31 QString expression =
properties.value( QStringLiteral(
"geometryModifier" ) ).toString();
32 if ( expression.isEmpty() )
34 expression = QStringLiteral(
"$geometry" );
38 if (
properties.value( QStringLiteral(
"SymbolType" ) ) == QLatin1String(
"Marker" ) )
42 else if (
properties.value( QStringLiteral(
"SymbolType" ) ) == QLatin1String(
"Line" ) )
57QgsGeometryGeneratorSymbolLayer::QgsGeometryGeneratorSymbolLayer(
const QString &expression )
60 , mSymbolType(
Qgis::SymbolType::Marker )
67 return QStringLiteral(
"GeometryGenerator" );
76 mSymbol = mFillSymbol.get();
82 mSymbol = mLineSymbol.get();
88 mSymbol = mMarkerSymbol.get();
114 mRenderingFeature =
true;
115 mHasRenderedFeature =
false;
120 mRenderingFeature =
false;
126 return mFillSymbol->usesMapUnits();
127 else if ( mLineSymbol )
128 return mLineSymbol->usesMapUnits();
129 else if ( mMarkerSymbol )
130 return mMarkerSymbol->usesMapUnits();
137 return mFillSymbol->color();
138 else if ( mLineSymbol )
139 return mLineSymbol->color();
140 else if ( mMarkerSymbol )
141 return mMarkerSymbol->color();
148 return mFillSymbol->outputUnit();
149 else if ( mLineSymbol )
150 return mLineSymbol->outputUnit();
151 else if ( mMarkerSymbol )
152 return mMarkerSymbol->outputUnit();
159 mFillSymbol->setOutputUnit( unit );
160 else if ( mLineSymbol )
161 mLineSymbol->setOutputUnit( unit );
162 else if ( mMarkerSymbol )
163 mMarkerSymbol->setOutputUnit( unit );
169 return mFillSymbol->mapUnitScale();
170 else if ( mLineSymbol )
171 return mLineSymbol->mapUnitScale();
172 else if ( mMarkerSymbol )
173 return mMarkerSymbol->mapUnitScale();
182 clone->mFillSymbol.reset( mFillSymbol->clone() );
184 clone->mLineSymbol.reset( mLineSymbol->clone() );
186 clone->mMarkerSymbol.reset( mMarkerSymbol->clone() );
188 clone->setSymbolType( mSymbolType );
189 clone->setUnits( mUnits );
200 props.insert( QStringLiteral(
"geometryModifier" ), mExpression->expression() );
201 switch ( mSymbolType )
204 props.insert( QStringLiteral(
"SymbolType" ), QStringLiteral(
"Marker" ) );
207 props.insert( QStringLiteral(
"SymbolType" ), QStringLiteral(
"Line" ) );
210 props.insert( QStringLiteral(
"SymbolType" ), QStringLiteral(
"Fill" ) );
229 if ( patchShapeGeometry.
isEmpty() )
245 originalSymbolType = mSymbol->
type();
274 return mExpression->expression();
279 switch ( symbol->
type() )
306 + mExpression->referencedColumns();
328 const QTransform painterToTargetUnits = QTransform::fromScale( scale, scale );
329 drawGeometry.transform( painterToTargetUnits );
340 geom.
transform( painterToTargetUnits.inverted( ) );
347 switch ( mSymbolType )
353 if ( !geoms.empty() )
354 return geoms.at( 0 );
361 if ( !geoms.empty() )
362 return geoms.at( 0 );
369 if ( !geoms.empty() )
370 return geoms.at( 0 );
381 if ( mRenderingFeature && mHasRenderedFeature )
396 switch ( geometryType )
400 Q_ASSERT( points->size() == 1 );
414 std::unique_ptr< QgsPolygon > polygon = std::make_unique< QgsPolygon >();
415 polygon->setExteriorRing( exterior.release() );
418 for (
const QPolygonF &ring : *rings )
423 drawGeometry =
QgsGeometry( std::move( polygon ) );
439 result.
transform( mapToPixel.inverted() );
447 QgsDebugMsg( QStringLiteral(
"Could no transform generated geometry to layer CRS" ) );
482 result.
transform( mapToPixel.inverted() );
490 QgsDebugMsg( QStringLiteral(
"Could no transform generated geometry to layer CRS" ) );
509 if ( mRenderingFeature )
510 mHasRenderedFeature =
true;
The Qgis class provides global constants for use throughout the application.
@ RenderingSubSymbol
Set whenever a sub-symbol of a parent symbol is currently being rendered. Can be used during symbol a...
Custom exception class for Coordinate Reference System related exceptions.
RAII class to pop scope from an expression context on destruction.
Single scope for storing variables and functions for use within a QgsExpressionContext.
void setGeometry(const QgsGeometry &geometry)
Convenience function for setting a geometry for the scope.
Expression contexts are used to encapsulate the parameters around which a QgsExpression should be eva...
QgsFeature feature() const
Convenience function for retrieving the feature for the context, if set.
Class for parsing and evaluation of expressions (formerly called "search strings").
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
void setGeometry(const QgsGeometry &geometry)
Set the feature's geometry.
A fill symbol type, for rendering Polygon and MultiPolygon geometries.
static QgsFillSymbol * createSimple(const QVariantMap &properties)
Create a fill symbol with one symbol layer: SimpleFill with specified properties.
bool usesMapUnits() const override
Returns true if the symbol layer has any components which use map unit based sizes.
QgsMapUnitScale mapUnitScale() const override
void render(QgsSymbolRenderContext &context, QgsWkbTypes::GeometryType geometryType=QgsWkbTypes::GeometryType::UnknownGeometry, const QPolygonF *points=nullptr, const QVector< QPolygonF > *rings=nullptr)
Will render this symbol layer using the context.
void drawPreviewIcon(QgsSymbolRenderContext &context, QSize size) override
QString geometryExpression() const
Gets the expression to generate this geometry.
bool hasDataDefinedProperties() const override
Returns true if the symbol layer (or any of its sub-symbols) contains data defined properties.
void setGeometryExpression(const QString &exp)
Set the expression to generate this geometry.
void setSymbolType(Qgis::SymbolType symbolType)
Set the type of symbol which should be created.
QString layerType() const override
Returns a string that represents this layer type.
bool setSubSymbol(QgsSymbol *symbol) override
Sets layer's subsymbol. takes ownership of the passed symbol.
bool isCompatibleWithSymbol(QgsSymbol *symbol) const override
Will always return true.
Qgis::SymbolType symbolType() const
Access the symbol type.
QVariantMap properties() const override
Should be reimplemented by subclasses to return a string map that contains the configuration informat...
void startRender(QgsSymbolRenderContext &context) override
Called before a set of rendering operations commences on the supplied render context.
QgsSymbol * subSymbol() override
Returns the symbol's sub symbol, if present.
void setUnits(QgsUnitTypes::RenderUnit units)
Sets the units for the geometry expression.
QSet< QString > usedAttributes(const QgsRenderContext &context) const override
Returns the set of attributes referenced by the layer.
void setColor(const QColor &color) override
Sets the "representative" color for the symbol layer.
QgsUnitTypes::RenderUnit outputUnit() const override
Returns the units to use for sizes and widths within the symbol layer.
~QgsGeometryGeneratorSymbolLayer() override
static QgsSymbolLayer * create(const QVariantMap &properties)
Creates the symbol layer.
void setOutputUnit(QgsUnitTypes::RenderUnit unit) override
Sets the units to use for sizes and widths within the symbol layer.
void stopFeatureRender(const QgsFeature &feature, QgsRenderContext &context) override
Called after the layer has been rendered for a particular feature.
QgsSymbolLayer * clone() const override
Shall be reimplemented by subclasses to create a deep copy of the instance.
void stopRender(QgsSymbolRenderContext &context) override
Called after a set of rendering operations has finished on the supplied render context.
QColor color() const override
Returns the "representative" color of the symbol layer.
void startFeatureRender(const QgsFeature &feature, QgsRenderContext &context) override
Called before the layer will be rendered for a particular feature.
A geometry is the spatial representation of a feature.
QVector< QgsGeometry > coerceToType(QgsWkbTypes::Type type, double defaultZ=0, double defaultM=0) const
Attempts to coerce this geometry into the specified destination type.
Qgis::GeometryOperationResult transform(const QgsCoordinateTransform &ct, Qgis::TransformDirection direction=Qgis::TransformDirection::Forward, bool transformZ=false) SIP_THROW(QgsCsException)
Transforms this geometry as described by the coordinate transform ct.
static QgsGeometry fromPointXY(const QgsPointXY &point) SIP_HOLDGIL
Creates a new geometry from a QgsPointXY object.
QgsWkbTypes::GeometryType type
bool isEmpty() const
Returns true if the geometry is empty (eg a linestring with no vertices, or a collection with no geom...
Represents a patch shape for use in map legends.
QgsGeometry scaledGeometry(QSizeF size) const
Returns the patch shape's geometry, scaled to the given size.
bool isNull() const
Returns true if the patch shape is a null QgsLegendPatchShape, which indicates that the default legen...
void setScaleToOutputSize(bool scale)
Sets whether the patch shape should by resized to the desired target size when rendering.
static QgsLineString * fromQPolygonF(const QPolygonF &polygon)
Returns a new linestring from a QPolygonF polygon input.
A line symbol type, for rendering LineString and MultiLineString geometries.
static QgsLineSymbol * createSimple(const QVariantMap &properties)
Create a line symbol with one symbol layer: SimpleLine with specified properties.
QgsPointXY transform(const QgsPointXY &p) const
Transforms a point p from map (world) coordinates to device coordinates.
Struct for storing maximum and minimum scales for measurements in map units.
A marker symbol type, for rendering Point and MultiPoint geometries.
static QgsMarkerSymbol * createSimple(const QVariantMap &properties)
Create a marker symbol with one symbol layer: SimpleMarker with specified properties.
Contains information about the context of a rendering operation.
QPainter * painter()
Returns the destination QPainter for the render operation.
double convertToPainterUnits(double size, QgsUnitTypes::RenderUnit unit, const QgsMapUnitScale &scale=QgsMapUnitScale(), Qgis::RenderSubcomponentProperty property=Qgis::RenderSubcomponentProperty::Generic) const
Converts a size from the specified units to painter units (pixels).
QgsExpressionContext & expressionContext()
Gets the expression context.
void setFlag(Qgis::RenderContextFlag flag, bool on=true)
Enable or disable a particular flag (other flags are not affected)
const QgsMapToPixel & mapToPixel() const
Returns the context's map to pixel transform, which transforms between map coordinates and device coo...
QgsCoordinateTransform coordinateTransform() const
Returns the current coordinate transform for the context.
Qgis::RenderContextFlags flags() const
Returns combination of flags used for rendering.
QgsLegendPatchShape defaultPatch(Qgis::SymbolType type, QSizeF size) const
Returns the default legend patch shape for the given symbol type.
static QgsStyle * defaultStyle()
Returns default application-wide style.
virtual QSet< QString > usedAttributes(const QgsRenderContext &context) const
Returns the set of attributes referenced by the layer.
void copyDataDefinedProperties(QgsSymbolLayer *destLayer) const
Copies all data defined properties of this layer to another symbol layer.
void restoreOldDataDefinedProperties(const QVariantMap &stringMap)
Restores older data defined properties from string map.
void copyPaintEffect(QgsSymbolLayer *destLayer) const
Copies paint effect of this layer to another symbol layer.
const QgsFeature * feature() const
Returns the current feature being rendered.
bool selected() const
Returns true if symbols should be rendered using the selected symbol coloring and style.
QgsWkbTypes::GeometryType originalGeometryType() const
Returns the geometry type for the original feature geometry being rendered.
QgsExpressionContextScope * expressionContextScope()
This scope is always available when a symbol of this type is being rendered.
const QgsLegendPatchShape * patchShape() const
Returns the symbol patch shape, to use if rendering symbol preview icons.
QgsRenderContext & renderContext()
Returns a reference to the context's render context.
Abstract base class for all rendered symbols.
QgsSymbolRenderContext * symbolRenderContext()
Returns the symbol render context.
void stopRender(QgsRenderContext &context)
Ends the rendering process.
void drawPreviewIcon(QPainter *painter, QSize size, QgsRenderContext *customContext=nullptr, bool selected=false, const QgsExpressionContext *expressionContext=nullptr, const QgsLegendPatchShape *patchShape=nullptr)
Draws an icon of the symbol that occupies an area given by size using the specified painter.
void setColor(const QColor &color) const
Sets the color for the symbol.
QSet< QString > usedAttributes(const QgsRenderContext &context) const
Returns a list of attributes required to render this feature.
void renderFeature(const QgsFeature &feature, QgsRenderContext &context, int layer=-1, bool selected=false, bool drawVertexMarker=false, Qgis::VertexMarkerType currentVertexMarkerType=Qgis::VertexMarkerType::SemiTransparentCircle, double currentVertexMarkerSize=0.0) SIP_THROW(QgsCsException)
Render a feature.
Qgis::SymbolType type() const
Returns the symbol's type.
void startRender(QgsRenderContext &context, const QgsFields &fields=QgsFields())
Begins the rendering process for the symbol.
static Q_INVOKABLE QString encodeUnit(QgsUnitTypes::DistanceUnit unit)
Encodes a distance unit to a string.
static Q_INVOKABLE QgsUnitTypes::RenderUnit decodeRenderUnit(const QString &string, bool *ok=nullptr)
Decodes a render unit from a string.
RenderUnit
Rendering size units.
@ RenderUnknownUnit
Mixed or unknown units.
@ RenderMetersInMapUnits
Meters value as Map units.
@ RenderPercentage
Percentage of another measurement (e.g., canvas size, feature size)
@ RenderPoints
Points (e.g., for font sizes)
@ RenderMillimeters
Millimeters.
@ RenderMapUnits
Map units.
GeometryType
The geometry types are used to group QgsWkbTypes::Type in a coarse way.