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 <QList>
#include <QMap>
#include "qgsmapunitscale.h"
#include "qgsfields.h"
#include "qgsrendercontext.h"
#include "qgsproperty.h"
#include "qgssymbollayerreference.h"
 
class QColor;
class QImage;
class QPainter;
class QSize;
class QPointF;
class QPolygonF;
class QDomDocument;
class QDomElement;
 
class QgsFields;
class QgsSymbolLayer;
class QgsRenderContext;
class QgsVectorLayer;
class QgsPaintEffect;
class QgsMarkerSymbolLayer;
class QgsLineSymbolLayer;
class QgsFillSymbolLayer;
class QgsSymbolRenderContext;
class QgsFeature;
class QgsFeatureRenderer;
class QgsCurve;
class QgsPolygon;
class QgsExpressionContext;
class QgsPoint;
class QgsLegendPatchShape;
 
typedef QList<QgsSymbolLayer *> QgsSymbolLayerList;
 
class CORE_EXPORT QgsSymbol
{
 
#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    switch ( sipCpp->type() )
    {
      case QgsSymbol::Marker: sipType = sipType_QgsMarkerSymbol; break;
      case QgsSymbol::Line: sipType = sipType_QgsLineSymbol; break;
      case QgsSymbol::Fill: sipType = sipType_QgsFillSymbol; break;
      default: sipType = 0; break;
    }
    SIP_END
#endif
 
    friend class QgsFeatureRenderer;
 
  public:
 
    enum SymbolType
    {
      Marker, 
      Line,   
      Fill,   
      Hybrid  
    };
 
    enum ScaleMethod
    {
      ScaleArea,     
      ScaleDiameter  
    };
 
 
    enum RenderHint
    {
      DynamicRotation = 2, 
    };
    Q_DECLARE_FLAGS( RenderHints, RenderHint )
 
    virtual ~QgsSymbol();
 
    static QgsSymbol *defaultSymbol( QgsWkbTypes::GeometryType geomType ) SIP_FACTORY;
 
    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 );
 
    enum PreviewFlag
    {
      FlagIncludeCrosshairsForMarkerSymbols = 1 << 0, 
    };
    Q_DECLARE_FLAGS( PreviewFlags, PreviewFlag )
 
    
    QImage bigSymbolPreviewImage( QgsExpressionContext *expressionContext = nullptr, QgsSymbol::PreviewFlags flags = QgsSymbol::FlagIncludeCrosshairsForMarkerSymbols );
 
    QString dump() const;
 
    virtual QgsSymbol *clone() const = 0 SIP_FACTORY;
 
    void toSld( QDomDocument &doc, QDomElement &element, QgsStringMap props ) const;
 
    QgsUnitTypes::RenderUnit outputUnit() 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( RenderHints hints ) { mRenderHints = hints; }
 
    RenderHints renderHints() const { return mRenderHints; }
 
    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;
 
    bool hasDataDefinedProperties() 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, int currentVertexMarkerType = 0, double currentVertexMarkerSize = 0.0 ) SIP_THROW( QgsCsException );
 
    QgsSymbolRenderContext *symbolRenderContext();
 
  protected:
    QgsSymbol( 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 );
 
    void renderVertexMarker( QPointF pt, QgsRenderContext &context, int currentVertexMarkerType, double currentVertexMarkerSize );
 
    SymbolType mType;
    QgsSymbolLayerList mLayers;
 
    qreal mOpacity = 1.0;
 
    RenderHints mRenderHints;
    bool mClipFeaturesToExtent = true;
    bool mForceRHR = false;
 
    Q_DECL_DEPRECATED const QgsVectorLayer *mLayer = nullptr; //current vectorlayer
 
  private:
#ifdef SIP_RUN
    QgsSymbol( const QgsSymbol & );
#endif
 
    bool mStarted = false;
 
    std::unique_ptr< QgsSymbolRenderContext > mSymbolRenderContext;
 
    void startFeatureRender( const QgsFeature &feature, QgsRenderContext &context, int layer = -1 );
 
    void stopFeatureRender( const QgsFeature &feature, QgsRenderContext &context, int layer = -1 );
 
    Q_DISABLE_COPY( QgsSymbol )
 
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QgsSymbol::RenderHints )
 
 
class CORE_EXPORT QgsSymbolRenderContext
{
  public:
 
    //TODO QGIS 4.0 - remove mapUnitScale and renderunit
 
    QgsSymbolRenderContext( QgsRenderContext &c, QgsUnitTypes::RenderUnit u, qreal opacity = 1.0, bool selected = false, QgsSymbol::RenderHints renderHints = QgsSymbol::RenderHints(), const QgsFeature *f = nullptr, const QgsFields &fields = QgsFields(), const QgsMapUnitScale &mapUnitScale = QgsMapUnitScale() );
 
    ~QgsSymbolRenderContext();
 
    QgsSymbolRenderContext( const QgsSymbolRenderContext &rh ) = delete;
 
    QgsRenderContext &renderContext() { return mRenderContext; }
 
    const QgsRenderContext &renderContext() const { return mRenderContext; } SIP_SKIP
 
    void setOriginalValueVariable( const QVariant &value );
 
    Q_DECL_DEPRECATED QgsUnitTypes::RenderUnit outputUnit() const SIP_DEPRECATED { return mOutputUnit; }
 
    Q_DECL_DEPRECATED void setOutputUnit( QgsUnitTypes::RenderUnit u ) SIP_DEPRECATED { mOutputUnit = u; }
 
    Q_DECL_DEPRECATED QgsMapUnitScale mapUnitScale() const SIP_DEPRECATED { return mMapUnitScale; }
 
    Q_DECL_DEPRECATED void setMapUnitScale( const QgsMapUnitScale &scale ) SIP_DEPRECATED { mMapUnitScale = scale; }
 
    qreal opacity() const { return mOpacity; }
 
    void setOpacity( qreal opacity ) { mOpacity = opacity; }
 
    bool selected() const { return mSelected; }
 
    void setSelected( bool selected ) { mSelected = selected; }
 
    QgsSymbol::RenderHints renderHints() const { return mRenderHints; }
 
    void setRenderHints( QgsSymbol::RenderHints hints ) { mRenderHints = hints; }
 
    void setFeature( const QgsFeature *f ) { mFeature = f; }
 
    const QgsFeature *feature() const { return mFeature; }
 
    void setOriginalGeometryType( QgsWkbTypes::GeometryType type ) { mOriginalGeometryType = type; }
 
    QgsWkbTypes::GeometryType originalGeometryType() const { return mOriginalGeometryType; }
 
    QgsFields fields() const { return mFields; }
 
    int geometryPartCount() const { return mGeometryPartCount; }
 
    void setGeometryPartCount( int count ) { mGeometryPartCount = count; }
 
    int geometryPartNum() const { return mGeometryPartNum; }
 
    void setGeometryPartNum( int num ) { mGeometryPartNum = num; }
 
    Q_DECL_DEPRECATED double outputLineWidth( double width ) const SIP_DEPRECATED;
 
    Q_DECL_DEPRECATED double outputPixelSize( double size ) const SIP_DEPRECATED;
 
    // workaround for sip 4.7. Don't use assignment - will fail with assertion error
    QgsSymbolRenderContext &operator=( const QgsSymbolRenderContext & );
 
    QgsExpressionContextScope *expressionContextScope();
 
    void setExpressionContextScope( QgsExpressionContextScope *contextScope SIP_TRANSFER );
 
    const QgsLegendPatchShape *patchShape() const;
 
    void setPatchShape( const QgsLegendPatchShape &shape );
 
  private:
 
#ifdef SIP_RUN
    QgsSymbolRenderContext( const QgsSymbolRenderContext &rh ) SIP_FORCE;
#endif
 
    QgsRenderContext &mRenderContext;
    std::unique_ptr< QgsExpressionContextScope > mExpressionContextScope;
    QgsUnitTypes::RenderUnit mOutputUnit;
    QgsMapUnitScale mMapUnitScale;
    qreal mOpacity = 1.0;
    bool mSelected;
    QgsSymbol::RenderHints mRenderHints;
    const QgsFeature *mFeature; //current feature
    QgsFields mFields;
    int mGeometryPartCount;
    int mGeometryPartNum;
    QgsWkbTypes::GeometryType mOriginalGeometryType = QgsWkbTypes::UnknownGeometry;
    std::unique_ptr< QgsLegendPatchShape > mPatchShape;
};
 
 
 
 
 
class CORE_EXPORT QgsMarkerSymbol : public QgsSymbol
{
  public:
 
    static QgsMarkerSymbol *createSimple( const QgsStringMap &properties ) SIP_FACTORY;
 
    QgsMarkerSymbol( const QgsSymbolLayerList &layers SIP_TRANSFER = QgsSymbolLayerList() );
 
    void setAngle( double symbolAngle );
 
    double angle() const;
 
    void setDataDefinedAngle( const QgsProperty &property );
 
    QgsProperty dataDefinedAngle() const;
 
    void setLineAngle( double lineAngle );
 
    void setSize( double size );
 
    double size() const;
 
    double size( const QgsRenderContext &context ) const;
 
    void setSizeUnit( QgsUnitTypes::RenderUnit unit );
 
    QgsUnitTypes::RenderUnit sizeUnit() const;
 
    void setSizeMapUnitScale( const QgsMapUnitScale &scale );
 
    QgsMapUnitScale sizeMapUnitScale() const;
 
    void setDataDefinedSize( const QgsProperty &property );
 
    QgsProperty dataDefinedSize() const;
 
    void setScaleMethod( QgsSymbol::ScaleMethod scaleMethod );
    ScaleMethod scaleMethod();
 
    void renderPoint( QPointF point, const QgsFeature *f, QgsRenderContext &context, int layer = -1, bool selected = false );
 
    QRectF bounds( QPointF point, QgsRenderContext &context, const QgsFeature &feature = QgsFeature() ) const;
 
    QgsMarkerSymbol *clone() const override SIP_FACTORY;
 
  private:
 
    void renderPointUsingLayer( QgsMarkerSymbolLayer *layer, QPointF point, QgsSymbolRenderContext &context );
 
};
 
 
class CORE_EXPORT QgsLineSymbol : public QgsSymbol
{
  public:
 
    static QgsLineSymbol *createSimple( const QgsStringMap &properties ) SIP_FACTORY;
 
    QgsLineSymbol( const QgsSymbolLayerList &layers SIP_TRANSFER = QgsSymbolLayerList() );
 
    void setWidth( double width );
 
    void setWidthUnit( QgsUnitTypes::RenderUnit unit );
 
 
    double width() const;
 
    double width( const QgsRenderContext &context ) const;
 
    void setDataDefinedWidth( const QgsProperty &property );
 
    QgsProperty dataDefinedWidth() const;
 
    void renderPolyline( const QPolygonF &points, const QgsFeature *f, QgsRenderContext &context, int layer = -1, bool selected = false );
 
    QgsLineSymbol *clone() const override SIP_FACTORY;
 
  private:
 
    void renderPolylineUsingLayer( QgsLineSymbolLayer *layer, const QPolygonF &points, QgsSymbolRenderContext &context );
 
};
 
 
class CORE_EXPORT QgsFillSymbol : public QgsSymbol
{
  public:
 
    static QgsFillSymbol *createSimple( const QgsStringMap &properties ) SIP_FACTORY;
 
    QgsFillSymbol( const QgsSymbolLayerList &layers SIP_TRANSFER = QgsSymbolLayerList() );
    void setAngle( double angle );
 
    void renderPolygon( const QPolygonF &points, const QVector<QPolygonF> *rings, const QgsFeature *f, QgsRenderContext &context, int layer = -1, bool selected = false );
 
    QgsFillSymbol *clone() const override SIP_FACTORY;
 
  private:
 
    void renderPolygonUsingLayer( QgsSymbolLayer *layer, const QPolygonF &points, const QVector<QPolygonF> *rings, QgsSymbolRenderContext &context );
    QRectF polygonBounds( const QPolygonF &points, const QVector<QPolygonF> *rings ) const;
    QVector<QPolygonF> *translateRings( const QVector<QPolygonF> *rings, double dx, double dy ) const;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS( QgsSymbol::PreviewFlags )
 
#endif