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AutoPropertyHandleT.hh
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35 /*===========================================================================*\
36  * *
37  * $Revision: 736 $ *
38  * $Date: 2012-10-08 09:30:49 +0200 (Mo, 08 Okt 2012) $ *
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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;
64  Self;
65 protected:
66  Mesh* m_;
67  bool own_property_;//ref counting?
68 
69 public:
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 
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 //=============================================================================

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