1 // A group of 2D Canvas elements
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 CANVAS_GROUP_HXX_
20 #define CANVAS_GROUP_HXX_
22 #include "CanvasElement.hxx"
31 typedef std::map<std::string, ElementFactory> ElementFactories;
37 static const std::string TYPE_NAME;
39 typedef std::list< std::pair< const SGPropertyNode*,
44 Group( const CanvasWeakPtr& canvas,
45 const SGPropertyNode_ptr& node,
46 const Style& parent_style = Style(),
47 Element* parent = 0 );
50 ElementPtr createChild( const std::string& type,
51 const std::string& id = "" );
52 ElementPtr getChild(const SGPropertyNode* node);
53 ElementPtr getChild(const std::string& id);
54 ElementPtr getOrCreateChild( const std::string& type,
55 const std::string& id );
58 boost::shared_ptr<T> createChild(const std::string& id = "")
60 return boost::dynamic_pointer_cast<T>( createChild(T::TYPE_NAME, id) );
64 boost::shared_ptr<T> getChild(const SGPropertyNode* node)
66 return boost::dynamic_pointer_cast<T>( getChild(node) );
70 boost::shared_ptr<T> getChild(const std::string& id)
72 return boost::dynamic_pointer_cast<T>( getChild(id) );
76 boost::shared_ptr<T> getOrCreateChild(const std::string& id)
79 boost::dynamic_pointer_cast<T>( getOrCreateChild(T::TYPE_NAME, id) );
83 * Get first child with given id (breadth-first search)
85 * @param id Id (value if property node 'id') of element
87 ElementPtr getElementById(const std::string& id);
89 virtual void clearEventListener();
91 virtual void update(double dt);
93 virtual bool traverse(EventVisitor& visitor);
95 virtual bool setStyle( const SGPropertyNode* child,
96 const StyleInfo* style_info = 0 );
98 virtual osg::BoundingBox getTransformedBounds(const osg::Matrix& m) const;
102 static ElementFactories _child_factories;
105 * Overload in derived classes to allow for more/other types of elements
108 virtual ElementFactory getChildFactory(const std::string& type) const;
110 virtual void childAdded(SGPropertyNode * child);
111 virtual void childRemoved(SGPropertyNode * child);
112 virtual void childChanged(SGPropertyNode * child);
114 void handleZIndexChanged(ElementPtr child, int z_index = 0);
116 ElementPtr getChildByIndex(size_t index) const;
117 ElementPtr findChild( const SGPropertyNode* node,
118 const std::string& id ) const;
121 } // namespace canvas
122 } // namespace simgear
124 #endif /* CANVAS_GROUP_HXX_ */