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64 lines
2.1 KiB
Plaintext
64 lines
2.1 KiB
Plaintext
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/**
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* @brief The QgsFieldModel class is a model to display the list of fields of a layer in widgets.
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* If allowed, expressions might be added to the end of the model.
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* It can be associated with a QgsMapLayerModel to dynamically display a layer and its fields.
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* @note added in 2.3
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*/
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class QgsFieldModel : QAbstractItemModel
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{
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%TypeHeaderCode
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#include "qgsfieldmodel.h"
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%End
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public:
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enum FieldRoles {
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/* SIP does not accept any arithmetic" */
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FieldNameRole = 33, /* return field name if index corresponds to a field */
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FieldIndexRole = 34, /* return field index if index corresponds to a field */
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ExpressionRole = 35, /* return field name or expression */
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IsExpressionRole = 36, /* return if index corresponds to an expression */
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ExpressionValidityRole = 37 /* return if expression is valid or not */
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};
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/**
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* @brief QgsFieldModel creates a model to display the fields of a given layer
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*/
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explicit QgsFieldModel( QObject *parent /TransferThis/ = 0 );
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//! return the index corresponding to a given fieldName
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QModelIndex indexFromName( QString fieldName );
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//! returns the currently used layer
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void setAllowExpression( bool allowExpression );
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bool allowExpression();
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/**
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* @brief setExpression sets a single expression to be added after the fields at the end of the model
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* @return the model index of the newly added expression
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*/
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QModelIndex setExpression( QString expression );
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//! remove expressions from the model
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void removeExpression();
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//! returns the currently used layer
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QgsVectorLayer* layer();
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public slots:
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//! set the layer of whch fields are displayed
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void setLayer( QgsMapLayer *layer );
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protected slots:
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virtual void updateModel();
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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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};
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