QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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Public Member Functions | Static Public Member Functions | List of all members
QgsProcessingParameterAlignRasterLayers Class Reference

A parameter for Processing algorithms that need a list of input raster layers to align - this parameter provides Processing framework's adapter for QList<QgsAlignRaster::Item>. More...

#include <qgsprocessingparameteralignrasterlayers.h>

Inheritance diagram for QgsProcessingParameterAlignRasterLayers:
Inheritance graph
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Public Member Functions

 QgsProcessingParameterAlignRasterLayers (const QString &name, const QString &description=QString())
 Constructor for QgsProcessingParameterAlignRasterLayers.
 
QString asPythonString (QgsProcessing::PythonOutputType outputType=QgsProcessing::PythonQgsProcessingAlgorithmSubclass) const override
 Returns the parameter definition as a Python command which can be used within a Python Processing script.
 
bool checkValueIsAcceptable (const QVariant &input, QgsProcessingContext *context=nullptr) const override
 Checks whether the specified input value is acceptable for the parameter.
 
QgsProcessingParameterDefinitionclone () const override
 Creates a clone of the parameter definition.
 
QString type () const override
 Unique parameter type name.
 
QVariant valueAsJsonObject (const QVariant &value, QgsProcessingContext &context) const override
 Returns a version of the parameter input value, which is suitable for use in a JSON object.
 
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.
 
QString valueAsString (const QVariant &value, QgsProcessingContext &context, bool &ok) const override
 Returns a string version of the parameter input value (if possible).
 
- Public Member Functions inherited from QgsProcessingParameterDefinition
 QgsProcessingParameterDefinition (const QString &name, const QString &description=QString(), const QVariant &defaultValue=QVariant(), bool optional=false, const QString &help=QString())
 Constructor for QgsProcessingParameterDefinition.
 
virtual ~QgsProcessingParameterDefinition ()=default
 
QStringList additionalExpressionContextVariables () const
 Returns a list of additional expression context variables which are available for use when evaluating this parameter.
 
QgsProcessingAlgorithmalgorithm () const
 Returns a pointer to the algorithm which owns this parameter.
 
virtual QString asScriptCode () const
 Returns the parameter definition encoded in a string which can be used within a Processing script.
 
QVariant defaultValue () const
 Returns the default value for the parameter.
 
QVariant defaultValueForGui () const
 Returns the default value to use for the parameter in a GUI.
 
virtual QStringList dependsOnOtherParameters () const
 Returns a list of other parameter names on which this parameter is dependent (e.g.
 
QString description () const
 Returns the description for the parameter.
 
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.
 
QgsPropertyDefinition dynamicPropertyDefinition () const
 Returns the property definition for dynamic properties.
 
Flags flags () const
 Returns any flags associated with the parameter.
 
virtual bool fromVariantMap (const QVariantMap &map)
 Restores this parameter to a QVariantMap.
 
QVariant guiDefaultValueOverride () const
 Returns the default value to use in the GUI for the parameter.
 
QString help () const
 Returns the help for the parameter.
 
virtual bool isDestination () const
 Returns true if this parameter represents a file or layer destination, e.g.
 
bool isDynamic () const
 Returns true if the parameter supports is dynamic, and can support data-defined values (i.e.
 
QVariantMap & metadata ()
 Returns the parameter's freeform metadata.
 
QVariantMap metadata () const
 Returns the parameter's freeform metadata.
 
QString name () const
 Returns the name of the parameter.
 
QgsProcessingProviderprovider () const
 Returns a pointer to the provider for the algorithm which owns this parameter.
 
void setAdditionalExpressionContextVariables (const QStringList &variables)
 Sets a list of additional expression context variables which are available for use when evaluating this parameter.
 
void setDefaultValue (const QVariant &value)
 Sets the default value for the parameter.
 
void setDescription (const QString &description)
 Sets the description for the parameter.
 
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.
 
void setDynamicPropertyDefinition (const QgsPropertyDefinition &definition)
 Sets the property definition for dynamic properties.
 
void setFlags (Flags flags)
 Sets the flags associated with the parameter.
 
void setGuiDefaultValueOverride (const QVariant &value)
 Sets the default value to use for the parameter in GUI widgets.
 
void setHelp (const QString &help)
 Sets the help for the parameter.
 
void setIsDynamic (bool dynamic)
 Sets whether the parameter is dynamic, and can support data-defined values (i.e.
 
void setMetadata (const QVariantMap &metadata)
 Sets the parameter's freeform metadata.
 
void setName (const QString &name)
 Sets the name of the parameter.
 
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).
 
virtual QVariantMap toVariantMap () const
 Saves this parameter to a QVariantMap.
 
virtual QString valueAsPythonComment (const QVariant &value, QgsProcessingContext &context) const
 Returns a Python comment explaining a parameter value, or an empty string if no comment is required.
 
virtual QStringList valueAsStringList (const QVariant &value, QgsProcessingContext &context, bool &ok) const
 Returns a string list version of the parameter input value (if possible).
 

Static Public Member Functions

static QVariantMap itemAsVariantMap (const QgsAlignRasterData::RasterItem &item)
 Converts a single input layer to QVariant representation (a QVariantMap)
 
static QList< QgsAlignRasterData::RasterItemparameterAsItems (const QVariant &layersVariant, QgsProcessingContext &context)
 Converts a QVariant value (a QVariantList) to a list of input layers.
 
static QString typeName ()
 Returns the type name for the parameter class.
 
static QgsAlignRasterData::RasterItem variantMapAsItem (const QVariantMap &layerVariantMap, QgsProcessingContext &context)
 Converts a QVariant value (a QVariantMap) to a single input layer.
 

Additional Inherited Members

- Public Types inherited from QgsProcessingParameterDefinition
enum  Flag { FlagAdvanced = 1 << 1 , FlagHidden = 1 << 2 , FlagOptional = 1 << 3 , FlagIsModelOutput = 1 << 4 }
 Parameter flags. More...
 
enum class  ValueAsStringFlag : int { AllowMapLayerValues = 1 << 0 }
 Flags for passing to the valueAsStringPrivate() method. More...
 
- Protected Member Functions inherited from QgsProcessingParameterDefinition
QVariant defaultGuiValueFromSetting () const
 Default gui value for an algorithm parameter from settings.
 
QVariant valueAsJsonObjectPrivate (const QVariant &value, QgsProcessingContext &context, ValueAsStringFlags flags) const
 Internal method for evaluating values as JSON objects.
 
QString valueAsStringPrivate (const QVariant &value, QgsProcessingContext &context, bool &ok, ValueAsStringFlags flags) const
 Internal method for evaluating values as string.
 
- Protected Attributes inherited from QgsProcessingParameterDefinition
QStringList mAdditionalExpressionVariables
 Additional expression context variables exposed for use by this parameter.
 
QgsProcessingAlgorithmmAlgorithm = nullptr
 Pointer to algorithm which owns this parameter.
 
QVariant mDefault
 Default value for parameter.
 
QString mDescription
 Parameter description.
 
QString mDynamicLayerParameterName
 Linked vector layer parameter name for dynamic properties.
 
Flags mFlags
 Parameter flags.
 
QVariant mGuiDefault
 Default value for parameter in GUI.
 
QString mHelp
 Parameter help.
 
bool mIsDynamic = false
 True for dynamic parameters, which can have data-defined (QgsProperty) based values.
 
QVariantMap mMetadata
 Freeform metadata for parameter. Mostly used by widget wrappers to customize their appearance and behavior.
 
QString mName
 Parameter name.
 
QgsPropertyDefinition mPropertyDefinition
 Data defined property definition.
 

Detailed Description

A parameter for Processing algorithms that need a list of input raster layers to align - this parameter provides Processing framework's adapter for QList<QgsAlignRaster::Item>.

A valid value for this parameter is a list (QVariantList), where each item is a map (QVariantMap) in this form: { 'inputFile': string, 'outputFile': string, 'resampleMethod': int, 'rescale': bool, }

Also it can accept lists (either string lists or QgsMapLayer list) as well as individual layer object or string representing layer source.

Static functions parametersAsItems(), variantMapAsItem(), itemAsVariantMap() provide conversion between QgsAlignRaster::Item representation and QVariant representation.

Since
QGIS 3.34

Definition at line 47 of file qgsprocessingparameteralignrasterlayers.h.

Constructor & Destructor Documentation

◆ QgsProcessingParameterAlignRasterLayers()

QgsProcessingParameterAlignRasterLayers::QgsProcessingParameterAlignRasterLayers ( const QString &  name,
const QString &  description = QString() 
)

Member Function Documentation

◆ asPythonString()

QString QgsProcessingParameterAlignRasterLayers::asPythonString ( QgsProcessing::PythonOutputType  outputType = QgsProcessing::PythonQgsProcessingAlgorithmSubclass) const
overridevirtual

Returns the parameter definition as a Python command which can be used within a Python Processing script.

The outputType argument specifies the desired output format for the Python string, i.e. the intended end use of the generated Python code.

Since
QGIS 3.6

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 141 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ checkValueIsAcceptable()

bool QgsProcessingParameterAlignRasterLayers::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 36 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ clone()

QgsProcessingParameterDefinition * QgsProcessingParameterAlignRasterLayers::clone ( ) const
overridevirtual

Creates a clone of the parameter definition.

Implements QgsProcessingParameterDefinition.

Definition at line 26 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ itemAsVariantMap()

QVariantMap QgsProcessingParameterAlignRasterLayers::itemAsVariantMap ( const QgsAlignRasterData::RasterItem item)
static

Converts a single input layer to QVariant representation (a QVariantMap)

Definition at line 244 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ parameterAsItems()

QList< QgsAlignRasterData::RasterItem > QgsProcessingParameterAlignRasterLayers::parameterAsItems ( const QVariant &  layersVariant,
QgsProcessingContext context 
)
static

Converts a QVariant value (a QVariantList) to a list of input layers.

Definition at line 165 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ type()

QString QgsProcessingParameterAlignRasterLayers::type ( ) const
overridevirtual

Unique parameter type name.

Implements QgsProcessingParameterDefinition.

Definition at line 31 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ typeName()

static QString QgsProcessingParameterAlignRasterLayers::typeName ( )
inlinestatic

Returns the type name for the parameter class.

Definition at line 62 of file qgsprocessingparameteralignrasterlayers.h.

◆ valueAsJsonObject()

QVariant QgsProcessingParameterAlignRasterLayers::valueAsJsonObject ( const QVariant &  value,
QgsProcessingContext context 
) const
overridevirtual

Returns a version of the parameter input value, which is suitable for use in a JSON object.

This method must return only simple values which can be losslessly encapsulated in a serialized JSON map. For instance, any QGIS class values (such as QgsCoordinateReferenceSystem) must be converted to a simple string or numeric value equivalent.

See also
valueAsPythonString()
valueAsString()
Since
QGIS 3.24

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 160 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ valueAsPythonString()

QString QgsProcessingParameterAlignRasterLayers::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.

See also
valueAsJsonObject()
valueAsString()

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 123 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ valueAsString()

QString QgsProcessingParameterAlignRasterLayers::valueAsString ( const QVariant &  value,
QgsProcessingContext context,
bool &  ok 
) const
overridevirtual

Returns a string version of the parameter input value (if possible).

Parameters
valuevalue to convert
contextprocessing context
okwill be set to true if value could be represented as a string.
Returns
value converted to string
See also
valueAsStringList()
valueAsJsonObject()
valueAsPythonString()
Since
QGIS 3.24

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 155 of file qgsprocessingparameteralignrasterlayers.cpp.

◆ variantMapAsItem()

QgsAlignRasterData::RasterItem QgsProcessingParameterAlignRasterLayers::variantMapAsItem ( const QVariantMap &  layerVariantMap,
QgsProcessingContext context 
)
static

Converts a QVariant value (a QVariantMap) to a single input layer.

Definition at line 219 of file qgsprocessingparameteralignrasterlayers.cpp.


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