QIfMediaDeviceDiscoveryModel Class

Provides a model for discovering media devices. More...

Header: #include <QIfMediaDeviceDiscoveryModel>
qmake: QT += ifmedia
Instantiated By: MediaDeviceDiscoveryModel
Inherits: QIfAbstractFeatureListModel

Public Types

enum Roles { NameRole, TypeRole, ServiceObjectRole }

Properties

Public Functions

QIfMediaDeviceDiscoveryModel(QObject *parent = nullptr)
QIfMediaDevice *at(int i) const
QIfMediaDevice *get(int i) const

Reimplemented Public Functions

virtual QVariant data(const QModelIndex &index, int role) const override
virtual QHash<int, QByteArray> roleNames() const override
virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override

Signals

void countChanged()
void deviceAdded(QIfMediaDevice *device)
void deviceRemoved(QIfMediaDevice *device)

Reimplemented Protected Functions

virtual void clearServiceObject() override
virtual void connectToServiceObject(QIfServiceObject *serviceObject) override

Detailed Description

The QIfMediaDeviceDiscoveryModel provides a way to query for available media devices and to get notified when new media devices get added or are removed.

All devices listed here need to be a subclass of QIfMediaDevice.

The QIfMediaDeviceDiscoveryModel expects a single backend to be available. It is recommended to use it with discoveryMode set to QIfAbstractFeature::AutoDiscovery.

Member Type Documentation

enum QIfMediaDeviceDiscoveryModel::Roles

ConstantValueDescription
QIfMediaDeviceDiscoveryModel::NameRoleQt::DisplayRoleThe name of the media device. E.g. The name of the connected USB-Thumbdrive/SDCard or a connected Ipod.
QIfMediaDeviceDiscoveryModel::TypeRoleQt::UserRoleThe type of the media device. See SupportedMediaDevices for a detailed listing.
QIfMediaDeviceDiscoveryModel::ServiceObjectRoleQt::UserRole + 1A pointer to the media device itself. This pointer can be used as the ServiceObject for other Features. E.g. The QIfFilterAndBrowseModel.

Property Documentation

[read-only] count : const int

Holds the current number of rows in this model.

Access functions:

virtual int rowCount(const QModelIndex &parent = QModelIndex()) const override

Notifier signal:

void countChanged()

Member Function Documentation

QIfMediaDeviceDiscoveryModel::QIfMediaDeviceDiscoveryModel(QObject *parent = nullptr)

Constructs a QIfMediaDeviceDiscoveryModel.

The parent argument is passed on to the QIfAbstractFeatureListModel base class.

[signal] void QIfMediaDeviceDiscoveryModel::deviceAdded(QIfMediaDevice *device)

This signal is emitted whenever a new media device got added. The new media device is passed as device.

[signal] void QIfMediaDeviceDiscoveryModel::deviceRemoved(QIfMediaDevice *device)

This signal is emitted whenever a media device got removed. The device which got removed is passed as device. Afterwards the device will be deleted.

QIfMediaDevice *QIfMediaDeviceDiscoveryModel::at(int i) const

Returns the media device at index i.

Note: The returned device is owned by the model and can be deleted at any time.

[override virtual protected] void QIfMediaDeviceDiscoveryModel::clearServiceObject()

Reimplements: QIfAbstractFeatureListModel::clearServiceObject().

[override virtual protected] void QIfMediaDeviceDiscoveryModel::connectToServiceObject(QIfServiceObject *serviceObject)

Reimplements: QIfAbstractFeatureListModel::connectToServiceObject(QIfServiceObject *serviceObject).

[override virtual] QVariant QIfMediaDeviceDiscoveryModel::data(const QModelIndex &index, int role) const

Reimplements: QAbstractItemModel::data(const QModelIndex &index, int role) const.

[invokable] QIfMediaDevice *QIfMediaDeviceDiscoveryModel::get(int i) const

Returns the media device at index i.

Note: The returned device is owned by the model and can be deleted at any time.

Note: This function can be invoked via the meta-object system and from QML. See Q_INVOKABLE.

[override virtual] QHash<int, QByteArray> QIfMediaDeviceDiscoveryModel::roleNames() const

Reimplements: QAbstractItemModel::roleNames() const.

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