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>
29 * Base class for a property controlled element
31 class PropertyBasedElement:
32 public SGPropertyChangeListener,
33 public SGWeakReferenced
36 PropertyBasedElement(SGPropertyNode* node);
37 virtual ~PropertyBasedElement();
40 * Remove the property listener of the element.
42 * You will need to call the appropriate methods (#childAdded,
43 * #childRemoved, #valueChanged) yourself to ensure the element still
44 * receives the needed events.
46 void removeListener();
49 * Destroys this element (removes node from property tree)
53 virtual void update(double delta_time_sec) = 0;
55 SGConstPropertyNode_ptr getProps() const;
56 SGPropertyNode_ptr getProps();
59 void set( const std::string& name,
62 setValue(_node->getNode(name, true), val);
66 T get( const std::string& name,
69 SGPropertyNode const* child = _node->getNode(name);
73 return getValue<T>(child);
76 // Unshadow what we have just hidden...
77 using SGWeakReferenced::get;
79 virtual void onDestroy() {};
83 SGPropertyNode_ptr _node;
87 typedef SGSharedPtr<PropertyBasedElement> PropertyBasedElementPtr;
88 typedef SGWeakPtr<PropertyBasedElement> PropertyBasedElementWeakPtr;
90 } // namespace simgear
92 #endif /* SG_PROPERTY_BASED_ELEMENT_HXX_ */