/* === S Y N F I G ========================================================= */
/*! \file progresscallback.h
** \brief ProgressCallback
**
** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
** Copyright (c) 2010 Carlos López
**
** This package 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 package 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.
** \endlegal
*/
/* ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __SYNFIG_PROGRESSCALLBACK_H
#define __SYNFIG_PROGRESSCALLBACK_H
/* === H E A D E R S ======================================================= */
#include "string.h"
/* === M A C R O S ========================================================= */
/* === C L A S S E S & S T R U C T S ======================================= */
namespace synfig {
/*! \class ProgressCallback
** \todo writeme
*/
class ProgressCallback
{
public:
virtual ~ProgressCallback() { }
virtual bool task(const String &/*task*/) { return true; }
virtual bool error(const String &/*task*/) { return true; }
virtual bool warning(const String &/*task*/) { return true; }
virtual bool amount_complete(int /*current*/, int /*total*/) { return true; }
virtual bool valid() const { return true; }
};
typedef ProgressCallback ProgressManager;
/*! \class SuperCallback
** \todo writeme
*/
class SuperCallback : public ProgressCallback
{
ProgressCallback *cb;
int start,end,tot;
int w;
public:
SuperCallback(): cb(), start(), end(), tot(), w() { }
SuperCallback(ProgressCallback *cb,int start_, int end_, int total):
cb(cb),start(start_),end(end_),tot(total),w(end-start)
{
//make sure we don't "inherit" if our subcallback is invalid
if(!cb || !cb->valid())
cb = NULL;
}
virtual bool task(const String &task) { if(cb)return cb->task(task); return true; }
virtual bool error(const String &task) { if(cb)return cb->error(task); return true; }
virtual bool warning(const String &task) { if(cb)return cb->warning(task); return true; }
virtual bool amount_complete(int cur, int total) { if(cb)return cb->amount_complete(start+cur*w/total,tot); return true; }
virtual bool valid() const { return cb != 0; }
};
}; // END of namespace synfig
/* === E N D =============================================================== */
#endif