var_list.hpp

video linux conference

/*****************************************************************************
 * var_list.hpp
 *****************************************************************************
 * Copyright (C) 2003 VideoLAN
 * $Id: var_list.hpp 9641 2004-12-22 13:06:43Z gbazin $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *          Olivier Teuli鑢e <[e-mail]>
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#ifndef VAR_LIST_HPP
#define VAR_LIST_HPP

#include <list>

#include "variable.hpp"
#include "observer.hpp"
#include "ustring.hpp"
#include "var_percent.hpp"


/// List variable
class VarList: public Variable, public Subject<VarList>
{
    public:
        VarList( intf_thread_t *pIntf );
        virtual ~VarList();

        /// Get the variable type
        virtual const string &getType() const { return m_type; }

        /// Add a pointer on a string in the list
        virtual void add( const UStringPtr &rcString );

        /// Remove the selected elements from the list
        virtual void delSelected();

        /// Remove all the elements from the list
        virtual void clear();

        /// Get the number of items in the list
        int size() const { return m_list.size(); }

        /// Type of an element in the list
        struct Elem_t
        {
            UStringPtr m_cString;
            bool m_selected;
            bool m_playing;

            Elem_t( const UStringPtr &rcString, bool selected = false, bool
                    playing = false ):
                m_cString( rcString ), m_selected( selected ),
                m_playing( playing) {}
        };

        /// Iterators
        typedef list<Elem_t>::iterator Iterator;
        typedef list<Elem_t>::const_iterator ConstIterator;

        /// Beginning of the list
        Iterator begin() { return m_list.begin(); }
        ConstIterator begin() const { return m_list.begin(); }

        /// End of the list
        Iterator end() { return m_list.end(); }
        ConstIterator end() const { return m_list.end(); }

        /// Return an iterator on the n'th element of the list
        Iterator operator[]( int n );
        ConstIterator operator[]( int n ) const;

        /// Execute the action associated to this item
        virtual void action( Elem_t *pItem ) {}

        /// Get a reference on the position variable
        VarPercent &getPositionVar() const
            { return *((VarPercent*)m_cPosition.get()); }

        /// Get a counted pointer on the position variable
        const VariablePtr &getPositionVarPtr() const { return m_cPosition; }

    protected:
        /// List of elements
        list<Elem_t> m_list;

    private:
        /// Variable type
        static const string m_type;
        /// Position variable
        VariablePtr m_cPosition;
};


#endif