qgspiechartplot.h

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/***************************************************************************
                         qgspiechartplot.h
                         -----------------
    begin                : September 2025
    copyright            : (C) 2025 by Mathieu Pellerin
    email                : mathieu at opengis dot ch
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSPIECHARTPLOT_H
#define QGSPIECHARTPLOT_H
 
#include "qgis_core.h"
#include "qgis_sip.h"
#include "qgscolorramp.h"
#include "qgsfillsymbol.h"
#include "qgsnumericformat.h"
#include "qgsplot.h"
 
#include <QString>
 
using namespace Qt::StringLiterals;
 
class QgsVectorLayerAbstractPlotDataGatherer;
 

class CORE_EXPORT QgsPieChartPlot : public Qgs2DPlot
{
  public:
    QgsPieChartPlot();
    ~QgsPieChartPlot() override = default;
 
    QString type() const override { return u"pie"_s; }
 
    void renderContent( QgsRenderContext &context, QgsPlotRenderContext &plotContext, const QRectF &plotArea, const QgsPlotData &plotData = QgsPlotData() ) override;
 
    bool writeXml( QDomElement &element, QDomDocument &document, const QgsReadWriteContext &context ) const override;
    bool readXml( const QDomElement &element, const QgsReadWriteContext &context ) override;

    QgsFillSymbol *fillSymbolAt( int index ) const;

    void setFillSymbolAt( int index, QgsFillSymbol *symbol SIP_TRANSFER );

    QgsColorRamp *colorRampAt( int index ) const;

    void setColorRampAt( int index, QgsColorRamp *ramp SIP_TRANSFER );

    int fillSymbolCount() const { return mFillSymbols.size(); }

    int colorRampCount() const { return mColorRamps.size(); }

    QgsTextFormat textFormat() const { return mLabelTextFormat; }

    void setTextFormat( const QgsTextFormat &format );

    QgsNumericFormat *numericFormat() const { return mNumericFormat.get(); }

    void setNumericFormat( QgsNumericFormat *format SIP_TRANSFER );

    Qgis::PieChartLabelType labelType() const { return mLabelType; }

    void setLabelType( Qgis::PieChartLabelType type );

    static QgsPieChartPlot *create() SIP_FACTORY;

    static QgsVectorLayerAbstractPlotDataGatherer *createDataGatherer( QgsPlot *plot ) SIP_TRANSFERBACK;

    void initFromPlot( const QgsPlot *plot ) override;
 
  private:
    std::vector<std::unique_ptr<QgsFillSymbol>> mFillSymbols;
    std::vector<std::unique_ptr<QgsColorRamp>> mColorRamps;
 
    std::unique_ptr< QgsNumericFormat > mNumericFormat;
 
    QgsTextFormat mLabelTextFormat;
    Qgis::PieChartLabelType mLabelType = Qgis::PieChartLabelType::NoLabels;
};
 
#endif // QGSLINECHARTPLOT_H