QGIS API Documentation  3.0.2-Girona (307d082)
Public Member Functions | Static Public Member Functions | List of all members
QgsProcessingParameterVectorLayer Class Reference

A vector layer (with or without geometry) parameter for processing algorithms. More...

#include <qgsprocessingparameters.h>

Inheritance diagram for QgsProcessingParameterVectorLayer:
Inheritance graph
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Public Member Functions

 QgsProcessingParameterVectorLayer (const QString &name, const QString &description=QString(), const QList< int > &types=QList< int >(), const QVariant &defaultValue=QVariant(), bool optional=false)
 Constructor for QgsProcessingParameterVectorLayer. More...
 
bool checkValueIsAcceptable (const QVariant &input, QgsProcessingContext *context=nullptr) const override
 Checks whether the specified input value is acceptable for the parameter. More...
 
QgsProcessingParameterDefinitionclone () const override
 Creates a clone of the parameter definition. More...
 
bool fromVariantMap (const QVariantMap &map) override
 Restores this parameter to a QVariantMap. More...
 
QVariantMap toVariantMap () const override
 Saves this parameter to a QVariantMap. More...
 
QString type () const override
 Unique parameter type name. More...
 
QString valueAsPythonString (const QVariant &value, QgsProcessingContext &context) const override
 Returns a string version of the parameter input value, which is suitable for use as an input parameter value when running an algorithm directly from a Python command. More...
 
- Public Member Functions inherited from QgsProcessingParameterDefinition
 QgsProcessingParameterDefinition (const QString &name, const QString &description=QString(), const QVariant &defaultValue=QVariant(), bool optional=false)
 Constructor for QgsProcessingParameterDefinition. More...
 
virtual ~QgsProcessingParameterDefinition ()=default
 
QgsProcessingAlgorithmalgorithm () const
 Returns a pointer to the algorithm which owns this parameter. More...
 
virtual QString asScriptCode () const
 Returns the parameter definition encoded in a string which can be used within a Python processing script. More...
 
QVariant defaultValue () const
 Returns the default value for the parameter. More...
 
virtual QStringList dependsOnOtherParameters () const
 Returns a list of other parameter names on which this parameter is dependent (e.g. More...
 
QString description () const
 Returns the description for the parameter. More...
 
QString dynamicLayerParameterName () const
 Returns the name of the parameter for a layer linked to a dynamic parameter, or an empty string if this is not set. More...
 
QgsPropertyDefinition dynamicPropertyDefinition () const
 Returns the property definition for dynamic properties. More...
 
Flags flags () const
 Returns any flags associated with the parameter. More...
 
virtual bool isDestination () const
 Returns true if this parameter represents a file or layer destination, e.g. More...
 
bool isDynamic () const
 Returns true if the parameter supports is dynamic, and can support data-defined values (i.e. More...
 
QVariantMap metadata () const
 Returns the parameter's freeform metadata. More...
 
QVariantMap & metadata ()
 Returns the parameter's freeform metadata. More...
 
QString name () const
 Returns the name of the parameter. More...
 
QgsProcessingProviderprovider () const
 Returns a pointer to the provider for the algorithm which owns this parameter. More...
 
void setDefaultValue (const QVariant &value)
 Sets the default value for the parameter. More...
 
void setDescription (const QString &description)
 Sets the description for the parameter. More...
 
void setDynamicLayerParameterName (const QString &name)
 Sets the name for the parameter for a layer linked to a dynamic parameter, or an empty string if this is not set. More...
 
void setDynamicPropertyDefinition (const QgsPropertyDefinition &definition)
 Sets the property definition for dynamic properties. More...
 
void setFlags (Flags flags)
 Sets the flags associated with the parameter. More...
 
void setIsDynamic (bool dynamic)
 Sets whether the parameter is dynamic, and can support data-defined values (i.e. More...
 
void setMetadata (const QVariantMap &metadata)
 Sets the parameter's freeform metadata. More...
 
void setName (const QString &name)
 Sets the name of the parameter. More...
 
virtual QString toolTip () const
 Returns a formatted tooltip for use with the parameter, which gives helpful information like parameter description, ID, and extra content like default values (depending on parameter type). More...
 
- Public Member Functions inherited from QgsProcessingParameterLimitedDataTypes
 QgsProcessingParameterLimitedDataTypes (const QList< int > &types=QList< int >())
 Constructor for QgsProcessingParameterLimitedDataTypes, with a list of acceptable data types. More...
 
QList< int > dataTypes () const
 Returns the geometry types for sources acceptable by the parameter. More...
 
void setDataTypes (const QList< int > &types)
 Sets the geometry types for sources acceptable by the parameter. More...
 

Static Public Member Functions

static QgsProcessingParameterVectorLayerfromScriptCode (const QString &name, const QString &description, bool isOptional, const QString &definition)
 Creates a new parameter using the definition from a script code. More...
 
static QString typeName ()
 Returns the type name for the parameter class. More...
 

Additional Inherited Members

- Public Types inherited from QgsProcessingParameterDefinition
enum  Flag { FlagAdvanced = 1 << 1, FlagHidden = 1 << 2, FlagOptional = 1 << 3 }
 Parameter flags. More...
 
- Protected Attributes inherited from QgsProcessingParameterDefinition
QgsProcessingAlgorithmmAlgorithm = nullptr
 Pointer to algorithm which owns this parameter. More...
 
QVariant mDefault
 Default value for parameter. More...
 
QString mDescription
 Parameter description. More...
 
QString mDynamicLayerParameterName
 Linked vector layer parameter name for dynamic properties. More...
 
Flags mFlags
 Parameter flags. More...
 
bool mIsDynamic = false
 True for dynamic parameters, which can have data-defined (QgsProperty) based values. More...
 
QVariantMap mMetadata
 Freeform metadata for parameter. Mostly used by widget wrappers to customise their appearance and behavior. More...
 
QString mName
 Parameter name. More...
 
QgsPropertyDefinition mPropertyDefinition
 Data defined property definition. More...
 
- Protected Attributes inherited from QgsProcessingParameterLimitedDataTypes
QList< int > mDataTypes
 List of acceptable data types for the parameter. More...
 

Detailed Description

A vector layer (with or without geometry) parameter for processing algorithms.

Consider using the more versatile QgsProcessingParameterFeatureSource wherever possible.

Since
QGIS 3.0

Definition at line 1532 of file qgsprocessingparameters.h.

Constructor & Destructor Documentation

◆ QgsProcessingParameterVectorLayer()

QgsProcessingParameterVectorLayer::QgsProcessingParameterVectorLayer ( const QString &  name,
const QString &  description = QString(),
const QList< int > &  types = QList< int >(),
const QVariant &  defaultValue = QVariant(),
bool  optional = false 
)

Constructor for QgsProcessingParameterVectorLayer.

Definition at line 2565 of file qgsprocessingparameters.cpp.

Member Function Documentation

◆ checkValueIsAcceptable()

bool QgsProcessingParameterVectorLayer::checkValueIsAcceptable ( const QVariant &  input,
QgsProcessingContext context = nullptr 
) const
overridevirtual

Checks whether the specified input value is acceptable for the parameter.

Returns true if the value can be accepted. The optional context parameter can be specified to allow a more stringent check to be performed, capable of checking for the presence of required layers and other factors within the context.

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 2577 of file qgsprocessingparameters.cpp.

◆ clone()

QgsProcessingParameterDefinition * QgsProcessingParameterVectorLayer::clone ( ) const
overridevirtual

Creates a clone of the parameter definition.

Implements QgsProcessingParameterDefinition.

Definition at line 2572 of file qgsprocessingparameters.cpp.

◆ fromScriptCode()

QgsProcessingParameterVectorLayer * QgsProcessingParameterVectorLayer::fromScriptCode ( const QString &  name,
const QString &  description,
bool  isOptional,
const QString &  definition 
)
static

Creates a new parameter using the definition from a script code.

Definition at line 2652 of file qgsprocessingparameters.cpp.

◆ fromVariantMap()

bool QgsProcessingParameterVectorLayer::fromVariantMap ( const QVariantMap &  map)
overridevirtual

Restores this parameter to a QVariantMap.

Subclasses should ensure that they call the base class method.

See also
toVariantMap()

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 2640 of file qgsprocessingparameters.cpp.

◆ toVariantMap()

QVariantMap QgsProcessingParameterVectorLayer::toVariantMap ( ) const
overridevirtual

Saves this parameter to a QVariantMap.

Subclasses should ensure that they call the base class method and then extend the result with additional properties.

See also
fromVariantMap()

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 2628 of file qgsprocessingparameters.cpp.

◆ type()

QString QgsProcessingParameterVectorLayer::type ( ) const
inlineoverridevirtual

Unique parameter type name.

Implements QgsProcessingParameterDefinition.

Definition at line 1550 of file qgsprocessingparameters.h.

◆ typeName()

static QString QgsProcessingParameterVectorLayer::typeName ( )
inlinestatic

Returns the type name for the parameter class.

Definition at line 1548 of file qgsprocessingparameters.h.

◆ valueAsPythonString()

QString QgsProcessingParameterVectorLayer::valueAsPythonString ( const QVariant &  value,
QgsProcessingContext context 
) const
overridevirtual

Returns a string version of the parameter input value, which is suitable for use as an input parameter value when running an algorithm directly from a Python command.

The returned value must be correctly escaped - e.g. string values must be wrapped in ' 's.

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 2606 of file qgsprocessingparameters.cpp.


The documentation for this class was generated from the following files: