/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  RawTherapee is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef _SHCSELECTOR_
#define _SHCSELECTOR_

#include "coloredbar.h"
#include <gtkmm.h>

class SHCListener {
public:
    virtual ~SHCListener() = default;
    virtual void shcChanged() = 0;
};

class SHCSelector: public Gtk::DrawingArea, BackBuffer {

protected:
    int movingPosition;
    double tmpX, tmpPos;

    double defaults[3];
    double positions[3];
    double wslider;

    // left margin, essentially a workaround to take care of an eventual right
    // colored bar (e.g. for curves)
    int leftMargin;
    // right margin, essentially a workaround to take care of an eventual right
    // colored bar
    int rightMargin;

    const static int hb = 3; // horizontal border
    const static int vb = 4; // vertical border

    SHCListener *cl;

    Gtk::SizeRequestMode get_request_mode_vfunc() const override;
    void get_preferred_height_vfunc(int &minimum_height,
                                    int &natural_height) const override;
    void get_preferred_width_vfunc(int &minimum_width,
                                   int &natural_width) const override;
    void
    get_preferred_height_for_width_vfunc(int width, int &minimum_height,
                                         int &natural_height) const override;
    void
    get_preferred_width_for_height_vfunc(int height, int &minimum_width,
                                         int &natural_width) const override;
    void on_realize() override;
    bool on_draw(const ::Cairo::RefPtr<Cairo::Context> &cr) override;
    bool on_button_press_event(GdkEventButton *event) override;
    bool on_button_release_event(GdkEventButton *event) override;
    bool on_motion_notify_event(GdkEventMotion *event) override;
    void updateBackBuffer();

public:
    ColoredBar coloredBar;

    SHCSelector();

    void setSHCListener(SHCListener *l)
    {
        cl = l;
        ;
    }

    void setMargins(int left, int right);
    void setDefaults(double spos, double cpos, double hpos);
    void setPositions(double spos, double cpos, double hpos);
    void getPositions(double &spos, double &cpos, double &hpos);
    void styleChanged(const Glib::RefPtr<Gtk::Style> &style);
    bool reset();
    void refresh();
};

#endif
