qgstransformeffect.h

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/***************************************************************************
                             qgstransformeffect.h
                             --------------------
    begin                : March 2015
    copyright            : (C) 2015 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 QGSTRANSFORMEFFECT_H
#define QGSTRANSFORMEFFECT_H

#include "qgis_core.h"
#include "qgspainteffect.h"
#include "qgis.h"
#include "qgsmapunitscale.h"
#include "qgsunittypes.h"
#include <QPainter>

class CORE_EXPORT QgsTransformEffect : public QgsPaintEffect
{

  public:

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

    QgsTransformEffect() = default;

    QString type() const override { return QStringLiteral( "transform" ); }
    QgsStringMap properties() const override;
    void readProperties( const QgsStringMap &props ) override;
    QgsTransformEffect *clone() const override SIP_FACTORY;

    void setTranslateX( const double translateX ) { mTranslateX = translateX; }

    double translateX() const { return mTranslateX; }

    void setTranslateY( const double translateY ) { mTranslateY = translateY; }

    double translateY() const { return mTranslateY; }

    void setTranslateUnit( const QgsUnitTypes::RenderUnit unit ) { mTranslateUnit = unit; }

    QgsUnitTypes::RenderUnit translateUnit() const { return mTranslateUnit; }

    void setTranslateMapUnitScale( const QgsMapUnitScale &scale ) { mTranslateMapUnitScale = scale; }

    const QgsMapUnitScale &translateMapUnitScale() const { return mTranslateMapUnitScale; }

    void setScaleX( const double scaleX ) { mScaleX = scaleX; }

    double scaleX() const { return mScaleX; }

    void setScaleY( const double scaleY ) { mScaleY = scaleY; }

    double scaleY() const { return mScaleY; }

    void setRotation( const double rotation ) { mRotation = rotation; }

    double rotation() const { return mRotation; }

    void setShearX( const double shearX ) { mShearX = shearX; }

    double shearX() const { return mShearX; }

    void setShearY( const double shearY ) { mShearY = shearY; }

    double shearY() const { return mShearY; }

    void setReflectX( const bool reflectX ) { mReflectX = reflectX; }

    bool reflectX() const { return mReflectX; }

    void setReflectY( const bool reflectY ) { mReflectY = reflectY; }

    bool reflectY() const { return mReflectY; }

  protected:

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

  private:

    double mTranslateX = 0.0;
    double mTranslateY = 0.0;
    QgsUnitTypes::RenderUnit mTranslateUnit = QgsUnitTypes::RenderMillimeters;
    QgsMapUnitScale mTranslateMapUnitScale;
    double mScaleX = 1.0;
    double mScaleY = 1.0;
    double mRotation = 0.0;
    double mShearX = 0.0;
    double mShearY = 0.0;
    bool mReflectX = false;
    bool mReflectY = false;

    QTransform createTransform( const QgsRenderContext &context ) const;

};

#endif // QGSTRANSFORMEFFECT_H