QGIS API Documentation 3.41.0-Master (d5b93354e9c)
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An input file or folder parameter for processing algorithms. More...
#include <qgsprocessingparameters.h>
Public Member Functions | |
QgsProcessingParameterFile (const QString &name, const QString &description=QString(), Qgis::ProcessingFileParameterBehavior behavior=Qgis::ProcessingFileParameterBehavior::File, const QString &extension=QString(), const QVariant &defaultValue=QVariant(), bool optional=false, const QString &fileFilter=QString()) | |
Constructor for QgsProcessingParameterFile. | |
QString | asPythonString (QgsProcessing::PythonOutputType outputType=QgsProcessing::PythonOutputType::PythonQgsProcessingAlgorithmSubclass) const override |
Returns the parameter definition as a Python command which can be used within a Python Processing script. | |
QString | asScriptCode () const override |
Returns the parameter definition encoded in a string which can be used within a Processing script. | |
Qgis::ProcessingFileParameterBehavior | behavior () const |
Returns the parameter behavior (e.g. | |
bool | checkValueIsAcceptable (const QVariant &input, QgsProcessingContext *context=nullptr) const override |
Checks whether the specified input value is acceptable for the parameter. | |
QgsProcessingParameterDefinition * | clone () const override |
Creates a clone of the parameter definition. | |
QString | createFileFilter () const override |
This method needs to be reimplemented in all classes which implement this interface and return a file filter. | |
QString | extension () const |
Returns any specified file extension for the parameter. | |
QString | fileFilter () const |
Returns the file filter string for file destinations compatible with this parameter. | |
bool | fromVariantMap (const QVariantMap &map) override |
Restores this parameter to a QVariantMap. | |
void | setBehavior (Qgis::ProcessingFileParameterBehavior behavior) |
Sets the parameter behavior (e.g. | |
void | setExtension (const QString &extension) |
Sets a file extension for the parameter. | |
void | setFileFilter (const QString &filter) |
Sets the file filter string for file destinations compatible with this parameter. | |
QVariantMap | toVariantMap () const override |
Saves this parameter to a QVariantMap. | |
QString | type () const override |
Unique parameter type name. | |
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. | |
QgsProcessingAlgorithm * | algorithm () const |
Returns a pointer to the algorithm which owns this parameter. | |
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. | |
Qgis::ProcessingParameterFlags | flags () const |
Returns any flags associated with the parameter. | |
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. | |
QgsProcessingProvider * | provider () 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 (Qgis::ProcessingParameterFlags 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 QVariant | valueAsJsonObject (const QVariant &value, QgsProcessingContext &context) const |
Returns a version of the parameter input value, which is suitable for use in a JSON object. | |
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 QString | valueAsPythonString (const QVariant &value, QgsProcessingContext &context) const |
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. | |
virtual QString | valueAsString (const QVariant &value, QgsProcessingContext &context, bool &ok) const |
Returns a string version of the parameter input value (if possible). | |
virtual QStringList | valueAsStringList (const QVariant &value, QgsProcessingContext &context, bool &ok) const |
Returns a string list version of the parameter input value (if possible). | |
Public Member Functions inherited from QgsFileFilterGenerator | |
virtual | ~QgsFileFilterGenerator ()=default |
Static Public Member Functions | |
static QgsProcessingParameterFile * | fromScriptCode (const QString &name, const QString &description, bool isOptional, const QString &definition, Qgis::ProcessingFileParameterBehavior behavior=Qgis::ProcessingFileParameterBehavior::File) |
Creates a new parameter using the definition from a script code. | |
static QString | typeName () |
Returns the type name for the parameter class. | |
Additional Inherited Members | |
Public Types inherited from QgsProcessingParameterDefinition | |
enum class | ValueAsStringFlag : int { AllowMapLayerValues = 1 << 0 } |
Flags for passing to the valueAsStringPrivate() method. More... | |
typedef QFlags< ValueAsStringFlag > | ValueAsStringFlags |
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. | |
QgsProcessingAlgorithm * | mAlgorithm = 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. | |
Qgis::ProcessingParameterFlags | 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. | |
An input file or folder parameter for processing algorithms.
Definition at line 1982 of file qgsprocessingparameters.h.
QgsProcessingParameterFile::QgsProcessingParameterFile | ( | const QString & | name, |
const QString & | description = QString() , |
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Qgis::ProcessingFileParameterBehavior | behavior = Qgis::ProcessingFileParameterBehavior::File , |
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const QString & | extension = QString() , |
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const QVariant & | defaultValue = QVariant() , |
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bool | optional = false , |
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const QString & | fileFilter = QString() |
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Constructor for QgsProcessingParameterFile.
The extension argument allows for specifying a file extension associated with the parameter (e.g. "html"). Use fileFilter for a more flexible approach which allows for multiple file extensions. Only one of extension or fileFilter should be specified, if both are specified then fileFilter takes precedence.
Definition at line 4002 of file qgsprocessingparameters.cpp.
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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.
Reimplemented from QgsProcessingParameterDefinition.
Definition at line 4071 of file qgsprocessingparameters.cpp.
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overridevirtual |
Returns the parameter definition encoded in a string which can be used within a Processing script.
Reimplemented from QgsProcessingParameterDefinition.
Definition at line 4061 of file qgsprocessingparameters.cpp.
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inline |
Returns the parameter behavior (e.g.
File or Folder).
Definition at line 2011 of file qgsprocessingparameters.h.
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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 4016 of file qgsprocessingparameters.cpp.
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overridevirtual |
Creates a clone of the parameter definition.
Implements QgsProcessingParameterDefinition.
Definition at line 4011 of file qgsprocessingparameters.cpp.
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overridevirtual |
This method needs to be reimplemented in all classes which implement this interface and return a file filter.
Implements QgsFileFilterGenerator.
Definition at line 4095 of file qgsprocessingparameters.cpp.
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inline |
Returns any specified file extension for the parameter.
Definition at line 2026 of file qgsprocessingparameters.h.
QString QgsProcessingParameterFile::fileFilter | ( | ) | const |
Returns the file filter string for file destinations compatible with this parameter.
Definition at line 4121 of file qgsprocessingparameters.cpp.
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static |
Creates a new parameter using the definition from a script code.
Definition at line 4150 of file qgsprocessingparameters.cpp.
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overridevirtual |
Restores this parameter to a QVariantMap.
Subclasses should ensure that they call the base class method.
Reimplemented from QgsProcessingParameterDefinition.
Definition at line 4141 of file qgsprocessingparameters.cpp.
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inline |
Sets the parameter behavior (e.g.
File or Folder).
Definition at line 2017 of file qgsprocessingparameters.h.
void QgsProcessingParameterFile::setExtension | ( | const QString & | extension | ) |
Sets a file extension for the parameter.
Calling this method resets any existing fileFilter().
Definition at line 4115 of file qgsprocessingparameters.cpp.
void QgsProcessingParameterFile::setFileFilter | ( | const QString & | filter | ) |
Sets the file filter string for file destinations compatible with this parameter.
Calling this method resets any existing extension() setting.
Definition at line 4126 of file qgsprocessingparameters.cpp.
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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.
Reimplemented from QgsProcessingParameterDefinition.
Definition at line 4132 of file qgsprocessingparameters.cpp.
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inlineoverridevirtual |
Unique parameter type name.
Implements QgsProcessingParameterDefinition.
Definition at line 2001 of file qgsprocessingparameters.h.
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inlinestatic |
Returns the type name for the parameter class.
Definition at line 1999 of file qgsprocessingparameters.h.