/*************************************************************************/
/*  scroll_container.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
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/* "Software"), to deal in the Software without restriction, including   */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
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/* The above copyright notice and this permission notice shall be        */
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/*************************************************************************/

#ifndef SCROLL_CONTAINER_H
#define SCROLL_CONTAINER_H

#include "container.h"

#include "scroll_bar.h"

class ScrollContainer : public Container {

	GDCLASS(ScrollContainer, Container);

	HScrollBar *h_scroll;
	VScrollBar *v_scroll;

	Size2 child_max_size;
	Size2 scroll;

	void update_scrollbars();

	Vector2 drag_speed;
	Vector2 drag_accum;
	Vector2 drag_from;
	Vector2 last_drag_accum;
	float last_drag_time;
	float time_since_motion;
	bool drag_touching;
	bool drag_touching_deaccel;
	bool click_handled;
	bool beyond_deadzone;

	bool scroll_h;
	bool scroll_v;

	int deadzone;
	bool follow_focus;

	void _cancel_drag();

protected:
	Size2 get_minimum_size() const;

	void _gui_input(const Ref<InputEvent> &p_gui_input);
	void _notification(int p_what);

	void _scroll_moved(float);
	static void _bind_methods();

	void _update_scrollbar_position();
	void _ensure_focused_visible(Control *p_node);

public:
	int get_v_scroll() const;
	void set_v_scroll(int p_pos);

	int get_h_scroll() const;
	void set_h_scroll(int p_pos);

	void set_enable_h_scroll(bool p_enable);
	bool is_h_scroll_enabled() const;

	void set_enable_v_scroll(bool p_enable);
	bool is_v_scroll_enabled() const;

	int get_deadzone() const;
	void set_deadzone(int p_deadzone);

	bool is_following_focus() const;
	void set_follow_focus(bool p_follow);

	HScrollBar *get_h_scrollbar();
	VScrollBar *get_v_scrollbar();

	virtual bool clips_input() const;

	virtual String get_configuration_warning() const;

	ScrollContainer();
};

#endif
