MeeGo 1.2 Harmattan Developer Documentation Develop for the Nokia N9

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QLandmarkIntersectionFilter Class Reference

The QLandmarkIntersectionFilter class provides a filter which intersects the results of its constituent filters. More...

 #include <QLandmarkIntersectionFilter>

Inherits: QLandmarkFilter.

This class was introduced in Qt Mobility 1.1.

Public Functions

QLandmarkIntersectionFilter ()
QLandmarkIntersectionFilter ( const QLandmarkFilter & other )
virtual ~QLandmarkIntersectionFilter ()
void append ( const QLandmarkFilter & filter )
void clear ()
QList<QLandmarkFilter> filters () const
void prepend ( const QLandmarkFilter & filter )
void remove ( const QLandmarkFilter & filter )
void setFilters ( const QList<QLandmarkFilter> & filters )
QLandmarkIntersectionFilter & operator<< ( const QLandmarkFilter & filter )

Detailed Description

The QLandmarkIntersectionFilter class provides a filter which intersects the results of its constituent filters.

Conceptually it performs an AND operation and thus may be used to select landmarks which match all of it's constituent filters. If the intersection filter contains a proximity filter at the top level (i.e. which is not nested inside another filter) then the landmarks will be sorted by distance according to that filter. Note that a using sort order other than QLandmarkSortOrder (i.e. no sort) will override the sorting by distance).

Whether an intersection filter can be comprised of compound filters (i.e. union or intersection filters) is backend specific. Even if this is supported the performance of such a filter is likely to be poor.

Member Function Documentation

QLandmarkIntersectionFilter::QLandmarkIntersectionFilter ()

Constructs an intersection filter.

QLandmarkIntersectionFilter::QLandmarkIntersectionFilter ( const QLandmarkFilter & other )

Constructs a copy of other if possible, otherwise constructs a new intersection filter.

This function was introduced in Qt Mobility 1.1.

QLandmarkIntersectionFilter::~QLandmarkIntersectionFilter () [virtual]

Destroys the filter.

void QLandmarkIntersectionFilter::append ( const QLandmarkFilter & filter )

Appends the given filter to the list of intersected filters

This function was introduced in Qt Mobility 1.1.

See also operator<<(), prepend(), and filters().

void QLandmarkIntersectionFilter::clear ()

Removes all filters from the list of intersected filters.

This function was introduced in Qt Mobility 1.1.

QList<QLandmarkFilter> QLandmarkIntersectionFilter::filters () const

Returns the list of filters which form the intersection filter

This function was introduced in Qt Mobility 1.1.

See also setFilters(), prepend(), append(), and remove().

void QLandmarkIntersectionFilter::prepend ( const QLandmarkFilter & filter )

Prepends the given filter to the list of intersected filters

This function was introduced in Qt Mobility 1.1.

See also append() and filters().

void QLandmarkIntersectionFilter::remove ( const QLandmarkFilter & filter )

Removes the given filter from the list of intersected filters.

This function was introduced in Qt Mobility 1.1.

See also filters(), append(), and prepend().

void QLandmarkIntersectionFilter::setFilters ( const QList<QLandmarkFilter> & filters )

Sets the filters whose criteria will be intersected.

This function was introduced in Qt Mobility 1.1.

See also filters().

QLandmarkIntersectionFilter & QLandmarkIntersectionFilter::operator<< ( const QLandmarkFilter & filter )

Appends the given filter to the list of intersected filters

This function was introduced in Qt Mobility 1.1.

See also append().

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