juce::SparseSet< Type > Class Template Reference

Holds a set of primitive values, storing them as a set of ranges. More...

Public Member Functions
	SparseSet ()=default
	SparseSet (const SparseSet &)=default
SparseSet &	operator= (const SparseSet &)=default
	SparseSet (SparseSet &&other) noexcept
SparseSet &	operator= (SparseSet &&other) noexcept
void	clear ()
	Clears the set.
bool	isEmpty () const noexcept
	Checks whether the set is empty.
Type	size () const noexcept
	Returns the number of values in the set.
Type	operator[] (Type index) const noexcept
	Returns one of the values in the set.
bool	contains (Type valueToLookFor) const noexcept
	Checks whether a particular value is in the set.
int	getNumRanges () const noexcept
	Returns the number of contiguous blocks of values.
Range< Type >	getRange (int rangeIndex) const noexcept
	Returns one of the contiguous ranges of values stored.
Range< Type >	getTotalRange () const noexcept
	Returns the range between the lowest and highest values in the set.
void	addRange (Range< Type > range)
	Adds a range of contiguous values to the set.
void	removeRange (Range< Type > rangeToRemove)
	Removes a range of values from the set.
void	invertRange (Range< Type > range)
	Does an XOR of the values in a given range.
bool	overlapsRange (Range< Type > range) const noexcept
	Checks whether any part of a given range overlaps any part of this set.
bool	containsRange (Range< Type > range) const noexcept
	Checks whether the whole of a given range is contained within this one.
const Array< Range< Type > > &	getRanges () const noexcept
	Returns the set as a list of ranges, which you may want to iterate over.
bool	operator== (const SparseSet &other) const noexcept
bool	operator!= (const SparseSet &other) const noexcept

Detailed Description

template<class Type>
class juce::SparseSet< Type >

Holds a set of primitive values, storing them as a set of ranges.

This container acts like an array, but can efficiently hold large contiguous ranges of values. It's quite a specialised class, mostly useful for things like keeping the set of selected rows in a listbox.

The type used as a template parameter must be an integer type, such as int, short, int64, etc.

Constructor & Destructor Documentation

SparseSet() [1/3]

template<class Type >

juce::SparseSet< Type >::SparseSet ( )

default

SparseSet() [2/3]

template<class Type >

juce::SparseSet< Type >::SparseSet ( const SparseSet< Type > &  )

default

SparseSet() [3/3]

template<class Type >

juce::SparseSet< Type >::SparseSet ( SparseSet< Type > &&  other )

inlinenoexcept

Member Function Documentation

operator=() [1/2]

template<class Type >

SparseSet & juce::SparseSet< Type >::operator= ( const SparseSet< Type > &  )

default

operator=() [2/2]

template<class Type >

SparseSet & juce::SparseSet< Type >::operator= ( SparseSet< Type > &&  other )

inlinenoexcept

clear()

template<class Type >

void juce::SparseSet< Type >::clear ( )

inline

Clears the set.

isEmpty()

template<class Type >

bool juce::SparseSet< Type >::isEmpty ( ) const

inlinenoexcept

Checks whether the set is empty.

This is much quicker than using (size() == 0).

size()

template<class Type >

Type juce::SparseSet< Type >::size ( ) const

inlinenoexcept

Returns the number of values in the set.

Because of the way the data is stored, this method can take longer if there are a lot of items in the set. Use isEmpty() for a quick test of whether there are any items.

operator[]()

template<class Type >

Type juce::SparseSet< Type >::operator[] ( Type  index ) const

inlinenoexcept

Returns one of the values in the set.

Parameters

index

the index of the value to retrieve, in the range 0 to (size() - 1).

Returns

the value at this index, or 0 if it's out-of-range

References juce::end().

contains()

template<class Type >

bool juce::SparseSet< Type >::contains ( Type  valueToLookFor ) const

inlinenoexcept

Checks whether a particular value is in the set.

getNumRanges()

template<class Type >

int juce::SparseSet< Type >::getNumRanges ( ) const

inlinenoexcept

Returns the number of contiguous blocks of values.

See also

getRange

getRange()

template<class Type >

Range< Type > juce::SparseSet< Type >::getRange ( int  rangeIndex ) const

inlinenoexcept

Returns one of the contiguous ranges of values stored.

Parameters

rangeIndex

the index of the range to look up, between 0 and (getNumRanges() - 1)

See also

getTotalRange

getTotalRange()

template<class Type >

Range< Type > juce::SparseSet< Type >::getTotalRange ( ) const

inlinenoexcept

Returns the range between the lowest and highest values in the set.

See also

getRange

Referenced by juce::SparseSet< Type >::removeRange().

addRange()

template<class Type >

void juce::SparseSet< Type >::addRange ( Range< Type >  range )

inline

Adds a range of contiguous values to the set.

e.g. addRange (Range <int> (10, 14)) will add (10, 11, 12, 13) to the set.

References juce::SparseSet< Type >::removeRange().

Referenced by juce::SparseSet< Type >::invertRange().

removeRange()

template<class Type >

void juce::SparseSet< Type >::removeRange ( Range< Type >  rangeToRemove )

inline

Removes a range of values from the set.

e.g. removeRange (Range<int> (10, 14)) will remove (10, 11, 12, 13) from the set.

References juce::SparseSet< Type >::getTotalRange(), and jassert.

Referenced by juce::SparseSet< Type >::addRange(), and juce::SparseSet< Type >::invertRange().

invertRange()

template<class Type >

void juce::SparseSet< Type >::invertRange ( Range< Type >  range )

inline

Does an XOR of the values in a given range.

References juce::SparseSet< Type >::addRange(), and juce::SparseSet< Type >::removeRange().

overlapsRange()

template<class Type >

bool juce::SparseSet< Type >::overlapsRange ( Range< Type >  range ) const

inlinenoexcept

Checks whether any part of a given range overlaps any part of this set.

containsRange()

template<class Type >

bool juce::SparseSet< Type >::containsRange ( Range< Type >  range ) const

inlinenoexcept

Checks whether the whole of a given range is contained within this one.

getRanges()

template<class Type >

const Array< Range< Type > > & juce::SparseSet< Type >::getRanges ( ) const

inlinenoexcept

Returns the set as a list of ranges, which you may want to iterate over.

operator==()

template<class Type >

bool juce::SparseSet< Type >::operator== ( const SparseSet< Type > &  other ) const

inlinenoexcept

operator!=()

template<class Type >

bool juce::SparseSet< Type >::operator!= ( const SparseSet< Type > &  other ) const

inlinenoexcept

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

• juce_core/containers/juce_SparseSet.h