mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-27 00:33:48 -05:00
c49b5b777f
Rationale: - there was a lot of large objects passed by value, so potentially there's a speed bump from this - even for implicitly shared classes like QString/QList there's still a (small) cost for copying the objects when there's no reason to - it's the right thing to do!
64 lines
2.0 KiB
Plaintext
64 lines
2.0 KiB
Plaintext
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/**
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* @brief The QgsMapLayerModel class is a model to display layers in widgets.
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* @see QgsMapLayerProxyModel to sort and/filter the layers
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* @see QgsFieldModel to combine in with a field selector.
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* @note added in 2.3
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*/
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class QgsMapLayerModel : QAbstractItemModel
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{
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%TypeHeaderCode
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#include "qgsmaplayermodel.h"
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%End
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public:
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static const int LayerIdRole;
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/**
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* @brief QgsMapLayerModel creates a model to display layers in widgets.
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*/
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explicit QgsMapLayerModel( QObject *parent /TransferThis/ = 0 );
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/**
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* @brief QgsMapLayerModel creates a model to display a specific list of layers in a widget.
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*/
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explicit QgsMapLayerModel( const QList<QgsMapLayer*>& layers, QObject *parent /TransferThis/ = 0 );
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/**
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* @brief setItemsCheckable defines if layers should be selectable in the widget
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*/
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void setItemsCheckable( bool checkable );
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/**
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* @brief checkAll changes the checkstate for all the layers
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*/
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void checkAll( Qt::CheckState checkState );
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/**
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* @brief layersChecked returns the list of layers which are checked (or unchecked)
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*/
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QList<QgsMapLayer*> layersChecked( Qt::CheckState checkState = Qt::Checked );
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//! returns if the items can be checked or not
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bool itemsCheckable() const;
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/**
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* @brief indexFromLayer returns the model index for a given layer
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*/
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QModelIndex indexFromLayer( QgsMapLayer* layer ) const;
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protected slots:
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void removeLayers( const QStringList& layerIds );
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void addLayers( const QList<QgsMapLayer*>& layers );
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// QAbstractItemModel interface
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public:
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QModelIndex index( int row, int column, const QModelIndex &parent = QModelIndex() ) const;
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QModelIndex parent( const QModelIndex &child ) const;
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int rowCount( const QModelIndex &parent ) const;
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int columnCount( const QModelIndex &parent ) const;
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QVariant data( const QModelIndex &index, int role ) const;
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bool setData( const QModelIndex &index, const QVariant &value, int role );
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Qt::ItemFlags flags( const QModelIndex &index ) const;
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};
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