root/OpenSceneGraph/trunk/include/osg/ValueObject @ 13041

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1/* -*-c++-*- OpenSceneGraph - Copyright (C) 2011 Robert Osfield
2 *
3 * This library is open source and may be redistributed and/or modified under
4 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
5 * (at your option) any later version.  The full license is in LICENSE file
6 * included with this distribution, and on the openscenegraph.org website.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * OpenSceneGraph Public License for more details.
12*/
13
14#ifndef OSG_VALUEOBJECT
15#define OSG_VALUEOBJECT 1
16
17#include <osg/Object>
18#include <osg/UserDataContainer>
19
20namespace osg {
21
22// foward declare core OSG math classes
23class Vec2f;
24class Vec3f;
25class Vec4f;
26class Vec2d;
27class Vec3d;
28class Vec4d;
29class Quat;
30class Plane;
31class Matrixf;
32class Matrixd;
33
34class ValueObject : public Object
35{
36    public:
37
38        ValueObject() : Object(true) {}
39        ValueObject(const std::string& name) : Object(true) { setName(name); }
40        ValueObject(const ValueObject& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY): Object(rhs,copyop) {}
41
42        META_Object(osg, ValueObject)
43
44        class GetValueVisitor
45        {
46        public:
47            virtual void apply(bool value) {}
48            virtual void apply(char value) {}
49            virtual void apply(unsigned char value) {}
50            virtual void apply(short value) {}
51            virtual void apply(unsigned short value) {}
52            virtual void apply(int value) {}
53            virtual void apply(unsigned int value) {}
54            virtual void apply(float value) {}
55            virtual void apply(double value) {}
56            virtual void apply(const std::string& value) {}
57            virtual void apply(const osg::Vec2f& value) {}
58            virtual void apply(const osg::Vec3f& value) {}
59            virtual void apply(const osg::Vec4f& value) {}
60            virtual void apply(const osg::Vec2d& value) {}
61            virtual void apply(const osg::Vec3d& value) {}
62            virtual void apply(const osg::Vec4d& value) {}
63            virtual void apply(const osg::Quat& value) {}
64            virtual void apply(const osg::Plane& value) {}
65            virtual void apply(const osg::Matrixf& value) {}
66            virtual void apply(const osg::Matrixd& value) {}
67        };
68
69        class SetValueVisitor
70        {
71        public:
72            virtual void apply(bool& value) {}
73            virtual void apply(char& value) {}
74            virtual void apply(unsigned char& value) {}
75            virtual void apply(short& value) {}
76            virtual void apply(unsigned short& value) {}
77            virtual void apply(int& value) {}
78            virtual void apply(unsigned int& value) {}
79            virtual void apply(float& value) {}
80            virtual void apply(double& value) {}
81            virtual void apply(std::string& value) {}
82            virtual void apply(osg::Vec2f& value) {}
83            virtual void apply(osg::Vec3f& value) {}
84            virtual void apply(osg::Vec4f& value) {}
85            virtual void apply(osg::Vec2d& value) {}
86            virtual void apply(osg::Vec3d& value) {}
87            virtual void apply(osg::Vec4d& value) {}
88            virtual void apply(osg::Quat& value) {}
89            virtual void apply(osg::Plane& value) {}
90            virtual void apply(osg::Matrixf& value) {}
91            virtual void apply(osg::Matrixd& value) {}
92        };
93
94        virtual bool get(GetValueVisitor& gvv) const { return false; }
95        virtual bool set(SetValueVisitor& gvv) { return false; }
96    protected:
97        virtual ~ValueObject() {}
98};
99
100template< typename T >
101struct ValueObjectClassNameTrait
102{
103    static const char* className() { return "TemplateValueObject"; }
104};
105
106
107template< typename T >
108class TemplateValueObject : public ValueObject
109{
110    public:
111
112        TemplateValueObject():
113            ValueObject(),
114            _value() {}
115
116        TemplateValueObject(const std::string& name, const T& value) :
117            ValueObject(name),
118            _value(value) {}
119
120        TemplateValueObject(const TemplateValueObject& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY) :
121            ValueObject(rhs,copyop),
122            _value(rhs._value) {}
123
124        virtual Object* cloneType() const { return new TemplateValueObject(); }
125        virtual Object* clone(const CopyOp& copyop) const { return new TemplateValueObject(*this, copyop); }
126        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const TemplateValueObject*>(obj)!=NULL; }
127        virtual const char* libraryName() const { return "osg"; }
128        virtual const char* className() const { return ValueObjectClassNameTrait<T>::className(); }
129
130        void setValue(const T& value) { _value = value; }
131        const T& getValue() const { return _value; }
132
133        virtual bool get(GetValueVisitor& gvv) const { gvv.apply(_value); return true; }
134        virtual bool set(SetValueVisitor& svv) { svv.apply(_value); return true; }
135
136protected:
137
138        virtual ~TemplateValueObject() {}
139        static const char* s_TemplateValueObject_className;
140
141        T _value;
142};
143
144#define META_ValueObject(TYPE,NAME) \
145    template<> struct ValueObjectClassNameTrait<TYPE> { static const char* className() { return #NAME; } }; \
146    typedef TemplateValueObject<TYPE> NAME;
147
148META_ValueObject(std::string, StringValueObject)
149META_ValueObject(bool, BoolValueObject)
150META_ValueObject(char, CharValueObject)
151META_ValueObject(unsigned char, UCharValueObject)
152META_ValueObject(short, ShortValueObject)
153META_ValueObject(unsigned short, UShortValueObject)
154META_ValueObject(int, IntValueObject)
155META_ValueObject(unsigned int, UIntValueObject)
156META_ValueObject(float, FloatValueObject)
157META_ValueObject(double, DoubleValueObject)
158META_ValueObject(Vec2f, Vec2fValueObject)
159META_ValueObject(Vec3f, Vec3fValueObject)
160META_ValueObject(Vec4f, Vec4fValueObject)
161META_ValueObject(Vec2d, Vec2dValueObject)
162META_ValueObject(Vec3d, Vec3dValueObject)
163META_ValueObject(Vec4d, Vec4dValueObject)
164META_ValueObject(Quat, QuatValueObject)
165META_ValueObject(Plane, PlaneValueObject)
166META_ValueObject(Matrixf, MatrixfValueObject)
167META_ValueObject(Matrixd, MatrixdValueObject)
168
169/** provide implementation of osg::Object::getUserValue(..) template*/
170template<typename T>
171bool osg::Object::getUserValue(const std::string& name, T& value) const
172{
173    typedef TemplateValueObject<T> UserValueObject;
174
175    const osg::UserDataContainer* udc = dynamic_cast<const osg::UserDataContainer*>(this);
176    if (!udc) udc = _userDataContainer;
177
178    const UserValueObject* uvo = udc ? dynamic_cast<const UserValueObject*>(udc->getUserObject(name)) : 0;
179    if (uvo)
180    {
181        value = uvo->getValue();
182        return true;
183    }
184    else
185    {
186        return false;
187    }
188}
189
190/** provide implementation of osg::Object::setUserValue(..) template.*/
191template<typename T>
192void osg::Object::setUserValue(const std::string& name, const T& value)
193{
194    typedef TemplateValueObject<T> UserValueObject;
195
196    osg::UserDataContainer* udc = dynamic_cast<osg::UserDataContainer*>(this);
197    if (!udc)
198    {
199        getOrCreateUserDataContainer();
200        udc = _userDataContainer;
201    }
202
203    unsigned int i = udc->getUserObjectIndex(name);
204    if (i<udc->getNumUserObjects()) udc->setUserObject(i, new UserValueObject(name,value));
205    else udc->addUserObject(new UserValueObject(name,value));
206}
207
208}
209#endif
210
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