45 for ( QVariantMap::const_iterator it = customVariables.constBegin(); it != customVariables.constEnd(); ++it )
77 if ( vars.remove( name ) )
96 const QString
id = values.at( 0 ).toString();
104 return c.variablesToMap();
109 return new GetLayoutItemVariables( mLayout );
122 GetLayoutMapLayerCredits(
const QgsLayout *
c )
126 <<
QgsExpressionFunction::Parameter( QStringLiteral(
"layer_name_separator" ), true, QStringLiteral(
": " ) ), QStringLiteral(
"Layout" ) )
135 const QString
id = values.value( 0 ).toString();
137 if (
QgsLayoutItemMap *map = qobject_cast< QgsLayoutItemMap * >( mLayout->itemById(
id ) ) )
140 const QVariantList mapLayers =
c.variable( QStringLiteral(
"map_layers" ) ).toList();
142 const bool includeLayerNames = values.value( 1 ).toBool();
143 const QString layerNameSeparator = values.value( 2 ).toString();
146 for (
const QVariant &value : mapLayers )
148 if (
const QgsMapLayer *layer = qobject_cast< const QgsMapLayer * >( value.value< QObject * >() ) )
150 const QStringList credits = !layer->metadata().rights().isEmpty() ? layer->metadata().rights() : QStringList() << layer->attribution();
151 for (
const QString &credit : credits )
153 if ( credit.trimmed().isEmpty() )
156 const QString creditString = includeLayerNames ? layer->name() + layerNameSeparator + credit
159 if ( !res.contains( creditString ) )
172 return new GetLayoutMapLayerCredits( mLayout );
184 GetCurrentFormFieldValue( )
190 const QString fieldName( values.at( 0 ).toString() );
191 const QgsFeature feat( context->
variable( QStringLiteral(
"current_feature" ) ).value<QgsFeature>() );
192 if ( fieldName.isEmpty() || ! feat.isValid( ) )
196 return feat.attribute( fieldName ) ;
201 return new GetCurrentFormFieldValue( );
214 GetCurrentParentFormFieldValue( )
220 const QString fieldName( values.at( 0 ).toString() );
221 const QgsFeature feat( context->
variable( QStringLiteral(
"current_parent_feature" ) ).value<QgsFeature>() );
222 if ( fieldName.isEmpty() || ! feat.isValid( ) )
226 return feat.attribute( fieldName ) ;
231 return new GetCurrentParentFormFieldValue( );
245 GetProcessingParameterValue(
const QVariantMap ¶ms )
252 return mParams.value( values.at( 0 ).toString() );
257 return new GetProcessingParameterValue( mParams );
262 const QVariantMap mParams;
272 scope->
addFunction( QStringLiteral(
"current_value" ),
new GetCurrentFormFieldValue( ) );
274 scope->
setVariable( QStringLiteral(
"current_feature" ), formFeature,
true );
275 scope->
setVariable( QStringLiteral(
"form_mode" ), formMode,
true );
283 scope->
addFunction( QStringLiteral(
"current_parent_value" ),
new GetCurrentParentFormFieldValue( ) );
284 scope->
setVariable( QStringLiteral(
"current_parent_geometry" ), parentFormFeature.
geometry( ),
true );
285 scope->
setVariable( QStringLiteral(
"current_parent_feature" ), parentFormFeature,
true );
286 scope->
setVariable( QStringLiteral(
"parent_form_mode" ), parentFormMode,
true );
308 vars.insert( name, value );
329 if ( vars.remove( name ) )
341 const QStringList variableNames = layer->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
342 const QStringList variableValues = layer->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
345 for (
const QString &variableName : variableNames )
347 if ( varIndex >= variableValues.length() )
352 const QVariant varValue = variableValues.at( varIndex );
354 scope->
setVariable( variableName, varValue,
true );
363 const QgsVectorLayer *vLayer = qobject_cast< const QgsVectorLayer * >( layer );
378 QList<QgsExpressionContextScope *> scopes;
397 QStringList variableNames = layer->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
398 QStringList variableValues = layer->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
400 variableNames << name;
401 variableValues << value.toString();
412 QStringList variableNames;
413 QStringList variableValues;
415 QVariantMap::const_iterator it = variables.constBegin();
416 for ( ; it != variables.constEnd(); ++it )
418 variableNames << it.key();
419 variableValues << it.value().toString();
470 QVariantList layersIds;
472 const QList<QgsMapLayer *> layersInMap = mapSettings.
layers();
473 layersIds.reserve( layersInMap.count() );
474 layers.reserve( layersInMap.count() );
477 layersIds << layer->id();
490 scope->
addFunction( QStringLiteral(
"is_layer_visible" ),
new GetLayerVisibility( mapSettings.
layers(), mapSettings.
scale() ) );
509 QVariantList matchList;
513 QVariantMap matchMap;
515 matchMap.insert( QStringLiteral(
"valid" ), match.isValid() );
516 matchMap.insert( QStringLiteral(
"layer" ), QVariant::fromValue<QgsWeakMapLayerPointer>(
QgsWeakMapLayerPointer( match.layer() ) ) );
517 matchMap.insert( QStringLiteral(
"feature_id" ), match.featureId() );
518 matchMap.insert( QStringLiteral(
"vertex_index" ), match.vertexIndex() );
519 matchMap.insert( QStringLiteral(
"distance" ), match.distance() );
521 matchList.append( matchMap );
551 return scope.release();
554 const QStringList variableNames = layout->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
555 const QStringList variableValues = layout->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
559 for (
const QString &variableName : variableNames )
561 if ( varIndex >= variableValues.length() )
566 const QVariant varValue = variableValues.at( varIndex );
568 scope->setVariable( variableName, varValue );
584 QVariantList offsets;
594 scope->addFunction( QStringLiteral(
"item_variables" ),
new GetLayoutItemVariables( layout ) );
595 scope->addFunction( QStringLiteral(
"map_credits" ),
new GetLayoutMapLayerCredits( layout ) );
607 scope->setFeature( atlasFeature );
613 return scope.release();
622 QStringList variableNames = layout->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
623 QStringList variableValues = layout->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
625 variableNames << name;
626 variableValues << value.toString();
637 QStringList variableNames;
638 QStringList variableValues;
640 QVariantMap::const_iterator it = variables.constBegin();
641 for ( ; it != variables.constEnd(); ++it )
643 variableNames << it.key();
644 variableValues << it.value().toString();
697 const QStringList variableNames = item->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
698 const QStringList variableValues = item->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
701 for (
const QString &variableName : variableNames )
703 if ( varIndex >= variableValues.length() )
708 const QVariant varValue = variableValues.at( varIndex );
743 QStringList variableNames = item->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
744 QStringList variableValues = item->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
746 variableNames << name;
747 variableValues << value.toString();
758 QStringList variableNames;
759 QStringList variableValues;
761 QVariantMap::const_iterator it = variables.constBegin();
762 for ( ; it != variables.constEnd(); ++it )
764 variableNames << it.key();
765 variableValues << it.value().toString();
779 const QStringList variableNames = frame->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
780 const QStringList variableValues = frame->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
783 for (
const QString &variableName : variableNames )
785 if ( varIndex >= variableValues.length() )
790 const QVariant varValue = variableValues.at( varIndex );
804 QStringList variableNames = frame->
customProperty( QStringLiteral(
"variableNames" ) ).toStringList();
805 QStringList variableValues = frame->
customProperty( QStringLiteral(
"variableValues" ) ).toStringList();
807 variableNames << name;
808 variableValues << value.toString();
819 QStringList variableNames;
820 QStringList variableValues;
822 QVariantMap::const_iterator it = variables.constBegin();
823 for ( ; it != variables.constEnd(); ++it )
825 variableNames << it.key();
826 variableValues << it.value().toString();
847 scope->addFunction( QStringLiteral(
"parameter" ),
new GetProcessingParameterValue( parameters ) );
850 return scope.release();
855 return scope.release();
862 if ( !model->sourceFilePath().isEmpty() )
864 modelPath = model->sourceFilePath();
873 const QString modelFolder = !modelPath.isEmpty() ? QFileInfo( modelPath ).path() : QString();
880 const QVariantMap customVariables = model->variables();
881 for (
auto it = customVariables.constBegin(); it != customVariables.constEnd(); ++it )
886 return modelScope.release();
893 return scope.release();
910 return mUsesGeometry;
916 return mReferencedColumns;
928 QgsExpressionContextUtils::GetLayerVisibility::GetLayerVisibility(
const QList<QgsMapLayer *> &layers,
double scale )
930 , mLayers( _qgis_listRawToQPointer( layers ) )
933 for (
const auto &layer : mLayers )
935 if ( layer->hasScaleBasedVisibility() )
937 mScaleBasedVisibilityDetails[ layer ] = qMakePair( layer->minimumScale(), layer->maximumScale() );
942 QgsExpressionContextUtils::GetLayerVisibility::GetLayerVisibility()
948 if ( mLayers.isEmpty() )
953 bool isVisible =
false;
954 QgsMapLayer *layer = QgsExpressionUtils::getMapLayer( values.at( 0 ), parent );
955 if ( layer && mLayers.contains( layer ) )
958 if ( mScaleBasedVisibilityDetails.contains( layer ) && !
qgsDoubleNear( mScale, 0.0 ) )
960 if ( ( !
qgsDoubleNear( mScaleBasedVisibilityDetails[ layer ].first, 0.0 ) && mScale > mScaleBasedVisibilityDetails[ layer ].first ) ||
961 ( !
qgsDoubleNear( mScaleBasedVisibilityDetails[ layer ].second, 0.0 ) && mScale < mScaleBasedVisibilityDetails[ layer ].second ) )
973 GetLayerVisibility *func =
new GetLayerVisibility();
974 func->mLayers = mLayers;
975 func->mScale = mScale;
976 func->mScaleBasedVisibilityDetails = mScaleBasedVisibilityDetails;
988 CurrentVertexZValueExpressionFunction():
991 QStringLiteral(
"Meshes" ) )
1001 if ( !context->
hasVariable( QStringLiteral(
"_mesh_vertex_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1004 int vertexIndex = context->
variable( QStringLiteral(
"_mesh_vertex_index" ) ).toInt();
1006 QgsMeshLayer *layer = qobject_cast<QgsMeshLayer *>( qvariant_cast<QgsMapLayer *>( context->
variable( QStringLiteral(
"_mesh_layer" ) ) ) );
1026 CurrentVertexXValueExpressionFunction():
1029 QStringLiteral(
"Meshes" ) )
1039 if ( !context->
hasVariable( QStringLiteral(
"_mesh_vertex_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1042 int vertexIndex = context->
variable( QStringLiteral(
"_mesh_vertex_index" ) ).toInt();
1044 QgsMeshLayer *layer = qobject_cast<QgsMeshLayer *>( qvariant_cast<QgsMapLayer *>( context->
variable( QStringLiteral(
"_mesh_layer" ) ) ) );
1064 CurrentVertexYValueExpressionFunction():
1067 QStringLiteral(
"Meshes" ) )
1077 if ( !context->
hasVariable( QStringLiteral(
"_mesh_vertex_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1080 int vertexIndex = context->
variable( QStringLiteral(
"_mesh_vertex_index" ) ).toInt();
1082 QgsMeshLayer *layer = qobject_cast<QgsMeshLayer *>( qvariant_cast<QgsMapLayer *>( context->
variable( QStringLiteral(
"_mesh_layer" ) ) ) );
1102 CurrentVertexExpressionFunction():
1105 QStringLiteral(
"Meshes" ) )
1115 if ( !context->
hasVariable( QStringLiteral(
"_mesh_vertex_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1118 int vertexIndex = context->
variable( QStringLiteral(
"_mesh_vertex_index" ) ).toInt();
1120 QgsMeshLayer *layer = qobject_cast<QgsMeshLayer *>( qvariant_cast<QgsMapLayer *>( context->
variable( QStringLiteral(
"_mesh_layer" ) ) ) );
1140 CurrentVertexIndexExpressionFunction():
1143 QStringLiteral(
"Meshes" ) )
1153 if ( !context->
hasVariable( QStringLiteral(
"_mesh_vertex_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1156 return context->
variable( QStringLiteral(
"_mesh_vertex_index" ) );
1169 CurrentFaceAreaExpressionFunction():
1172 QStringLiteral(
"Meshes" ) )
1182 if ( !context->
hasVariable( QStringLiteral(
"_mesh_face_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1185 int faceIndex = context->
variable( QStringLiteral(
"_mesh_face_index" ) ).toInt();
1187 QgsMeshLayer *layer = qobject_cast<QgsMeshLayer *>( qvariant_cast<QgsMapLayer *>( context->
variable( QStringLiteral(
"_mesh_layer" ) ) ) );
1192 if ( !face.isEmpty() )
1200 return QVariant( area );
1204 return QVariant( geom.
area() );
1220 CurrentFaceIndexExpressionFunction():
1223 QStringLiteral(
"Meshes" ) )
1233 if ( !context->
hasVariable( QStringLiteral(
"_mesh_face_index" ) ) || !context->
hasVariable( QStringLiteral(
"_mesh_layer" ) ) )
1236 return context->
variable( QStringLiteral(
"_mesh_face_index" ) ).toInt();
1250 std::unique_ptr<QgsExpressionContextScope> scope = std::make_unique<QgsExpressionContextScope>();
1252 switch ( elementType )
1261 scope->addFunction(
"$vertex_as_point",
new CurrentVertexExpressionFunction );
1262 scope->addFunction(
"$vertex_x",
new CurrentVertexXValueExpressionFunction );
1263 scope->addFunction(
"$vertex_y",
new CurrentVertexYValueExpressionFunction );
1264 scope->addFunction(
"$vertex_z",
new CurrentVertexZValueExpressionFunction );
1265 scope->addFunction(
"$vertex_index",
new CurrentVertexIndexExpressionFunction );
1272 scope->addFunction(
"$face_area",
new CurrentFaceAreaExpressionFunction );
1273 scope->addFunction(
"$face_index",
new CurrentFaceIndexExpressionFunction );
1280 return scope.release();
static QString version()
Version string.
static QString releaseName()
Release name.
static int versionInt()
Version number used for comparing versions using the "Check QGIS Version" function.
static void setCustomVariables(const QVariantMap &customVariables)
Custom expression variables for this application.
static QString osName()
Returns a string name of the operating system QGIS is running on.
static QString platform()
Returns the QGIS platform name, e.g., "desktop", "server", "qgis_process" or "external" (for external...
static QVariantMap customVariables()
Custom expression variables for this application.
static QString locale()
Returns the QGIS locale.
static void setCustomVariable(const QString &name, const QVariant &value)
Set a single custom expression variable.
static QString userFullName()
Returns the user's operating system login account full display name.
static QString userLoginName()
Returns the user's operating system login account name.
QString toProj() const
Returns a Proj string representation of this CRS.
QString ellipsoidAcronym() const
Returns the ellipsoid acronym for the ellipsoid used by the CRS.
QString description() const
Returns the descriptive name of the CRS, e.g., "WGS 84" or "GDA 94 / Vicgrid94".
QString projectionAcronym() const
Returns the projection acronym for the projection used by the CRS.
QString authid() const
Returns the authority identifier for the CRS.
@ WKT_PREFERRED
Preferred format, matching the most recent WKT ISO standard. Currently an alias to WKT2_2019,...
QString toWkt(WktVariant variant=WKT1_GDAL, bool multiline=false, int indentationWidth=4) const
Returns a WKT representation of this CRS.
QgsProjOperation operation() const
Returns information about the PROJ operation associated with the coordinate reference system,...
A general purpose distance and area calculator, capable of performing ellipsoid based calculations.
double measureArea(const QgsGeometry &geometry) const
Measures the area of a geometry.
double convertAreaMeasurement(double area, QgsUnitTypes::AreaUnit toUnits) const
Takes an area measurement calculated by this QgsDistanceArea object and converts it to a different ar...
Single scope for storing variables and functions for use within a QgsExpressionContext.
void setFields(const QgsFields &fields)
Convenience function for setting a fields for the scope.
void setFeature(const QgsFeature &feature)
Convenience function for setting a feature for the scope.
void addFunction(const QString &name, QgsScopedExpressionFunction *function)
Adds a function to the scope.
void addVariable(const QgsExpressionContextScope::StaticVariable &variable)
Adds a variable into the context scope.
void setVariable(const QString &name, const QVariant &value, bool isStatic=false)
Convenience method for setting a variable in the context scope by name name and value.
static QgsExpressionContextScope * layoutItemScope(const QgsLayoutItem *item)
Creates a new scope which contains variables and functions relating to a QgsLayoutItem.
static void setLayoutMultiFrameVariable(QgsLayoutMultiFrame *frame, const QString &name, const QVariant &value)
Sets a layout multi frame context variable, with the given name and value.
static void setLayerVariable(QgsMapLayer *layer, const QString &name, const QVariant &value)
Sets a layer context variable.
static QgsExpressionContextScope * processingModelAlgorithmScope(const QgsProcessingModelAlgorithm *model, const QVariantMap ¶meters, QgsProcessingContext &context)
Creates a new scope which contains variables and functions relating to a processing model algorithm,...
static QgsExpressionContextScope * updateSymbolScope(const QgsSymbol *symbol, QgsExpressionContextScope *symbolScope=nullptr)
Updates a symbol scope related to a QgsSymbol to an expression context.
static void setProjectVariables(QgsProject *project, const QVariantMap &variables)
Sets all project context variables.
static QgsExpressionContextScope * layoutScope(const QgsLayout *layout)
Creates a new scope which contains variables and functions relating to a QgsLayout layout.
static QgsExpressionContext createFeatureBasedContext(const QgsFeature &feature, const QgsFields &fields)
Helper function for creating an expression context which contains just a feature and fields collectio...
static QgsExpressionContextScope * meshExpressionScope(QgsMesh::ElementType elementType)
Creates a new scope which contains functions relating to mesh layer element elementType.
static void removeProjectVariable(QgsProject *project, const QString &name)
Remove project context variable.
static void setLayerVariables(QgsMapLayer *layer, const QVariantMap &variables)
Sets all layer context variables.
static void setGlobalVariables(const QVariantMap &variables)
Sets all global context variables.
static void setLayoutItemVariables(QgsLayoutItem *item, const QVariantMap &variables)
Sets all layout item context variables for an item.
static void setLayoutMultiFrameVariables(QgsLayoutMultiFrame *frame, const QVariantMap &variables)
Sets all layout multiframe context variables for an frame.
static QgsExpressionContextScope * processingAlgorithmScope(const QgsProcessingAlgorithm *algorithm, const QVariantMap ¶meters, QgsProcessingContext &context)
Creates a new scope which contains variables and functions relating to a processing algorithm,...
static QgsExpressionContextScope * notificationScope(const QString &message=QString())
Creates a new scope which contains variables and functions relating to provider notifications.
static QgsExpressionContextScope * projectScope(const QgsProject *project)
Creates a new scope which contains variables and functions relating to a QGIS project.
static QgsExpressionContextScope * parentFormScope(const QgsFeature &formFeature=QgsFeature(), const QString &formMode=QString())
Creates a new scope which contains functions and variables from the current parent attribute form/tab...
static void setLayoutVariable(QgsLayout *layout, const QString &name, const QVariant &value)
Sets a layout context variable.
static QgsExpressionContextScope * formScope(const QgsFeature &formFeature=QgsFeature(), const QString &formMode=QString())
Creates a new scope which contains functions and variables from the current attribute form/table form...
static QgsExpressionContextScope * multiFrameScope(const QgsLayoutMultiFrame *frame)
Creates a new scope which contains variables and functions relating to a QgsLayoutMultiFrame.
static void setLayoutItemVariable(QgsLayoutItem *item, const QString &name, const QVariant &value)
Sets a layout item context variable, with the given name and value.
static QgsExpressionContextScope * mapToolCaptureScope(const QList< QgsPointLocator::Match > &matches)
Sets the expression context variables which are available for expressions triggered by a map tool cap...
static QgsExpressionContextScope * atlasScope(const QgsLayoutAtlas *atlas)
Creates a new scope which contains variables and functions relating to a QgsLayoutAtlas.
static void registerContextFunctions()
Registers all known core functions provided by QgsExpressionContextScope objects.
static void setLayoutVariables(QgsLayout *layout, const QVariantMap &variables)
Sets all layout context variables.
static QgsExpressionContextScope * mapSettingsScope(const QgsMapSettings &mapSettings)
Creates a new scope which contains variables and functions relating to a QgsMapSettings object.
static void removeGlobalVariable(const QString &name)
Remove a global context variable.
static void setGlobalVariable(const QString &name, const QVariant &value)
Sets a global context variable.
static QList< QgsExpressionContextScope * > globalProjectLayerScopes(const QgsMapLayer *layer)
Creates a list of three scopes: global, layer's project and layer.
static void setProjectVariable(QgsProject *project, const QString &name, const QVariant &value)
Sets a project context variable.
static QgsExpressionContextScope * layerScope(const QgsMapLayer *layer)
Creates a new scope which contains variables and functions relating to a QgsMapLayer.
static QgsExpressionContextScope * globalScope()
Creates a new scope which contains variables and functions relating to the global QGIS context.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
static const QString EXPR_SYMBOL_COLOR
Inbuilt variable name for symbol color variable.
bool hasVariable(const QString &name) const
Check whether a variable is specified by any scope within the context.
static const QString EXPR_SYMBOL_ANGLE
Inbuilt variable name for symbol angle variable.
QVariant variable(const QString &name) const
Fetches a matching variable from the context.
A abstract base class for defining QgsExpression functions.
static bool allParamsStatic(const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context)
This will return true if all the params for the provided function node are static within the constrai...
An expression node for expression functions.
Class for parsing and evaluation of expressions (formerly called "search strings").
static bool registerFunction(QgsExpressionFunction *function, bool transferOwnership=false)
Registers a function to the expression engine.
QgsUnitTypes::AreaUnit areaUnits() const
Returns the desired areal units for calculations involving geomCalculator(), e.g.,...
QgsDistanceArea * geomCalculator()
Returns calculator used for distance and area calculations (used by $length, $area and $perimeter fun...
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
bool isValid() const
Returns the validity of this feature.
Container of fields for a vector layer.
A geometry is the spatial representation of a feature.
static QgsGeometry fromRect(const QgsRectangle &rect) SIP_HOLDGIL
Creates a new geometry from a QgsRectangle.
static QgsGeometry fromPointXY(const QgsPointXY &point) SIP_HOLDGIL
Creates a new geometry from a QgsPointXY object.
double area() const
Returns the planar, 2-dimensional area of the geometry.
Class used to render QgsLayout as an atlas, by iterating over the features from an associated vector ...
QString nameForPage(int page) const
Returns the calculated name for a specified atlas page number.
QgsVectorLayer * coverageLayer() const
Returns the coverage layer used for the atlas features.
QgsLayout * layout() override
Returns the layout associated with the iterator.
bool enabled() const
Returns whether the atlas generation is enabled.
QString currentFilename() const
Returns the current feature filename.
int count() const override
Returns the number of features to iterate over.
int currentFeatureNumber() const
Returns the current feature number, where a value of 0 corresponds to the first feature.
Layout graphical items for displaying a map.
Item representing the paper in a layout.
Base class for graphical items within a QgsLayout.
QgsLayoutSize sizeWithUnits() const
Returns the item's current size, including units.
int page() const
Returns the page the item is currently on, with the first page returning 0.
QgsExpressionContext createExpressionContext() const override
This method needs to be reimplemented in all classes which implement this interface and return an exp...
virtual QString uuid() const
Returns the item identification string.
QString id() const
Returns the item's ID name.
Abstract base class for layout items with the ability to distribute the content to several frames (Qg...
QVariant customProperty(const QString &key, const QVariant &defaultValue=QVariant()) const
Read a custom property from the object.
const QgsLayout * layout() const
Returns the layout the object is attached to.
void setCustomProperty(const QString &key, const QVariant &value)
Set a custom property for the object.
QPointF pagePositionToLayoutPosition(int page, const QgsLayoutPoint &position) const
Converts a position on a page to an absolute position in layout coordinates.
int pageCount() const
Returns the number of pages in the collection.
QgsLayoutItemPage * page(int pageNumber)
Returns a specific page (by pageNumber) from the collection.
This class provides a method of storing points, consisting of an x and y coordinate,...
double dpi() const
Returns the dpi for outputting the layout.
QgsFeature feature() const
Returns the current feature for evaluating the layout.
QgsVectorLayer * layer() const
Returns the vector layer associated with the layout's context.
QSizeF toQSizeF() const
Converts the layout size to a QSizeF.
Base class for layouts, which can contain items such as maps, labels, scalebars, etc.
void setCustomProperty(const QString &key, const QVariant &value)
Set a custom property for the layout.
QgsLayoutRenderContext & renderContext()
Returns a reference to the layout's render context, which stores information relating to the current ...
QgsLayoutPageCollection * pageCollection()
Returns a pointer to the layout's page collection, which stores and manages page items in the layout.
QVariant customProperty(const QString &key, const QVariant &defaultValue=QVariant()) const
Read a custom property from the layout.
QgsLayoutReportContext & reportContext()
Returns a reference to the layout's report context, which stores information relating to the current ...
Base class for all map layer types.
Q_INVOKABLE QVariant customProperty(const QString &value, const QVariant &defaultValue=QVariant()) const
Read a custom property from layer.
QgsCoordinateReferenceSystem crs
QString id() const
Returns the layer's unique ID, which is used to access this layer from QgsProject.
Q_INVOKABLE void setCustomProperty(const QString &key, const QVariant &value)
Set a custom property for layer.
The QgsMapSettings class contains configuration for rendering of the map.
double scale() const
Returns the calculated map scale.
QgsUnitTypes::DistanceUnit mapUnits() const
Returns the units of the map's geographical coordinates - used for scale calculation.
QgsRectangle visibleExtent() const
Returns the actual extent derived from requested extent that takes output image size into account.
QList< QgsMapLayer * > layers() const
Returns the list of layers which will be rendered in the map.
double rotation() const
Returns the rotation of the resulting map image, in degrees clockwise.
QgsCoordinateReferenceSystem destinationCrs() const
Returns the destination coordinate reference system for the map render.
A marker symbol type, for rendering Point and MultiPoint geometries.
double angle() const
Returns the marker angle for the whole symbol.
Interface for master layout type objects, such as print layouts and reports.
Represents a mesh layer supporting display of data on structured or unstructured meshes.
QgsMesh * nativeMesh()
Returns native mesh (nullptr before rendering or calling to updateMesh)
Point geometry type, with support for z-dimension and m-values.
bool isEmpty() const override SIP_HOLDGIL
Returns true if the geometry is empty.
Abstract base class for processing algorithms.
QString id() const
Returns the unique ID for the algorithm, which is a combination of the algorithm provider's ID and th...
Contains information about the context in which a processing algorithm is executed.
QgsProject * project() const
Returns the project in which the algorithm is being executed.
QString description() const
Description.
Encapsulates a QGIS project, including sets of map layers and their styles, layouts,...
static QgsProject * instance()
Returns the QgsProject singleton instance.
QgsExpressionContextScope * createExpressionContextScope() const override
This method needs to be reimplemented in all classes which implement this interface and return an exp...
QString absoluteFilePath() const
Returns full absolute path to the project file if the project is stored in a file system - derived fr...
QVariantMap customVariables() const
A map of custom project variables.
void setCustomVariables(const QVariantMap &customVariables)
A map of custom project variables.
QgsProjectStorage * projectStorage() const
Returns pointer to project storage implementation that handles read/write of the project file.
double height() const SIP_HOLDGIL
Returns the height of the rectangle.
double width() const SIP_HOLDGIL
Returns the width of the rectangle.
QgsPointXY center() const SIP_HOLDGIL
Returns the center point of the rectangle.
Expression function for use within a QgsExpressionContextScope.
QSet< QString > referencedColumns(const QgsExpressionNodeFunction *node) const override
Returns a set of field names which are required for this function.
bool isStatic(const QgsExpressionNodeFunction *node, QgsExpression *parent, const QgsExpressionContext *context) const override
Will be called during prepare to determine if the function is static.
bool usesGeometry(const QgsExpressionNodeFunction *node) const override
Does this function use a geometry object.
QVariant func(const QVariantList &values, const QgsExpressionContext *context, QgsExpression *parent, const QgsExpressionNodeFunction *node) override=0
Returns result of evaluating the function.
virtual QgsScopedExpressionFunction * clone() const =0
Returns a clone of the function.
Abstract base class for all rendered symbols.
QColor color() const
Returns the symbol's color.
const QgsDateTimeRange & temporalRange() const
Returns the datetime range for the object.
bool isTemporal() const
Returns true if the object's temporal range is enabled, and the object will be filtered when renderin...
static Q_INVOKABLE QString toString(QgsUnitTypes::DistanceUnit unit)
Returns a translated string representing a distance unit.
Represents a vector layer which manages a vector based data sets.
QgsFields fields() const FINAL
Returns the list of fields of this layer.
double ANALYSIS_EXPORT angle(QgsPoint *p1, QgsPoint *p2, QgsPoint *p3, QgsPoint *p4)
Calculates the angle between two segments (in 2 dimension, z-values are ignored)
CORE_EXPORT QgsGeometry toGeometry(const QgsMeshFace &face, const QVector< QgsMeshVertex > &vertices)
Returns face as polygon geometry.
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into allowing algorithms to be written in pure substantial changes are required in order to port existing x Processing algorithms for QGIS x The most significant changes are outlined not GeoAlgorithm For algorithms which operate on features one by consider subclassing the QgsProcessingFeatureBasedAlgorithm class This class allows much of the boilerplate code for looping over features from a vector layer to be bypassed and instead requires implementation of a processFeature method Ensure that your algorithm(or algorithm 's parent class) implements the new pure virtual createInstance(self) call
As part of the API refactoring and improvements which landed in the Processing API was substantially reworked from the x version This was done in order to allow much of the underlying Processing framework to be ported into c
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
QPointer< QgsMapLayer > QgsWeakMapLayerPointer
Weak pointer for QgsMapLayer.
QVector< int > QgsMeshFace
List of vertex indexes.
Single variable definition for use within a QgsExpressionContextScope.
int vertexCount() const
Returns number of vertices.
QVector< QgsMeshVertex > vertices
QgsMeshFace face(int index) const
Returns a face at the index.
int faceCount() const
Returns number of faces.
ElementType
Defines type of mesh elements.
QgsMeshVertex vertex(int index) const
Returns a vertex at the index.