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.
QLandmarkIntersectionFilter::~QLandmarkIntersectionFilter () [virtual]
Destroys the filter.
void QLandmarkIntersectionFilter::append ( const QLandmarkFilter & filter )
Appends the given filter to the list of intersected filters
See also operator<<(), prepend(), and filters().
void QLandmarkIntersectionFilter::clear ()
Removes all filters from the list of intersected filters.
QList<QLandmarkFilter> QLandmarkIntersectionFilter::filters () const
Returns the list of filters which form the intersection filter
See also setFilters(), prepend(), append(), and remove().
void QLandmarkIntersectionFilter::prepend ( const QLandmarkFilter & filter )
Prepends the given filter to the list of intersected filters
See also append() and filters().
void QLandmarkIntersectionFilter::remove ( const QLandmarkFilter & filter )
Removes the given filter from the list of intersected filters.
See also filters(), append(), and prepend().
void QLandmarkIntersectionFilter::setFilters ( const QList<QLandmarkFilter> & filters )
Sets the filters whose criteria will be intersected.
See also filters().
QLandmarkIntersectionFilter & QLandmarkIntersectionFilter::operator<< ( const QLandmarkFilter & filter )
Appends the given filter to the list of intersected filters
See also append().
