wLegendEntity.hpp

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/*
+---------------------------------------------------------------------------------------------------------------------------------------------------+
Created by Wilfried Koch.
Copyright @ 2025 Wilfried Koch. All rights reserved.
+---------------------------------------------------------------------------------------------------------------------------------------------------+
*/
 
#ifndef W_LEGEND_ENTITY_HPP
#define W_LEGEND_ENTITY_HPP
 
#include "../srcEntity/wEntity.hpp"
#include "wLineEntity.hpp"
#include "wFrameEntity.hpp"
 
#include "wFunctionEntity.hpp"
#include "wDataPlotEntity.hpp"
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
#pragma GCC diagnostic ignored "-Wswitch-default"
#include <SFML/Graphics.hpp>
#pragma GCC diagnostic pop
 
namespace wPlot2D
{
 

    class LegendEntity : public wEngine::Entity
    {
        public:
            LegendEntity( const sf::Font& font, const sf::Vector2f& position, bool hasFrame = true );

            virtual ~LegendEntity( ) = default;

            void addItem( const std::string& label, FunctionEntity* function );

            void addItem( const std::wstring& label, FunctionEntity* function );

            void addItem( const std::string& label, DataPlotEntity* plot );

            void addItem( const std::wstring& label, DataPlotEntity* plot );

            void setFrameEnabled( bool enabled );

            void setFrameFillColor( const sf::Color& color );

            void setFrameOutlineColor( const sf::Color& color );

            void setFrameThickness( float thickness );

            void setPadding( const sf::Vector2f& padding );

            void setFont( const sf::Font& font );

            void setCharacterSize( unsigned int size );

            void setTextColor( const sf::Color& color );

            void render( sf::RenderWindow& window );
        private:
            struct LegendItem
            {
                std::string label;
                std::unique_ptr< LineEntity > line;
                sf::Text labelText;
 
                LegendItem( std::unique_ptr< LineEntity > line, sf::Text&& txt )
                :   line{ std::move( line ) },
                    labelText{ std::move( txt ) }
                    {
 
                    }
            };

            template < typename LabelT, typename SourceT >
            void addItemGeneric( const LabelT& label, SourceT* source );

            template< typename T >
            void createItem( const T& label, std::unique_ptr< LineEntity > line );
 
            std::vector< LegendItem > mItems;
            const sf::Font& mFont;
            unsigned int mCharacterSize = 30;
            FrameEntity mFrame;
    };
 
} // namespace wPlot2D
 
#endif