lmms/include/TrackContainerView.h

/*
 * TrackContainerView.h - view-component for TrackContainer
 *
 * Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
 *
 * This file is part of LMMS - https://lmms.io
 *
 * This program 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.
 *
 * This program 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 this program (see COPYING); if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301 USA.
 *
 */


#ifndef TRACK_CONTAINER_VIEW_H
#define TRACK_CONTAINER_VIEW_H

#include <QtCore/QVector>
#include <QScrollArea>
#include <QWidget>
#include <QThread>

#include "Track.h"
#include "JournallingObject.h"
#include "InstrumentTrack.h"


class QVBoxLayout;
class TrackContainer;


class TrackContainerView : public QWidget, public ModelView,
						public JournallingObject,
						public SerializingObjectHook
{
	Q_OBJECT
public:
	TrackContainerView( TrackContainer* tc );
	virtual ~TrackContainerView();

	void saveSettings( QDomDocument & _doc, QDomElement & _this ) override;
	void loadSettings( const QDomElement & _this ) override;

	QScrollArea * contentWidget()
	{
		return m_scrollArea;
	}

	inline const MidiTime & currentPosition() const
	{
		return m_currentPosition;
	}

	virtual bool fixedTCOs() const
	{
		return false;
	}

	inline float pixelsPerBar() const
	{
		return m_ppb;
	}

	void setPixelsPerBar( int ppb );

	const TrackView * trackViewAt( const int _y ) const;

	virtual bool allowRubberband() const;

	inline bool rubberBandActive() const
	{
		return m_rubberBand->isEnabled() && m_rubberBand->isVisible();
	}

	inline QVector<selectableObject *> selectedObjects()
	{
		return m_rubberBand->selectedObjects();
	}


	TrackContainer* model()
	{
		return m_tc;
	}

	const TrackContainer* model() const
	{
		return m_tc;
	}

	const QList<TrackView *> & trackViews() const
	{
		return( m_trackViews );
	}

	void moveTrackView( TrackView * trackView, int indexTo );
	void moveTrackViewUp( TrackView * trackView );
	void moveTrackViewDown( TrackView * trackView );
	void scrollToTrackView( TrackView * _tv );

	// -- for usage by trackView only ---------------
	TrackView * addTrackView( TrackView * _tv );
	void removeTrackView( TrackView * _tv );
	// -------------------------------------------------------

	void clearAllTracks();

	QString nodeName() const override
	{
		return "trackcontainerview";
	}


	RubberBand *rubberBand() const;

public slots:
	void realignTracks();
	TrackView * createTrackView( Track * _t );
	void deleteTrackView( TrackView * _tv );

	void dropEvent( QDropEvent * _de ) override;
	void dragEnterEvent( QDragEnterEvent * _dee ) override;

	///
	/// \brief stopRubberBand
	/// Removes the rubber band from display when finished with.
	void stopRubberBand();


protected:
	static const int DEFAULT_PIXELS_PER_BAR = 16;

	void resizeEvent( QResizeEvent * ) override;

	MidiTime m_currentPosition;


private:
	enum Actions
	{
		AddTrack,
		RemoveTrack
	} ;

	class scrollArea : public QScrollArea
	{
	public:
		scrollArea( TrackContainerView* parent );
		virtual ~scrollArea();

	protected:
		void wheelEvent( QWheelEvent * _we ) override;

	private:
		TrackContainerView* m_trackContainerView;

	} ;
	friend class TrackContainerView::scrollArea;

	TrackContainer* m_tc;
	typedef QList<TrackView *> trackViewList;
	trackViewList m_trackViews;

	scrollArea * m_scrollArea;
	QVBoxLayout * m_scrollLayout;

	float m_ppb;

	RubberBand * m_rubberBand;



signals:
	void positionChanged( const MidiTime & _pos );


} ;

class InstrumentLoaderThread : public QThread
{
	Q_OBJECT
public:
	InstrumentLoaderThread( QObject *parent = 0, InstrumentTrack *it = 0,
							QString name = "" );

	void run() override;

private:
	InstrumentTrack *m_it;
	QString m_name;
	QThread *m_containerThread;
};

#endif