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198 lines
6.7 KiB
Plaintext
198 lines
6.7 KiB
Plaintext
/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgscoordinatetransformcontext.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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class QgsCoordinateTransformContext
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{
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%Docstring
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Contains information about the context in which a coordinate transform is executed.
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The context stores various information regarding which coordinate transforms should
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be used when transforming points from a source to destination coordinate reference
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system.
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The highest priority transforms are those set using addSourceDestinationDatumTransform()
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and which the transform has a matching source to destination CRS pair.
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Failing this, if the source CRS has a matching transform specified by
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addSourceDatumTransform() then this datum transform will be used. The same logic
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applies for destination CRS transforms set using addDestinationDatumTransform().
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.. note::
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QgsCoordinateTransformContext objects are thread safe for read and write.
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.. note::
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QgsCoordinateTransformContext objects are implicitly shared.
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.. versionadded:: 3.0
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%End
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%TypeHeaderCode
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#include "qgscoordinatetransformcontext.h"
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%End
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public:
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QgsCoordinateTransformContext();
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%Docstring
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Constructor for QgsCoordinateTransformContext.
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%End
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QgsCoordinateTransformContext( const QgsCoordinateTransformContext &rhs );
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%Docstring
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Copy constructor
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%End
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void clear();
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%Docstring
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Clears all stored transform information from the context.
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%End
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QMap<QString, int> sourceDatumTransforms() const;
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%Docstring
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Returns the stored mapping for source CRS to associated datum transform to use.
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The map keys will be QgsCoordinateReferenceSystems.authid()s.
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\warning This method should not be used to calculate the corresponding datum transforms
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to use for a coordinate transform. Instead, always use calculateDatumTransforms()
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to determine this.
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.. seealso:: addSourceDatumTransform()
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.. seealso:: destinationDatumTransforms()
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:rtype: QMap<str, int>
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%End
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bool addSourceDatumTransform( const QgsCoordinateReferenceSystem &crs, int transform );
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%Docstring
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Adds a new ``transform`` to use when projecting coordinates from the specified source
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``crs``.
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If ``transform`` is -1, then any existing source transform for the ``crs`` will be removed.
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Returns true if the new transform was added successfully.
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\warning Transforms set using this method may be overridden by specific source/destination
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transforms set by addSourceDestinationDatumTransform().
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.. seealso:: sourceDatumTransforms()
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.. seealso:: addDestinationDatumTransform()
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:rtype: bool
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%End
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QMap< QString, int > destinationDatumTransforms() const;
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%Docstring
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Returns the stored mapping for destination CRS to associated datum transform to use.
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The map keys will be QgsCoordinateReferenceSystems.authid()s.
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\warning This method should not be used to calculate the corresponding datum transforms
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to use for a coordinate transform. Instead, always use calculateDatumTransforms()
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to determine this.
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.. seealso:: addDestinationDatumTransform()
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.. seealso:: sourceDatumTransforms()
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:rtype: QMap< str, int >
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%End
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bool addDestinationDatumTransform( const QgsCoordinateReferenceSystem &crs, int transform );
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%Docstring
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Adds a new ``transform`` to use when projecting coordinates to the specified destination
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``crs``.
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If ``transform`` is -1, then any existing destination transform for the ``crs`` will be removed.
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Returns true if the new transform was added successfully.
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\warning Transforms set using this method may be overridden by specific source/destination
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transforms set by addSourceDestinationDatumTransform().
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.. seealso:: destinationDatumTransforms()
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.. seealso:: addSourceDatumTransform()
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:rtype: bool
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%End
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QMap< QPair< QString, QString>, QPair< int, int > > sourceDestinationDatumTransforms() const;
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%Docstring
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Returns the stored mapping for source to destination CRS pairs to associated datum transforms to use.
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The map keys will be QgsCoordinateReferenceSystems.authid()s.
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\warning This method should not be used to calculate the corresponding datum transforms
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to use for a coordinate transform. Instead, always use calculateDatumTransforms()
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to determine this.
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.. seealso:: addSourceDestinationDatumTransform()
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:rtype: QMap< QPair< str, QString>, QPair< int, int > >
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%End
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bool addSourceDestinationDatumTransform( const QgsCoordinateReferenceSystem &sourceCrs,
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const QgsCoordinateReferenceSystem &destinationCrs,
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int sourceTransform,
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int destinationTransform );
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%Docstring
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Adds a new ``sourceTransform`` and ``destinationTransform`` to use when projecting coordinates
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from the the specified ``sourceCrs`` to the specified ``destinationCrs``.
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If either ``sourceTransform`` or ``destinationTransform`` is -1, then any existing source to destination
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transform for the crs pair will be removed.
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Returns true if the new transform pair was added successfully.
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.. note::
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Transforms set using this method will override any specific source or destination
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transforms set by addSourceDatumTransform() or addDestinationDatumTransform().
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.. seealso:: sourceDestinationDatumTransforms()
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:rtype: bool
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%End
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QPair< int, int > calculateDatumTransforms( const QgsCoordinateReferenceSystem &source,
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const QgsCoordinateReferenceSystem &destination ) const;
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%Docstring
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Returns the pair of source and destination datum transforms to use
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for a transform from the specified ``source`` CRS to ``destination`` CRS.
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Returns -1 if a datum transform should not be used for the source or
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destination.
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:rtype: QPair< int, int >
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%End
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void readXml( const QDomElement &element, const QDomDocument &document, const QgsReadWriteContext &context );
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%Docstring
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Reads the context's state from a DOM ``element``.
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.. seealso:: writeXml()
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%End
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void writeXml( QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context ) const;
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%Docstring
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Writes the context's state to a DOM ``element``.
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.. seealso:: readXml()
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%End
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};
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/************************************************************************
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* This file has been generated automatically from *
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* *
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* src/core/qgscoordinatetransformcontext.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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