1 // Interface for 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_ELEMENT_HXX_
20 #define CANVAS_ELEMENT_HXX_
22 #include <simgear/canvas/canvas_fwd.hxx>
23 #include <simgear/canvas/CanvasEvent.hxx>
24 #include <simgear/props/props.hxx>
25 #include <simgear/misc/stdint.hxx> // for uint32_t
26 #include <simgear/nasal/cppbind/Ghost.hxx>
28 #include <osg/BoundingBox>
29 #include <osg/MatrixTransform>
31 #include <boost/bind.hpp>
32 #include <boost/function.hpp>
45 public SGPropertyChangeListener
48 typedef boost::function<void(const SGPropertyNode*)> StyleSetter;
49 typedef std::map<std::string, StyleSetter> StyleSetters;
52 * Remove the property listener of the element.
54 * You will need to call the appropriate methods (#childAdded,
55 * #childRemoved, #valueChanged) yourself to ensure the element still
56 * receives the needed events.
58 void removeListener();
63 virtual ~Element() = 0;
66 * Called every frame to update internal state
68 * @param dt Frame time in seconds
70 virtual void update(double dt);
72 naRef addEventListener(const nasal::CallContext& ctx);
74 SGConstPropertyNode_ptr getProps() const;
75 SGPropertyNode_ptr getProps();
77 virtual bool accept(EventVisitor& visitor);
78 virtual bool ascend(EventVisitor& visitor);
79 virtual bool traverse(EventVisitor& visitor);
81 virtual bool hitBound(const osg::Vec2f& pos) const;
84 osg::ref_ptr<osg::MatrixTransform> getMatrixTransform();
86 virtual void childAdded( SGPropertyNode * parent,
87 SGPropertyNode * child );
88 virtual void childRemoved( SGPropertyNode * parent,
89 SGPropertyNode * child );
90 virtual void valueChanged(SGPropertyNode * child);
93 * Write the given bounding box to the property tree
95 void setBoundingBox(const osg::BoundingBox& bb);
101 LAST_ATTRIBUTE = 0x0001
113 CanvasWeakPtr _canvas;
115 uint32_t _attributes_dirty;
117 bool _transform_dirty;
118 osg::ref_ptr<osg::MatrixTransform> _transform;
119 std::vector<TransformType> _transform_types;
121 SGPropertyNode_ptr _node;
123 StyleSetters _style_setters;
124 std::vector<SGPropertyNode_ptr> _bounding_box;
126 typedef std::vector<EventListenerPtr> Listener;
127 typedef std::map<Event::Type, Listener> ListenerMap;
129 ListenerMap _listener;
131 Element( const CanvasWeakPtr& canvas,
132 const SGPropertyNode_ptr& node,
133 const Style& parent_style,
136 template<typename T, class C1, class C2>
138 addStyle(const std::string& name, void (C1::*setter)(T), C2 instance)
140 return _style_setters[ name ] =
141 bindStyleSetter<T>(name, setter, instance);
144 template<typename T1, typename T2, class C1, class C2>
146 addStyle(const std::string& name, void (C1::*setter)(T2), C2 instance)
148 return _style_setters[ name ] =
149 bindStyleSetter<T1>(name, setter, instance);
152 template<class C1, class C2>
154 addStyle( const std::string& name,
155 void (C1::*setter)(const std::string&),
158 return _style_setters[ name ] =
159 bindStyleSetter<const char*>(name, setter, instance);
162 template<typename T1, typename T2, class C1, class C2>
164 bindStyleSetter( const std::string& name,
165 void (C1::*setter)(T2),
168 return boost::bind(setter, instance, boost::bind(&getValue<T1>, _1));
171 void callListeners(canvas::Event& event);
173 virtual void childAdded(SGPropertyNode * child) {}
174 virtual void childRemoved(SGPropertyNode * child){}
175 virtual void childChanged(SGPropertyNode * child){}
177 void setDrawable(osg::Drawable* drawable);
180 bool setStyle(const SGPropertyNode* child);
184 osg::ref_ptr<osg::Drawable> _drawable;
186 Element(const Element&);// = delete
189 } // namespace canvas
190 } // namespace simgear
192 #endif /* CANVAS_ELEMENT_HXX_ */