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;

    // implemented from base classes

    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;

    // new stuff

    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; }

    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;

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

    //use a custom dash dot pattern instead of the predefined ones
    bool mUseCustomDashPattern = false;
    QgsUnitTypes::RenderUnit mCustomDashPatternUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mCustomDashPatternMapUnitScale;

    QVector<qreal> mCustomDashVector;

    bool mDrawInsidePolygon = false;

  private:
    //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 QgsMarkerLineSymbolLayer : public QgsLineSymbolLayer
{
  public:
    QgsMarkerLineSymbolLayer( bool rotateMarker = DEFAULT_MARKERLINE_ROTATE,
                              double interval = DEFAULT_MARKERLINE_INTERVAL );

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

    // 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;

    void renderPolyline( const QPolygonF &points, QgsSymbolRenderContext &context ) override;

    void renderPolygonStroke( const QPolygonF &points, QList<QPolygonF> *rings, QgsSymbolRenderContext &context ) override;

    QgsStringMap properties() const 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;

    // new stuff

    bool rotateMarker() const { return mRotateMarker; }

    void setRotateMarker( bool rotate ) { mRotateMarker = rotate; }

    double interval() const { return mInterval; }

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

    Placement placement() const { return mPlacement; }

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

    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; }

    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; }

    void setOutputUnit( QgsUnitTypes::RenderUnit unit ) override;
    QgsUnitTypes::RenderUnit outputUnit() const override;

    void setMapUnitScale( const QgsMapUnitScale &scale ) override;
    QgsMapUnitScale mapUnitScale() const override;

    QSet<QString> usedAttributes( const QgsRenderContext &context ) const override;
    bool hasDataDefinedProperties() const override;

    void setDataDefinedProperty( QgsSymbolLayer::Property key, const QgsProperty &property ) override;


  protected:

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

    bool mRotateMarker;
    double mInterval;
    QgsUnitTypes::RenderUnit mIntervalUnit;
    QgsMapUnitScale mIntervalMapUnitScale;
    std::unique_ptr< QgsMarkerSymbol > mMarker;
    Placement mPlacement;
    double mOffsetAlongLine; //distance to offset along line before marker is drawn
    QgsUnitTypes::RenderUnit mOffsetAlongLineUnit; //unit for offset along line
    QgsMapUnitScale mOffsetAlongLineMapUnitScale;

  private:

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

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

#endif