VectorAccessor< VECTOR > Class Template Reference

Accessor for items that are STL compatible vectors. More...

#include <vigra/accessor.hxx>

Inheritance diagram for VectorAccessor< VECTOR >:

Public Types
typedef VECTOR::value_type	component_type
typedef VectorElementAccessor< VectorAccessor< VECTOR > >	ElementAccessor
Public Types inherited from SequenceAccessor< VECTOR >
typedef VECTOR::value_type	component_type
Public Types inherited from StandardAccessor< VECTOR >
typedef VECTOR	value_type

Public Member Functions
template<class ITERATOR>
component_type const &	getComponent (ITERATOR const &i, int idx) const
template<class ITERATOR, class OFFSET>
component_type const &	getComponent (ITERATOR const &i, OFFSET const &diff, int idx) const
template<class V, class ITERATOR>
void	setComponent (V const &value, ITERATOR const &i, int idx) const
template<class V, class ITERATOR, class OFFSET>
void	setComponent (V const &value, ITERATOR const &i, OFFSET const &diff, int idx) const
Public Member Functions inherited from SequenceAccessor< VECTOR >
iterator	begin (ITERATOR const &i) const
iterator	end (ITERATOR const &i) const
unsigned int	size (ITERATOR const &i) const
Public Member Functions inherited from StandardAccessor< VECTOR >
VECTOR const &	operator() (ITERATOR const &i) const
void	set (V const &value, ITERATOR const &i) const

Detailed Description

template<class VECTOR>
class vigra::VectorAccessor< VECTOR >

Accessor for items that are STL compatible vectors.

It encapsulates access to a vector's access functionality.

Usage:

#include <vigra/accessor.hxx>
Namespace: vigra

The accessor has two modes of operation:

1. Access the vector's iterator via the begin() and end() functions:

   typedef std::list<std::vector<int> > ListOfVectors;
    
   ListOfVectors ll;
   ...
    
   typedef vigra::SequenceAccessor<ListOfVectors::value_type> ListOfVectorsAccessor;
   ListOfVectorsAccessor a;
   for(ListOfVectors::iterator li = ll.begin(); li != ll.end(); ++li)
   {
       for(ListOfVectorsAccessor::iterator i = a.begin(li); i != a.end(li); ++i)
       {
           *i = 10;
       }
   }

2. Access the vector's components via an index (internally calls the vector's operator[] ):

   typedef std::list<std::vector<int> > ListOfVectors;
    
   ListOfVectors ll;
   ...
    
   typedef vigra::SequenceAccessor<ListOfVectors::value_type> ListOfVectorsAccessor;
   ListOfVectorsAccessor a;
   for(ListOfVectors::iterator li = ll.begin(); li != ll.end(); ++li)
   {
       for(int i = 0; i != a.size(li); ++i)
       {
           a.setComponent(10, li, i);
       }
   }

Required Interface:

VECTOR v;
VECTOR::iterator i;
value_type d;
int index;
 
d = v[index];
v[index] = d;
i = v.begin();
i = v.end();
v.size();

Member Typedef Documentation

component_type

template<class VECTOR>

typedef VECTOR::value_type component_type

the vector's value_type

ElementAccessor

template<class VECTOR>

typedef VectorElementAccessor<VectorAccessor<VECTOR> > ElementAccessor

the vector element accessor associated with this vector accessor (see VectorElementAccessor)

Member Function Documentation

getComponent() [1/2]

template<class VECTOR>

template<class ITERATOR>

component_type const & getComponent	(	ITERATOR const &	i,
		int	idx ) const

Read the component data at given vector index at given iterator position

setComponent() [1/2]

template<class VECTOR>

template<class V, class ITERATOR>

void setComponent	(	V const &	value,
		ITERATOR const &	i,
		int	idx ) const

Set the component data at given vector index at given iterator position. The type V of the passed in value is automatically converted to component_type. In case of a conversion floating point -> integral this includes rounding and clipping.

getComponent() [2/2]

template<class VECTOR>

template<class ITERATOR, class OFFSET>

component_type const & getComponent	(	ITERATOR const &	i,
		OFFSET const &	diff,
		int	idx ) const

Read the component data at given vector index at an offset of given iterator position

setComponent() [2/2]

template<class VECTOR>

template<class V, class ITERATOR, class OFFSET>

void setComponent	(	V const &	value,
		ITERATOR const &	i,
		OFFSET const &	diff,
		int	idx ) const

Set the component data at given vector index at an offset of given iterator position. The type V of the passed in value is automatically converted to component_type. In case of a conversion floating point -> integral this includes rounding and clipping.

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

• vigra/accessor.hxx