1 // Base class for elements of property controlled subsystems
3 // Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
5 // This library is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU Library General Public
7 // License as published by the Free Software Foundation; either
8 // version 2 of the License, or (at your option) any later version.
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // Library General Public License for more details.
15 // You should have received a copy of the GNU Library General Public
16 // License along with this library; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
19 #ifndef SG_PROPERTY_BASED_ELEMENT_HXX_
20 #define SG_PROPERTY_BASED_ELEMENT_HXX_
22 #include <simgear/props/props.hxx>
23 #include <simgear/structure/SGWeakReferenced.hxx>
25 #include <boost/call_traits.hpp>
31 * Base class for a property controlled element
33 class PropertyBasedElement:
34 public SGPropertyChangeListener,
35 public SGWeakReferenced
38 PropertyBasedElement(SGPropertyNode* node);
39 virtual ~PropertyBasedElement();
42 * Remove the property listener of the element.
44 * You will need to call the appropriate methods (#childAdded,
45 * #childRemoved, #valueChanged) yourself to ensure the element still
46 * receives the needed events.
48 void removeListener();
51 * Destroys this element (removes node from property tree)
55 virtual void update(double delta_time_sec) = 0;
57 SGConstPropertyNode_ptr getProps() const;
58 SGPropertyNode_ptr getProps();
61 void set( const std::string& name,
62 typename boost::call_traits<T>::param_type val )
64 setValue(_node->getNode(name, true), val);
68 T get( const std::string& name,
69 typename boost::call_traits<T>::param_type def = T() )
71 SGPropertyNode const* child = _node->getNode(name);
75 return getValue<T>(child);
78 // Unshadow what we have just hidden...
79 using SGWeakReferenced::get;
81 virtual void onDestroy() {};
85 SGPropertyNode_ptr _node;
89 typedef SGSharedPtr<PropertyBasedElement> PropertyBasedElementPtr;
90 typedef SGWeakPtr<PropertyBasedElement> PropertyBasedElementWeakPtr;
92 } // namespace simgear
94 #endif /* SG_PROPERTY_BASED_ELEMENT_HXX_ */