ControlArray.hxx

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/*
 * Copyright (c) 2004 MUSIC TECHNOLOGY GROUP (MTG)
 *                         UNIVERSITAT POMPEU FABRA
 *
 *
 * 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  02111-1307  USA
 *
 */

#ifndef _ControlArray_hxx_
#define _ControlArray_hxx_

#include "Assert.hxx"
#include <vector>
#include <list>
#include <string>
#include <sstream>

namespace CLAM
{

class Processing;

template <class ControlT>
class ControlArray
{
        typedef std::vector<ControlT *> Controls;
        Controls mControls;

public:
        ControlArray() { mControls.resize(0); }
        ControlArray(int size, const std::string &name, Processing* parent) {
                mControls.resize(0);
                Resize(size,name,parent);
        }
        ControlArray(int size, const std::list<std::string> &names,
                        Processing* parent)
        {
                mControls.resize(0);
                Resize(size, names, parent);
        }
        ~ControlArray() { Clear(); }

        ControlT       &operator[](int i)        { return *mControls[i]; }
        const ControlT &operator[](int i) const  { return *mControls[i]; }

        void Resize(int size, const std::string &name, Processing* parent);
        void Resize(int size, const std::list<std::string>& names, Processing* parent);

        void Append(int size, const std::string &names, Processing* parent);
        void Append(int size, const std::list<std::string>& names, Processing* parent);

        int Size() const { return mControls.size(); }

        void Clear() { Shrink(0); }

protected:
        void Shrink(int size);
};
        
template <class ControlT>
void ControlArray<ControlT>::Resize(int size, const std::string &name,
                Processing* parent)
{
        int previousSize = mControls.size();
        if(size < previousSize) 
        {
                Shrink(size);
                return;
        }
        mControls.resize(size);
        for (int i = previousSize; i<size; i++) {
                std::stringstream str;
                str << name << "_" << i;
                mControls[i] = new ControlT(str.str(), parent); 
        }
        
}

template <class ControlT>
void ControlArray<ControlT>::Resize(int size,
                const std::list<std::string>& names, Processing* parent)
{
        int previousSize = mControls.size();
        if (size < previousSize) 
        {
                Shrink(size);
                return;
        }
        CLAM_ASSERT(size - previousSize <= int(names.size()),
                "ControlArray::Resize: error, not enough labels provided");
        mControls.resize(size);
        std::list<std::string>::const_iterator name = names.begin();
        for (int i = previousSize; i<size; i++, name++)
                mControls[i] = new ControlT(*name, parent);     
}

template <class ControlT>
void ControlArray<ControlT>::Append(int count, 
                const std::string &name, Processing* parent)
{
        Resize(Size() + count, name, parent);
}

template <class ControlT>
void ControlArray<ControlT>::Append(int count, 
                const std::list<std::string>& names, Processing* parent)
{
        Resize(Size() + count, names, parent);
}


template <class ControlT>
void ControlArray<ControlT>::Shrink(int size)
{
        int previousSize = mControls.size();
        if (size == previousSize) return;
        CLAM_ASSERT(size < previousSize,
                "ControlArray::Cannot Shrink a ControlArray to a larger size");
        for (int i = previousSize-1; i >= size; i--)
                delete mControls[i];    
        mControls.resize(size);
}

}; //namespace CLAM

#endif

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