qgshighlight.h

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/***************************************************************************
    qgshighlight.h - widget to highlight geometries
     --------------------------------------
    Date                 : 02-Mar-2011
    Copyright            : (C) 2011 by Juergen E. Fischer, norBIT GmbH
    Email                : jef at norbit dot de
 ***************************************************************************
 *                                                                         *
 *   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 QGSHIGHLIGHT_H
#define QGSHIGHLIGHT_H

#include "qgsmapcanvasitem.h"
#include "qgsgeometry.h"
#include "qgssymbol.h"
#include <QBrush>
#include <QColor>
#include <QList>
#include <QPen>
#include <QPainter>
#include <QPainterPath>
#include "qgis_gui.h"

class QgsMapLayer;
class QgsVectorLayer;
class QgsSymbol;

class GUI_EXPORT QgsHighlight: public QObject, public QgsMapCanvasItem
{

    Q_OBJECT
    Q_PROPERTY( QColor color READ color WRITE setColor )
    Q_PROPERTY( QColor fillColor READ fillColor WRITE setFillColor )
    Q_PROPERTY( int width READ width WRITE setWidth )
    Q_PROPERTY( int buffer READ buffer WRITE setBuffer )

  public:

    QgsHighlight( QgsMapCanvas *mapCanvas, const QgsGeometry &geom, QgsMapLayer *layer );

    QgsHighlight( QgsMapCanvas *mapCanvas, const QgsFeature &feature, QgsVectorLayer *layer );
    ~QgsHighlight() override;

    QColor color( ) const { return  mColor; }

    void setColor( const QColor &color );

    QColor fillColor( ) const { return mFillColor; }

    void setFillColor( const QColor &fillColor );

    int width( ) const { return mWidth; }

    void setWidth( int width );

    double buffer( ) const { return mBuffer; }

    void setBuffer( double buffer ) { mBuffer = buffer; }

    void setMinWidth( double width ) { mMinWidth = width; }

    QgsMapLayer *layer() const { return mLayer; }

    void updatePosition() override;

  protected:
    void paint( QPainter *p ) override;

    void updateRect();

  private:
    void init();
    void setSymbol( QgsSymbol *symbol, const QgsRenderContext &context, const QColor &color, const QColor &fillColor );
    double getSymbolWidth( const QgsRenderContext &context, double width, QgsUnitTypes::RenderUnit unit );
    std::unique_ptr< QgsFeatureRenderer > createRenderer( QgsRenderContext &context, const QColor &color, const QColor &fillColor );
    void paintPoint( QPainter *p, const QgsPointXY &point );
    void paintLine( QPainter *p, QgsPolylineXY line );
    void paintPolygon( QPainter *p, const QgsPolygonXY &polygon );

    int mWidth = 1; // line / stroke width property
    QColor mColor; // line / stroke color property
    QColor mFillColor; // line / stroke fillColor property
    QBrush mBrush;
    QPen mPen;
    QgsGeometry *mGeometry = nullptr;
    QgsMapLayer *mLayer = nullptr;
    QgsFeature mFeature;
    double mBuffer = 0; // line / stroke buffer in pixels
    double mMinWidth = 0; // line / stroke minimum width in pixels
};

#endif