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/*
Copyright (C) 2008 Paul Davis
Author: Sakari Bergen
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; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_element_importer_h__
#define __ardour_element_importer_h__
#include <string>
#include <utility>
#include <sigc++/signal.h>
#include <ardour/types.h>
using std::string;
class XMLTree;
namespace ARDOUR {
class Session;
/// Virtual interface class for element importers
class ElementImporter
{
public:
ElementImporter (XMLTree const & source, ARDOUR::Session & session);
virtual ~ElementImporter () {};
/** Returns the element name
* @return the name of the element
*/
virtual string get_name () const { return name; };
/** Gets a textual representation of the element
* @return a textual representation on this specific element
*/
virtual string get_info () const = 0;
/** Prepares to move element
* Should take care of all tasks that need to be done
* before moving the element. This includes prompting
* the user for more information if necessary.
*
* If the element can be moved, queued should be set to true.
*
* @return whther or not the element could be prepared for moving
*/
virtual bool prepare_move () = 0;
/** Cancels moving of element
* If the element has been set to be moved, this cancels the move.
* queued should be set to false.
*/
virtual void cancel_move () = 0;
/** Moves the element to the taget session
* In addition to actually adding the element to the session
* changing ids, renaming files etc. should be taken care of.
*/
virtual void move () = 0;
/// Check if element is broken. Cannot be moved if broken.
bool broken () { return _broken; }
/// Signal that requests for anew name
static sigc::signal <std::pair<bool, string>, string, string> Rename;
/// Signal for ok/cancel prompting
static sigc::signal <bool, string> Prompt;
protected:
/// Source XML-tree
XMLTree const & source;
/// Target session
ARDOUR::Session & session;
/// Ture if the element has been prepared and queued for importing
bool queued;
/// Name of element
string name;
/// The sample rate of the session from which we are importing
nframes_t sample_rate;
/// Converts smpte time to a string
string smpte_to_string(SMPTE::Time & time) const;
/// Converts samples so that times match the sessions sample rate
nframes_t rate_convert_samples (nframes_t samples) const;
/// Converts samples so that times match the sessions sample rate (for straight use in XML)
string rate_convert_samples (string const & samples) const;
/// Set element broken
void set_broken () { _broken = true; }
private:
bool _broken;
};
} // namespace ARDOUR
#endif
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