42 const double origWidth =
width();
44 const auto constMLayers =
mLayers;
85 const auto constLLayers =
mLayers;
102 const auto constMLayers =
mLayers;
109 if (
width > maxWidth )
119 if (
width > maxWidth )
136 const double layerWidth = lineLayer->
width( context );
137 maxWidth = std::max( maxWidth, layerWidth );
144 const double symbolWidth =
width();
146 const auto constMLayers =
mLayers;
180 const double symbolWidth =
width();
185 for ( QgsSymbolLayerList::const_iterator it =
mLayers.begin(); it !=
mLayers.end(); ++it )
199 const auto constMLayers =
mLayers;
211 if ( !layerWidthDD || layerWidthDD != symbolDD )
219 const QgsProperty scaledDD( QgsSymbolLayerUtils::scaleWholeSymbol( lineLayer->
width() / symbolWidth, symbolDD ) );
220 if ( !layerWidthDD || layerWidthDD != scaledDD )
224 const QgsProperty scaledOffsetDD( QgsSymbolLayerUtils::scaleWholeSymbol( lineLayer->
offset() / symbolWidth, symbolDD ) );
225 if ( layerOffsetDD && layerOffsetDD != scaledOffsetDD )
238 QPainter *renderPainter = context.
painter();
245 if ( layerIdx != -1 )
253 renderPolylineUsingLayer( lineLayer, points, symbolContext );
261 const auto constMLayers =
mLayers;
273 renderPolylineUsingLayer( lineLayer, points, symbolContext );
290 if ( effect && effect->
enabled() )
293 p->translate( points.boundingRect().topLeft() );
294 p.setEffect( effect );
295 layer->renderPolyline( points.translated( -points.boundingRect().topLeft() ), context );
299 layer->renderPolyline( points, context );
The Qgis class provides global constants for use throughout the application.
RenderUnit
Rendering size units.
@ Unknown
Mixed or unknown units.
double valueAsDouble(int key, const QgsExpressionContext &context, double defaultValue=0.0, bool *ok=nullptr) const
Calculates the current value of the property with the specified key and interprets it as a double.
A class to manager painter saving and restoring required for effect drawing.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
A symbol layer subclass which alters rendered feature shapes through the use of QGIS expressions.
Qgis::SymbolType symbolType() const
Access the symbol type.
QgsSymbol * subSymbol() override
Returns the symbol's sub symbol, if present.
Abstract base class for line symbol layers.
virtual void setWidth(double width)
Sets the width of the line symbol layer.
void setOffset(double offset)
Sets the line's offset.
void setWidthUnit(Qgis::RenderUnit unit)
Sets the units for the line's width.
virtual double width() const
Returns the estimated width for the line symbol layer.
double offset() const
Returns the line's offset.
A line symbol type, for rendering LineString and MultiLineString geometries.
void setWidthUnit(Qgis::RenderUnit unit) const
Sets the width units for the whole symbol (including all symbol layers).
void setDataDefinedWidth(const QgsProperty &property) const
Set data defined width for whole symbol (including all symbol layers).
QgsLineSymbol * clone() const override
Returns a deep copy of this symbol.
void setWidth(double width) const
Sets the width for the whole line symbol.
void renderPolyline(const QPolygonF &points, const QgsFeature *f, QgsRenderContext &context, int layer=-1, bool selected=false)
Renders the symbol along the line joining points, using the given render context.
double width() const
Returns the estimated width for the whole symbol, which is the maximum width of all marker symbol lay...
static QgsLineSymbol * createSimple(const QVariantMap &properties)
Create a line symbol with one symbol layer: SimpleLine with specified properties.
QgsLineSymbol(const QgsSymbolLayerList &layers=QgsSymbolLayerList())
Constructor for QgsLineSymbol, with the specified list of initial symbol layers.
QgsProperty dataDefinedWidth() const
Returns data defined width for whole symbol (including all symbol layers).
Base class for visual effects which can be applied to QPicture drawings.
bool enabled() const
Returns whether the effect is enabled.
bool hasActiveProperties() const final
Returns true if the collection has any active properties, or false if all properties within the colle...
QgsProperty property(int key) const final
Returns a matching property from the collection, if one exists.
A store for object properties.
Contains information about the context of a rendering operation.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
void setPainter(QPainter *p)
Sets the destination QPainter for the render operation.
bool isSymbolLayerEnabled(const QgsSymbolLayer *layer) const
When rendering a map layer in a second pass (for selective masking), some symbol layers may be disabl...
bool renderingStopped() const
Returns true if the rendering operation has been stopped and any ongoing rendering should be canceled...
A simple line symbol layer, which renders lines using a line in a variety of styles (e....
static QgsSymbolLayer * create(const QVariantMap &properties=QVariantMap())
Creates a new QgsSimpleLineSymbolLayer, using the settings serialized in the properties map (correspo...
Qgis::SymbolType type() const
@ StrokeWidth
Stroke width.
@ LayerEnabled
Whether symbol layer is enabled.
bool enabled() const
Returns true if symbol layer is enabled and will be drawn.
virtual void setDataDefinedProperty(Property key, const QgsProperty &property)
Sets a data defined property for the layer.
QgsPropertyCollection & dataDefinedProperties()
Returns a reference to the symbol layer's property collection, used for data defined overrides.
void setOriginalGeometryType(Qgis::GeometryType type)
Sets the geometry type for the original feature geometry being rendered.
void setGeometryPartCount(int count)
Sets the part count of current geometry.
void setGeometryPartNum(int num)
Sets the part number of current geometry.
QgsRenderContext & renderContext()
Returns a reference to the context's render context.
Abstract base class for all rendered symbols.
void renderUsingLayer(QgsSymbolLayer *layer, QgsSymbolRenderContext &context, Qgis::GeometryType geometryType=Qgis::GeometryType::Unknown, const QPolygonF *points=nullptr, const QVector< QPolygonF > *rings=nullptr)
Renders a context using a particular symbol layer without passing in a geometry.
QgsSymbolLayerList cloneLayers() const
Retrieve a cloned list of all layers that make up this symbol.
QgsSymbolRenderContext * symbolRenderContext()
Returns the symbol render context.
QgsSymbolLayer * symbolLayer(int layer)
Returns the symbol layer at the specified index.
Qgis::SymbolRenderHints renderHints() const
Returns the rendering hint flags for the symbol.
void copyCommonProperties(const QgsSymbol *other)
Copies common properties from an other symbol to this symbol.
QgsPropertyCollection & dataDefinedProperties()
Returns a reference to the symbol's property collection, used for data defined overrides.
qreal mOpacity
Symbol opacity (in the range 0 - 1)
qreal opacity() const
Returns the opacity for the symbol.
QgsSymbolLayerList mLayers
Q_DECL_DEPRECATED const QgsVectorLayer * layer() const
bool qgsDoubleNear(double a, double b, double epsilon=4 *std::numeric_limits< double >::epsilon())
Compare two doubles (but allow some difference)
QList< QgsSymbolLayer * > QgsSymbolLayerList