li SW
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\li 1.711 to 30.0 MHz, divided into 15 bands. 5kHz channel spacing
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\row \li LW
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\li 148.5 to 283.5 kHz, 9kHz channel spacing (Europe, Africa, Asia)
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\row \li FM2
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\li range not defined, used when area supports more than one FM range
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\endtable
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*/
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QDeclarativeRadio::Band QDeclarativeRadio::band() const
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{
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return static_cast<QDeclarativeRadio::Band>(m_radioTuner->band());
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::frequency
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Sets the frequency in Hertz that the radio is tuned to. The frequency must be within the frequency
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range for the current band, otherwise it will be changed to be within the frequency range.
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\sa maximumFrequency, minimumFrequency
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*/
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int QDeclarativeRadio::frequency() const
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{
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return m_radioTuner->frequency();
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}
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/*!
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\qmlproperty enumeration QtMultimedia5::Radio::stereoMode
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This property holds the stereo mode of the radio, which can be set to any one of the
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values in the table below.
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\table
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\header \li Value \li Description
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\row \li Auto
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\li Uses stereo mode matching the station
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\row \li ForceStereo
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\li Forces the radio to play the station in stereo, converting the sound signal if necessary
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\row \li ForceMono
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\li Forces the radio to play the station in mono, converting the sound signal if necessary
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\endtable
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*/
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QDeclarativeRadio::StereoMode QDeclarativeRadio::stereoMode() const
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{
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return static_cast<QDeclarativeRadio::StereoMode>(m_radioTuner->stereoMode());
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::volume
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Set this property to control the volume of the radio. The valid range of the volume is from 0 to 100.
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*/
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int QDeclarativeRadio::volume() const
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{
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return m_radioTuner->volume();
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}
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/*!
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\qmlproperty bool QtMultimedia5::Radio::muted
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This property reflects whether the radio is muted or not.
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*/
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bool QDeclarativeRadio::muted() const
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{
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return m_radioTuner->isMuted();
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}
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/*!
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\qmlproperty bool QtMultimedia5::Radio::stereo
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This property holds whether the radio is receiving a stereo signal or not. If \l stereoMode is
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set to ForceMono the value will always be false. Likewise, it will always be true if stereoMode
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is set to ForceStereo.
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\sa stereoMode
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*/
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bool QDeclarativeRadio::stereo() const
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{
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return m_radioTuner->isStereo();
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::signalStrength
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The strength of the current radio signal as a percentage where 0% equals no signal, and 100% is a
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very good signal.
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*/
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int QDeclarativeRadio::signalStrength() const
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{
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return m_radioTuner->signalStrength();
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}
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/*!
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\qmlproperty bool QtMultimedia5::Radio::searching
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This property is true if the radio is currently searching for radio stations, for instance using the \l scanUp,
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\l scanDown, and \l searchAllStations methods. Once the search completes, or if it is cancelled using
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\l cancelScan, this property will be false.
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*/
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bool QDeclarativeRadio::searching() const
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{
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return m_radioTuner->isSearching();
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::frequencyStep
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The number of Hertz for each step when tuning the radio manually. The value is for the current \l band.
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*/
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int QDeclarativeRadio::frequencyStep() const
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{
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return m_radioTuner->frequencyStep(m_radioTuner->band());
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::minimumFrequency
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The minimum frequency for the current \l band.
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*/
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int QDeclarativeRadio::minimumFrequency() const
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{
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return m_radioTuner->frequencyRange(m_radioTuner->band()).first;
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::maximumFrequency
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The maximum frequency for the current \l band.
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*/
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int QDeclarativeRadio::maximumFrequency() const
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{
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return m_radioTuner->frequencyRange(m_radioTuner->band()).second;
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}
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/*!
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\qmlproperty int QtMultimedia5::Radio::antennaConnected
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This property is true if there is an antenna connected. Otherwise it will be false.
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*/
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bool QDeclarativeRadio::isAntennaConnected() const
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{
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return m_radioTuner->isAntennaConnected();
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}
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/*!
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\qmlproperty enumeration QtMultimedia5::Radio::availability
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Returns the availability state of the radio.
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This is one of:
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\table
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\header \li Value \li Description
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\row \li Available
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\li The radio is available to use
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\row \li Busy
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\li The radio is usually available to use, but is currently busy.
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This can happen when some other process needs to use the audio
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hardware.
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\row \li Unavailable
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\li The radio is not available to use (there may be no radio
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hardware)
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\row \li ResourceMissing
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\li There is one or more resources missing, so the radio cannot
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be used. It may be possible to try again at a later time. This
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can occur if there is no antenna connected - see the \l antennaConnected
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property as well.
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\endtable
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*/
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QDeclarativeRadio::Availability QDeclarativeRadio::availability() const
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{
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return Availability(m_radioTuner->availabilityError());
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}
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void QDeclarativeRadio::setBand(QDeclarativeRadio::Band band)
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{
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m_radioTuner->setBand(static_cast<QRadioTuner::Band>(band));
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}
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void QDeclarativeRadio::setFrequency(int frequency)
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{
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m_radioTuner->setFrequency(frequency);
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}
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void QDeclarativeRadio::setStereoMode(QDeclarativeRadio::StereoMode stereoMode)
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{
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m_radioTuner->setStereoMode(static_cast<QRadioTuner::StereoMode>(stereoMode));
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}
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void QDeclarativeRadio::setVolume(int volume)
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{
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m_radioTuner->setVolume(volume);
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}
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void QDeclarativeRadio::setMuted(bool muted)
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{
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m_radioTuner->setMuted(muted);
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::cancelScan()
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Cancel the current scan. Will also cancel a search started with \l searchAllStations.
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*/
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void QDeclarativeRadio::cancelScan()
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{
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m_radioTuner->cancelSearch();
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::scanDown()
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Searches backward in the frequency range for the current band.
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*/
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void QDeclarativeRadio::scanDown()
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{
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m_radioTuner->searchBackward();
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::scanUp()
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Searches forward in the frequency range for the current band.
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*/
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void QDeclarativeRadio::scanUp()
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{
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m_radioTuner->searchForward();
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::searchAllStations(enumeration searchMode)
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Start searching the complete frequency range for the current band, and save all the
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radio stations found. The search mode can be either of the values described in the
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table below.
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\table
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\header \li Value \li Description
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\row \li SearchFast
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\li Stores each radio station for later retrival and tuning
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\row \li SearchGetStationId
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\li Does the same as SearchFast, but also emits the station Id with the \l stationFound signal.
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\endtable
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The snippet below uses \c searchAllStations with \c SearchGetStationId to receive all the radio
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stations in the current band, and store them in a ListView. The station Id is shown to the user
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and if the user presses a station, the radio is tuned to this station.
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\qml
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Item {
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width: 640
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height: 360
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Radio {
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id: radio
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onStationFound: radioStations.append({"frequency": frequency, "stationId": stationId})
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}
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ListModel {
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id: radioStations
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}
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ListView {
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model: radioStations
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delegate: Rectangle {
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MouseArea {
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anchors.fill: parent
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onClicked: radio.frequency = frequency
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}
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Text {
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anchors.fill: parent
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text: stationId
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}
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}
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}
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Rectangle {
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MouseArea {
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anchors.fill: parent
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onClicked: radio.searchAllStations(Radio.SearchGetStationId)
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}
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}
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}
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\endqml
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*/
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void QDeclarativeRadio::searchAllStations(QDeclarativeRadio::SearchMode searchMode)
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{
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m_radioTuner->searchAllStations(static_cast<QRadioTuner::SearchMode>(searchMode));
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::tuneDown()
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Decrements the frequency by the frequency step for the current band. If the frequency is already set
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to the minimum frequency, calling this function has no effect.
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\sa band, frequencyStep, minimumFrequency
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*/
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void QDeclarativeRadio::tuneDown()
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{
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int f = frequency();
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f = f - frequencyStep();
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setFrequency(f);
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::tuneUp()
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Increments the frequency by the frequency step for the current band. If the frequency is already set
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to the maximum frequency, calling this function has no effect.
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\sa band, frequencyStep, maximumFrequency
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*/
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void QDeclarativeRadio::tuneUp()
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{
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int f = frequency();
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f = f + frequencyStep();
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setFrequency(f);
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::start()
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Starts the radio. If the radio is available, as determined by the \l availability property,
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this will result in the \l state becoming \c ActiveState.
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*/
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void QDeclarativeRadio::start()
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{
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m_radioTuner->start();
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}
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/*!
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\qmlmethod QtMultimedia5::Radio::stop()
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Stops the radio. After calling this method the \l state will be \c StoppedState.
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*/
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void QDeclarativeRadio::stop()
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{
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m_radioTuner->stop();
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}
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void QDeclarativeRadio::_q_stateChanged(QRadioTuner::State state)
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{
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emit stateChanged(static_cast<QDeclarativeRadio::State>(state));
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}
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void QDeclarativeRadio::_q_bandChanged(QRadioTuner::Band band)
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{
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emit bandChanged(static_cast<QDeclarativeRadio::Band>(band));
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}
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void QDeclarativeRadio::_q_error(QRadioTuner::Error errorCode)
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{
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emit error(static_cast<QDeclarativeRadio::Error>(errorCode));
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emit errorChanged();
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}
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void QDeclarativeRadio::_q_availabilityChanged(QtMultimedia::AvailabilityError error)
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{
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emit availabilityChanged(Availability(error));
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}
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/*!
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\qmlsignal QtMultimedia5::Radio::stationFound(int frequency, string stationId)
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This signal is emitted when a new radio station is found. This signal is only emitted
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if \l searchAllStations is called with \c SearchGetStationId.
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The \a frequency is returned in Hertz, and the \a stationId corresponds to the station Id
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in the \l RadioData for this radio station.
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*/
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QT_END_NAMESPACE
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