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https://github.com/qgis/QGIS.git
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45f374f428
- Add QgsDataDefined class - Add QgsDataDefinedButton class - Add data defined Python support - Add standalone SVG selector dialog to QgsSvgSelectorWidget class - Fix for #4607, show only pertinent fields when setting a data defined value - Fix for #5048 and #5049, data defined settings are literally used - Fix for #5726, number formatting does not work for expressions - Fix for #7755, using bufferSize to enable/disable label buffer is confusing - Fix for #7779, labels do not register in label collision engine; and for #4719, inactive options in labeling dialog - Prepare label text's expression upfront when preparing layer; makes rendering much faster - Change name of 'feature obstacles' to appropriate terminology
54 lines
1.4 KiB
Plaintext
54 lines
1.4 KiB
Plaintext
/** \ingroup core
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* \class QgsDataDefined
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* A container class for data source field mapping or expression.
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* @note added in QGIS 1.9
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*/
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class QgsDataDefined
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{
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%TypeHeaderCode
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#include <qgsdatadefined.h>
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%End
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public:
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/**
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* Construct a new data defined object
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*
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* @param parent The parent QWidget
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* @param active Whether the current data defined is active
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* @param useexpr Whether to use expression instead of field
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* @param expr Expression string
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* @param field Field name string
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*/
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QgsDataDefined( bool active = false,
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bool useexpr = false,
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const QString& expr = QString(),
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const QString& field = QString() );
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~QgsDataDefined();
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bool isActive() const;
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void setActive( bool active );
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bool useExpression() const;
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void setUseExpression( bool use );
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QString expressionString() const;
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void setExpressionString( const QString& expr );
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//QMap<QString, QVariant> expressionParams() const;
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//void setExpressionParams( QMap<QString, QVariant> params );
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void insertExpressionParam( QString key, QVariant param );
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bool prepareExpression( QgsVectorLayer* layer );
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bool expressionIsPrepared() const;
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QgsExpression* expression();
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QStringList referencedColumns( QgsVectorLayer* layer );
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QString field() const;
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void setField( const QString& field );
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//QMap< QString, QString > toMap();
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};
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