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git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@1009 c8812cc2-4d05-0410-92ff-de0c093fc19c
This commit is contained in:
gsherman 2004-03-10 23:22:02 +00:00
parent 1928a66e71
commit 7c89cffea3
1 changed files with 48 additions and 42 deletions
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90
src/qgsdataprovider.h
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@ -29,22 +29,28 @@ class QgsField;
class QgsDataProvider {
public:
/**
* Get the first feature resulting from a select operation
* @return QgsFeature
*/
virtual QgsFeature * QgsDataProvider::getFirstFeature(bool fetchAttributes=false)=0;
/**
* Get the next feature resutling from a select operation
* @return QgsFeature
*/
virtual QgsFeature * QgsDataProvider::getNextFeature(bool fetchAttributes=false)=0;
/**
* Get the first feature resulting from a select operation
* @return QgsFeature
*/
virtual QgsFeature * QgsDataProvider::getFirstFeature(bool fetchAttributes=false)=0;
/**
* Get the next feature resutling from a select operation
* @return QgsFeature
*/
virtual QgsFeature * QgsDataProvider::getNextFeature(bool fetchAttributes=false)=0;
/**
* Get the next feature using new method
* TODO - make this pure virtual once it works and change existing providers
* to use this method of fetching features
*/
/** Get feature type.
* Gets the feature type as defined in WKBTYPE (qgis.h).
* @return int representing the feature type
*/
virtual int geometryType()=0;
virtual bool getNextFeature(QgsFeature &feature, bool fetchAttributes=false)=0;
/** Get feature type.
* Gets the feature type as defined in WKBTYPE (qgis.h).
* @return int representing the feature type
*/
virtual int geometryType()=0;
/**
* Number of features in the layer
* @return long containing number of features
@ -54,49 +60,49 @@ public:
* Number of attribute fields for a feature in the layer
*/
virtual int fieldCount()=0;
/**
* Select features based on a bounding rectangle. Features can be retrieved
* with calls to getFirstFeature and getNextFeature. Request for features
/**
* Select features based on a bounding rectangle. Features can be retrieved
* with calls to getFirstFeature and getNextFeature. Request for features
* for use in drawing the map canvas should set useIntersect to false.
* @param mbr QgsRect containing the extent to use in selecting features
* @param mbr QgsRect containing the extent to use in selecting features
* @param useIntersect If true, use the intersects function to select features
* rather than the PostGIS && operator that selects based on bounding box
* overlap.
*
*/
virtual void QgsDataProvider::select(QgsRect *mbr, bool useIntersect=false)=0;
/**
* Set the data source specification. This may be a path or database
* connection string
* @param data source specification
*/
virtual void QgsDataProvider::setDataSourceUri(QString uri) = 0;
/**
* Get the data source specification. This may be a path or database
* connection string
* @return data source specification
*/
virtual QString QgsDataProvider::getDataSourceUri() = 0;
*/
virtual void QgsDataProvider::select(QgsRect *mbr, bool useIntersect=false)=0;
/**
* Set the data source specification. This may be a path or database
* connection string
* @param data source specification
*/
virtual void QgsDataProvider::setDataSourceUri(QString uri) = 0;
/**
* Get the data source specification. This may be a path or database
* connection string
* @return data source specification
*/
virtual QString QgsDataProvider::getDataSourceUri() = 0;
/**
* Get the extent of the layer
* @return QgsRect containing the extent of the layer
*/
virtual QgsRect * QgsDataProvider::extent() = 0;
/**
* Identify features within the search radius specified by rect
* @param rect Bounding rectangle of search radius
* @return std::vector containing QgsFeature objects that intersect rect
*/
virtual std::vector<QgsFeature>& QgsDataProvider::identify(QgsRect *rect)=0;
/**
* Identify features within the search radius specified by rect
* @param rect Bounding rectangle of search radius
* @return std::vector containing QgsFeature objects that intersect rect
*/
virtual std::vector<QgsFeature>& QgsDataProvider::identify(QgsRect *rect)=0;
/**
* Return the endian of this layer.
* @return 0 for NDR (little endian), 1 for XDR (big endian
*/
virtual int QgsDataProvider::endian()=0;
virtual int QgsDataProvider::endian()=0;
/**
* Return a list of field names for this layer