30#include <QDomDocument>
110 mFeaturesCategories.clear();
111 mSymbolCategories.clear();
112 mFeatureDecorations.clear();
151 exteriorRing.reserve( 5 );
152 exteriorRing << outer.topLeft();
153 exteriorRing << outer.topRight();
154 exteriorRing << outer.bottomRight();
155 exteriorRing << outer.bottomLeft();
156 exteriorRing << outer.topLeft();
158 mExtentPolygon.clear();
159 mExtentPolygon.append( exteriorRing );
176 if ( selected || drawVertexMarker )
178 mFeatureDecorations.append( FeatureDecoration( feature, selected, drawVertexMarker, layer ) );
202 catId.append(
reinterpret_cast<const char *
>( &sym ),
sizeof( sym ) );
209 catId.append(
reinterpret_cast<const char *
>( &sym ),
sizeof( sym ) );
213 if ( catId.isEmpty() )
218 if ( ! mSymbolCategories.contains( catId ) )
220 CombinedFeature cFeat;
222 cFeat.feature = feature;
223 mSymbolCategories.insert( catId, mSymbolCategories.count() );
224 mFeaturesCategories.append( cFeat );
228 CombinedFeature &cFeat = mFeaturesCategories[ mSymbolCategories[catId] ];
247 geom = geom.
buffer( 0, 0 );
260 cFeat.geometries.append( geom );
287 for (
const CombinedFeature &cit : std::as_const( mFeaturesCategories ) )
289 finalMulti.resize( 0 );
327 finalMulti.append( mExtentPolygon );
328 for (
const QgsGeometry &geom : std::as_const( cit.geometries ) )
335 multi.append( geom.asPolygon() );
339 multi = geom.asMultiPolygon();
342 for (
int i = 0; i < multi.size(); i++ )
348 if ( exterior.count() < 4 || exterior[0] != exterior[exterior.count() - 1] )
350 finalMulti[0].append( exterior );
353 for (
int j = 1; j < multi[i].size(); j++ )
356 newPoly.append( multi[i][j] );
357 finalMulti.append( newPoly );
383 if ( mFeaturesCategories.isEmpty() )
394 for ( FeatureDecoration deco : std::as_const( mFeatureDecorations ) )
396 mSubRenderer->renderFeature( deco.feature, mContext, deco.layer, deco.selected, deco.drawMarkers );
406 return QStringLiteral(
"MERGED FEATURES: NULL" );
408 return "MERGED FEATURES [" +
mSubRenderer->dump() +
']';
430 QDomElement embeddedRendererElem = element.firstChildElement( QStringLiteral(
"renderer-v2" ) );
431 if ( !embeddedRendererElem.isNull() )
444 rendererElem.setAttribute( QStringLiteral(
"type" ), QStringLiteral(
"mergedFeatureRenderer" ) );
449 rendererElem.appendChild( embeddedRendererElem );
463 return mSubRenderer->symbolForFeature( feature, context );
470 return mSubRenderer->originalSymbolForFeature( feature, context );
479 return mSubRenderer->symbolsForFeature( feature, context );
486 return mSubRenderer->originalSymbolsForFeature( feature, context );
492 return QSet<QString>();
493 return mSubRenderer->legendKeysForFeature( feature, context );
501 return mSubRenderer->legendKeyToExpression( key, layer, ok );
517 return Capabilities();
526 return QSet<QString>();
551 return mSubRenderer->willRenderFeature( feature, context );
556 if ( renderer->
type() == QLatin1String(
"mergedFeatureRenderer" ) )
561 if ( renderer->
type() == QLatin1String(
"singleSymbol" ) ||
562 renderer->
type() == QLatin1String(
"categorizedSymbol" ) ||
563 renderer->
type() == QLatin1String(
"graduatedSymbol" ) ||
564 renderer->
type() == QLatin1String(
"RuleRenderer" ) )
566 std::unique_ptr< QgsMergedFeatureRenderer > res = std::make_unique< QgsMergedFeatureRenderer >( renderer->
clone() );
568 return res.release();
570 else if ( renderer->
type() == QLatin1String(
"invertedPolygonRenderer" ) )
574 return res.release();
WkbType
The WKB type describes the number of dimensions a geometry has.
@ MultiPolygon
MultiPolygon.
@ CurvePolygon
CurvePolygon.
@ MultiSurface
MultiSurface.
void setFeature(const QgsFeature &feature)
Convenience function for setting a feature for the context.
virtual void setLegendSymbolItem(const QString &key, QgsSymbol *symbol)
Sets the symbol to be used for a legend symbol item.
virtual void stopRender(QgsRenderContext &context)
Must be called when a render cycle has finished, to allow the renderer to clean up.
void copyRendererData(QgsFeatureRenderer *destRenderer) const
Clones generic renderer data to another renderer.
@ MoreSymbolsPerFeature
May use more than one symbol to render a feature: symbolsForFeature() will return them.
static QgsFeatureRenderer * load(QDomElement &symbologyElem, const QgsReadWriteContext &context)
create a renderer from XML element
void saveRendererData(QDomDocument &doc, QDomElement &element, const QgsReadWriteContext &context)
Saves generic renderer data into the specified element.
virtual const QgsFeatureRenderer * embeddedRenderer() const
Returns the current embedded renderer (subrenderer) for this feature renderer.
virtual void startRender(QgsRenderContext &context, const QgsFields &fields)
Must be called when a new render cycle is started.
virtual QgsFeatureRenderer * clone() const =0
Create a deep copy of this renderer.
The feature class encapsulates a single feature including its unique ID, geometry and a list of field...
bool hasGeometry() const
Returns true if the feature has an associated geometry.
void setGeometry(const QgsGeometry &geometry)
Set the feature's geometry.
Container of fields for a vector layer.
A geometry is the spatial representation of a feature.
QgsGeometry difference(const QgsGeometry &geometry, const QgsGeometryParameters ¶meters=QgsGeometryParameters()) const
Returns a geometry representing the points making up this geometry that do not make up other.
Qgis::GeometryOperationResult transform(const QgsCoordinateTransform &ct, Qgis::TransformDirection direction=Qgis::TransformDirection::Forward, bool transformZ=false)
Transforms this geometry as described by the coordinate transform ct.
bool isGeosValid(Qgis::GeometryValidityFlags flags=Qgis::GeometryValidityFlags()) const
Checks validity of the geometry using GEOS.
static QgsGeometry fromPolygonXY(const QgsPolygonXY &polygon)
Creates a new geometry from a QgsPolygonXY.
QgsGeometry mergeLines() const
Merges any connected lines in a LineString/MultiLineString geometry and converts them to single line ...
static QgsGeometry fromMultiPolygonXY(const QgsMultiPolygonXY &multipoly)
Creates a new geometry from a QgsMultiPolygonXY.
QgsGeometry buffer(double distance, int segments) const
Returns a buffer region around this geometry having the given width and with a specified number of se...
static QgsGeometry unaryUnion(const QVector< QgsGeometry > &geometries, const QgsGeometryParameters ¶meters=QgsGeometryParameters())
Compute the unary union on a list of geometries.
QgsMergedFeatureRenderer is a polygon or line-only feature renderer used to renderer a set of feature...
void setLegendSymbolItem(const QString &key, QgsSymbol *symbol) override
Sets the symbol to be used for a legend symbol item.
static QgsFeatureRenderer * create(QDomElement &element, const QgsReadWriteContext &context)
Creates a renderer out of an XML, for loading.
QgsSymbol * symbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
To be overridden.
void stopRender(QgsRenderContext &context) override
The actual rendering will take place here.
QSet< QString > legendKeysForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns legend keys matching a specified feature.
QgsSymbolList symbols(QgsRenderContext &context) const override
Returns list of symbols used by the renderer.
QgsSymbolList symbolsForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns list of symbols used for rendering the feature.
void startRender(QgsRenderContext &context, const QgsFields &fields) override
Must be called when a new render cycle is started.
QString legendKeyToExpression(const QString &key, QgsVectorLayer *layer, bool &ok) const override
Attempts to convert the specified legend rule key to a QGIS expression matching the features displaye...
QgsSymbol * originalSymbolForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns symbol for feature.
QString dump() const override
Returns debug information about this renderer.
QgsMergedFeatureRenderer(QgsFeatureRenderer *embeddedRenderer)
Constructor for QgsMergedFeatureRenderer.
bool renderFeature(const QgsFeature &feature, QgsRenderContext &context, int layer=-1, bool selected=false, bool drawVertexMarker=false) override
Renders a given feature.
const QgsFeatureRenderer * embeddedRenderer() const override
Returns the current embedded renderer (subrenderer) for this feature renderer.
QgsSymbolList originalSymbolsForFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Equivalent of originalSymbolsForFeature() call extended to support renderers that may use more symbol...
bool accept(QgsStyleEntityVisitorInterface *visitor) const override
Accepts the specified symbology visitor, causing it to visit all symbols associated with the renderer...
QSet< QString > usedAttributes(const QgsRenderContext &context) const override
Returns a list of attributes required by this renderer.
QgsLegendSymbolList legendSymbolItems() const override
Returns a list of symbology items for the legend.
QDomElement save(QDomDocument &doc, const QgsReadWriteContext &context) override
Stores renderer properties to an XML element.
@ Merge
Merge features (union/dissolve)
@ InvertOnly
Invert features only (polygons only)
@ MergeAndInvert
Merge and invert features (polygons only)
GeometryOperation mOperation
Operation to apply to collected geometries.
void checkLegendSymbolItem(const QString &key, bool state=true) override
Sets whether the legend symbology item with the specified ley should be checked.
bool filterNeedsGeometry() const override
Returns true if this renderer requires the geometry to apply the filter.
bool legendSymbolItemChecked(const QString &key) override
Returns true if the legend symbology item with the specified key is checked.
void setEmbeddedRenderer(QgsFeatureRenderer *subRenderer) override
Sets an embedded renderer (subrenderer) for this feature renderer.
std::unique_ptr< QgsFeatureRenderer > mSubRenderer
Embedded renderer.
QgsFeatureRenderer::Capabilities capabilities() override
Returns details about internals of this renderer.
bool legendSymbolItemsCheckable() const override
Returns true if symbology items in legend are checkable.
bool willRenderFeature(const QgsFeature &feature, QgsRenderContext &context) const override
Returns whether the renderer will render a feature or not.
static QgsMergedFeatureRenderer * convertFromRenderer(const QgsFeatureRenderer *renderer)
Creates a QgsMergedFeatureRenderer by a conversion from an existing renderer.
QgsMergedFeatureRenderer * clone() const override
Create a deep copy of this renderer.
The class is used as a container of context for various read/write operations on other objects.
double width() const
Returns the width of the rectangle.
QRectF toRectF() const
Returns a QRectF with same coordinates as the rectangle.
double height() const
Returns the height of the rectangle.
QgsRectangle buffered(double width) const
Gets rectangle enlarged by buffer.
Contains information about the context of a rendering operation.
void setCoordinateTransform(const QgsCoordinateTransform &t)
Sets the current coordinate transform for the context.
QPainter * painter()
Returns the destination QPainter for the render operation.
QgsExpressionContext & expressionContext()
Gets the expression context.
QgsRectangle mapExtent() const
Returns the original extent of the map being rendered.
void setExtent(const QgsRectangle &extent)
When rendering a map layer, calling this method sets the "clipping" extent for the layer (in the laye...
bool renderingStopped() const
Returns true if the rendering operation has been stopped and any ongoing rendering should be canceled...
QgsCoordinateTransform coordinateTransform() const
Returns the current coordinate transform for the context.
An interface for classes which can visit style entity (e.g.
Abstract base class for all rendered symbols.
Represents a vector layer which manages a vector based data sets.
static Qgis::WkbType flatType(Qgis::WkbType type)
Returns the flat type for a WKB type.
QVector< QgsPolylineXY > QgsPolygonXY
Polygon: first item of the list is outer ring, inner rings (if any) start from second item.
QVector< QgsPointXY > QgsPolylineXY
Polyline as represented as a vector of two-dimensional points.
QVector< QgsPolygonXY > QgsMultiPolygonXY
A collection of QgsPolygons that share a common collection of attributes.
QList< QgsLegendSymbolItem > QgsLegendSymbolList
#define RENDERER_TAG_NAME
QList< QgsSymbol * > QgsSymbolList