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ebf59d4426
This allows to copy a property list and then selectively replace various properties. e.g. ``` PropertyList plist (region->properties ()); plist.add (Properties::length, len); plist.remove (Properties::start); ``` See also8b0ab38675and97f0fac7d5This also fixes the issue referenced in8c83149c4c
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
/*
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* Copyright (C) 2010-2015 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2010 Carl Hetherington <carl@carlh.net>
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* Copyright (C) 2015-2017 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __pbd_property_list_h__
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#define __pbd_property_list_h__
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#include <map>
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#include "pbd/libpbd_visibility.h"
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#include "pbd/property_basics.h"
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class XMLNode;
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namespace PBD {
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/** A list of properties, mapped using their ID */
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class LIBPBD_API PropertyList : public std::map<PropertyID, PropertyBase*>
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{
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public:
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PropertyList ();
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PropertyList (PropertyList const &);
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virtual ~PropertyList();
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void get_changes_as_xml (XMLNode*);
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void invert ();
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/** Add a property (of some kind) to the list.
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*
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* Used when
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* constructing PropertyLists that describe a change/operation.
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*/
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bool add (PropertyBase* prop);
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/** Construct a new Property List
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*
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* Code that is constructing a property list for use
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* in setting the state of an object uses this.
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*
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* Defined below, once we have Property<T>
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*/
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template<typename T, typename V> bool add (PropertyDescriptor<T> pid, const V& v);
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template<typename T> bool remove (PropertyDescriptor<T> pid);
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protected:
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bool _property_owner;
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};
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/** Persistent Property List
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*
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* A variant of PropertyList that does not delete its
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* property list in its destructor. Objects with their
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* own Properties store them in an OwnedPropertyList
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* to avoid having them deleted at the wrong time.
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*/
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class LIBPBD_API OwnedPropertyList : public PropertyList
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{
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public:
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OwnedPropertyList();
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/** Add a property to the List
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*
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* Classes that own property lists use this to add their
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* property members to their plists. Note that it takes
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* a reference argument rather than a pointer like
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* one of the add() methods in PropertyList.
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*/
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bool add (PropertyBase& p);
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};
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}
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#endif /* __pbd_property_list_h__ */
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