qgssymbol.h

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/***************************************************************************
 qgssymbol.h
 ---------------------
 begin                : November 2009
 copyright            : (C) 2009 by Martin Dobias
 email                : wonder dot sk at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSSYMBOL_H
#define QGSSYMBOL_H
 
#include "qgis_core.h"
#include "qgis.h"
#include "qgspropertycollection.h"
#include "qgsrendercontext.h"
 
class QgsSymbolLayer;
class QgsLegendPatchShape;
class QgsSymbolRenderContext;
class QgsLineSymbolLayer;
 
typedef QList<QgsSymbolLayer *> QgsSymbolLayerList;
 
class CORE_EXPORT QgsSymbol
{
 
#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    switch ( sipCpp->type() )
    {
      case Qgis::SymbolType::Marker: sipType = sipType_QgsMarkerSymbol; break;
      case Qgis::SymbolType::Line: sipType = sipType_QgsLineSymbol; break;
      case Qgis::SymbolType::Fill: sipType = sipType_QgsFillSymbol; break;
      default: sipType = 0; break;
    }
    SIP_END
#endif
 
    friend class QgsFeatureRenderer;
 
  public:
 
    static QString symbolTypeToString( Qgis::SymbolType type );
 
    static Qgis::SymbolType symbolTypeForGeometryType( QgsWkbTypes::GeometryType type );
 
    enum Property
    {
      PropertyOpacity, 
    };
 
    static const QgsPropertiesDefinition &propertyDefinitions();
 
    virtual ~QgsSymbol();
 
    static QgsSymbol *defaultSymbol( QgsWkbTypes::GeometryType geomType ) SIP_FACTORY;
 
    Qgis::SymbolType type() const { return mType; }
 
    // symbol layers handling
 
    QgsSymbolLayerList symbolLayers() { return mLayers; }
 
#ifndef SIP_RUN
 
    QgsSymbolLayer *symbolLayer( int layer );
 
    const QgsSymbolLayer *symbolLayer( int layer ) const;
#else
 
    SIP_PYOBJECT symbolLayer( int layer ) SIP_TYPEHINT( QgsSymbolLayer );
    % MethodCode
    const int count = sipCpp->symbolLayerCount();
    if ( a0 < 0 || a0 >= count )
    {
      PyErr_SetString( PyExc_IndexError, QByteArray::number( a0 ) );
      sipIsErr = 1;
    }
    else
    {
      sipRes = sipConvertFromType( sipCpp->symbolLayer( a0 ), sipType_QgsSymbolLayer, NULL );
    }
    % End
#endif
 
    int symbolLayerCount() const { return mLayers.count(); }
 
#ifdef SIP_RUN
 
    int __len__() const;
    % MethodCode
    sipRes = sipCpp->symbolLayerCount();
    % End
 
    int __bool__() const;
    % MethodCode
    sipRes = true;
    % End
 
    SIP_PYOBJECT __getitem__( int index ) SIP_TYPEHINT( QgsSymbolLayer );
    % MethodCode
    const int count = sipCpp->symbolLayerCount();
    if ( a0 < -count || a0 >= count )
    {
      PyErr_SetString( PyExc_IndexError, QByteArray::number( a0 ) );
      sipIsErr = 1;
    }
    else if ( a0 >= 0 )
    {
      return sipConvertFromType( sipCpp->symbolLayer( a0 ), sipType_QgsSymbolLayer, NULL );
    }
    else
    {
      return sipConvertFromType( sipCpp->symbolLayer( count + a0 ), sipType_QgsSymbolLayer, NULL );
    }
    % End
 
    void __delitem__( int index );
    % MethodCode
    const int count = sipCpp->symbolLayerCount();
    if ( a0 >= 0 && a0 < count )
      sipCpp->deleteSymbolLayer( a0 );
    else if ( a0 < 0 && a0 >= -count )
      sipCpp->deleteSymbolLayer( count + a0 );
    else
    {
      PyErr_SetString( PyExc_IndexError, QByteArray::number( a0 ) );
      sipIsErr = 1;
    }
    % End
#endif
 
    bool insertSymbolLayer( int index, QgsSymbolLayer *layer SIP_TRANSFER );
 
    bool appendSymbolLayer( QgsSymbolLayer *layer SIP_TRANSFER );
 
    bool deleteSymbolLayer( int index );
 
    QgsSymbolLayer *takeSymbolLayer( int index ) SIP_TRANSFERBACK;
 
    bool changeSymbolLayer( int index, QgsSymbolLayer *layer SIP_TRANSFER );
 
    void startRender( QgsRenderContext &context, const QgsFields &fields = QgsFields() );
 
    void stopRender( QgsRenderContext &context );
 
    void setColor( const QColor &color );
 
    QColor color() const;
 
    void drawPreviewIcon( QPainter *painter, QSize size, QgsRenderContext *customContext = nullptr, bool selected = false, const QgsExpressionContext *expressionContext = nullptr,
                          const QgsLegendPatchShape *patchShape = nullptr );
 
    void exportImage( const QString &path, const QString &format, QSize size );
 
    QImage asImage( QSize size, QgsRenderContext *customContext = nullptr );
 
    QImage bigSymbolPreviewImage( QgsExpressionContext *expressionContext = nullptr, Qgis::SymbolPreviewFlags flags = Qgis::SymbolPreviewFlag::FlagIncludeCrosshairsForMarkerSymbols ) SIP_PYNAME( bigSymbolPreviewImageV2 );
 
    Q_DECL_DEPRECATED QImage bigSymbolPreviewImage( QgsExpressionContext *expressionContext = nullptr, int flags = static_cast< int >( Qgis::SymbolPreviewFlag::FlagIncludeCrosshairsForMarkerSymbols ) ) SIP_DEPRECATED;
 
    QString dump() const;
 
    virtual QgsSymbol *clone() const = 0 SIP_FACTORY;
 
    void toSld( QDomDocument &doc, QDomElement &element, QVariantMap props ) const;
 
    QgsUnitTypes::RenderUnit outputUnit() const;
 
    bool usesMapUnits() const;
 
    void setOutputUnit( QgsUnitTypes::RenderUnit unit );
 
    QgsMapUnitScale mapUnitScale() const;
 
    void setMapUnitScale( const QgsMapUnitScale &scale );
 
    qreal opacity() const { return mOpacity; }
 
    void setOpacity( qreal opacity ) { mOpacity = opacity; }
 
    void setRenderHints( Qgis::SymbolRenderHints hints ) { mRenderHints = hints; }
 
    Qgis::SymbolRenderHints renderHints() const { return mRenderHints; }
 
    void setFlags( Qgis::SymbolFlags flags ) { mSymbolFlags = flags; }
 
    Qgis::SymbolFlags flags() const { return mSymbolFlags; }
 
    void setClipFeaturesToExtent( bool clipFeaturesToExtent ) { mClipFeaturesToExtent = clipFeaturesToExtent; }
 
    bool clipFeaturesToExtent() const { return mClipFeaturesToExtent; }
 
    void setForceRHR( bool force ) { mForceRHR = force; }
 
    bool forceRHR() const { return mForceRHR; }
 
    QSet<QString> usedAttributes( const QgsRenderContext &context ) const;
 
    void setDataDefinedProperty( Property key, const QgsProperty &property );
 
    QgsPropertyCollection &dataDefinedProperties() { return mDataDefinedProperties; }
 
    const QgsPropertyCollection &dataDefinedProperties() const { return mDataDefinedProperties; } SIP_SKIP
 
    void setDataDefinedProperties( const QgsPropertyCollection &collection ) { mDataDefinedProperties = collection; }
 
    bool hasDataDefinedProperties() const;
 
    bool canCauseArtifactsBetweenAdjacentTiles() const;
 
    Q_DECL_DEPRECATED void setLayer( const QgsVectorLayer *layer ) SIP_DEPRECATED;
 
    Q_DECL_DEPRECATED const QgsVectorLayer *layer() const SIP_DEPRECATED;
 
    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 );
 
    QgsSymbolRenderContext *symbolRenderContext();
 
    void startFeatureRender( const QgsFeature &feature, QgsRenderContext &context, int layer = -1 );
 
    void stopFeatureRender( const QgsFeature &feature, QgsRenderContext &context, int layer = -1 );
 
  protected:
 
    QgsSymbol( Qgis::SymbolType type, const QgsSymbolLayerList &layers SIP_TRANSFER ); // can't be instantiated
 
    static inline QPointF _getPoint( QgsRenderContext &context, const QgsPoint &point )
    {
      QPointF pt;
      if ( context.coordinateTransform().isValid() )
      {
        double x = point.x();
        double y = point.y();
        double z = 0.0;
        context.coordinateTransform().transformInPlace( x, y, z );
        pt = QPointF( x, y );
 
      }
      else
        pt = point.toQPointF();
 
      context.mapToPixel().transformInPlace( pt.rx(), pt.ry() );
      return pt;
    }
 
    static QPolygonF _getLineString( QgsRenderContext &context, const QgsCurve &curve, bool clipToExtent = true );
 
    static QPolygonF _getPolygonRing( QgsRenderContext &context, const QgsCurve &curve, bool clipToExtent, bool isExteriorRing = false, bool correctRingOrientation = false );
 
    static void _getPolygon( QPolygonF &pts, QVector<QPolygonF> &holes, QgsRenderContext &context, const QgsPolygon &polygon, bool clipToExtent = true, bool correctRingOrientation = false );
 
    QgsSymbolLayerList cloneLayers() const SIP_FACTORY;
 
    void renderUsingLayer( QgsSymbolLayer *layer, QgsSymbolRenderContext &context, QgsWkbTypes::GeometryType geometryType = QgsWkbTypes::GeometryType::UnknownGeometry, const QPolygonF *points = nullptr, const QVector<QPolygonF> *rings = nullptr );
 
    void renderVertexMarker( QPointF pt, QgsRenderContext &context, Qgis::VertexMarkerType currentVertexMarkerType, double currentVertexMarkerSize );
 
    Qgis::SymbolType mType;
    QgsSymbolLayerList mLayers;
 
    qreal mOpacity = 1.0;
 
    Qgis::SymbolRenderHints mRenderHints;
 
    Qgis::SymbolFlags mSymbolFlags = Qgis::SymbolFlags();
 
    bool mClipFeaturesToExtent = true;
    bool mForceRHR = false;
 
    Q_DECL_DEPRECATED const QgsVectorLayer *mLayer = nullptr; //current vectorlayer
 
  private:
#ifdef SIP_RUN
    QgsSymbol( const QgsSymbol & );
#endif
 
    static void initPropertyDefinitions();
 
    static QgsPropertiesDefinition sPropertyDefinitions;
 
    bool mStarted = false;
 
    std::unique_ptr< QgsSymbolRenderContext > mSymbolRenderContext;
 
    QgsPropertyCollection mDataDefinedProperties;
 
    Q_DISABLE_COPY( QgsSymbol )
 
};
 
#endif