QgsExpressionFieldBuffer Class Reference

Buffers information about expression fields for a vector layer. More...

#include <qgsexpressionfieldbuffer.h>

Classes
struct	ExpressionField

Public Types
typedef struct QgsExpressionFieldBuffer::ExpressionField	ExpressionField

Public Member Functions
	QgsExpressionFieldBuffer ()
void	addExpression (const QString &exp, const QgsField &fld)
	Add an expression to the buffer.
const QList< ExpressionField >	expressions () const
void	readXml (const QDomNode &layer_node)
	Reads expressions from project file.
void	removeExpression (int index)
	Remove an expression from the buffer.
void	updateFields (QgsFields &flds)
	Adds fields with the expressions buffered in this object to a QgsFields object.
void	writeXml (QDomNode &layer_node, QDomDocument &document) const
	Saves expressions to xml under the layer node.

Detailed Description

Buffers information about expression fields for a vector layer.

Note

added in 2.6

Definition at line 32 of file qgsexpressionfieldbuffer.h.

Member Typedef Documentation

typedef struct QgsExpressionFieldBuffer::ExpressionField QgsExpressionFieldBuffer::ExpressionField

Constructor & Destructor Documentation

QgsExpressionFieldBuffer::QgsExpressionFieldBuffer

(

)

Definition at line 22 of file qgsexpressionfieldbuffer.cpp.

Member Function Documentation

void QgsExpressionFieldBuffer::addExpression	(	const QString &	exp,
		const QgsField &	fld
	)

Add an expression to the buffer.

Parameters

exp	expression to add
fld	field to add

Definition at line 26 of file qgsexpressionfieldbuffer.cpp.

const QList<ExpressionField> QgsExpressionFieldBuffer::expressions ( ) const

inline

Definition at line 78 of file qgsexpressionfieldbuffer.h.

void QgsExpressionFieldBuffer::readXml

(

const QDomNode &

layer_node

)

Reads expressions from project file.

Definition at line 57 of file qgsexpressionfieldbuffer.cpp.

void QgsExpressionFieldBuffer::removeExpression

(

int

index

)

Remove an expression from the buffer.

Parameters

index

index of expression to remove

Definition at line 31 of file qgsexpressionfieldbuffer.cpp.

void QgsExpressionFieldBuffer::updateFields

(

QgsFields &

flds

)

Adds fields with the expressions buffered in this object to a QgsFields object.

Parameters

flds	The fields to be updated

Definition at line 83 of file qgsexpressionfieldbuffer.cpp.

void QgsExpressionFieldBuffer::writeXml	(	QDomNode &	layer_node,
		QDomDocument &	document
	)		const

Saves expressions to xml under the layer node.

Definition at line 36 of file qgsexpressionfieldbuffer.cpp.

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The documentation for this class was generated from the following files:

• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsexpressionfieldbuffer.h
• /tmp/buildd/qgis-2.8.2+12wheezy/src/core/qgsexpressionfieldbuffer.cpp