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AutoPropertyHandleT.hh
1 /*===========================================================================*\
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33 \*===========================================================================*/
34
35 /*===========================================================================*\
36 * *
37 * $Revision: 736 $ *
38 * $Date: 2012-10-08 09:30:49 +0200 (Mo, 08. Okt 2012) $ *
39 * *
40 \*===========================================================================*/
41
42 #ifndef OPENMESH_AutoPropertyHandleT_HH
43 #define OPENMESH_AutoPropertyHandleT_HH
44
45 //== INCLUDES =================================================================
46 #include <assert.h>
47 #include <string>
48
49 //== NAMESPACES ===============================================================
50
51 namespace OpenMesh {
52
53 //== CLASS DEFINITION =========================================================
54
55 template <class Mesh_, class PropertyHandle_>
56 class AutoPropertyHandleT : public PropertyHandle_
57 {
58 public:
59 typedef Mesh_ Mesh;
60 typedef PropertyHandle_ PropertyHandle;
61 typedef PropertyHandle Base;
62 typedef typename PropertyHandle::Value Value;
63 typedef AutoPropertyHandleT<Mesh, PropertyHandle>
64 Self;
65 protected:
66 Mesh* m_;
67 bool own_property_;//ref counting?
68
69 public:
70 AutoPropertyHandleT()
71 : m_(NULL), own_property_(false)
72 {}
73
74 AutoPropertyHandleT(const Self& _other)
75 : Base(_other.idx()), m_(_other.m_), own_property_(false)
76 {}
77
78 explicit AutoPropertyHandleT(Mesh& _m, const std::string& _pp_name = std::string())
79 { add_property(_m, _pp_name); }
80
81 AutoPropertyHandleT(Mesh& _m, PropertyHandle _pph)
82 : Base(_pph.idx()), m_(&_m), own_property_(false)
83 {}
84
85 ~AutoPropertyHandleT()
86 {
87 if (own_property_)
88 {
89 m_->remove_property(*this);
90 }
91 }
92
93 inline void add_property(Mesh& _m, const std::string& _pp_name = std::string())
94 {
95 assert(!is_valid());
96 m_ = &_m;
97 own_property_ = _pp_name.empty() || !m_->get_property_handle(*this, _pp_name);
98 if (own_property_)
99 {
100 m_->add_property(*this, _pp_name);
101 }
102 }
103
104 inline void remove_property()
105 {
106 assert(own_property_);//only the owner can delete the property
107 m_->remove_property(*this);
108 own_property_ = false;
109 invalidate();
110 }
111
112 template <class _Handle>
113 inline Value& operator [] (_Handle _hnd)
114 { return m_->property(*this, _hnd); }
115
116 template <class _Handle>
117 inline const Value& operator [] (_Handle _hnd) const
118 { return m_->property(*this, _hnd); }
119
120 inline bool own_property() const
121 { return own_property_; }
122
123 inline void free_property()
124 { own_property_ = false; }
125 };
126
127 //=============================================================================
128 } // namespace OpenMesh
129 //=============================================================================
130 #endif // OPENMESH_AutoPropertyHandleT_HH defined
131 //=============================================================================