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The geometry cache was only used for few geometry editing operations anyway. In earlier versions of QGIS the geometry cache was also used by old snapping classes which have been replaced by QgsPointLocator that also keeps a spatial index of geometries and it is not rebuilt on every re-render. Reasons for removal: - geometry cache was repopulated on every redraw of layers in editing mode, slowing down rendering - data structure for the cache was a simple map with features accessed by their ID (no spatial index) - the cache was only getting refreshed for the current view of the main map canvas (not a generic cache) - not used for snapping anymore where caching was important to avoid roundtrips to data provider
2022 lines
64 KiB
Plaintext
2022 lines
64 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgsvectorlayer.h *
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* *
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* Do not edit manually ! Edit header and run scripts/sipify.pl again *
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************************************************************************/
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typedef QList<int> QgsAttributeList;
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typedef QSet<int> QgsAttributeIds;
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class QgsVectorLayer : QgsMapLayer, QgsExpressionContextGenerator, QgsFeatureSink
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{
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%Docstring
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Represents a vector layer which manages a vector based data sets.
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The QgsVectorLayer is instantiated by specifying the name of a data provider,
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such as postgres or wfs, and url defining the specific data set to connect to.
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The vector layer constructor in turn instantiates a QgsVectorDataProvider subclass
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corresponding to the provider type, and passes it the url. The data provider
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connects to the data source.
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The QgsVectorLayer provides a common interface to the different data types. It also
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manages editing transactions.
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Sample usage of the QgsVectorLayer class:
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\code
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QString uri = "point?crs=epsg:4326&field=id:integer";
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QgsVectorLayer *scratchLayer = new QgsVectorLayer(uri, "Scratch point layer", "memory");
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\endcode
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The main data providers supported by QGIS are listed below.
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\section providers Vector data providers
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\subsection memory Memory data providerType (memory)
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The memory data provider is used to construct in memory data, for example scratch
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data or data generated from spatial operations such as contouring. There is no
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inherent persistent storage of the data. The data source uri is constructed. The
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url specifies the geometry type ("point", "linestring", "polygon",
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"multipoint","multilinestring","multipolygon"), optionally followed by url parameters
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as follows:
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- crs=definition
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Defines the coordinate reference system to use for the layer.
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definition is any string accepted by QgsCoordinateReferenceSystem.createFromString()
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- index=yes
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Specifies that the layer will be constructed with a spatial index
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- field=name:type(length,precision)
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Defines an attribute of the layer. Multiple field parameters can be added
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to the data provider definition. type is one of "integer", "double", "string".
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An example url is "Point?crs=epsg:4326&field=id:integer&field=name:string(20)&index=yes"
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\subsection ogr OGR data provider (ogr)
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Accesses data using the OGR drivers (http://www.gdal.org/ogr/ogr_formats.html). The url
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is the OGR connection string. A wide variety of data formats can be accessed using this
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driver, including file based formats used by many GIS systems, database formats, and
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web services. Some of these formats are also supported by custom data providers listed
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below.
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\subsection spatialite Spatialite data provider (spatialite)
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Access data in a spatialite database. The url defines the connection parameters, table,
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geometry column, and other attributes. The url can be constructed using the
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QgsDataSourceUri class.
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\subsection postgres Postgresql data provider (postgres)
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Connects to a postgresql database. The url defines the connection parameters, table,
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geometry column, and other attributes. The url can be constructed using the
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QgsDataSourceUri class.
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\subsection mssql Microsoft SQL server data provider (mssql)
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Connects to a Microsoft SQL server database. The url defines the connection parameters, table,
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geometry column, and other attributes. The url can be constructed using the
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QgsDataSourceUri class.
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\subsection wfs WFS (web feature service) data provider (wfs)
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Used to access data provided by a web feature service.
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The url can be a HTTP url to a WFS server (legacy, e.g. http://foobar/wfs?TYPENAME=xxx&SRSNAME=yyy[&FILTER=zzz]), or,
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starting with QGIS 2.16, a URI constructed using the QgsDataSourceUri class with the following parameters :
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- url=string (mandatory): HTTP url to a WFS server endpoint. e.g http://foobar/wfs
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- typename=string (mandatory): WFS typename
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- srsname=string (recommended): SRS like 'EPSG:XXXX'
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- username=string
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- password=string
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- authcfg=string
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- version=auto/1.0.0/1.1.0/2.0.0
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-sql=string: full SELECT SQL statement with optional WHERE, ORDER BY and possibly with JOIN if supported on server
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- filter=string: QGIS expression or OGC/FES filter
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- restrictToRequestBBOX=1: to download only features in the view extent (or more generally
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in the bounding box of the feature iterator)
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- maxNumFeatures=number
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- IgnoreAxisOrientation=1: to ignore EPSG axis order for WFS 1.1 or 2.0
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- InvertAxisOrientation=1: to invert axis order
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- hideDownloadProgressDialog=1: to hide the download progress dialog
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The ‘FILTER’ query string parameter can be used to filter
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the WFS feature type. The ‘FILTER’ key value can either be a QGIS expression
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or an OGC XML filter. If the value is set to a QGIS expression the driver will
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turn it into OGC XML filter before passing it to the WFS server. Beware the
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QGIS expression filter only supports” =, !=, <, >, <=, >=, AND, OR, NOT, LIKE, IS NULL”
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attribute operators, “BBOX, Disjoint, Intersects, Touches, Crosses, Contains, Overlaps, Within”
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spatial binary operators and the QGIS local “geomFromWKT, geomFromGML”
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geometry constructor functions.
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Also note:
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- You can use various functions available in the QGIS Expression list,
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however the function must exist server side and have the same name and arguments to work.
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- Use the special $geometry parameter to provide the layer geometry column as input
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into the spatial binary operators e.g intersects($geometry, geomFromWKT('POINT (5 6)'))
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\subsection delimitedtext Delimited text file data provider (delimitedtext)
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Accesses data in a delimited text file, for example CSV files generated by
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spreadsheets. The contents of the file are split into columns based on specified
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delimiter characters. Each record may be represented spatially either by an
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X and Y coordinate column, or by a WKT (well known text) formatted columns.
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The url defines the filename, the formatting options (how the
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text in the file is divided into data fields, and which fields contain the
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X,Y coordinates or WKT text definition. The options are specified as url query
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items.
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At its simplest the url can just be the filename, in which case it will be loaded
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as a CSV formatted file.
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The url may include the following items:
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- encoding=UTF-8
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Defines the character encoding in the file. The default is UTF-8. To use
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the default encoding for the operating system use "System".
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- type=(csv|regexp|whitespace|plain)
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Defines the algorithm used to split records into columns. Records are
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defined by new lines, except for csv format files for which quoted fields
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may span multiple records. The default type is csv.
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- "csv" splits the file based on three sets of characters:
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delimiter characters, quote characters,
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and escape characters. Delimiter characters mark the end
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of a field. Quote characters enclose a field which can contain
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delimiter characters, and newlines. Escape characters cause the
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following character to be treated literally (including delimiter,
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quote, and newline characters). Escape and quote characters must
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be different from delimiter characters. Escape characters that are
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also quote characters are treated specially - they can only
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escape themselves within quotes. Elsewhere they are treated as
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quote characters. The defaults for delimiter, quote, and escape
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are ',', '"', '"'.
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- "regexp" splits each record using a regular expression (see QRegExp
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documentation for details).
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- "whitespace" splits each record based on whitespace (on or more whitespace
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characters. Leading whitespace in the record is ignored.
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- "plain" is provided for backwards compatibility. It is equivalent to
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CSV except that the default quote characters are single and double quotes,
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and there is no escape characters.
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- delimiter=characters
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Defines the delimiter characters used for csv and plain type files, or the
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regular expression for regexp type files. It is a literal string of characters
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except that "\t" may be used to represent a tab character.
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- quote=characters
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Defines the characters that are used as quote characters for csv and plain type
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files.
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- escape=characters
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Defines the characters used to escape delimiter, quote, and newline characters.
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- skipLines=n
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Defines the number of lines to ignore at the beginning of the file (default 0)
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- useHeader=(yes|no)
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Defines whether the first record in the file (after skipped lines) contains
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column names (default yes)
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- trimFields=(yes|no)
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If yes then leading and trailing whitespace will be removed from fields
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- skipEmptyFields=(yes|no)
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If yes then empty fields will be discarded (equivalent to concatenating consecutive
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delimiters)
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- maxFields=#
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Specifies the maximum number of fields to load for each record. Additional
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fields will be discarded. Default is 0 - load all fields.
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- decimalPoint=c
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Defines a character that is used as a decimal point in the numeric columns
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The default is '.'.
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- xField=column yField=column
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Defines the name of the columns holding the x and y coordinates for XY point geometries.
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If the useHeader is no (ie there are no column names), then this is the column
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number (with the first column as 1).
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- xyDms=(yes|no)
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If yes then the X and Y coordinates are interpreted as
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degrees/minutes/seconds format (fairly permissively),
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or degree/minutes format.
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- wktField=column
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Defines the name of the columns holding the WKT geometry definition for WKT geometries.
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If the useHeader is no (ie there are no column names), then this is the column
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number (with the first column as 1).
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- geomType=(point|line|polygon|none)
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Defines the geometry type for WKT type geometries. QGIS will only display one
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type of geometry for the layer - any others will be ignored when the file is
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loaded. By default the provider uses the type of the first geometry in the file.
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Use geomType to override this type.
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geomType can also be set to none, in which case the layer is loaded without
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geometries.
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- subset=expression
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Defines an expression that will identify a subset of records to display
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- crs=crsstring
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Defines the coordinate reference system used for the layer. This can be
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any string accepted by QgsCoordinateReferenceSystem.createFromString()
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-subsetIndex=(yes|no)
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Determines whether the provider generates an index to improve the efficiency
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of subsets. The default is yes
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-spatialIndex=(yes|no)
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Determines whether the provider generates a spatial index. The default is no.
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-watchFile=(yes|no)
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Defines whether the file will be monitored for changes. The default is
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to monitor for changes.
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- quiet
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Errors encountered loading the file will not be reported in a user dialog if
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quiet is included (They will still be shown in the output log).
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\subsection gpx GPX data provider (gpx)
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Provider reads tracks, routes, and waypoints from a GPX file. The url
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defines the name of the file, and the type of data to retrieve from it
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("track", "route", or "waypoint").
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An example url is "/home/user/data/holiday.gpx?type=route"
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\subsection grass Grass data provider (grass)
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Provider to display vector data in a GRASS GIS layer.
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TODO QGIS3: Remove virtual from non-inherited methods (like isModified)
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.. seealso:: QgsVectorLayerUtils()
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%End
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%TypeHeaderCode
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#include "qgsvectorlayer.h"
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%End
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public:
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enum EditResult
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{
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Success,
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EmptyGeometry,
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EditFailed,
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FetchFeatureFailed,
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InvalidLayer,
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};
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enum SelectBehavior
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{
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SetSelection,
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AddToSelection,
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IntersectSelection,
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RemoveFromSelection,
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};
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QgsVectorLayer( const QString &path = QString(), const QString &baseName = QString(),
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const QString &providerLib = "ogr", bool loadDefaultStyleFlag = true );
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%Docstring
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Constructor - creates a vector layer
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The QgsVectorLayer is constructed by instantiating a data provider. The provider
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interprets the supplied path (url) of the data source to connect to and access the
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data.
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\param path The path or url of the parameter. Typically this encodes
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parameters used by the data provider as url query items.
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\param baseName The name used to represent the layer in the legend
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\param providerLib The name of the data provider, e.g., "memory", "postgres"
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\param loadDefaultStyleFlag whether to load the default style
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%End
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virtual ~QgsVectorLayer();
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QString storageType() const;
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%Docstring
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Returns the permanent storage type for this layer as a friendly name.
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:rtype: str
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%End
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QString capabilitiesString() const;
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%Docstring
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Capabilities for this layer in a friendly format.
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:rtype: str
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%End
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QString dataComment() const;
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%Docstring
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Returns a comment for the data in the layer
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:rtype: str
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%End
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QString displayField() const;
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%Docstring
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This is a shorthand for accessing the displayExpression if it is a simple field.
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If the displayExpression is more complex than a simple field, a null string will
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be returned.
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.. seealso:: displayExpression
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:rtype: str
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%End
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void setDisplayExpression( const QString &displayExpression );
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%Docstring
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Set the preview expression, used to create a human readable preview string.
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Used e.g. in the attribute table feature list. Uses QgsExpression.
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\param displayExpression The expression which will be used to preview features
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for this layer
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%End
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QString displayExpression() const;
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%Docstring
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Get the preview expression, used to create a human readable preview string.
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Uses QgsExpression
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:return: The expression which will be used to preview features for this layer
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:rtype: str
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%End
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virtual QgsVectorDataProvider *dataProvider();
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void setProviderEncoding( const QString &encoding );
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%Docstring
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Sets the textencoding of the data provider
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%End
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void setCoordinateSystem();
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%Docstring
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Setup the coordinate system transformation for the layer
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%End
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bool addJoin( const QgsVectorLayerJoinInfo &joinInfo );
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%Docstring
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Joins another vector layer to this layer
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\param joinInfo join object containing join layer id, target and source field
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.. note::
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since 2.6 returns bool indicating whether the join can be added *
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:rtype: bool
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%End
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bool removeJoin( const QString &joinLayerId );
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%Docstring
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Removes a vector layer join
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:return: true if join was found and successfully removed *
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:rtype: bool
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%End
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QgsVectorLayerJoinBuffer *joinBuffer();
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%Docstring
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Accessor to the join buffer object
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.. versionadded:: 2.14.7
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:rtype: QgsVectorLayerJoinBuffer
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%End
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const QList<QgsVectorLayerJoinInfo> vectorJoins() const;
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%Docstring
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:rtype: list of QgsVectorLayerJoinInfo
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%End
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virtual bool setDependencies( const QSet<QgsMapLayerDependency> &layers );
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%Docstring
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Sets the list of dependencies.
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.. seealso:: dependencies()
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\param layers set of QgsMapLayerDependency. Only user-defined dependencies will be added
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:return: false if a dependency cycle has been detected
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.. versionadded:: 3.0
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:rtype: bool
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%End
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||
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virtual QSet<QgsMapLayerDependency> dependencies() const;
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%Docstring
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||
.. seealso:: setDataDependencies)
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||
as well as dependencies given by the provider
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||
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||
:return: a set of QgsMapLayerDependency
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||
.. versionadded:: 3.0
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||
:rtype: set of QgsMapLayerDependency
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||
%End
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||
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int addExpressionField( const QString &exp, const QgsField &fld );
|
||
%Docstring
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||
Add a new field which is calculated by the expression specified
|
||
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||
\param exp The expression which calculates the field
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||
\param fld The field to calculate
|
||
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||
:return: The index of the new field
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||
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||
.. versionadded:: 2.9
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||
:rtype: int
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||
%End
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||
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||
void removeExpressionField( int index );
|
||
%Docstring
|
||
Remove an expression field
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||
|
||
\param index The index of the field
|
||
|
||
.. versionadded:: 2.6
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||
%End
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||
|
||
QString expressionField( int index ) const;
|
||
%Docstring
|
||
Returns the expression used for a given expression field
|
||
|
||
\param index An index of an epxression based (virtual) field
|
||
|
||
:return: The expression for the field at index
|
||
|
||
.. versionadded:: 2.9
|
||
:rtype: str
|
||
%End
|
||
|
||
void updateExpressionField( int index, const QString &exp );
|
||
%Docstring
|
||
Changes the expression used to define an expression based (virtual) field
|
||
|
||
\param index The index of the expression to change
|
||
|
||
\param exp The new expression to set
|
||
|
||
.. versionadded:: 2.9
|
||
%End
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||
|
||
QgsActionManager *actions();
|
||
%Docstring
|
||
Get all layer actions defined on this layer.
|
||
|
||
The pointer which is returned directly points to the actions object
|
||
which is used by the layer, so any changes are immediately applied.
|
||
:rtype: QgsActionManager
|
||
%End
|
||
|
||
int selectedFeatureCount() const;
|
||
%Docstring
|
||
The number of features that are selected in this layer
|
||
|
||
:return: See description
|
||
:rtype: int
|
||
%End
|
||
|
||
void selectByRect( QgsRectangle &rect, SelectBehavior behavior = SetSelection );
|
||
%Docstring
|
||
Select features found within the search rectangle (in layer's coordinates)
|
||
\param rect search rectangle
|
||
\param behavior selection type, allows adding to current selection, removing
|
||
from selection, etc.
|
||
.. seealso:: invertSelectionInRectangle(QgsRectangle & rect)
|
||
.. seealso:: selectByExpression()
|
||
.. seealso:: selectByIds()
|
||
%End
|
||
|
||
void selectByExpression( const QString &expression, SelectBehavior behavior = SetSelection );
|
||
%Docstring
|
||
Select matching features using an expression.
|
||
\param expression expression to evaluate to select features
|
||
\param behavior selection type, allows adding to current selection, removing
|
||
from selection, etc.
|
||
.. versionadded:: 2.16
|
||
.. seealso:: selectByRect()
|
||
.. seealso:: selectByIds()
|
||
%End
|
||
|
||
void selectByIds( const QgsFeatureIds &ids, SelectBehavior behavior = SetSelection );
|
||
%Docstring
|
||
Select matching features using a list of feature IDs. Will emit the
|
||
selectionChanged() signal with the clearAndSelect flag set.
|
||
\param ids feature IDs to select
|
||
\param behavior selection type, allows adding to current selection, removing
|
||
from selection, etc.
|
||
.. versionadded:: 2.16
|
||
.. seealso:: selectByRect()
|
||
.. seealso:: selectByExpression()
|
||
%End
|
||
|
||
void modifySelection( const QgsFeatureIds &selectIds, const QgsFeatureIds &deselectIds );
|
||
%Docstring
|
||
Modifies the current selection on this layer
|
||
|
||
\param selectIds Select these ids
|
||
\param deselectIds Deselect these ids
|
||
|
||
.. seealso:: select(QgsFeatureIds)
|
||
.. seealso:: select(QgsFeatureId)
|
||
.. seealso:: deselect(QgsFeatureIds)
|
||
.. seealso:: deselect(QgsFeatureId)
|
||
.. seealso:: selectByExpression()
|
||
%End
|
||
|
||
void invertSelection();
|
||
%Docstring
|
||
Select not selected features and deselect selected ones
|
||
%End
|
||
|
||
void selectAll();
|
||
%Docstring
|
||
Select all the features
|
||
%End
|
||
|
||
QgsFeatureIds allFeatureIds() const;
|
||
%Docstring
|
||
Get all feature Ids
|
||
:rtype: QgsFeatureIds
|
||
%End
|
||
|
||
void invertSelectionInRectangle( QgsRectangle &rect );
|
||
%Docstring
|
||
Invert selection of features found within the search rectangle (in layer's coordinates)
|
||
|
||
\param rect The rectangle in which the selection of features will be inverted
|
||
|
||
.. seealso:: invertSelection()
|
||
%End
|
||
|
||
QgsFeatureList selectedFeatures() const;
|
||
%Docstring
|
||
Get a copy of the user-selected features
|
||
|
||
:return: A list of QgsFeature
|
||
|
||
.. seealso:: selectedFeatureIds()
|
||
.. seealso:: getSelectedFeatures() which is more memory friendly when handling large selections
|
||
:rtype: QgsFeatureList
|
||
%End
|
||
|
||
QgsFeatureIterator getSelectedFeatures( QgsFeatureRequest request = QgsFeatureRequest() ) const;
|
||
%Docstring
|
||
Get an iterator of the selected features
|
||
|
||
\param request You may specify a request, e.g. to limit the set of requested attributes.
|
||
Any filter on the request will be discarded.
|
||
|
||
:return: Iterator over the selected features
|
||
|
||
.. seealso:: selectedFeatureIds()
|
||
.. seealso:: selectedFeatures()
|
||
:rtype: QgsFeatureIterator
|
||
%End
|
||
|
||
const QgsFeatureIds &selectedFeatureIds() const;
|
||
%Docstring
|
||
Return reference to identifiers of selected features
|
||
|
||
:return: A list of QgsFeatureId
|
||
.. seealso:: selectedFeatures()
|
||
:rtype: QgsFeatureIds
|
||
%End
|
||
|
||
QgsRectangle boundingBoxOfSelected() const;
|
||
%Docstring
|
||
Returns the bounding box of the selected features. If there is no selection, QgsRectangle(0,0,0,0) is returned
|
||
:rtype: QgsRectangle
|
||
%End
|
||
|
||
bool labelsEnabled() const;
|
||
%Docstring
|
||
Returns whether the layer contains labels which are enabled and should be drawn.
|
||
:return: true if layer contains enabled labels
|
||
.. versionadded:: 2.9
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool diagramsEnabled() const;
|
||
%Docstring
|
||
Returns whether the layer contains diagrams which are enabled and should be drawn.
|
||
:return: true if layer contains enabled diagrams
|
||
.. versionadded:: 2.9
|
||
:rtype: bool
|
||
%End
|
||
|
||
void setDiagramRenderer( QgsDiagramRenderer *r /Transfer/ );
|
||
%Docstring
|
||
Sets diagram rendering object (takes ownership)
|
||
%End
|
||
const QgsDiagramRenderer *diagramRenderer() const;
|
||
%Docstring
|
||
:rtype: QgsDiagramRenderer
|
||
%End
|
||
|
||
void setDiagramLayerSettings( const QgsDiagramLayerSettings &s );
|
||
const QgsDiagramLayerSettings *diagramLayerSettings() const;
|
||
%Docstring
|
||
:rtype: QgsDiagramLayerSettings
|
||
%End
|
||
|
||
QgsFeatureRenderer *renderer();
|
||
%Docstring
|
||
Return renderer.
|
||
:rtype: QgsFeatureRenderer
|
||
%End
|
||
|
||
|
||
void setRenderer( QgsFeatureRenderer *r /Transfer/ );
|
||
%Docstring
|
||
Set renderer which will be invoked to represent this layer.
|
||
Ownership is transferred.
|
||
%End
|
||
|
||
QgsWkbTypes::GeometryType geometryType() const;
|
||
%Docstring
|
||
Returns point, line or polygon
|
||
:rtype: QgsWkbTypes.GeometryType
|
||
%End
|
||
|
||
bool hasGeometryType() const;
|
||
%Docstring
|
||
Returns true if this is a geometry layer and false in case of NoGeometry (table only) or UnknownGeometry
|
||
:rtype: bool
|
||
%End
|
||
|
||
QgsWkbTypes::Type wkbType() const;
|
||
%Docstring
|
||
Returns the WKBType or WKBUnknown in case of error
|
||
:rtype: QgsWkbTypes.Type
|
||
%End
|
||
|
||
QString providerType() const;
|
||
%Docstring
|
||
Return the provider type for this layer
|
||
:rtype: str
|
||
%End
|
||
|
||
virtual bool readXml( const QDomNode &layer_node );
|
||
%Docstring
|
||
Reads vector layer specific state from project file Dom node.
|
||
.. note::
|
||
|
||
Called by QgsMapLayer.readXml().
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool writeXml( QDomNode &layer_node, QDomDocument &doc ) const;
|
||
%Docstring
|
||
Write vector layer specific state to project file Dom node.
|
||
.. note::
|
||
|
||
Called by QgsMapLayer.writeXml().
|
||
:rtype: bool
|
||
%End
|
||
|
||
void resolveReferences( QgsProject *project );
|
||
%Docstring
|
||
Resolve references to other layers (kept as layer IDs after reading XML) into layer objects.
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
virtual void saveStyleToDatabase( const QString &name, const QString &description,
|
||
bool useAsDefault, const QString &uiFileContent,
|
||
QString &msgError /Out/ );
|
||
%Docstring
|
||
Save named and sld style of the layer to the style table in the db.
|
||
\param name
|
||
\param description
|
||
\param useAsDefault
|
||
\param uiFileContent
|
||
\param msgError
|
||
%End
|
||
|
||
virtual int listStylesInDatabase( QStringList &ids /Out/, QStringList &names /Out/,
|
||
QStringList &descriptions /Out/, QString &msgError /Out/ );
|
||
%Docstring
|
||
Lists all the style in db split into related to the layer and not related to
|
||
\param ids the list in which will be stored the style db ids
|
||
\param names the list in which will be stored the style names
|
||
\param descriptions the list in which will be stored the style descriptions
|
||
\param msgError
|
||
:return: the number of styles related to current layer
|
||
:rtype: int
|
||
%End
|
||
|
||
virtual QString getStyleFromDatabase( const QString &styleId, QString &msgError /Out/ );
|
||
%Docstring
|
||
Will return the named style corresponding to style id provided
|
||
:rtype: str
|
||
%End
|
||
|
||
virtual bool deleteStyleFromDatabase( const QString &styleId, QString &msgError /Out/ );
|
||
%Docstring
|
||
Delete a style from the database
|
||
.. versionadded:: 3.0
|
||
\param styleId the provider's layer_styles table id of the style to delete
|
||
\param msgError reference to string that will be updated with any error messages
|
||
:return: true in case of success
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual QString loadNamedStyle( const QString &theURI, bool &resultFlag /Out/, bool loadFromLocalDb );
|
||
%Docstring
|
||
Load a named style from file/local db/datasource db
|
||
\param theURI the URI of the style or the URI of the layer
|
||
\param resultFlag will be set to true if a named style is correctly loaded
|
||
\param loadFromLocalDb if true forces to load from local db instead of datasource one
|
||
:rtype: str
|
||
%End
|
||
|
||
virtual QString loadNamedStyle( const QString &theURI, bool &resultFlag /Out/ );
|
||
%Docstring
|
||
Calls loadNamedStyle( theURI, resultFlag, false );
|
||
Retained for backward compatibility
|
||
:rtype: str
|
||
%End
|
||
|
||
virtual bool readSymbology( const QDomNode &layerNode, QString &errorMessage );
|
||
|
||
%Docstring
|
||
Read the symbology for the current layer from the Dom node supplied.
|
||
\param layerNode node that will contain the symbology definition for this layer.
|
||
\param errorMessage reference to string that will be updated with any error messages
|
||
:return: true in case of success.
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool readStyle( const QDomNode &node, QString &errorMessage );
|
||
|
||
%Docstring
|
||
Read the style for the current layer from the Dom node supplied.
|
||
\param node node that will contain the style definition for this layer.
|
||
\param errorMessage reference to string that will be updated with any error messages
|
||
:return: true in case of success.
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool writeSymbology( QDomNode &node, QDomDocument &doc, QString &errorMessage ) const;
|
||
|
||
%Docstring
|
||
Write the symbology for the layer into the docment provided.
|
||
\param node the node that will have the style element added to it.
|
||
\param doc the document that will have the QDomNode added.
|
||
\param errorMessage reference to string that will be updated with any error messages
|
||
:return: true in case of success.
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool writeStyle( QDomNode &node, QDomDocument &doc, QString &errorMessage ) const;
|
||
|
||
%Docstring
|
||
Write just the style information for the layer into the document
|
||
\param node the node that will have the style element added to it.
|
||
\param doc the document that will have the QDomNode added.
|
||
\param errorMessage reference to string that will be updated with any error messages
|
||
:return: true in case of success.
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool writeSld( QDomNode &node, QDomDocument &doc, QString &errorMessage, const QgsStringMap &props = QgsStringMap() ) const;
|
||
%Docstring
|
||
Writes the symbology of the layer into the document provided in SLD 1.1 format
|
||
\param node the node that will have the style element added to it.
|
||
\param doc the document that will have the QDomNode added.
|
||
\param errorMessage reference to string that will be updated with any error messages
|
||
\param props a open ended set of properties that can drive/inform the SLD encoding
|
||
:return: true in case of success
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool readSld( const QDomNode &node, QString &errorMessage );
|
||
|
||
|
||
long featureCount( const QString &legendKey ) const;
|
||
%Docstring
|
||
Number of features rendered with specified legend key. Features must be first
|
||
calculated by countSymbolFeatures()
|
||
:return: number of features rendered by symbol or -1 if failed or counts are not available
|
||
:rtype: long
|
||
%End
|
||
|
||
void setDataSource( const QString &dataSource, const QString &baseName, const QString &provider, bool loadDefaultStyleFlag = false );
|
||
%Docstring
|
||
Update the data source of the layer. The layer's renderer and legend will be preserved only
|
||
if the geometry type of the new data source matches the current geometry type of the layer.
|
||
\param dataSource new layer data source
|
||
\param baseName base name of the layer
|
||
\param provider provider string
|
||
\param loadDefaultStyleFlag set to true to reset the layer's style to the default for the
|
||
data source
|
||
.. versionadded:: 2.10
|
||
%End
|
||
|
||
bool countSymbolFeatures( bool showProgress = true );
|
||
%Docstring
|
||
Count features for symbols. Feature counts may be get by featureCount().
|
||
\param showProgress show progress dialog
|
||
:return: true if calculated, false if failed or was canceled by user
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool setSubsetString( const QString &subset );
|
||
%Docstring
|
||
Set the string (typically sql) used to define a subset of the layer
|
||
\param subset The subset string. This may be the where clause of a sql statement
|
||
or other definition string specific to the underlying dataprovider
|
||
and data store.
|
||
:return: true, when setting the subset string was successful, false otherwise
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual QString subsetString() const;
|
||
%Docstring
|
||
Get the string (typically sql) used to define a subset of the layer
|
||
:return: The subset string or QString.null if not implemented by the provider
|
||
:rtype: str
|
||
%End
|
||
|
||
QgsFeatureIterator getFeatures( const QgsFeatureRequest &request = QgsFeatureRequest() ) const;
|
||
%Docstring
|
||
Query the layer for features specified in request.
|
||
\param request feature request describing parameters of features to return
|
||
:return: iterator for matching features from provider
|
||
:rtype: QgsFeatureIterator
|
||
%End
|
||
|
||
QgsFeatureIterator getFeatures( const QString &expression );
|
||
%Docstring
|
||
Query the layer for features matching a given expression.
|
||
:rtype: QgsFeatureIterator
|
||
%End
|
||
|
||
QgsFeature getFeature( QgsFeatureId fid );
|
||
%Docstring
|
||
Query the layer for the feature with the given id.
|
||
If there is no such feature, the returned feature will be invalid.
|
||
:rtype: QgsFeature
|
||
%End
|
||
|
||
QgsFeatureIterator getFeatures( const QgsFeatureIds &fids );
|
||
%Docstring
|
||
Query the layer for the features with the given ids.
|
||
:rtype: QgsFeatureIterator
|
||
%End
|
||
|
||
QgsFeatureIterator getFeatures( const QgsRectangle &rectangle );
|
||
%Docstring
|
||
Query the layer for the features which intersect the specified rectangle.
|
||
:rtype: QgsFeatureIterator
|
||
%End
|
||
|
||
virtual bool addFeature( QgsFeature &feature );
|
||
|
||
|
||
bool updateFeature( QgsFeature &f );
|
||
%Docstring
|
||
Updates an existing feature. This method needs to query the datasource
|
||
on every call. Consider using changeAttributeValue() or
|
||
changeGeometry() instead.
|
||
\param f Feature to update
|
||
:return: True in case of success and False in case of error
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool insertVertex( double x, double y, QgsFeatureId atFeatureId, int beforeVertex );
|
||
%Docstring
|
||
Insert a new vertex before the given vertex number,
|
||
in the given ring, item (first number is index 0), and feature
|
||
Not meaningful for Point geometries
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool insertVertex( const QgsPointV2 &point, QgsFeatureId atFeatureId, int beforeVertex );
|
||
%Docstring
|
||
Insert a new vertex before the given vertex number,
|
||
in the given ring, item (first number is index 0), and feature
|
||
Not meaningful for Point geometries
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool moveVertex( double x, double y, QgsFeatureId atFeatureId, int atVertex );
|
||
%Docstring
|
||
Moves the vertex at the given position number,
|
||
ring and item (first number is index 0), and feature
|
||
to the given coordinates
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool moveVertex( const QgsPointV2 &p, QgsFeatureId atFeatureId, int atVertex ) /PyName=moveVertexV2/;
|
||
%Docstring
|
||
Moves the vertex at the given position number,
|
||
ring and item (first number is index 0), and feature
|
||
to the given coordinates
|
||
.. note::
|
||
|
||
available in Python as moveVertexV2
|
||
:rtype: bool
|
||
%End
|
||
|
||
EditResult deleteVertex( QgsFeatureId featureId, int vertex );
|
||
%Docstring
|
||
Deletes a vertex from a feature.
|
||
\param featureId ID of feature to remove vertex from
|
||
\param vertex index of vertex to delete
|
||
.. versionadded:: 2.14
|
||
:rtype: EditResult
|
||
%End
|
||
|
||
bool deleteSelectedFeatures( int *deletedCount = 0 );
|
||
%Docstring
|
||
Deletes the selected features
|
||
:return: true in case of success and false otherwise
|
||
:rtype: bool
|
||
%End
|
||
|
||
int addRing( const QList<QgsPoint> &ring, QgsFeatureId *featureId = 0 );
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int addRing( QgsCurve *ring /Transfer/, QgsFeatureId *featureId = 0 ) /PyName=addCurvedRing/;
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int addPart( const QList<QgsPoint> &ring );
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int addPart( const QgsPointSequence &ring ) /PyName=addPartV2/;
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int addPart( QgsCurve *ring /Transfer/ ) /PyName=addCurvedPart/;
|
||
%Docstring
|
||
.. note::
|
||
|
||
available in Python as addCurvedPart
|
||
:rtype: int
|
||
%End
|
||
|
||
int translateFeature( QgsFeatureId featureId, double dx, double dy );
|
||
%Docstring
|
||
Translates feature by dx, dy
|
||
\param featureId id of the feature to translate
|
||
\param dx translation of x-coordinate
|
||
\param dy translation of y-coordinate
|
||
:return: 0 in case of success
|
||
:rtype: int
|
||
%End
|
||
|
||
int splitParts( const QList<QgsPoint> &splitLine, bool topologicalEditing = false );
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int splitFeatures( const QList<QgsPoint> &splitLine, bool topologicalEditing = false );
|
||
%Docstring
|
||
:rtype: int
|
||
%End
|
||
|
||
int addTopologicalPoints( const QgsGeometry &geom );
|
||
%Docstring
|
||
Adds topological points for every vertex of the geometry.
|
||
\param geom the geometry where each vertex is added to segments of other features
|
||
.. note::
|
||
|
||
geom is not going to be modified by the function
|
||
:return: 0 in case of success
|
||
:rtype: int
|
||
%End
|
||
|
||
int addTopologicalPoints( const QgsPoint &p );
|
||
%Docstring
|
||
Adds a vertex to segments which intersect point p but don't
|
||
already have a vertex there. If a feature already has a vertex at position p,
|
||
no additional vertex is inserted. This method is useful for topological
|
||
editing.
|
||
\param p position of the vertex
|
||
:return: 0 in case of success
|
||
:rtype: int
|
||
%End
|
||
|
||
|
||
|
||
virtual bool isEditable() const;
|
||
%Docstring
|
||
Returns true if the provider is in editing mode
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool isSpatial() const;
|
||
|
||
virtual bool isModified() const;
|
||
%Docstring
|
||
Returns true if the provider has been modified since the last commit
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual void reload();
|
||
%Docstring
|
||
Synchronises with changes in the datasource
|
||
%End
|
||
|
||
virtual QgsMapLayerRenderer *createMapRenderer( QgsRenderContext &rendererContext ) /Factory/;
|
||
%Docstring
|
||
Return new instance of QgsMapLayerRenderer that will be used for rendering of given context
|
||
.. versionadded:: 2.4
|
||
:rtype: QgsMapLayerRenderer
|
||
%End
|
||
|
||
virtual QgsRectangle extent() const;
|
||
|
||
%Docstring
|
||
Return the extent of the layer
|
||
:rtype: QgsRectangle
|
||
%End
|
||
|
||
QgsFields fields() const;
|
||
%Docstring
|
||
Returns the list of fields of this layer.
|
||
This also includes fields which have not yet been saved to the provider.
|
||
|
||
:return: A list of fields
|
||
:rtype: QgsFields
|
||
%End
|
||
|
||
QgsFields pendingFields() const;
|
||
%Docstring
|
||
Returns the list of fields of this layer.
|
||
This also includes fields which have not yet been saved to the provider.
|
||
Alias for fields()
|
||
|
||
:return: A list of fields
|
||
:rtype: QgsFields
|
||
%End
|
||
|
||
QgsAttributeList pendingAllAttributesList() const;
|
||
%Docstring
|
||
Returns list of attribute indexes. i.e. a list from 0 ... fieldCount()
|
||
Alias for attributeList()
|
||
:rtype: QgsAttributeList
|
||
%End
|
||
|
||
QgsAttributeList attributeList() const;
|
||
%Docstring
|
||
Returns list of attribute indexes. i.e. a list from 0 ... fieldCount()
|
||
Alias for attributeList()
|
||
:rtype: QgsAttributeList
|
||
%End
|
||
|
||
QgsAttributeList pendingPkAttributesList() const;
|
||
%Docstring
|
||
Returns list of attributes making up the primary key
|
||
Alias for pkAttributeList()
|
||
:rtype: QgsAttributeList
|
||
%End
|
||
|
||
QgsAttributeList pkAttributeList() const;
|
||
%Docstring
|
||
Returns list of attributes making up the primary key
|
||
:rtype: QgsAttributeList
|
||
%End
|
||
|
||
long pendingFeatureCount() const;
|
||
%Docstring
|
||
Returns feature count including changes which have not yet been committed
|
||
Alias for featureCount()
|
||
:rtype: long
|
||
%End
|
||
|
||
long featureCount() const;
|
||
%Docstring
|
||
Returns feature count including changes which have not yet been committed
|
||
If you need only the count of committed features call this method on this layer's provider.
|
||
:rtype: long
|
||
%End
|
||
|
||
bool setReadOnly( bool readonly = true );
|
||
%Docstring
|
||
Make layer read-only (editing disabled) or not
|
||
:return: false if the layer is in editing yet
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool changeGeometry( QgsFeatureId fid, const QgsGeometry &geom );
|
||
%Docstring
|
||
Change feature's geometry
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool changeAttributeValue( QgsFeatureId fid, int field, const QVariant &newValue, const QVariant &oldValue = QVariant() );
|
||
%Docstring
|
||
Changes an attribute value (but does not commit it)
|
||
|
||
\param fid The feature id of the feature to be changed
|
||
\param field The index of the field to be updated
|
||
\param newValue The value which will be assigned to the field
|
||
\param oldValue The previous value to restore on undo (will otherwise be retrieved)
|
||
|
||
:return: true in case of success
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool addAttribute( const QgsField &field );
|
||
%Docstring
|
||
Add an attribute field (but does not commit it)
|
||
returns true if the field was added
|
||
:rtype: bool
|
||
%End
|
||
|
||
void setFieldAlias( int index, const QString &aliasString );
|
||
%Docstring
|
||
Sets an alias (a display name) for attributes to display in dialogs
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
void removeFieldAlias( int index );
|
||
%Docstring
|
||
Removes an alias (a display name) for attributes to display in dialogs
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
bool renameAttribute( int index, const QString &newName );
|
||
%Docstring
|
||
Renames an attribute field (but does not commit it).
|
||
\param index attribute index
|
||
\param newName new name of field
|
||
.. versionadded:: 2.16
|
||
:rtype: bool
|
||
%End
|
||
|
||
QString attributeAlias( int index ) const;
|
||
%Docstring
|
||
Returns the alias of an attribute name or a null string if there is no alias.
|
||
|
||
.. seealso:: {attributeDisplayName( int attributeIndex )} which returns the field name
|
||
if no alias is defined.
|
||
:rtype: str
|
||
%End
|
||
|
||
QString attributeDisplayName( int index ) const;
|
||
%Docstring
|
||
Convenience function that returns the attribute alias if defined or the field name else
|
||
:rtype: str
|
||
%End
|
||
|
||
QgsStringMap attributeAliases() const;
|
||
%Docstring
|
||
Returns a map of field name to attribute alias
|
||
:rtype: QgsStringMap
|
||
%End
|
||
|
||
QSet<QString> excludeAttributesWms() const;
|
||
%Docstring
|
||
A set of attributes that are not advertised in WMS requests with QGIS server.
|
||
:rtype: set of str
|
||
%End
|
||
|
||
void setExcludeAttributesWms( const QSet<QString> &att );
|
||
%Docstring
|
||
A set of attributes that are not advertised in WMS requests with QGIS server.
|
||
%End
|
||
|
||
QSet<QString> excludeAttributesWfs() const;
|
||
%Docstring
|
||
A set of attributes that are not advertised in WFS requests with QGIS server.
|
||
:rtype: set of str
|
||
%End
|
||
|
||
void setExcludeAttributesWfs( const QSet<QString> &att );
|
||
%Docstring
|
||
A set of attributes that are not advertised in WFS requests with QGIS server.
|
||
%End
|
||
|
||
bool deleteAttribute( int attr );
|
||
%Docstring
|
||
Delete an attribute field (but does not commit it)
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool deleteAttributes( QList<int> attrs );
|
||
%Docstring
|
||
Deletes a list of attribute fields (but does not commit it)
|
||
|
||
\param attrs the indices of the attributes to delete
|
||
:return: true if at least one attribute has been deleted
|
||
:rtype: bool
|
||
%End
|
||
|
||
virtual bool addFeatures( QgsFeatureList &features );
|
||
|
||
|
||
bool deleteFeature( QgsFeatureId fid );
|
||
%Docstring
|
||
Delete a feature from the layer (but does not commit it)
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool deleteFeatures( const QgsFeatureIds &fids );
|
||
%Docstring
|
||
Deletes a set of features from the layer (but does not commit it)
|
||
\param fids The feature ids to delete
|
||
|
||
:return: false if the layer is not in edit mode or does not support deleting
|
||
in case of an active transaction depends on the provider implementation
|
||
:rtype: bool
|
||
%End
|
||
|
||
bool commitChanges();
|
||
%Docstring
|
||
Attempts to commit any changes to disk. Returns the result of the attempt.
|
||
If a commit fails, the in-memory changes are left alone.
|
||
|
||
This allows editing to continue if the commit failed on e.g. a
|
||
disallowed value in a Postgres database - the user can re-edit and try
|
||
again.
|
||
|
||
The commits occur in distinct stages,
|
||
(add attributes, add features, change attribute values, change
|
||
geometries, delete features, delete attributes)
|
||
so if a stage fails, it's difficult to roll back cleanly.
|
||
Therefore any error message also includes which stage failed so
|
||
that the user has some chance of repairing the damage cleanly.
|
||
.. seealso:: commitErrors()
|
||
:rtype: bool
|
||
%End
|
||
|
||
QStringList commitErrors() const;
|
||
%Docstring
|
||
Returns a list containing any error messages generated when attempting
|
||
to commit changes to the layer.
|
||
.. seealso:: commitChanges()
|
||
:rtype: list of str
|
||
%End
|
||
|
||
bool rollBack( bool deleteBuffer = true );
|
||
%Docstring
|
||
Stop editing and discard the edits
|
||
\param deleteBuffer whether to delete editing buffer
|
||
:rtype: bool
|
||
%End
|
||
|
||
QString annotationForm() const;
|
||
%Docstring
|
||
Get annotation form
|
||
:rtype: str
|
||
%End
|
||
|
||
void setAnnotationForm( const QString &ui );
|
||
%Docstring
|
||
Set annotation form for layer
|
||
%End
|
||
|
||
QList<QgsRelation> referencingRelations( int idx ) const;
|
||
%Docstring
|
||
Get relations, where the foreign key is on this layer
|
||
|
||
\param idx Only get relations, where idx forms part of the foreign key
|
||
:return: A list of relations
|
||
:rtype: list of QgsRelation
|
||
%End
|
||
|
||
QgsVectorLayerEditBuffer *editBuffer();
|
||
%Docstring
|
||
Buffer with uncommitted editing operations. Only valid after editing has been turned on.
|
||
:rtype: QgsVectorLayerEditBuffer
|
||
%End
|
||
|
||
|
||
void beginEditCommand( const QString &text );
|
||
%Docstring
|
||
Create edit command for undo/redo operations
|
||
\param text text which is to be displayed in undo window
|
||
%End
|
||
|
||
void endEditCommand();
|
||
%Docstring
|
||
Finish edit command and add it to undo/redo stack
|
||
%End
|
||
|
||
void destroyEditCommand();
|
||
%Docstring
|
||
Destroy active command and reverts all changes in it
|
||
%End
|
||
|
||
enum VertexMarkerType
|
||
{
|
||
SemiTransparentCircle,
|
||
Cross,
|
||
NoMarker
|
||
};
|
||
|
||
static void drawVertexMarker( double x, double y, QPainter &p, QgsVectorLayer::VertexMarkerType type, int vertexSize );
|
||
%Docstring
|
||
Draws a vertex symbol at (screen) coordinates x, y. (Useful to assist vertex editing.)
|
||
%End
|
||
|
||
void updateFields();
|
||
%Docstring
|
||
Assembles mUpdatedFields considering provider fields, joined fields and added fields
|
||
%End
|
||
|
||
QVariant defaultValue( int index, const QgsFeature &feature = QgsFeature(),
|
||
QgsExpressionContext *context = 0 ) const;
|
||
%Docstring
|
||
Returns the calculated default value for the specified field index. The default
|
||
value may be taken from a client side default value expression (see setDefaultValueExpression())
|
||
or taken from the underlying data provider.
|
||
\param index field index
|
||
\param feature optional feature to use for default value evaluation. If passed,
|
||
then properties from the feature (such as geometry) can be used when calculating
|
||
the default value.
|
||
\param context optional expression context to evaluate expressions again. If not
|
||
specified, a default context will be created
|
||
:return: calculated default value
|
||
.. versionadded:: 3.0
|
||
.. seealso:: setDefaultValueExpression()
|
||
:rtype: QVariant
|
||
%End
|
||
|
||
void setDefaultValueExpression( int index, const QString &expression );
|
||
%Docstring
|
||
Sets an expression to use when calculating the default value for a field.
|
||
\param index field index
|
||
\param expression expression to evaluate when calculating default values for field. Pass
|
||
an empty expression to clear the default.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: defaultValue()
|
||
.. seealso:: defaultValueExpression()
|
||
%End
|
||
|
||
QString defaultValueExpression( int index ) const;
|
||
%Docstring
|
||
Returns the expression used when calculating the default value for a field.
|
||
\param index field index
|
||
:return: expression evaluated when calculating default values for field, or an
|
||
empty string if no default is set
|
||
.. versionadded:: 3.0
|
||
.. seealso:: defaultValue()
|
||
.. seealso:: setDefaultValueExpression()
|
||
:rtype: str
|
||
%End
|
||
|
||
QgsFieldConstraints::Constraints fieldConstraints( int fieldIndex ) const;
|
||
%Docstring
|
||
Returns any constraints which are present for a specified
|
||
field index. These constraints may be inherited from the layer's data provider
|
||
or may be set manually on the vector layer from within QGIS.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: setFieldConstraint()
|
||
:rtype: QgsFieldConstraints.Constraints
|
||
%End
|
||
|
||
void setFieldConstraint( int index, QgsFieldConstraints::Constraint constraint, QgsFieldConstraints::ConstraintStrength strength = QgsFieldConstraints::ConstraintStrengthHard );
|
||
%Docstring
|
||
Sets a constraint for a specified field index. Any constraints inherited from the layer's
|
||
data provider will be kept intact and cannot be modified. Ie, calling this method only allows for new
|
||
constraints to be added on top of the existing provider constraints.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: fieldConstraints()
|
||
.. seealso:: removeFieldConstraint()
|
||
%End
|
||
|
||
void removeFieldConstraint( int index, QgsFieldConstraints::Constraint constraint );
|
||
%Docstring
|
||
Removes a constraint for a specified field index. Any constraints inherited from the layer's
|
||
data provider will be kept intact and cannot be removed.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: fieldConstraints()
|
||
.. seealso:: setFieldConstraint()
|
||
%End
|
||
|
||
QString constraintExpression( int index ) const;
|
||
%Docstring
|
||
Returns the constraint expression for for a specified field index, if set.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: fieldConstraints()
|
||
.. seealso:: constraintDescription()
|
||
.. seealso:: setConstraintExpression()
|
||
:rtype: str
|
||
%End
|
||
|
||
QString constraintDescription( int index ) const;
|
||
%Docstring
|
||
Returns the descriptive name for the constraint expression for a specified field index.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: constraints()
|
||
.. seealso:: constraintExpression()
|
||
.. seealso:: setConstraintExpression()
|
||
:rtype: str
|
||
%End
|
||
|
||
void setConstraintExpression( int index, const QString &expression, const QString &description = QString() );
|
||
%Docstring
|
||
Set the constraint expression for the specified field index. An optional descriptive name for the constraint
|
||
can also be set. Setting an empty expression will clear any existing expression constraint.
|
||
.. versionadded:: 3.0
|
||
.. seealso:: constraintExpression()
|
||
.. seealso:: constraintDescription()
|
||
.. seealso:: constraints()
|
||
%End
|
||
|
||
void setEditorWidgetSetup( int index, const QgsEditorWidgetSetup &setup );
|
||
%Docstring
|
||
\copydoc editorWidgetSetup
|
||
%End
|
||
|
||
QgsEditorWidgetSetup editorWidgetSetup( int index ) const;
|
||
%Docstring
|
||
The editor widget setup defines which QgsFieldFormatter and editor widget will be used
|
||
for the field at `index`.
|
||
|
||
.. versionadded:: 3.0
|
||
:rtype: QgsEditorWidgetSetup
|
||
%End
|
||
|
||
void uniqueValues( int index, QList<QVariant> &uniqueValues /Out/, int limit = -1 ) const;
|
||
%Docstring
|
||
Calculates a list of unique values contained within an attribute in the layer. Note that
|
||
in some circumstances when unsaved changes are present for the layer then the returned list
|
||
may contain outdated values (for instance when the attribute value in a saved feature has
|
||
been changed inside the edit buffer then the previous saved value will be included in the
|
||
returned list).
|
||
\param index column index for attribute
|
||
\param uniqueValues out: result list
|
||
\param limit maximum number of values to return (or -1 if unlimited)
|
||
.. seealso:: minimumValue()
|
||
.. seealso:: maximumValue()
|
||
%End
|
||
|
||
QStringList uniqueStringsMatching( int index, const QString &substring, int limit = -1,
|
||
QgsFeedback *feedback = 0 ) const;
|
||
%Docstring
|
||
Returns unique string values of an attribute which contain a specified subset string. Subset
|
||
matching is done in a case-insensitive manner. Note that
|
||
in some circumstances when unsaved changes are present for the layer then the returned list
|
||
may contain outdated values (for instance when the attribute value in a saved feature has
|
||
been changed inside the edit buffer then the previous saved value will be included in the
|
||
returned list).
|
||
\param index column index for attribute
|
||
\param substring substring to match (case insensitive)
|
||
\param limit maxmum number of the values to return, or -1 to return all unique values
|
||
\param feedback optional feedback object for canceling request
|
||
:return: list of unique strings containing substring
|
||
:rtype: list of str
|
||
%End
|
||
|
||
QVariant minimumValue( int index ) const;
|
||
%Docstring
|
||
Returns the minimum value for an attribute column or an invalid variant in case of error.
|
||
Note that in some circumstances when unsaved changes are present for the layer then the
|
||
returned value may be outdated (for instance when the attribute value in a saved feature has
|
||
been changed inside the edit buffer then the previous saved value may be returned as the minimum).
|
||
.. seealso:: maximumValue()
|
||
.. seealso:: uniqueValues()
|
||
:rtype: QVariant
|
||
%End
|
||
|
||
QVariant maximumValue( int index ) const;
|
||
%Docstring
|
||
Returns the maximum value for an attribute column or an invalid variant in case of error.
|
||
Note that in some circumstances when unsaved changes are present for the layer then the
|
||
returned value may be outdated (for instance when the attribute value in a saved feature has
|
||
been changed inside the edit buffer then the previous saved value may be returned as the maximum).
|
||
.. seealso:: minimumValue()
|
||
.. seealso:: uniqueValues()
|
||
:rtype: QVariant
|
||
%End
|
||
|
||
QVariant aggregate( QgsAggregateCalculator::Aggregate aggregate,
|
||
const QString &fieldOrExpression,
|
||
const QgsAggregateCalculator::AggregateParameters ¶meters = QgsAggregateCalculator::AggregateParameters(),
|
||
QgsExpressionContext *context = 0,
|
||
bool *ok = 0 ) const;
|
||
%Docstring
|
||
Calculates an aggregated value from the layer's features.
|
||
\param aggregate aggregate to calculate
|
||
\param fieldOrExpression source field or expression to use as basis for aggregated values.
|
||
\param parameters parameters controlling aggregate calculation
|
||
\param context expression context for expressions and filters
|
||
\param ok if specified, will be set to true if aggregate calculation was successful
|
||
:return: calculated aggregate value
|
||
.. versionadded:: 2.16
|
||
:rtype: QVariant
|
||
%End
|
||
|
||
QList< QVariant > getValues( const QString &fieldOrExpression, bool &ok, bool selectedOnly = false, QgsFeedback *feedback = 0 ) const;
|
||
%Docstring
|
||
Fetches all values from a specified field name or expression.
|
||
\param fieldOrExpression field name or an expression string
|
||
\param ok will be set to false if field or expression is invalid, otherwise true
|
||
\param selectedOnly set to true to get values from selected features only
|
||
\param feedback optional feedback object to allow cancelation
|
||
:return: list of fetched values
|
||
.. versionadded:: 2.9
|
||
.. seealso:: getDoubleValues
|
||
:rtype: list of QVariant
|
||
%End
|
||
|
||
QList< double > getDoubleValues( const QString &fieldOrExpression, bool &ok, bool selectedOnly = false, int *nullCount = 0, QgsFeedback *feedback = 0 ) const;
|
||
%Docstring
|
||
Fetches all double values from a specified field name or expression. Null values or
|
||
invalid expression results are skipped.
|
||
\param fieldOrExpression field name or an expression string evaluating to a double value
|
||
\param ok will be set to false if field or expression is invalid, otherwise true
|
||
\param selectedOnly set to true to get values from selected features only
|
||
\param nullCount optional pointer to integer to store number of null values encountered in
|
||
\param feedback optional feedback object to allow cancelation
|
||
:return: list of fetched values
|
||
.. versionadded:: 2.9
|
||
.. seealso:: getValues
|
||
:rtype: list of float
|
||
%End
|
||
|
||
void setFeatureBlendMode( QPainter::CompositionMode blendMode );
|
||
%Docstring
|
||
Set the blending mode used for rendering each feature
|
||
%End
|
||
QPainter::CompositionMode featureBlendMode() const;
|
||
%Docstring
|
||
Returns the current blending mode for features
|
||
:rtype: QPainter.CompositionMode
|
||
%End
|
||
|
||
void setLayerTransparency( int layerTransparency );
|
||
%Docstring
|
||
Set the transparency for the vector layer
|
||
%End
|
||
int layerTransparency() const;
|
||
%Docstring
|
||
Returns the current transparency for the vector layer
|
||
:rtype: int
|
||
%End
|
||
|
||
virtual QString htmlMetadata() const;
|
||
|
||
|
||
void setSimplifyMethod( const QgsVectorSimplifyMethod &simplifyMethod );
|
||
%Docstring
|
||
Set the simplification settings for fast rendering of features
|
||
.. versionadded:: 2.2
|
||
%End
|
||
|
||
const QgsVectorSimplifyMethod &simplifyMethod() const;
|
||
%Docstring
|
||
Returns the simplification settings for fast rendering of features
|
||
.. versionadded:: 2.2
|
||
:rtype: QgsVectorSimplifyMethod
|
||
%End
|
||
|
||
bool simplifyDrawingCanbeApplied( const QgsRenderContext &renderContext, QgsVectorSimplifyMethod::SimplifyHint simplifyHint ) const;
|
||
%Docstring
|
||
Returns whether the VectorLayer can apply the specified simplification hint
|
||
.. note::
|
||
|
||
Do not use in 3rd party code - may be removed in future version!
|
||
.. versionadded:: 2.2
|
||
:rtype: bool
|
||
%End
|
||
|
||
QgsConditionalLayerStyles *conditionalStyles() const;
|
||
%Docstring
|
||
Return the conditional styles that are set for this layer. Style information is
|
||
used to render conditional formatting in the attribute table.
|
||
:return: Return a QgsConditionalLayerStyles object holding the conditional attribute
|
||
style information. Style information is generic and can be used for anything.
|
||
.. versionadded:: 2.12
|
||
:rtype: QgsConditionalLayerStyles
|
||
%End
|
||
|
||
QgsAttributeTableConfig attributeTableConfig() const;
|
||
%Docstring
|
||
Get the attribute table configuration object.
|
||
This defines the appearance of the attribute table.
|
||
:rtype: QgsAttributeTableConfig
|
||
%End
|
||
|
||
void setAttributeTableConfig( const QgsAttributeTableConfig &attributeTableConfig );
|
||
%Docstring
|
||
Set the attribute table configuration object.
|
||
This defines the appearance of the attribute table.
|
||
%End
|
||
|
||
QString mapTipTemplate() const;
|
||
%Docstring
|
||
The mapTip is a pretty, html representation for feature information.
|
||
|
||
It may also contain embedded expressions.
|
||
|
||
.. versionadded:: 3.0
|
||
:rtype: str
|
||
%End
|
||
|
||
void setMapTipTemplate( const QString &mapTipTemplate );
|
||
%Docstring
|
||
The mapTip is a pretty, html representation for feature information.
|
||
|
||
It may also contain embedded expressions.
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
virtual QgsExpressionContext createExpressionContext() const;
|
||
|
||
|
||
QgsEditFormConfig editFormConfig() const;
|
||
%Docstring
|
||
Get the configuration of the form used to represent this vector layer.
|
||
This is a writable configuration that can directly be changed in place.
|
||
|
||
:return: The configuration of this layers' form
|
||
|
||
.. versionadded:: 2.14
|
||
:rtype: QgsEditFormConfig
|
||
%End
|
||
|
||
void setEditFormConfig( const QgsEditFormConfig &editFormConfig );
|
||
%Docstring
|
||
Get the configuration of the form used to represent this vector layer.
|
||
This is a writable configuration that can directly be changed in place.
|
||
|
||
:return: The configuration of this layers' form
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
public slots:
|
||
|
||
void select( QgsFeatureId featureId );
|
||
%Docstring
|
||
Select feature by its ID
|
||
|
||
\param featureId The id of the feature to select
|
||
|
||
.. seealso:: select(QgsFeatureIds)
|
||
%End
|
||
|
||
void select( const QgsFeatureIds &featureIds );
|
||
%Docstring
|
||
Select features by their ID
|
||
|
||
\param featureIds The ids of the features to select
|
||
|
||
.. seealso:: select(QgsFeatureId)
|
||
%End
|
||
|
||
void deselect( const QgsFeatureId featureId );
|
||
%Docstring
|
||
Deselect feature by its ID
|
||
|
||
\param featureId The id of the feature to deselect
|
||
|
||
.. seealso:: deselect(QgsFeatureIds)
|
||
%End
|
||
|
||
void deselect( const QgsFeatureIds &featureIds );
|
||
%Docstring
|
||
Deselect features by their ID
|
||
|
||
\param featureIds The ids of the features to deselect
|
||
|
||
.. seealso:: deselect(QgsFeatureId)
|
||
%End
|
||
|
||
void removeSelection();
|
||
%Docstring
|
||
Clear selection
|
||
|
||
.. seealso:: selectByIds()
|
||
%End
|
||
|
||
virtual void updateExtents();
|
||
%Docstring
|
||
Update the extents for the layer. This is necessary if features are
|
||
added/deleted or the layer has been subsetted.
|
||
%End
|
||
|
||
bool startEditing();
|
||
%Docstring
|
||
Make layer editable.
|
||
This starts an edit session on this layer. Changes made in this edit session will not
|
||
be made persistent until commitChanges() is called and can be reverted by calling
|
||
rollBack().
|
||
:rtype: bool
|
||
%End
|
||
|
||
|
||
protected slots:
|
||
void invalidateSymbolCountedFlag();
|
||
|
||
signals:
|
||
|
||
void selectionChanged( const QgsFeatureIds &selected, const QgsFeatureIds &deselected, const bool clearAndSelect );
|
||
%Docstring
|
||
This signal is emitted when selection was changed
|
||
|
||
\param selected Newly selected feature ids
|
||
\param deselected Ids of all features which have previously been selected but are not any more
|
||
\param clearAndSelect In case this is set to true, the old selection was dismissed and the new selection corresponds to selected
|
||
%End
|
||
|
||
void layerModified();
|
||
%Docstring
|
||
This signal is emitted when modifications has been done on layer
|
||
%End
|
||
|
||
void beforeModifiedCheck() const;
|
||
%Docstring
|
||
Is emitted, when layer is checked for modifications. Use for last-minute additions
|
||
%End
|
||
|
||
void beforeEditingStarted();
|
||
%Docstring
|
||
Is emitted, before editing on this layer is started
|
||
%End
|
||
|
||
void editingStarted();
|
||
%Docstring
|
||
Is emitted, when editing on this layer has started
|
||
%End
|
||
|
||
void editingStopped();
|
||
%Docstring
|
||
Is emitted, when edited changes successfully have been written to the data provider
|
||
%End
|
||
|
||
void beforeCommitChanges();
|
||
%Docstring
|
||
Is emitted, before changes are committed to the data provider
|
||
%End
|
||
|
||
void beforeRollBack();
|
||
%Docstring
|
||
Is emitted, before changes are rolled back
|
||
%End
|
||
|
||
void attributeAdded( int idx );
|
||
%Docstring
|
||
Will be emitted, when a new attribute has been added to this vector layer.
|
||
Applies only to types QgsFields.OriginEdit, QgsFields.OriginProvider and QgsFields.OriginExpression
|
||
|
||
\param idx The index of the new attribute
|
||
|
||
.. seealso:: updatedFields()
|
||
%End
|
||
|
||
void beforeAddingExpressionField( const QString &fieldName );
|
||
%Docstring
|
||
Will be emitted, when an expression field is going to be added to this vector layer.
|
||
Applies only to types QgsFields.OriginExpression
|
||
|
||
\param fieldName The name of the attribute to be added
|
||
%End
|
||
|
||
void attributeDeleted( int idx );
|
||
%Docstring
|
||
Will be emitted, when an attribute has been deleted from this vector layer.
|
||
Applies only to types QgsFields.OriginEdit, QgsFields.OriginProvider and QgsFields.OriginExpression
|
||
|
||
\param idx The index of the deleted attribute
|
||
|
||
.. seealso:: updatedFields()
|
||
%End
|
||
|
||
void beforeRemovingExpressionField( int idx );
|
||
%Docstring
|
||
Will be emitted, when an expression field is going to be deleted from this vector layer.
|
||
Applies only to types QgsFields.OriginExpression
|
||
|
||
\param idx The index of the attribute to be deleted
|
||
%End
|
||
|
||
void featureAdded( QgsFeatureId fid );
|
||
%Docstring
|
||
Emitted when a new feature has been added to the layer
|
||
|
||
\param fid The id of the new feature
|
||
%End
|
||
|
||
void featureDeleted( QgsFeatureId fid );
|
||
%Docstring
|
||
Emitted when a feature has been deleted.
|
||
|
||
If you do expensive operations in a slot connected to this, you should prever to use
|
||
featuresDeleted( const QgsFeatureIds& ).
|
||
|
||
\param fid The id of the feature which has been deleted
|
||
%End
|
||
|
||
void featuresDeleted( const QgsFeatureIds &fids );
|
||
%Docstring
|
||
Emitted when features have been deleted.
|
||
|
||
If features are deleted within an edit command, this will only be emitted once at the end
|
||
to allow connected slots to minimize the overhead.
|
||
If features are deleted outside of an edit command, this signal will be emitted once per feature.
|
||
|
||
\param fids The feature ids that have been deleted.
|
||
%End
|
||
|
||
void updatedFields();
|
||
%Docstring
|
||
Is emitted, whenever the fields available from this layer have been changed.
|
||
This can be due to manually adding attributes or due to a join.
|
||
%End
|
||
|
||
|
||
void attributeValueChanged( QgsFeatureId fid, int idx, const QVariant &value );
|
||
%Docstring
|
||
Is emitted whenever an attribute value change is done in the edit buffer.
|
||
Note that at this point the attribute change is not yet saved to the provider.
|
||
|
||
\param fid The id of the changed feature
|
||
\param idx The attribute index of the changed attribute
|
||
\param value The new value of the attribute
|
||
%End
|
||
|
||
void geometryChanged( QgsFeatureId fid, const QgsGeometry &geometry );
|
||
%Docstring
|
||
Is emitted whenever a geometry change is done in the edit buffer.
|
||
Note that at this point the geometry change is not yet saved to the provider.
|
||
|
||
\param fid The id of the changed feature
|
||
\param geometry The new geometry
|
||
%End
|
||
|
||
void committedAttributesDeleted( const QString &layerId, const QgsAttributeList &deletedAttributes );
|
||
%Docstring
|
||
This signal is emitted, when attributes are deleted from the provider
|
||
%End
|
||
void committedAttributesAdded( const QString &layerId, const QList<QgsField> &addedAttributes );
|
||
%Docstring
|
||
This signal is emitted, when attributes are added to the provider
|
||
%End
|
||
void committedFeaturesAdded( const QString &layerId, const QgsFeatureList &addedFeatures );
|
||
%Docstring
|
||
This signal is emitted, when features are added to the provider
|
||
%End
|
||
void committedFeaturesRemoved( const QString &layerId, const QgsFeatureIds &deletedFeatureIds );
|
||
%Docstring
|
||
This signal is emitted, when features are deleted from the provider
|
||
%End
|
||
void committedAttributeValuesChanges( const QString &layerId, const QgsChangedAttributesMap &changedAttributesValues );
|
||
%Docstring
|
||
This signal is emitted, when attribute value changes are saved to the provider
|
||
%End
|
||
void committedGeometriesChanges( const QString &layerId, const QgsGeometryMap &changedGeometries );
|
||
%Docstring
|
||
This signal is emitted, when geometry changes are saved to the provider
|
||
%End
|
||
|
||
void labelingFontNotFound( QgsVectorLayer *layer, const QString &fontfamily );
|
||
%Docstring
|
||
Emitted when the font family defined for labeling layer is not found on system
|
||
%End
|
||
|
||
void featureBlendModeChanged( QPainter::CompositionMode blendMode );
|
||
%Docstring
|
||
Signal emitted when setFeatureBlendMode() is called
|
||
%End
|
||
|
||
void layerTransparencyChanged( int layerTransparency );
|
||
%Docstring
|
||
Signal emitted when setLayerTransparency() is called
|
||
%End
|
||
|
||
void editCommandStarted( const QString &text );
|
||
%Docstring
|
||
Signal emitted when a new edit command has been started
|
||
|
||
\param text Description for this edit command
|
||
%End
|
||
|
||
void editCommandEnded();
|
||
%Docstring
|
||
Signal emitted, when an edit command successfully ended
|
||
.. note::
|
||
|
||
This does not mean it is also committed, only that it is written
|
||
to the edit buffer. See beforeCommitChanges()
|
||
%End
|
||
|
||
void editCommandDestroyed();
|
||
%Docstring
|
||
Signal emitted, whan an edit command is destroyed
|
||
.. note::
|
||
|
||
This is not a rollback, it is only related to the current edit command.
|
||
See beforeRollBack()
|
||
%End
|
||
|
||
void readCustomSymbology( const QDomElement &element, QString &errorMessage );
|
||
%Docstring
|
||
Signal emitted whenever the symbology (QML-file) for this layer is being read.
|
||
If there is custom style information saved in the file, you can connect to this signal
|
||
and update the layer style accordingly.
|
||
|
||
\param element The XML layer style element.
|
||
|
||
\param errorMessage Write error messages into this string.
|
||
%End
|
||
|
||
void writeCustomSymbology( QDomElement &element, QDomDocument &doc, QString &errorMessage ) const;
|
||
%Docstring
|
||
Signal emitted whenever the symbology (QML-file) for this layer is being written.
|
||
If there is custom style information you want to save to the file, you can connect
|
||
to this signal and update the element accordingly.
|
||
|
||
\param element The XML element where you can add additional style information to.
|
||
\param doc The XML document that you can use to create new XML nodes.
|
||
\param errorMessage Write error messages into this string.
|
||
%End
|
||
|
||
void mapTipTemplateChanged();
|
||
%Docstring
|
||
Emitted when the map tip changes
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
void displayExpressionChanged();
|
||
%Docstring
|
||
Emitted when the display expression changes
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
void raiseError( const QString &msg );
|
||
%Docstring
|
||
Signals an error related to this vector layer.
|
||
%End
|
||
|
||
void editFormConfigChanged();
|
||
%Docstring
|
||
Will be emitted whenever the edit form configuration of this layer changes.
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
void readOnlyChanged();
|
||
%Docstring
|
||
Emitted when the read only state of this layer is changed.
|
||
Only applies to manually set readonly state, not to the edit mode.
|
||
|
||
.. versionadded:: 3.0
|
||
%End
|
||
|
||
|
||
protected:
|
||
virtual void setExtent( const QgsRectangle &rect );
|
||
|
||
%Docstring
|
||
Set the extent
|
||
%End
|
||
|
||
private: // Private methods
|
||
QgsVectorLayer( const QgsVectorLayer &rhs );
|
||
};
|
||
|
||
/************************************************************************
|
||
* This file has been generated automatically from *
|
||
* *
|
||
* src/core/qgsvectorlayer.h *
|
||
* *
|
||
* Do not edit manually ! Edit header and run scripts/sipify.pl again *
|
||
************************************************************************/
|