#ifndef _WaveformManager_h
#define _WaveformManager_h

/*
 *	subtitleeditor -- a tool to create or edit subtitle
 *
 *	http://home.gna.org/subtitleeditor/
 *	https://gna.org/projects/subtitleeditor/
 *
 *	Copyright @ 2005-2009, kitone
 *
 *	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 3 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. If not, see <http://www.gnu.org/licenses/>.
 */

#include "waveform.h"

/*
 *
 */
class WaveformManager
{
public:
	
	/*
	 * Virtual destructor
	 */
	virtual ~WaveformManager() { /* nothing */ }

	/*
	 * Try to open a waveform file and show or hide the editor.
	 */
	virtual bool open_waveform(const Glib::ustring &uri) = 0;

	/*
	 * Try to generate a wavefrom from the media.
	 */
	virtual bool generate_waveform(const Glib::ustring &media_uri) = 0;

	/*
	 * Init the Waveform Editor and the WaveformRenderer with this wf
	 */
	virtual void set_waveform(const Glib::RefPtr<Waveform> &wf) = 0;

	/*
	 * Return the state of waveform. Cab be NULL.
	 */
	virtual bool has_waveform() = 0;

	/*
	 * Return a pointer to the waveform.
	 */
	virtual Glib::RefPtr<Waveform> get_waveform() = 0;

	/*
	 * A current waveform has changed.
	 */
	virtual sigc::signal<void>& signal_waveform_changed() = 0;

	/*
	 * Try to display the current subtitle at the center of the view.
	 */
	virtual void center_with_selected_subtitle() = 0;

	/*
	 * Increment the zoom
	 */
	virtual void zoom_in() = 0;

	/*
	 * Decrement the zoom
	 */
	virtual void zoom_out() = 0;

	/*
	 * Décrément completely the zoom
	 */
	virtual void zoom_all() = 0;

	/*
	 * Zooming on the current subtitle.
	 */
	virtual void zoom_selection() = 0;

};

#endif//_WaveformManager_h
