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

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

#include <gtkmm/image.h>
#include <gtkmm/dialog.h>
#include <gtkmm/spinbutton.h>
#include <gtkmm/label.h>
#include <gtkmm/enums.h>
#include <gtkmm/stock.h>

#include "../display_unit.hpp"
#include "../processing_page.hpp"
#include "../processing_unit.hpp"
#include "../utils.hpp"
#include "../progress.hpp"
#include "order_statistic.hpp"

namespace{
    class Config: public Gtk::Dialog {
        public:
            Config(int m): adj(Gtk::Adjustment::create(1, 1, m, 1, 5)), tt("Radius:"), bt(adj), rad(0) {
                set_resizable(false);

                get_vbox()->pack_start(tt);
                get_vbox()->pack_start(bt);

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

                show_all_children();
            }

            unsigned radius(){
                rad=rad?rad:bt.get_value();
                return rad;
            }
        private:
            Glib::RefPtr<Gtk::Adjustment> adj;
            Gtk::Label tt;
            Gtk::SpinButton bt;
            unsigned rad;
    };

    Display_unit *impl(const Image_unit *in){
        Config config(std::max(in->width(), in->height()));
        if(config.run()!=Gtk::RESPONSE_OK)
            return nullptr;
        config.hide();

        return apply_order_statistic(in, config.radius(), [](const std::vector<unsigned char> &v) -> unsigned char { return (v.back()+v.front())/2; });
    }
}

namespace Processes{
    void mid_point_filter(){
        Gtk::Image icon(cmake_install_prefix+std::string("/share/egami/icons/mid_point_filter.png"));
        std::shared_ptr<Processing_unit> pu(new Processing_unit(Processing(&impl), "Mid point filter", icon, false));
        Processing_page::add_unit_to_page("Order statistic", pu);
    }
}