/*************************************************************************/
/*  gradient_edit.h                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
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/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/*************************************************************************/

#ifndef GRADIENT_EDIT_H
#define GRADIENT_EDIT_H

#include "scene/gui/color_picker.h"
#include "scene/gui/popup.h"
#include "scene/resources/color_ramp.h"
#include "scene/resources/default_theme/theme_data.h"

#define POINT_WIDTH 8

class GradientEdit : public Control {

	GDCLASS(GradientEdit, Control);

	PopupPanel *popup;
	ColorPicker *picker;

	Ref<ImageTexture> checker;

	bool grabbing;
	int grabbed;
	Vector<Gradient::Point> points;

	void _draw_checker(int x, int y, int w, int h);
	void _color_changed(const Color &p_color);
	int _get_point_from_pos(int x);
	void _show_color_picker();

protected:
	void _gui_input(const Ref<InputEvent> &p_event);
	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_ramp(const Vector<float> &p_offsets, const Vector<Color> &p_colors);
	Vector<float> get_offsets() const;
	Vector<Color> get_colors() const;
	void set_points(Vector<Gradient::Point> &p_points);
	Vector<Gradient::Point> &get_points();
	virtual Size2 get_minimum_size() const;

	GradientEdit();
	virtual ~GradientEdit();
};

#endif // GRADIENT_EDIT_H