An input file or folder parameter for processing algorithms. More...

#include <qgsprocessingparameters.h>

Inheritance diagram for QgsProcessingParameterFile:

Public Types
enum	Behavior { File = 0, Folder }
	Parameter behavior. More...

Public Types inherited from QgsProcessingParameterDefinition
enum	Flag { FlagAdvanced = 1 << 1, FlagHidden = 1 << 2, FlagOptional = 1 << 3, FlagIsModelOutput = 1 << 4 }
	Parameter flags. More...

Public Member Functions
	QgsProcessingParameterFile (const QString &name, const QString &description=QString(), Behavior behavior=File, const QString &extension=QString(), const QVariant &defaultValue=QVariant(), bool optional=false)
	Constructor for QgsProcessingParameterFile. More...

QString	asScriptCode () const override
	Returns the parameter definition encoded in a string which can be used within a Python processing script. More...

Behavior	behavior () const
	Returns the parameter behavior (e.g. More...

bool	checkValueIsAcceptable (const QVariant &input, QgsProcessingContext *context=nullptr) const override
	Checks whether the specified input value is acceptable for the parameter. More...

QgsProcessingParameterDefinition *	clone () const override
	Creates a clone of the parameter definition. More...

QString	extension () const
	Returns any specified file extension for the parameter. More...

bool	fromVariantMap (const QVariantMap &map) override
	Restores this parameter to a QVariantMap. More...

void	setBehavior (Behavior behavior)
	Sets the parameter behavior (e.g. More...

void	setExtension (const QString &extension)
	Sets a file extension for the parameter. More...

QVariantMap	toVariantMap () const override
	Saves this parameter to a QVariantMap. More...

QString	type () const override
	Unique parameter type name. 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

QgsProcessingAlgorithm *	algorithm () const
	Returns a pointer to the algorithm which owns this parameter. 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...

QgsProcessingProvider *	provider () 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...

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. More...

Static Public Member Functions
static QgsProcessingParameterFile *	fromScriptCode (const QString &name, const QString &description, bool isOptional, const QString &definition, Behavior behavior=File)
	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
Protected Attributes inherited from QgsProcessingParameterDefinition
QgsProcessingAlgorithm *	mAlgorithm = 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 customize their appearance and behavior. More...

QString	mName
	Parameter name. More...

QgsPropertyDefinition	mPropertyDefinition
	Data defined property definition. More...

Detailed Description

An input file or folder parameter for processing algorithms.

Since: QGIS 3.0

Definition at line 1140 of file qgsprocessingparameters.h.

Member Enumeration Documentation

enum QgsProcessingParameterFile::Behavior

Parameter behavior.

Enumerator
File	Parameter is a single file.
Folder	Parameter is a folder.

Definition at line 1145 of file qgsprocessingparameters.h.

Constructor & Destructor Documentation

QgsProcessingParameterFile::QgsProcessingParameterFile	(	const QString &	name,
		const QString &	description = `QString()`,
		Behavior	behavior = `File`,
		const QString &	extension = `QString()`,
		const QVariant &	defaultValue = `QVariant()`,
		bool	optional = `false`
	)

Constructor for QgsProcessingParameterFile.

Definition at line 2054 of file qgsprocessingparameters.cpp.

Member Function Documentation

QString QgsProcessingParameterFile::asScriptCode ( ) const

overridevirtual

Returns the parameter definition encoded in a string which can be used within a Python processing script.

Reimplemented from QgsProcessingParameterDefinition.

Definition at line 2097 of file qgsprocessingparameters.cpp.

Behavior QgsProcessingParameterFile::behavior ( ) const

inline

Returns the parameter behavior (e.g.

File or Folder).

See also: setBehavior()

Definition at line 1170 of file qgsprocessingparameters.h.

bool QgsProcessingParameterFile::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 2067 of file qgsprocessingparameters.cpp.

QgsProcessingParameterDefinition * QgsProcessingParameterFile::clone ( ) const

overridevirtual

Creates a clone of the parameter definition.

Implements QgsProcessingParameterDefinition.

Definition at line 2062 of file qgsprocessingparameters.cpp.

QString QgsProcessingParameterFile::extension ( ) const

inline

Returns any specified file extension for the parameter.

See also: setExtension()

Definition at line 1182 of file qgsprocessingparameters.h.

QgsProcessingParameterFile * QgsProcessingParameterFile::fromScriptCode	(	const QString &	name,
		const QString &	description,
		bool	isOptional,
		const QString &	definition,
		QgsProcessingParameterFile::Behavior	behavior = `File`
	)