Cairo::Path::const_iterator Class Reference

A custom const_iterator for iterating over a Path. More...

#include <cairomm/path.h>

Public Types
using	iterator_category = std::forward_iterator_tag
using	value_type = const Element
using	difference_type = std::ptrdiff_t
using	pointer = const Element *
using	reference = const Element &

Public Member Functions
bool	operator== (const const_iterator &iter) const
bool	operator!= (const const_iterator &iter) const
const_iterator &	operator++ ()
const_iterator	operator++ (int)
reference	operator* ()
pointer	operator-> ()

Protected Member Functions
	const_iterator (cairo_path_data_t *path_data)

Protected Attributes
Element	m_node

Detailed Description

A custom const_iterator for iterating over a Path.

This is made slightly complicated because each element can have different numbers of sub-elements, so advancing the const_iterator must advance the base pointer a different amount based on the current element.

Also, because of the way the base cairo path structure is set up, you can only traverse the list forward, because the only guarantee about the structure is that the first element is a header type which tells the location of the next header.

Since cairomm 1.20:

Examples

path-iter.cc.

Member Typedef Documentation

difference_type

using Cairo::Path::const_iterator::difference_type = std::ptrdiff_t

iterator_category

using Cairo::Path::const_iterator::iterator_category = std::forward_iterator_tag

pointer

using Cairo::Path::const_iterator::pointer = const Element*

reference

using Cairo::Path::const_iterator::reference = const Element&

value_type

using Cairo::Path::const_iterator::value_type = const Element

Constructor & Destructor Documentation

const_iterator()

Cairo::Path::const_iterator::const_iterator ( cairo_path_data_t *  path_data )

protected

Member Function Documentation

operator!=()

bool Cairo::Path::const_iterator::operator!= ( const const_iterator &  iter ) const

inline

operator*()

reference Cairo::Path::const_iterator::operator* ( )

inline

operator++() [1/2]

const_iterator & Cairo::Path::const_iterator::operator++

(

)

operator++() [2/2]

const_iterator Cairo::Path::const_iterator::operator++

(

int

)

operator->()

pointer Cairo::Path::const_iterator::operator-> ( )

inline

operator==()

bool Cairo::Path::const_iterator::operator== ( const const_iterator &  iter ) const

inline

Member Data Documentation

m_node

Element Cairo::Path::const_iterator::m_node

protected

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

• cairomm/path.h