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/*
* --- GSMP-COPYRIGHT-NOTE-BEGIN ---
*
* This copyright note is auto-generated by ./scripts/Create-CopyPatch.
* Please add additional copyright information _after_ the line containing
* the GSMP-COPYRIGHT-NOTE-END tag. Otherwise it might get removed by
* the ./scripts/Create-CopyPatch script. Do not edit this copyright text!
*
* GSMP: utility/include/Attribute.hh
* General Sound Manipulation Program is Copyright (C) 2000 - 2004
* Valentin Ziegler and René Rebe
*
* 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; version 2. A copy of the GNU General
* Public License can be found in the file LICENSE.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANT-
* ABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
* Public License for more details.
*
* --- GSMP-COPYRIGHT-NOTE-END ---
*/
/* Short Description:
* A attribute / property implementation.
*/
#ifndef UTILITY__ATTRIBUTE_HH__
#define UTILITY__ATTRIBUTE_HH__
#include <sigc++/signal.h>
namespace Utility
{
// the public base of all attributes just holding the value and
// a Get() method
template <class T>
class PublicAttribute {
public:
const T& Get () const {
return value;
};
protected:
T value;
};
// the real Attribute with control about signalling ...
template <class T, bool do_signal = true>
class Attribute : public PublicAttribute<T>
{
public:
const T& Set (const T& n_value) { this->value = n_value; };
};
template <class T>
class Attribute <T, true> : public PublicAttribute<T>
{
public:
sigc::signal <void, const T&> changed;
const T& Set (const T& n_value) {
this->value = n_value;
changed.emit (this->value);
};
};
} // end namespace Utility
#endif // UTILITY__ATTRIBUTE_HH__
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