/*****************************************************************************
* var_percent.hpp
*****************************************************************************
* Copyright (C) 2003 the VideoLAN team
*
* Authors: Cyril Deguet <asmax@via.ecp.fr>
* Olivier Teulière <ipkiss@via.ecp.fr>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VAR_PERCENT_HPP
#define VAR_PERCENT_HPP
#include "variable.hpp"
#include "observer.hpp"
class VarPercent;
/// Percentage variable
class VarPercent: public Variable, public Subject<VarPercent>
{
public:
VarPercent( intf_thread_t *pIntf ) :
Variable( pIntf ), m_value( 0 ), m_step( .05f ) {}
virtual ~VarPercent() { }
/// Get the variable type
virtual const std::string &getType() const { return m_type; }
/// Set the internal value
virtual void set( float percentage );
virtual float get() const { return m_value; }
/// Get the variable preferred step
virtual float getStep() const { return m_step; }
virtual void setStep( float val ) { m_step = val; }
/// Increment or decrement variable
void increment( int num ) { return set( m_value + num * m_step ); }
private:
/// Variable type
static const std::string m_type;
/// Percent value
float m_value;
/// preferred step (for scrolling)
float m_step;
};
#endif
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