QgsAbstractFeatureIteratorFromSource< T > Class Template Reference

helper template that cares of two things: 1. More...

#include <qgsfeatureiterator.h>

Inheritance diagram for QgsAbstractFeatureIteratorFromSource< T >:

Public Member Functions
	QgsAbstractFeatureIteratorFromSource (T *source, bool ownSource, const QgsFeatureRequest &request)
	~QgsAbstractFeatureIteratorFromSource ()
Public Member Functions inherited from QgsAbstractFeatureIterator
	QgsAbstractFeatureIterator (const QgsFeatureRequest &request)
	base class constructor - stores the iteration parameters
virtual	~QgsAbstractFeatureIterator ()
	destructor makes sure that the iterator is closed properly
virtual bool	nextFeature (QgsFeature &f)
	fetch next feature, return true on success
virtual bool	rewind ()=0
	reset the iterator to the starting position
virtual bool	close ()=0
	end of iterating: free the resources / lock

Protected Member Functions
void	iteratorClosed ()
	to be called by from subclass in close()
Protected Member Functions inherited from QgsAbstractFeatureIterator
virtual bool	fetchFeature (QgsFeature &f)=0
	If you write a feature iterator for your provider, this is the method you need to implement!!
virtual bool	nextFeatureFilterExpression (QgsFeature &f)
	By default, the iterator will fetch all features and check if the feature matches the expression.
virtual bool	nextFeatureFilterFids (QgsFeature &f)
	By default, the iterator will fetch all features and check if the id is in the request.
void	ref ()
	add reference
void	deref ()
	remove reference, delete if refs == 0
virtual bool	prepareSimplification (const QgsSimplifyMethod &simplifyMethod)
	Setup the simplification of geometries to fetch using the specified simplify method.

Protected Attributes
T *	mSource
bool	mOwnSource
Protected Attributes inherited from QgsAbstractFeatureIterator
QgsFeatureRequest	mRequest
	A copy of the feature request.
bool	mClosed
	Set to true, as soon as the iterator is closed.
int	refs
	reference counting (to allow seamless copying of QgsFeatureIterator instances)

Detailed Description

template<typename T>
class QgsAbstractFeatureIteratorFromSource< T >

helper template that cares of two things: 1.

automatic deletion of source if owned by iterator, 2. notification of open/closed iterator

Constructor & Destructor Documentation

template<typename T>

QgsAbstractFeatureIteratorFromSource< T >::QgsAbstractFeatureIteratorFromSource ( T *  source, bool  ownSource, const QgsFeatureRequest &  request  )

inline

template<typename T>

QgsAbstractFeatureIteratorFromSource< T >::~QgsAbstractFeatureIteratorFromSource ( )

inline

Member Function Documentation

template<typename T>

void QgsAbstractFeatureIteratorFromSource< T >::iteratorClosed ( )

inlineprotected

to be called by from subclass in close()

Member Data Documentation

template<typename T>

bool QgsAbstractFeatureIteratorFromSource< T >::mOwnSource

protected

template<typename T>

T* QgsAbstractFeatureIteratorFromSource< T >::mSource

protected

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

• /tmp/buildd/qgis-2.6.0+wheezy1/src/core/qgsfeatureiterator.h