1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2003 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@via.ecp.fr>
8 * Olivier Teulière <ipkiss@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 #ifndef VAR_PERCENT_HPP
26 #define VAR_PERCENT_HPP
28 #include "variable.hpp"
29 #include "observer.hpp"
34 /// Percentage variable
35 class VarPercent: public Variable, public Subject<VarPercent>
38 VarPercent( intf_thread_t *pIntf ) :
39 Variable( pIntf ), m_value( 0 ), m_step( .05f ) {}
40 virtual ~VarPercent() { }
42 /// Get the variable type
43 virtual const string &getType() const { return m_type; }
45 /// Set the internal value
46 virtual void set( float percentage );
47 virtual float get() const { return m_value; }
49 /// Get the variable preferred step
50 virtual float getStep() const { return m_step; }
51 virtual void setStep( float val ) { m_step = val; }
53 /// Increment or decrement variable
54 void increment( int num ) { return set( m_value + num * m_step ); }
58 static const string m_type;
61 /// preferred step (for scrolling)