27 : QAbstractItemModel( parent )
28 , mProject( project ? project :
QgsProject::instance() )
35 : QAbstractItemModel( parent )
36 , mProject( project ? project :
QgsProject::instance() )
60 QMap<QString, Qt::CheckState>::iterator i =
mLayersChecked.begin();
72 if ( allowEmpty == mAllowEmpty )
77 beginInsertRows( QModelIndex(), 0, 0 );
83 beginRemoveRows( QModelIndex(), 0, 0 );
95 emit dataChanged(
index( 0, 0 ),
index(
rowCount() - 1, 0 ), QVector<int>() << Qt::DisplayRole );
100 QList<QgsMapLayer *> layers;
101 const auto constMLayers =
mLayers;
106 layers.append( layer );
114 QMap<QString, Qt::CheckState>::iterator i =
mLayersChecked.begin();
123 emit dataChanged(
index( 0, 0 ),
index(
rowCount() - 1, 0 ), QVector<int>() << Qt::CheckStateRole );
128 int r =
mLayers.indexOf( layer );
129 if ( r >= 0 && mAllowEmpty )
131 return index( r, 0 );
141 if ( items == mAdditionalItems )
151 if ( !mAdditionalItems.isEmpty() )
153 beginRemoveRows( QModelIndex(), offset, offset + mAdditionalItems.count() - 1 );
154 mAdditionalItems.clear();
159 beginInsertRows( QModelIndex(), offset, offset + items.count() - 1 );
160 mAdditionalItems = items;
169 QStringList layerIdsToRemove;
173 layerIdsToRemove << layer->id();
182 const QString layerId = layer->id();
201 for (
const QString &layerId : layerIds )
203 QModelIndex startIndex =
index( 0, 0 );
204 QModelIndexList list = match( startIndex,
LayerIdRole, layerId, 1 );
205 if ( !list.isEmpty() )
207 QModelIndex
index = list[0];
208 beginRemoveRows( QModelIndex(),
index.row(),
index.row() );
218 if ( !layers.empty( ) )
224 beginInsertRows( QModelIndex(),
mLayers.count() + offset,
mLayers.count() + layers.count() - 1 + offset );
225 const auto constLayers = layers;
241 if ( hasIndex( row, column,
parent ) )
244 if ( row - offset >= 0 && row - offset <
mLayers.count() )
245 layer =
mLayers.at( row - offset );
247 return createIndex( row, column, layer );
250 return QModelIndex();
257 return QModelIndex();
266 return ( mAllowEmpty ? 1 : 0 ) +
mLayers.length() + mAdditionalItems.count();
278 if ( !
index.isValid() )
281 bool isEmpty =
index.row() == 0 && mAllowEmpty;
282 int additionalIndex =
index.row() - ( mAllowEmpty ? 1 : 0 ) -
mLayers.count();
286 case Qt::DisplayRole:
289 if (
index.row() == 0 && mAllowEmpty )
292 if ( additionalIndex >= 0 )
293 return mAdditionalItems.at( additionalIndex );
299 if ( !mShowCrs || !layer->
isSpatial() || role == Qt::EditRole )
301 return layer->
name();
305 return tr(
"%1 [%2]" ).arg( layer->
name(), layer->
crs().
authid() );
311 if ( isEmpty || additionalIndex >= 0 )
315 return layer ? layer->
id() : QVariant();
320 if ( isEmpty || additionalIndex >= 0 )
323 return QVariant::fromValue<QgsMapLayer *>(
mLayers.value(
index.row() - ( mAllowEmpty ? 1 : 0 ) ) );
330 return additionalIndex >= 0;
332 case Qt::CheckStateRole:
336 if ( isEmpty || additionalIndex >= 0 )
346 case Qt::ToolTipRole:
353 if ( title.isEmpty() )
354 title = layer->
name();
355 title =
"<b>" + title +
"</b>";
358 if (
QgsVectorLayer *vl = qobject_cast<QgsVectorLayer *>( layer ) )
361 title = tr(
"%1 (%2) " ).arg( title, layer->
crs().
authid() );
366 parts <<
"<br/>" + layer->
abstract().replace( QLatin1String(
"\n" ), QLatin1String(
"<br/>" ) );
368 return parts.join( QLatin1String(
"<br/>" ) );
373 case Qt::DecorationRole:
376 return mEmptyIcon.isNull() ? QVariant() : mEmptyIcon;
378 if ( additionalIndex >= 0 )
394 QHash<int, QByteArray> roles = QAbstractItemModel::roleNames();
403 if ( !
index.isValid() )
406 return Qt::ItemIsDropEnabled;
408 return Qt::ItemFlags();
411 bool isEmpty =
index.row() == 0 && mAllowEmpty;
412 int additionalIndex =
index.row() - ( mAllowEmpty ? 1 : 0 ) -
mLayers.count();
414 Qt::ItemFlags
flags = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
416 if (
mCanReorder && !isEmpty && additionalIndex < 0 )
418 flags |= Qt::ItemIsDragEnabled;
423 flags |= Qt::ItemIsUserCheckable;
437 beginInsertRows(
parent, row, row + count - 1 );
438 for (
int i = row; i < row + count; ++i )
439 mLayers.insert( i - offset,
nullptr );
447 if (
parent.isValid() || row < 0 )
459 if ( row - offset >
mLayers.count() - 1 )
464 beginRemoveRows(
parent, row, row + count - 1 );
465 for (
int i = 0; i != count; ++i )
466 mLayers.removeAt( row - offset );
475 types << QStringLiteral(
"application/qgis.layermodeldata" );
481 if ( !
mCanReorder || action != Qt::MoveAction || !
data->hasFormat( QStringLiteral(
"application/qgis.layermodeldata" ) ) )
488 std::unique_ptr< QMimeData >
mimeData = std::make_unique< QMimeData >();
490 QByteArray encodedData;
491 QDataStream stream( &encodedData, QIODevice::WriteOnly );
492 QSet< QString > addedLayers;
494 for (
const QModelIndex &i : indexes )
499 if ( !addedLayers.contains(
id ) )
501 addedLayers.insert(
id );
506 mimeData->setData( QStringLiteral(
"application/qgis.layermodeldata" ), encodedData );
515 if ( action == Qt::IgnoreAction )
517 else if ( action != Qt::MoveAction )
520 QByteArray encodedData =
data->data( QStringLiteral(
"application/qgis.layermodeldata" ) );
521 QDataStream stream( &encodedData, QIODevice::ReadOnly );
522 QStringList newItems;
525 while ( !stream.atEnd() )
534 for (
const QString &text : std::as_const( newItems ) )
536 QModelIndex idx =
index( row, 0, QModelIndex() );
546 return Qt::MoveAction;
556 if ( !
index.isValid() )
559 bool isEmpty =
index.row() == 0 && mAllowEmpty;
560 int additionalIndex =
index.row() - ( mAllowEmpty ? 1 : 0 ) -
mLayers.count();
564 case Qt::CheckStateRole:
566 if ( !isEmpty && additionalIndex < 0 )
570 emit dataChanged(
index,
index, QVector< int >() << Qt::CheckStateRole );
577 if ( !isEmpty && additionalIndex < 0 )
bool isValid() const
Returns whether this CRS is correctly initialized and usable.
QString authid() const
Returns the authority identifier for the CRS.
static QIcon iconForLayer(const QgsMapLayer *layer)
Returns the icon corresponding to a specified map layer.
QList< QPointer< QgsMapLayer > > mAdditionalLayers
void setShowCrs(bool showCrs)
Sets whether the CRS of layers is also included in the model's display role.
void setItemsCanBeReordered(bool allow)
Sets whether items in the model can be reordered via drag and drop.
QHash< int, QByteArray > roleNames() const override
Returns strings for all roles supported by this model.
Qt::ItemFlags flags(const QModelIndex &index) const override
bool canDropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) const override
int rowCount(const QModelIndex &parent=QModelIndex()) const override
QList< QgsMapLayer * > layersChecked(Qt::CheckState checkState=Qt::Checked)
layersChecked returns the list of layers which are checked (or unchecked)
QVariant data(const QModelIndex &index, int role=Qt::DisplayRole) const override
bool insertRows(int row, int count, const QModelIndex &parent=QModelIndex()) override
QModelIndex parent(const QModelIndex &child) const override
bool removeRows(int row, int count, const QModelIndex &parent=QModelIndex()) override
QModelIndex index(int row, int column, const QModelIndex &parent=QModelIndex()) const override
@ EmptyRole
True if index corresponds to the empty (not set) value.
@ LayerIdRole
Stores the map layer ID.
@ LayerRole
Stores pointer to the map layer itself.
@ AdditionalRole
True if index corresponds to an additional (non map layer) item.
QModelIndex indexFromLayer(QgsMapLayer *layer) const
indexFromLayer returns the model index for a given layer
void setAllowEmptyLayer(bool allowEmpty, const QString &text=QString(), const QIcon &icon=QIcon())
Sets whether an optional empty layer ("not set") option is present in the model.
void setAdditionalItems(const QStringList &items)
Sets a list of additional (non map layer) items to include at the end of the model.
QList< QgsMapLayer * > additionalLayers() const
Returns the list of additional layers added to the model.
int columnCount(const QModelIndex &parent=QModelIndex()) const override
void setItemsCheckable(bool checkable)
setItemsCheckable defines if layers should be selectable in the widget
static QIcon iconForLayer(QgsMapLayer *layer)
Returns the icon corresponding to a specified map layer.
bool setData(const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
QgsMapLayer * layerFromIndex(const QModelIndex &index) const
Returns the map layer corresponding to the specified index.
Qt::DropActions supportedDropActions() const override
void setLayersChecked(const QList< QgsMapLayer * > &layers)
Sets which layers are checked in the model.
void checkAll(Qt::CheckState checkState)
checkAll changes the checkstate for all the layers
void removeLayers(const QStringList &layerIds)
QStringList mimeTypes() const override
bool dropMimeData(const QMimeData *data, Qt::DropAction action, int row, int column, const QModelIndex &parent) override
bool itemsCanBeReordered() const
Returns true if items in the model can be reordered via drag and drop.
QMap< QString, Qt::CheckState > mLayersChecked
QgsMapLayerModel(QObject *parent=nullptr, QgsProject *project=nullptr)
QgsMapLayerModel creates a model to display layers in widgets.
QList< QgsMapLayer * > mLayers
void setAdditionalLayers(const QList< QgsMapLayer * > &layers)
Sets a list of additional layers to include in the model.
void addLayers(const QList< QgsMapLayer * > &layers)
QMimeData * mimeData(const QModelIndexList &indexes) const override
Base class for all map layer types.
virtual bool isSpatial() const
Returns true if the layer is considered a spatial layer, ie it has some form of geometry associated w...
QString publicSource() const
Gets a version of the internal layer definition that has sensitive bits removed (for example,...
QgsCoordinateReferenceSystem crs
QString id() const
Returns the layer's unique ID, which is used to access this layer from QgsProject.
QString abstract() const
Returns the abstract of the layer used by QGIS Server in GetCapabilities request.
QString shortName() const
Returns the short name of the layer used by QGIS Server to identify the layer.
QString title() const
Returns the title of the layer used by QGIS Server in GetCapabilities request.
void willBeDeleted()
Emitted in the destructor when the layer is about to be deleted, but it is still in a perfectly valid...
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
Q_INVOKABLE QgsMapLayer * mapLayer(const QString &layerId) const
Retrieve a pointer to a registered layer by layer ID.
void layersWillBeRemoved(const QStringList &layerIds)
Emitted when one or more layers are about to be removed from the registry.
void layersAdded(const QList< QgsMapLayer * > &layers)
Emitted when one or more layers were added to the registry.
QMap< QString, QgsMapLayer * > mapLayers(const bool validOnly=false) const
Returns a map of all registered layers by layer ID.
Represents a vector layer which manages a vector based data sets.
static QString displayString(Type type) SIP_HOLDGIL
Returns a non-translated display string type for a WKB type, e.g., the geometry name used in WKT geom...