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DataIndex.H

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00051 
00052 #ifndef _DATAINDEX_H_
00053 #define _DATAINDEX_H_
00054 
00055 #ifndef WRAPPER
00056 class BoxLayout;
00057 
00058 #include <cstdlib>
00059 
00060 class DataIterator;
00061 class LayoutIterator;
00062 
00063 #endif /* WRAPPER */
00064 
00066 class LayoutIndex
00067 {
00068 public:
00070   LayoutIndex();
00071 
00072   ~LayoutIndex()
00073   {}
00074 
00075   // default copy and assign should be fine.
00076 
00078   bool operator == (const LayoutIndex& a_rhs) const;
00079 
00080   bool eq(const LayoutIndex& a_rhs) const
00081   {
00082     return *this == a_rhs;
00083   }
00084 
00086   bool operator != (const LayoutIndex& a_rhs) const
00087   {
00088     return !(*this == a_rhs);
00089   }
00090 
00092   bool isNull() const;
00093 
00094   // not user function. breaks design encapsulation. method not intended for
00095   // users. The alternative is to make this class a friend of BoxLayoutData<T>,
00096   // which implicitly makes this class templated, which makes no bloody sense.
00097   // The behaviour of this method is undefined for users.  bvs
00098   int intCode() const;
00099 
00100 
00101 private:
00102   friend class DataIterator;
00103   friend class LayoutIterator;
00104   friend class BoxLayout;
00105   friend class DataIndex;
00106 
00107   int        m_index;
00108   const int* m_layoutIntPtr;
00109 
00110   LayoutIndex(int        a_index,
00111               const int* a_layoutID)
00112     :
00113     m_index(a_index),
00114     m_layoutIntPtr(a_layoutID)
00115   {}
00116 };
00117 
00118 class DataIndex : public LayoutIndex
00119 {
00120 public:
00121   explicit DataIndex(const LayoutIndex& a_promotion)
00122     :
00123     LayoutIndex(a_promotion)
00124   {}
00125 
00126   DataIndex()
00127     :
00128     LayoutIndex()
00129   {}
00130 
00131   ~DataIndex()
00132   {}
00133 
00134 
00135 private:
00136   friend class LayoutIterator;
00137   friend class DataIterator;
00138   friend class BoxLayout;
00139   friend class Copier;
00140 
00141   DataIndex(int        a_index,
00142             const int* a_layoutID)
00143     :
00144     LayoutIndex(a_index, a_layoutID)
00145   {}
00146 };
00147 
00148 #ifndef WRAPPER
00149 inline LayoutIndex::LayoutIndex()
00150   :
00151   m_index(0),
00152   m_layoutIntPtr(NULL)
00153 {}
00154 
00155 inline bool LayoutIndex::operator == (const LayoutIndex& a_rhs) const
00156 {
00157   return (m_index == a_rhs.m_index);
00158 }
00159 
00160 inline int LayoutIndex::intCode() const
00161 {
00162   return m_index;
00163 }
00164 
00165 inline bool LayoutIndex::isNull() const
00166 {
00167   return m_layoutIntPtr == NULL;
00168 }
00169 #endif
00170 
00171 #endif

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