QGIS API Documentation
3.26.3-Buenos Aires (65e4edfdad)
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24 : QSortFilterProxyModel( parent )
37 mCheckedLayers = layers;
49 if ( idx.column() == 0 )
51 return Qt::ItemIsEnabled | Qt::ItemIsUserCheckable;
53 return Qt::NoItemFlags;
58 QModelIndex newIndex = QSortFilterProxyModel::index( row, 0,
parent );
62 return createIndex( row, column, newIndex.internalId() );
67 return QSortFilterProxyModel::parent( createIndex( child.row(), 0, child.internalId() ) );
72 const QModelIndex
parent = idx.parent();
79 if ( idx.column() == 0 )
81 node = mLayerTreeModel->
index2node( mapToSource( idx ) );
92 if ( filterText == mFilterText )
95 mFilterText = filterText;
101 return mLayerTreeModel;
119 return nodeShown( node );
124 return mCheckedLayers.contains( layer );
131 mCheckedLayers << layer;
135 mCheckedLayers.removeAll( layer );
139 void QgsLayerTreeFilterProxyModel::setLayerCheckedPrivate(
QgsMapLayer *layer,
bool checked )
147 const QModelIndex
index = mapFromSource( mLayerTreeModel->
node2index( node ) );
154 bool QgsLayerTreeFilterProxyModel::layerShown(
QgsMapLayer *layer )
const
160 bool QgsLayerTreeFilterProxyModel::nodeShown(
QgsLayerTreeNode *node )
const
166 const auto constChildren = node->
children();
169 if ( nodeShown( child ) )
181 if ( !mFilterText.isEmpty() && !layer->
name().contains( mFilterText, Qt::CaseInsensitive ) )
186 return layerShown( layer );
192 if ( idx.column() == 0 )
194 if ( role == Qt::CheckStateRole )
205 return Qt::Unchecked;
211 bool hasChecked =
false, hasUnchecked =
false;
213 for ( n = 0; !hasChecked || !hasUnchecked; n++ )
215 const QVariant v =
data(
index( n, 0, idx ), role );
221 case Qt::PartiallyChecked:
223 return Qt::PartiallyChecked;
237 return Qt::Unchecked;
240 if ( hasChecked && hasUnchecked )
241 return Qt::PartiallyChecked;
246 Q_ASSERT( hasUnchecked );
247 return Qt::Unchecked;
252 return mLayerTreeModel->
data( mapToSource( idx ), role );
260 if (
index.column() == 0 )
262 if ( role == Qt::CheckStateRole )
268 if ( !child.isValid() )
281 if ( value.toInt() == Qt::Checked )
282 setLayerCheckedPrivate( layer,
true );
283 else if ( value.toInt() == Qt::Unchecked )
284 setLayerCheckedPrivate( layer,
false );
292 return mLayerTreeModel->
setData( mapToSource(
index ), value, role );
@ NodeGroup
Container of other groups and layers.
virtual bool setData(const QModelIndex &index, const QVariant &value, int role) override
QgsLayerTreeLayer * findLayer(QgsMapLayer *layer) const
Find layer node representing the map layer.
This class is a base class for nodes in a layer tree.
QModelIndex index(int row, int column, const QModelIndex &parent=QModelIndex()) const override
static bool layerMatchesFilters(const QgsMapLayer *layer, const Filters &filters)
Returns if the layer matches the given filters.
virtual QVariant data(const QModelIndex &index, int role) const override
static QgsProject * instance()
Returns the QgsProject singleton instance.
QModelIndex parent(const QModelIndex &child) const override
void readProject(const QDomDocument &)
Emitted when a project is being read.
static QgsLayerTreeLayer * toLayer(QgsLayerTreeNode *node)
Cast node to a layer.
The QgsLayerTreeModel class is model implementation for Qt item views framework.
virtual void setLayerChecked(QgsMapLayer *layer, bool checked)
This will set if the layer is checked or not.
NodeType nodeType() const
Find out about type of the node. It is usually shorter to use convenience functions from QgsLayerTree...
void setFilters(const QgsMapLayerProxyModel::Filters &filters)
Defines the type layers (vector, raster, etc) shown in the tree If the list is empty,...
virtual bool isLayerChecked(QgsMapLayer *layer) const
Returns if the layer is checked or not.
QModelIndex node2index(QgsLayerTreeNode *node) const
Returns index for a given node. If the node does not belong to the layer tree, the result is undefine...
QModelIndex index(int row, int column, const QModelIndex &parent=QModelIndex()) const override
QgsLayerTreeModel * layerTreeModel() const
Rerturns the layer tree model.
virtual Qt::ItemFlags flags(const QModelIndex &idx) const override
void setLayerTreeModel(QgsLayerTreeModel *layerTreeModel)
Sets the layer tree model.
void setCheckedLayers(const QList< QgsMapLayer * > layers)
Initialize the list of checked layers.
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override
QModelIndex sibling(int row, int column, const QModelIndex &idx) const override
QgsMapLayer * layer() const
Returns the map layer associated with this node.
QgsLayerTree * rootGroup() const
Returns pointer to the root node of the layer tree. Always a non nullptr value.
QgsLayerTreeNode * index2node(const QModelIndex &index) const
Returns layer tree node for given index.
static bool isLayer(const QgsLayerTreeNode *node)
Check whether the node is a valid layer node.
virtual int columnCount(const QModelIndex &parent) const override
Base class for all map layer types. This is the base class for all map layer types (vector,...
QList< QgsLayerTreeNode * > children()
Gets list of children of the node. Children are owned by the parent.
QgsLayerTreeFilterProxyModel(QObject *parent=nullptr)
Constructor.
bool setData(const QModelIndex &index, const QVariant &value, int role=Qt::EditRole) override
QgsMapLayer * mapLayer(const QModelIndex &idx) const
Returns the map layer at a given index.
QVariant data(const QModelIndex &index, int role=Qt::DisplayRole) const override
virtual void setFilterText(const QString &filterText=QString())
Sets the filter text to search for a layer in the tree.