// Copyright (c) 2007, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
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//   * Neither the name of the Aegisub Group nor the names of its contributors
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// Aegisub Project http://www.aegisub.org/
//
// $Id$

/// @file visual_feature->h
/// @see visual_feature->cpp
/// @ingroup visual_ts
///

#pragma once

#include "vector2d.h"

class OpenGLWrapper;
class AssDialogue;

/// DOCME
enum DraggableFeatureType {

	/// DOCME
	DRAG_NONE,

	/// DOCME
	DRAG_BIG_SQUARE,

	/// DOCME
	DRAG_BIG_CIRCLE,

	/// DOCME
	DRAG_BIG_TRIANGLE,

	/// DOCME
	DRAG_SMALL_SQUARE,

	/// DOCME
	DRAG_SMALL_CIRCLE
};

/// DOCME
/// @class VisualDraggableFeature
/// @brief Onscreen control used by many visual tools which doesn't do much
class VisualDraggableFeature {
	Vector2D start; ///< position before the last operation began

public:
	/// @brief Constructor
	VisualDraggableFeature();

	/// Shape of feature
	DraggableFeatureType type;

	Vector2D pos;

	int layer; /// Layer; Higher = above

	AssDialogue* line; /// The dialogue line this feature is for

	/// @brief Is the given point over this feature?
	/// @param mouse_pos Position of the mouse
	bool IsMouseOver(Vector2D mouse_pos) const;

	/// @brief Draw this feature
	/// @param gl OpenGLWrapper to use
	void Draw(OpenGLWrapper const& gl) const;

	void StartDrag();

	void UpdateDrag(Vector2D d, bool single_axis);

	bool HasMoved() const;
};