/homes/esi30/DCS339/coursework/src/display_unit.hpp

Go to the documentation of this file.

#ifndef DISPLAY_UNIT_HPP_INCLUDED
#define DISPLAY_UNIT_HPP_INCLUDED

#include <string>
#include <tuple>

#include <cairomm/context.h>
#include <cairomm/refptr.h>
#include <cairomm/surface.h>
#include <glibmm/refptr.h>
#include <gtkmm/drawingarea.h>
#include <gtkmm/textbuffer.h>
#include <gtkmm/textview.h>
#include <gdkmm.h>

#include "image.hpp"

class Display_page;

class Display_unit{
    public:
        virtual bool modifiable() const =0;

        virtual bool save() const =0;
        virtual void save_as(const std::string&) const =0;

    protected:
        std::shared_ptr<Display_unit> father; 
        std::shared_ptr<Display_unit> child; 
        friend class Processing_unit;
        friend class Display_page;
};

class Image_unit: public Display_unit, public Image, public Gtk::DrawingArea {
    public:
        explicit Image_unit(const std::string &filepath, bool mod=true);
        explicit Image_unit(const Image_unit *from, unsigned height, unsigned width, bool mod=true);

        Image_unit(const Image_unit &other);
        Image_unit(Image_unit &&other) noexcept;
        Image_unit& operator=(Image_unit other) noexcept;
        friend void swap(Image_unit &lhs, Image_unit &rhs) noexcept;

        //bool on_expose_event(GdkEventExpose* event);

        virtual bool on_draw(const Cairo::RefPtr<Cairo::Context> &context);

        bool modifiable() const;

        void redraw();

        bool save() const;
        void save_as(const std::string&) const;
        std::string get_path() const;

        void set_page(const Display_page*);
        std::tuple<int,int,int,int> selection() const;

    private:
        const Display_page *page;
        Cairo::RefPtr<Cairo::ImageSurface> image_surface; 
        Cairo::RefPtr<Cairo::Context> image_context; 
        bool is_modifiable;
        mutable std::string filepath;
};

class Info_unit: public Display_unit, public Gtk::TextView {
    public:
        Info_unit(const std::string &text);

        bool modifiable() const;

        bool save() const;
        void save_as(const std::string&) const;

    private:
        Glib::RefPtr<Gtk::TextBuffer> text_buffer; 
};

#endif