qgsshadoweffect.h

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/***************************************************************************
                             qgsshadoweffect.h
                             -----------------
    begin                : December 2014
    copyright            : (C) 2014 Nyall Dawson
    email                : nyall dot dawson 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 QGSSHADOWEFFECT_H
#define QGSSHADOWEFFECT_H

#include "qgis_core.h"
#include "qgspainteffect.h"
#include "qgis.h"
#include "qgssymbol.h"
#include <QPainter>

class CORE_EXPORT QgsShadowEffect : public QgsPaintEffect
{

  public:

    QgsShadowEffect();

    QgsStringMap properties() const override;
    void readProperties( const QgsStringMap &props ) override;

    void setBlurLevel( const int level ) { mBlurLevel = level; }

    int blurLevel() const { return mBlurLevel; }

    void setOffsetAngle( const int angle ) { mOffsetAngle = angle; }

    int offsetAngle() const { return mOffsetAngle; }

    void setOffsetDistance( const double distance ) { mOffsetDist = distance; }

    double offsetDistance() const { return mOffsetDist; }

    void setOffsetUnit( const QgsUnitTypes::RenderUnit unit ) { mOffsetUnit = unit; }

    QgsUnitTypes::RenderUnit offsetUnit() const { return mOffsetUnit; }

    void setOffsetMapUnitScale( const QgsMapUnitScale &scale ) { mOffsetMapUnitScale = scale; }

    const QgsMapUnitScale &offsetMapUnitScale() const { return mOffsetMapUnitScale; }

    void setColor( const QColor &color ) { mColor = color; }

    QColor color() const { return mColor; }

    void setOpacity( const double opacity ) { mOpacity = opacity; }

    double opacity() const { return mOpacity; }

    void setBlendMode( const QPainter::CompositionMode mode ) { mBlendMode = mode; }

    QPainter::CompositionMode blendMode() const { return mBlendMode; }

  protected:

    QRectF boundingRect( const QRectF &rect, const QgsRenderContext &context ) const override;
    void draw( QgsRenderContext &context ) override;

    virtual bool exteriorShadow() const = 0;

    int mBlurLevel = 10;
    int mOffsetAngle = 135;
    double mOffsetDist = 2.0;
    QgsUnitTypes::RenderUnit mOffsetUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mOffsetMapUnitScale;
    double mOpacity = 1.0;
    QColor mColor;
    QPainter::CompositionMode mBlendMode = QPainter::CompositionMode_Multiply;

};


class CORE_EXPORT QgsDropShadowEffect : public QgsShadowEffect
{

  public:

    static QgsPaintEffect *create( const QgsStringMap &map ) SIP_FACTORY;

    QgsDropShadowEffect();

    QString type() const override;
    QgsDropShadowEffect *clone() const override SIP_FACTORY;

  protected:

    bool exteriorShadow() const override;

};

class CORE_EXPORT QgsInnerShadowEffect : public QgsShadowEffect
{

  public:

    static QgsPaintEffect *create( const QgsStringMap &map ) SIP_FACTORY;

    QgsInnerShadowEffect();

    QString type() const override;
    QgsInnerShadowEffect *clone() const override SIP_FACTORY;

  protected:

    bool exteriorShadow() const override;

};

#endif // QGSSHADOWEFFECT_H