133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1997 - 1997
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//
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// File: ntree.h
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//
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//--------------------------------------------------------------------------
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//
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// NTREE.H
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//
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#if !defined(_NTREE_H_)
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#define _NTREE_H_
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#include <functional>
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#include "gelem.h"
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#include "glnkenum.h"
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class NTELEM;
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class NTREE;
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class NTELEM : public GLNKEL
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{
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public:
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// Internal class for chains (doubly-linked lists) of tree nodes
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typedef XCHN<NTELEM> CHN;
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// Sort helper "less" binary function class
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class SRTFNC : public binary_function<const NTELEM *, const NTELEM *, bool>
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{
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public:
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virtual bool operator () (const NTELEM * pa, const NTELEM * pb) const
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{ return pa->ICompare( pb ) < 0; }
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};
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static SRTFNC srtpntelem;
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public:
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NTELEM ();
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virtual ~ NTELEM ();
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// Accessor for chain of siblings
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CHN & ChnSib ()
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{ return (CHN &) Chn() ; }
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virtual INT EType () const
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{ return _pnteChild ? EGELM_BRANCH : EGELM_LEAF ; }
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// Adopt (link) a child
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void Adopt ( NTELEM * pnteChild, bool bSort = false ) ;
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// Disown (release) a child
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void Disown ( NTELEM * pnteChild ) ;
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// Become an orphan
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void Orphan () ;
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INT ChildCount () ;
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INT SiblingCount ();
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NTELEM * PnteChild ( INT index ) ;
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NTELEM * PnteParent ()
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{ return _pnteParent; }
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NTELEM * PnteChild ()
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{ return _pnteChild; }
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bool BIsChild ( NTELEM * pnte ) ;
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// Return the sort value of *this versus another COBJ
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virtual INT ICompare ( const NTELEM * pnteOther ) const = 0;
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void ReorderChildren ( SRTFNC & fSortRoutine = srtpntelem ) ;
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protected:
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NTELEM * _pnteParent; // Pointer to single parent (or NULL)
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NTELEM * _pnteChild; // Pointer to one child (or NULL)
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HIDE_UNSAFE(NTELEM);
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};
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class NTREE : public NTELEM
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{
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public:
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NTREE ();
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virtual ~ NTREE ();
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virtual INT EType () const
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{ return EGELM_TREE ; }
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HIDE_UNSAFE(NTREE);
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};
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template <class T, bool bAnchor>
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class NTENUM : public GLNKENUM<T,bAnchor>
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{
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public:
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NTENUM (const T & ntel, bool bIsAnchor = bAnchor, bool iDir = true)
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: GLNKENUM<T,bAnchor>( ntel, bIsAnchor, iDir )
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{}
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// Position to the next pointer
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T * PntelNext ()
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{ return (T *) GLNKENUM<T,bAnchor>::PlnkelNext() ; }
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// Return the current object pointer
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T * PntelCurrent()
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{ return (T *) _plnkelNext ; }
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// Set the enumerator to have a new base
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void Reset ( const T & ntel, int iDir = -1 )
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{ GLNKENUM<T,bAnchor>::Reset( ntel, iDir ) ; }
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};
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// Template for generating nested tree motion accessor class
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template<class T>
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class TWALKER
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{
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public:
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TWALKER ( T & t )
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: _pt(&t)
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{}
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void Reset ( T & t )
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{ _pt = &t; }
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T * PlnkchnPrev ()
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{ return PdynCast( _pt->Chn().PgelemPrev(), _pt ); }
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T * PlnkchnNext ()
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{ return PdynCast( _pt->Chn().PgelemNext(), _pt ); }
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T * Pparent ()
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{ return PdynCast( _pt->PnteParent(), _pt ); }
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T * Pchild ()
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{ return PdynCast( _pt->PnteChild(), _pt ); }
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protected:
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T * _pt;
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};
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#endif
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