qgslinesymbollayer.h

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/***************************************************************************
 qgslinesymbollayer.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 QGSLINESYMBOLLAYER_H
#define QGSLINESYMBOLLAYER_H

#include "qgis_core.h"
#include "qgis.h"
#include "qgssymbollayer.h"

#include <QPen>
#include <QVector>

class QgsExpression;

#define DEFAULT_SIMPLELINE_COLOR     QColor(35,35,35)
#define DEFAULT_SIMPLELINE_WIDTH     DEFAULT_LINE_WIDTH
#define DEFAULT_SIMPLELINE_PENSTYLE  Qt::SolidLine
#define DEFAULT_SIMPLELINE_JOINSTYLE Qt::BevelJoin
#define DEFAULT_SIMPLELINE_CAPSTYLE  Qt::SquareCap

class CORE_EXPORT QgsSimpleLineSymbolLayer : public QgsLineSymbolLayer
{
  public:

    QgsSimpleLineSymbolLayer( const QColor &color = DEFAULT_SIMPLELINE_COLOR,
                              double width = DEFAULT_SIMPLELINE_WIDTH,
                              Qt::PenStyle penStyle = DEFAULT_SIMPLELINE_PENSTYLE );

    // static stuff

    static QgsSymbolLayer *create( const QgsStringMap &properties = QgsStringMap() ) SIP_FACTORY;

    static QgsSymbolLayer *createFromSld( QDomElement &element ) SIP_FACTORY;

    QString layerType() const override;
    void startRender( QgsSymbolRenderContext &context ) override;
    void stopRender( QgsSymbolRenderContext &context ) override;
    void renderPolyline( const QPolygonF &points, QgsSymbolRenderContext &context ) override;
    //overridden so that clip path can be set when using draw inside polygon option
    void renderPolygonStroke( const QPolygonF &points, QList<QPolygonF> *rings, QgsSymbolRenderContext &context ) override;
    QgsStringMap properties() const override;
    QgsSimpleLineSymbolLayer *clone() const override SIP_FACTORY;
    void toSld( QDomDocument &doc, QDomElement &element, const QgsStringMap &props ) const override;
    QString ogrFeatureStyle( double mmScaleFactor, double mapUnitScaleFactor ) const override;
    void setOutputUnit( QgsUnitTypes::RenderUnit unit ) override;
    QgsUnitTypes::RenderUnit outputUnit() const override;
    void setMapUnitScale( const QgsMapUnitScale &scale ) override;
    QgsMapUnitScale mapUnitScale() const override;
    double estimateMaxBleed( const QgsRenderContext &context ) const override;
    QVector<qreal> dxfCustomDashPattern( QgsUnitTypes::RenderUnit &unit ) const override;
    Qt::PenStyle dxfPenStyle() const override;
    double dxfWidth( const QgsDxfExport &e, QgsSymbolRenderContext &context ) const override;
    double dxfOffset( const QgsDxfExport &e, QgsSymbolRenderContext &context ) const override;
    QColor dxfColor( QgsSymbolRenderContext &context ) const override;

    Qt::PenStyle penStyle() const { return mPenStyle; }

    void setPenStyle( Qt::PenStyle style ) { mPenStyle = style; }

    Qt::PenJoinStyle penJoinStyle() const { return mPenJoinStyle; }

    void setPenJoinStyle( Qt::PenJoinStyle style ) { mPenJoinStyle = style; }

    Qt::PenCapStyle penCapStyle() const { return mPenCapStyle; }

    void setPenCapStyle( Qt::PenCapStyle style ) { mPenCapStyle = style; }

    bool useCustomDashPattern() const { return mUseCustomDashPattern; }

    void setUseCustomDashPattern( bool b ) { mUseCustomDashPattern = b; }

    void setCustomDashPatternUnit( QgsUnitTypes::RenderUnit unit ) { mCustomDashPatternUnit = unit; }

    QgsUnitTypes::RenderUnit customDashPatternUnit() const { return mCustomDashPatternUnit; }

    const QgsMapUnitScale &customDashPatternMapUnitScale() const { return mCustomDashPatternMapUnitScale; }

    void setCustomDashPatternMapUnitScale( const QgsMapUnitScale &scale ) { mCustomDashPatternMapUnitScale = scale; }

    QVector<qreal> customDashVector() const { return mCustomDashVector; }

    void setCustomDashVector( const QVector<qreal> &vector ) { mCustomDashVector = vector; }

    bool drawInsidePolygon() const { return mDrawInsidePolygon; }

    void setDrawInsidePolygon( bool drawInsidePolygon ) { mDrawInsidePolygon = drawInsidePolygon; }

  private:

    Qt::PenStyle mPenStyle = Qt::SolidLine;
    Qt::PenJoinStyle mPenJoinStyle = DEFAULT_SIMPLELINE_JOINSTYLE;
    Qt::PenCapStyle mPenCapStyle = DEFAULT_SIMPLELINE_CAPSTYLE;
    QPen mPen;
    QPen mSelPen;

    bool mUseCustomDashPattern = false;
    QgsUnitTypes::RenderUnit mCustomDashPatternUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mCustomDashPatternMapUnitScale;

    QVector<qreal> mCustomDashVector;

    bool mDrawInsidePolygon = false;

    //helper functions for data defined symbology
    void applyDataDefinedSymbology( QgsSymbolRenderContext &context, QPen &pen, QPen &selPen, double &offset );
};


#define DEFAULT_MARKERLINE_ROTATE     true
#define DEFAULT_MARKERLINE_INTERVAL   3

class CORE_EXPORT QgsTemplatedLineSymbolLayerBase : public QgsLineSymbolLayer
{
  public:

    enum Placement
    {
      Interval, 
      Vertex, 
      LastVertex, 
      FirstVertex, 
      CentralPoint, 
      CurvePoint, 
      SegmentCenter, 
    };

    QgsTemplatedLineSymbolLayerBase( bool rotateSymbol = true,
                                     double interval = 3 );

    bool rotateSymbols() const { return mRotateSymbols; }

    void setRotateSymbols( bool rotate ) { mRotateSymbols = rotate; }

    double interval() const { return mInterval; }

    void setInterval( double interval ) { mInterval = interval; }

    void setIntervalUnit( QgsUnitTypes::RenderUnit unit ) { mIntervalUnit = unit; }

    QgsUnitTypes::RenderUnit intervalUnit() const { return mIntervalUnit; }

    void setIntervalMapUnitScale( const QgsMapUnitScale &scale ) { mIntervalMapUnitScale = scale; }

    const QgsMapUnitScale &intervalMapUnitScale() const { return mIntervalMapUnitScale; }

    Placement placement() const { return mPlacement; }

    void setPlacement( Placement placement ) { mPlacement = placement; }

    double offsetAlongLine() const { return mOffsetAlongLine; }

    void setOffsetAlongLine( double offsetAlongLine ) { mOffsetAlongLine = offsetAlongLine; }

    QgsUnitTypes::RenderUnit offsetAlongLineUnit() const { return mOffsetAlongLineUnit; }

    void setOffsetAlongLineUnit( QgsUnitTypes::RenderUnit unit ) { mOffsetAlongLineUnit = unit; }

    const QgsMapUnitScale &offsetAlongLineMapUnitScale() const { return mOffsetAlongLineMapUnitScale; }

    void setOffsetAlongLineMapUnitScale( const QgsMapUnitScale &scale ) { mOffsetAlongLineMapUnitScale = scale; }

    double averageAngleLength() const { return mAverageAngleLength; }

    void setAverageAngleLength( double length ) { mAverageAngleLength = length; }

    void setAverageAngleUnit( QgsUnitTypes::RenderUnit unit ) { mAverageAngleLengthUnit = unit; }

    QgsUnitTypes::RenderUnit averageAngleUnit() const { return mAverageAngleLengthUnit; }

    void setAverageAngleMapUnitScale( const QgsMapUnitScale &scale ) { mAverageAngleLengthMapUnitScale = scale; }

    const QgsMapUnitScale &averageAngleMapUnitScale() const { return mAverageAngleLengthMapUnitScale; }

    void renderPolyline( const QPolygonF &points, QgsSymbolRenderContext &context ) FINAL;
    void renderPolygonStroke( const QPolygonF &points, QList<QPolygonF> *rings, QgsSymbolRenderContext &context ) FINAL;
    QgsUnitTypes::RenderUnit outputUnit() const FINAL;
    void setMapUnitScale( const QgsMapUnitScale &scale ) FINAL;
    QgsMapUnitScale mapUnitScale() const FINAL;
    QgsStringMap properties() const override;

  protected:

    virtual void setSymbolLineAngle( double angle ) = 0;

    virtual double symbolAngle() const = 0;

    virtual void setSymbolAngle( double angle ) = 0;

    virtual void renderSymbol( const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer = -1, bool selected = false ) = 0;

    void copyTemplateSymbolProperties( QgsTemplatedLineSymbolLayerBase *destLayer ) const;

    static void setCommonProperties( QgsTemplatedLineSymbolLayerBase *destLayer, const QgsStringMap &properties );

  private:

    void renderPolylineInterval( const QPolygonF &points, QgsSymbolRenderContext &context, double averageAngleOver );
    void renderPolylineVertex( const QPolygonF &points, QgsSymbolRenderContext &context, QgsTemplatedLineSymbolLayerBase::Placement placement = QgsTemplatedLineSymbolLayerBase::Vertex );
    void renderPolylineCentral( const QPolygonF &points, QgsSymbolRenderContext &context, double averageAngleOver );
    double markerAngle( const QPolygonF &points, bool isRing, int vertex );

    void renderOffsetVertexAlongLine( const QPolygonF &points, int vertex, double distance, QgsSymbolRenderContext &context );


    static void collectOffsetPoints( const QVector< QPointF> &points,
                                     QVector< QPointF> &dest, double intervalPainterUnits, double initialOffset, double initialLag = 0,
                                     int numberPointsRequired = -1 );

    bool mRotateSymbols = true;
    double mInterval = 3;
    QgsUnitTypes::RenderUnit mIntervalUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mIntervalMapUnitScale;
    Placement mPlacement = Interval;
    double mOffsetAlongLine = 0; //distance to offset along line before marker is drawn
    QgsUnitTypes::RenderUnit mOffsetAlongLineUnit = QgsUnitTypes::RenderMillimeters; //unit for offset along line
    QgsMapUnitScale mOffsetAlongLineMapUnitScale;
    double mAverageAngleLength = 4;
    QgsUnitTypes::RenderUnit mAverageAngleLengthUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mAverageAngleLengthMapUnitScale;

    friend class TestQgsMarkerLineSymbol;

};

class CORE_EXPORT QgsMarkerLineSymbolLayer : public QgsTemplatedLineSymbolLayerBase
{
  public:

    QgsMarkerLineSymbolLayer( bool rotateMarker = DEFAULT_MARKERLINE_ROTATE,
                              double interval = DEFAULT_MARKERLINE_INTERVAL );

    // static stuff

    static QgsSymbolLayer *create( const QgsStringMap &properties = QgsStringMap() ) SIP_FACTORY;

    static QgsSymbolLayer *createFromSld( QDomElement &element ) SIP_FACTORY;

    // implemented from base classes

    QString layerType() const override;
    void startRender( QgsSymbolRenderContext &context ) override;
    void stopRender( QgsSymbolRenderContext &context ) override;
    QgsMarkerLineSymbolLayer *clone() const override SIP_FACTORY;
    void toSld( QDomDocument &doc, QDomElement &element, const QgsStringMap &props ) const override;
    void setColor( const QColor &color ) override;
    QColor color() const override;
    QgsSymbol *subSymbol() override;
    bool setSubSymbol( QgsSymbol *symbol SIP_TRANSFER ) override;
    void setWidth( double width ) override;
    double width() const override;
    double width( const QgsRenderContext &context ) const override;
    double estimateMaxBleed( const QgsRenderContext &context ) const override;
    void setOutputUnit( QgsUnitTypes::RenderUnit unit ) override;
    QSet<QString> usedAttributes( const QgsRenderContext &context ) const override;
    bool hasDataDefinedProperties() const override;
    void setDataDefinedProperty( QgsSymbolLayer::Property key, const QgsProperty &property ) override;

    Q_DECL_DEPRECATED bool rotateMarker() const SIP_DEPRECATED { return rotateSymbols(); }

    Q_DECL_DEPRECATED void setRotateMarker( bool rotate ) SIP_DEPRECATED { setRotateSymbols( rotate ); }

  protected:

    std::unique_ptr< QgsMarkerSymbol > mMarker;

    void setSymbolLineAngle( double angle ) override;
    double symbolAngle() const override;
    void setSymbolAngle( double angle ) override;
    void renderSymbol( const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer = -1, bool selected = false ) override;

  private:

#ifdef SIP_RUN
    QgsMarkerLineSymbolLayer( const QgsMarkerLineSymbolLayer &other );
#endif


};


class CORE_EXPORT QgsHashedLineSymbolLayer : public QgsTemplatedLineSymbolLayerBase
{
  public:

    QgsHashedLineSymbolLayer( bool rotateSymbol = true,
                              double interval = 3 );

    static QgsSymbolLayer *create( const QgsStringMap &properties = QgsStringMap() ) SIP_FACTORY;

    QString layerType() const override;
    void startRender( QgsSymbolRenderContext &context ) override;
    void stopRender( QgsSymbolRenderContext &context ) override;
    QgsStringMap properties() const override;
    QgsHashedLineSymbolLayer *clone() const override SIP_FACTORY;
    void setColor( const QColor &color ) override;
    QColor color() const override;
    QgsSymbol *subSymbol() override;
    bool setSubSymbol( QgsSymbol *symbol SIP_TRANSFER ) override;
    void setWidth( double width ) override;
    double width() const override;
    double width( const QgsRenderContext &context ) const override;
    double estimateMaxBleed( const QgsRenderContext &context ) const override;
    void setOutputUnit( QgsUnitTypes::RenderUnit unit ) override;
    QSet<QString> usedAttributes( const QgsRenderContext &context ) const override;
    bool hasDataDefinedProperties() const override;
    void setDataDefinedProperty( QgsSymbolLayer::Property key, const QgsProperty &property ) override;

    double hashAngle() const;

    void setHashAngle( double angle );

    double hashLength() const { return mHashLength; }

    void setHashLength( double length ) { mHashLength = length; }

    void setHashLengthUnit( QgsUnitTypes::RenderUnit unit ) { mHashLengthUnit = unit; }

    QgsUnitTypes::RenderUnit hashLengthUnit() const { return mHashLengthUnit; }

    void setHashLengthMapUnitScale( const QgsMapUnitScale &scale ) { mHashLengthMapUnitScale = scale; }

    const QgsMapUnitScale &hashLengthMapUnitScale() const { return mHashLengthMapUnitScale; }

  protected:

    void setSymbolLineAngle( double angle ) override;
    double symbolAngle() const override;
    void setSymbolAngle( double angle ) override;
    void renderSymbol( const QPointF &point, const QgsFeature *feature, QgsRenderContext &context, int layer = -1, bool selected = false ) override;

  private:
#ifdef SIP_RUN
    QgsHashedLineSymbolLayer( const QgsHashedLineSymbolLayer &other );
#endif

    std::unique_ptr< QgsLineSymbol > mHashSymbol;

    double mSymbolLineAngle = 0;
    double mSymbolAngle = 0;

    double mHashAngle = 0;
    double mHashLength = 3;
    QgsUnitTypes::RenderUnit mHashLengthUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mHashLengthMapUnitScale;

};

#endif