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QLandmarkAttributeFilter Class ReferenceThe QLandmarkAttributeFilter class provides filtering on various landmark attributes. More... #include <QLandmarkAttributeFilter> Inherits QLandmarkFilter. Public Types
Public Functions
Detailed DescriptionThe QLandmarkAttributeFilter class provides filtering on various landmark attributes. You can provide various keys which describe the attribute(s) to search. Precisely which keys may be used depends on the manager and these can be retrieved by using QLandmarkManager::searchableLandmarkAttributeKeys(). The table below outlines some keys that may be used with the default managers on the currently supported platforms. The match flags may be used for attributes which are of string type (typically most, if not all searchable attributes are string types).
Please note that different platforms support different capabilities with the attribute filter.
Member Type Documentation
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| Constant | Value | Description |
|---|---|---|
| QLandmarkAttributeFilter::AndOperation | 0 | Landmarks must match all the attributes provided by the filter. |
| QLandmarkAttributeFilter::OrOperation | 1 | Landmarks must match at least one attribute provided by the filter. |
Member Function Documentation
QLandmarkAttributeFilter::QLandmarkAttributeFilter ()
Creates an attribute filter.
QLandmarkAttributeFilter::QLandmarkAttributeFilter ( const QLandmarkFilter & other )
Constructs a copy of other if possible, otherwise constructs a new attribute filter.
QLandmarkAttributeFilter::~QLandmarkAttributeFilter () [virtual]
Destroys the filter.
QVariant QLandmarkAttributeFilter::attribute ( const QString & key ) const
Returns the value of the attribute corresponding to key.
If the attribute isn't set an invalid QVariant is returned.
See also setAttribute().
QStringList QLandmarkAttributeFilter::attributeKeys () const
Returns the keys of all attributes set in the filter.
void QLandmarkAttributeFilter::clearAttributes ()
Clears all attributes from the filter.
QLandmarkFilter::MatchFlags QLandmarkAttributeFilter::matchFlags ( const QString & key ) const
Returns the match flags for a particular key. The match flags are only take into consideration when the attribute for a particular key is a string. In all other cases the match flags are ignored.
OperationType QLandmarkAttributeFilter::operationType () const
Returns the operation to be used by the filter when multiple attributes are provided.
See also setOperationType().
void QLandmarkAttributeFilter::removeAttribute ( const QString & key )
Removes the attribute corresponding to key from the filter.
void QLandmarkAttributeFilter::setAttribute ( const QString & key, const QVariant & value, QLandmarkFilter::MatchFlags flags = 0 )
Sets the value of the attribute corresponding to key.
For string based attributes a set of matching flags can be provided to define how the string values should be matched. For non-string based attributes the flags are ignored. The beahviour of the filter is undefined if an invalid QVariant is used as a value
See also attribute().
void QLandmarkAttributeFilter::setAttributes ( const QStringList & keys, const QVariant & value, QLandmarkFilter::MatchFlags flags = 0 )
Sets the value of all the attributes correponding to those in keys.
For string based attributes a set of matching flags can be provided to define how the string values should be matched. For non-string based attributes the flags are ignored. The behaviour of the filter is undefined if an invalid QVariant is used as value.
void QLandmarkAttributeFilter::setOperationType ( OperationType operationType )
Sets the operation to be used by the filter when multiple attributes are provided to operationType.
See also operationType().