ObjectDescriptionModel< type > Class Template Reference


Detailed Description

template<ObjectDescriptionType type>
class Phonon::ObjectDescriptionModel< type >

The ObjectDescriptionModel class provides a model from a list of ObjectDescription objects.

ObjectDescriptionModel is a readonly model that supplies a list using ObjectDescription::name() for the text and ObjectDescription::description() for the tooltip. If set the properties "icon" and "available" are used to set the decoration and disable the item (disabled only visually, you can still select and drag it).

It also provides the methods moveUp() and moveDown() to order the list. Additionally drag and drop is possible so that QAbstractItemView::InternalMove can be used. The resulting order of the ObjectDescription::index() values can then be retrieved using tupleIndexOrder().

An example use case would be to give the user a QComboBox to select the output device:

 QComboBox *cb = new QComboBox(parentWidget);
 ObjectDescriptionModel *model = new ObjectDescriptionModel(cb);
 model->setModelData(BackendCapabilities::availableAudioOutputDevices());
 cb->setModel(model);
 cb->setCurrentIndex(0); // select first entry

And to retrieve the selected AudioOutputDevice:

 int cbIndex = cb->currentIndex();
 AudioOutputDevice selectedDevice = model->modelData(cbIndex);
Author:
Matthias Kretz <kretz@kde.org>

Definition at line 193 of file objectdescriptionmodel.h.

#include <Phonon/ObjectDescriptionModel>

Inheritance diagram for ObjectDescriptionModel< type >:
Inheritance graph
[legend]

List of all members.

Public Member Functions

PHONON_TEMPLATE_CLASS_MEMBER_EXPORT
const QMetaObject
metaObject () const
PHONON_TEMPLATE_CLASS_MEMBER_EXPORT
void * 
qt_metacast (const char *_clname)
int  rowCount (const QModelIndex &parent=QModelIndex()) const
  Returns the number of rows in the model.
QVariant  data (const QModelIndex &index, int role=Qt::DisplayRole) const
  Returns data from the item with the given index for the specified role.
Qt::ItemFlags  flags (const QModelIndex &index) const
  Reimplemented to show unavailable devices as disabled (but still selectable).
QList< int >  tupleIndexOrder () const
  Returns a list of indexes in the same order as they are in the model.
int  tupleIndexAtPositionIndex (int positionIndex) const
  Returns the ObjectDescription::index for the tuple at the given position positionIndex.
QMimeData mimeData (const QModelIndexList &indexes) const
  Returns the MIME data that dropMimeData() can use to create new items.
void  moveUp (const QModelIndex &index)
  Moves the item at the given index up.
void  moveDown (const QModelIndex &index)
  Moves the item at the given index down.
  ObjectDescriptionModel (QObject *parent=0)
  Constructs a ObjectDescription model with the given parent.
  ObjectDescriptionModel (const QList< ObjectDescription< type > > &data, QObject *parent=0)
  Constructs a ObjectDescription model with the given parent and the given data.
void  setModelData (const QList< ObjectDescription< type > > &data)
  Sets the model data using the list provided by data.
QList< ObjectDescription< type > >  modelData () const
  Returns the model data.
ObjectDescription< type >  modelData (const QModelIndex &index) const
  Returns one ObjectDescription of the model data for the given index.
Qt::DropActions  supportedDropActions () const
  This model supports drag and drop to copy or move items.
bool  dropMimeData (const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent)
  Accept drops from other models of the same ObjectDescriptionType.
bool  removeRows (int row, int count, const QModelIndex &parent=QModelIndex())
  Removes count rows starting with the given row.
QStringList  mimeTypes () const
  Returns a list of supported drag and drop MIME types.

Static Public Attributes

static Q_OBJECT_CHECK
PHONON_TEMPLATE_CLASS_MEMBER_EXPORT
const QMetaObject 
staticMetaObject

Protected Attributes

ObjectDescriptionModelData *const  d

Constructor & Destructor Documentation

ObjectDescriptionModel ( QObject parent = 0 ) [inline, explicit]

Constructs a ObjectDescription model with the given parent.

Definition at line 286 of file objectdescriptionmodel.h.

: QAbstractListModel(parent), d(new ObjectDescriptionModelData(this)) {} //krazy:exclude=inline
ObjectDescriptionModel ( const QList< ObjectDescription< type > > &  data,
QObject parent = 0 
) [inline, explicit]

Constructs a ObjectDescription model with the given parent and the given data.

Definition at line 292 of file objectdescriptionmodel.h.

                : QAbstractListModel(parent), d(new ObjectDescriptionModelData(this)) { setModelData(data); }

Member Function Documentation

PHONON_TEMPLATE_CLASS_MEMBER_EXPORT const QMetaObject* metaObject ( ) const
PHONON_TEMPLATE_CLASS_MEMBER_EXPORT void* qt_metacast ( const char *  _clname )
int rowCount ( const QModelIndex parent = QModelIndex() ) const [inline, virtual]

Returns the number of rows in the model.

This value corresponds to the size of the list passed through setModelData.

Parameters:
parent The optional parent argument is used in most models to specify the parent of the rows to be counted. Because this is a list if a valid parent is specified the result will always be 0.

Reimplemented from QAbstractItemModel.

See also:
QAbstractItemModel::rowCount

Implements QAbstractItemModel.

Definition at line 218 of file objectdescriptionmodel.h.

{ return d->rowCount(parent); } //krazy:exclude=inline
QVariant data ( const QModelIndex index,
int  role = Qt::DisplayRole 
) const [inline, virtual]

Returns data from the item with the given index for the specified role.

If the view requests an invalid index, an invalid variant is returned.

Reimplemented from QAbstractItemModel.

See also:
QAbstractItemModel::data
Qt::ItemDataRole

Implements QAbstractItemModel.

Definition at line 231 of file objectdescriptionmodel.h.

{ return d->data(index, role); } //krazy:exclude=inline
Qt::ItemFlags flags ( const QModelIndex index ) const [inline, virtual]

Reimplemented to show unavailable devices as disabled (but still selectable).

Reimplemented from QAbstractItemModel.

Definition at line 237 of file objectdescriptionmodel.h.

{ return d->flags(index); } //krazy:exclude=inline
QList<int> tupleIndexOrder ( ) const [inline]

Returns a list of indexes in the same order as they are in the model.

The indexes come from the ObjectDescription::index method.

This is useful to let the user define a list of preference.

Definition at line 246 of file objectdescriptionmodel.h.

{ return d->tupleIndexOrder(); } //krazy:exclude=inline
int tupleIndexAtPositionIndex ( int  positionIndex ) const [inline]

Returns the ObjectDescription::index for the tuple at the given position positionIndex.

For example a QComboBox will give you the currentIndex as the position in the list. But to select the according AudioOutputDevice using AudioOutputDevice::fromIndex you can use this method.

Parameters:
positionIndex The position in the list.

Definition at line 258 of file objectdescriptionmodel.h.

{ return d->tupleIndexAtPositionIndex(positionIndex); } //krazy:exclude=inline
QMimeData* mimeData ( const QModelIndexList indexes ) const [inline, virtual]

Returns the MIME data that dropMimeData() can use to create new items.

Reimplemented from QAbstractItemModel.

Definition at line 264 of file objectdescriptionmodel.h.

{ return d->mimeData(type, indexes); } //krazy:exclude=inline
void moveUp ( const QModelIndex index ) [inline]

Moves the item at the given index up.

In the resulting list the items at index.row() and index.row() - 1 are swapped.

Connected views are updated automatically.

Definition at line 272 of file objectdescriptionmodel.h.

{ d->moveUp(index); } //krazy:exclude=inline
void moveDown ( const QModelIndex index ) [inline]

Moves the item at the given index down.

In the resulting list the items at index.row() and index.row() + 1 are swapped.

Connected views are updated automatically.

Definition at line 280 of file objectdescriptionmodel.h.

{ d->moveDown(index); } //krazy:exclude=inline
void setModelData ( const QList< ObjectDescription< type > > &  data ) [inline]

Sets the model data using the list provided by data.

All previous model data is cleared.

Definition at line 300 of file objectdescriptionmodel.h.

                                                                                  { //krazy:exclude=inline
                QList<QExplicitlySharedDataPointer<ObjectDescriptionData> > list;
                for (int i = 0; i < data.count(); ++i) {
                    list += data.at(i).d;
                }
                d->setModelData(list);
            }
QList<ObjectDescription<type> > modelData ( ) const [inline]

Returns the model data.

As the order of the list might have changed this can be different to what was set using setModelData().

Definition at line 314 of file objectdescriptionmodel.h.

                                                                     { //krazy:exclude=inline
                QList<ObjectDescription<type> > ret;
                QList<QExplicitlySharedDataPointer<ObjectDescriptionData> > list = d->modelData();
                for (int i = 0; i < list.count(); ++i) {
                    ret << ObjectDescription<type>(list.at(i));
                }
                return ret;
            }
ObjectDescription<type> modelData ( const QModelIndex index ) const [inline]

Returns one ObjectDescription of the model data for the given index.

Definition at line 326 of file objectdescriptionmodel.h.

{ return ObjectDescription<type>(d->modelData(index)); } //krazy:exclude=inline
Qt::DropActions supportedDropActions ( ) const [inline, virtual]

This model supports drag and drop to copy or move items.

Reimplemented from QAbstractItemModel.

Definition at line 332 of file objectdescriptionmodel.h.

{ return d->supportedDropActions(); } //krazy:exclude=inline
bool dropMimeData ( const QMimeData data,
Qt::DropAction  action,
int  row,
int  column,
const QModelIndex parent 
) [inline, virtual]

Accept drops from other models of the same ObjectDescriptionType.

If a valid parent is given the dropped items will be inserted above that item.

Reimplemented from QAbstractListModel.

Definition at line 340 of file objectdescriptionmodel.h.

                                                                                                                                 { //krazy:exclude=inline
                return d->dropMimeData(type, data, action, row, column, parent);
            }
bool removeRows ( int  row,
int  count,
const QModelIndex parent = QModelIndex() 
) [inline, virtual]

Removes count rows starting with the given row.

If a valid parent is given no rows are removed since this is a list model.

Returns true if the rows were successfully removed; otherwise returns false.

Reimplemented from QAbstractItemModel.

Definition at line 352 of file objectdescriptionmodel.h.

                                                                                                  { //krazy:exclude=inline
                return d->removeRows(row, count, parent);
            }
QStringList mimeTypes ( ) const [inline, virtual]

Returns a list of supported drag and drop MIME types.

Currently it only supports one type used internally.

Reimplemented from QAbstractItemModel.

Definition at line 360 of file objectdescriptionmodel.h.

{ return d->mimeTypes(type); } //krazy:exclude=inline

Member Data Documentation

Q_OBJECT_CHECK PHONON_TEMPLATE_CLASS_MEMBER_EXPORT const QMetaObject staticMetaObject [static]

The documentation for this class was generated from the following file: