mirror of
https://github.com/qgis/QGIS.git
synced 2025-11-04 00:04:25 -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!
50 lines
1.7 KiB
Plaintext
50 lines
1.7 KiB
Plaintext
/** A generic dialog for building expression strings
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* @remarks This class also shows an example on how to use QgsExpressionBuilderWidget
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*/
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class QgsExpressionBuilderDialog : QDialog
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{
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%TypeHeaderCode
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#include <qgsexpressionbuilderdialog.h>
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%End
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public:
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QgsExpressionBuilderDialog( QgsVectorLayer* layer, const QString& startText = QString(), QWidget* parent /TransferThis/ = NULL, const QString& key = "generic",
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const QgsExpressionContext& context = QgsExpressionContext() );
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/** The builder widget that is used by the dialog */
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QgsExpressionBuilderWidget* expressionBuilder();
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void setExpressionText( const QString& text );
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QString expressionText();
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/** Returns the expression context for the dialog. The context is used for the expression
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* preview result and for populating the list of available functions and variables.
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* @see setExpressionContext
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* @note added in QGIS 2.12
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*/
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QgsExpressionContext expressionContext() const;
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/** Sets the expression context for the dialog. The context is used for the expression
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* preview result and for populating the list of available functions and variables.
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* @param context expression context
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* @see expressionContext
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* @note added in QGIS 2.12
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*/
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void setExpressionContext( const QgsExpressionContext& context );
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/** Sets geometry calculator used in distance/area calculations. */
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void setGeomCalculator( const QgsDistanceArea & da );
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protected:
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/**
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* Is called when the dialog get accepted or rejected
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* Used to save geometry
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*
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* @param r result value (unused)
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*/
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virtual void done( int r );
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virtual void accept();
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};
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