/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            selection.h
 *
 *  Sat Nov 21 13:20:46 CET 2009
 *  Copyright 2009 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo 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 2 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#pragma once

#include <QObject>

#include <QMap>
#include <QVector>

class Selection
{
public:
	Selection(int from = 0, int to = 0, int fadein = 0, int fadeout = 0)
	{
		this->from = from;
		this->to = to;
		this->fadein = fadein;
		this->fadeout = fadeout;
	}
	size_t from;
	size_t to;
	size_t fadein;
	size_t fadeout;

	double energy;

	QString name;
};

typedef int sel_id_t;
#define SEL_NONE -1

class Selections
	: public QObject
{
	Q_OBJECT
public:
	Selections();
	Selections(const Selections&);

	void operator=(const Selections& other);

	//! Add a new selection object. The new id is returned.
	//! Adding a new selections will emit an added signal with the new id.
	sel_id_t add(Selection selection);

	//! Get a stack copy of a specific selection object, by id.
	//! NOTE: If id does not exist an empty selection (from = to = 0) is
	//! returned.
	Selection get(sel_id_t id);

	//! Return vector (unsorted) of all ids in the object.
	QVector<sel_id_t> ids();

	//! Set active selection (to be rendered yellow)
	void setActive(sel_id_t id);

	//! Get active selection id.
	sel_id_t active();

public slots:
	//! Update a selection by id.
	//! Updating a selection will emit a updated signal.
	void update(sel_id_t id, Selection selection);

	//! Delete a selection by id.
	//! Deleting a selection will emit a deleted signal.
	void remove(sel_id_t id);

	//! Delete all selections
	void clear();

signals:
	//! This signal is emitted when a new selection has been added.
	void added(sel_id_t id);

	//! This signal is emitted when an existing selection has been updated.
	void updated(sel_id_t id);

	//! This signal is emitted when a selection has been removed.
	void removed(sel_id_t id);

	//! The active selection changed.
	void activeChanged(sel_id_t id);

private:
	friend class ProjectSerialiser;
	QMap<sel_id_t, Selection> sels;
	sel_id_t nextid;
	sel_id_t act;
};