/homes/esi30/DCS339/coursework/src/Processes/laplacian.cpp

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#include <algorithm>
#include <memory>
#include <string>

#include <gtkmm/image.h>
#include <gtkmm/dialog.h>
#include <gtkmm/radiobutton.h>
#include <gtkmm/stock.h>

#include "../display_unit.hpp"
#include "../processing_page.hpp"
#include "../processing_unit.hpp"
#include "../utils.hpp"
#include "convolution.hpp"

namespace{
    class Config: public Gtk::Dialog {
        public:
            enum Mode {UNKNOW, LAPLACIAN4, LAPLACIAN8};
            Config(): q("Algorithm:"), l4("Laplacian 4"), l8("Laplacian 8") {
                set_resizable(false);

                Gtk::RadioButton::Group group = l4.get_group();
                l8.set_group(group);

                get_vbox()->pack_start(q);
                get_vbox()->pack_start(l4);
                get_vbox()->pack_start(l8);

                l4.set_active();

                add_button(Gtk::Stock::OK, Gtk::RESPONSE_OK);
                add_button(Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);

                show_all_children();
            }

            Mode mode(){
                if(l4.get_active())
                    return LAPLACIAN4;
                else if(l8.get_active())
                    return LAPLACIAN8;
                else
                    return UNKNOW;
            }

        private:
            Gtk::Label q;
            Gtk::RadioButton l4, l8;
    };

    Display_unit* impl(const Image_unit *in){
        Config c;
        if(c.run()!=Gtk::RESPONSE_OK)
            return nullptr;
        c.hide();

        switch(c.mode()){
            case Config::LAPLACIAN4:{
                std::array<std::array<double, 3>, 3> kernel={{{{0., -1., 0.}},{{-1., 4., -1.}},{{0., -1., 0.}}}};
                return apply<1>(in, kernel, 1);
            } case Config::LAPLACIAN8:{
                std::array<std::array<double, 3>, 3> kernel={{{{-1., -1., -1.}},{{-1., 8., -1.}},{{-1., -1., -1.}}}};
                return apply<1>(in, kernel, 1);
            } default:
                return nullptr;
        }
    }
}

namespace Processes{
    void laplacian(){
        Gtk::Image icon(cmake_install_prefix+std::string("/share/egami/icons/laplacian.png"));
        std::shared_ptr<Processing_unit> pu(new Processing_unit(Processing(&impl), "Laplacian", icon, false));
        Processing_page::add_unit_to_page("Edge detection", pu);
    }
}