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//===============================================================
// vThislst.cpp - vThisList class functions - Windows
//
// Copyright (C) 1995,1996, 1997, 1998 Bruce E. Wampler
//
// This file is part of the V C++ GUI Framework, and is covered
// under the terms of the GNU Library General Public License,
// Version 2. This library has NO WARRANTY. See the source file
// vapp.cxx for more complete information about license terms.
//===============================================================
#include <v/vwin32.h> // for Win 32 stuff
#include <v/vthislst.h>
//======================>>> vThisList::vThisList <<<=======================
vThisList::vThisList()
{
// This will keep a list of this pointers accessed by some id
_cur = 0; // empty list
_list = 0;
}
//======================>>> vThisList::~vThisList <<<=======================
vThisList::~vThisList()
{
// This will keep a list of this pointers accessed by some id
thisList* next;
for (thisList* tl = _list ; tl != 0 ; tl = next)
{
next = tl->next; // get next one
delete tl;
}
}
//======================>>> vThisList::Add <<<=======================
void vThisList::Add(ThisId id, void* This)
{
// Add to list
thisList* newList = new thisList;
newList->id = id;
newList->thisPtr = This;
newList->next = _list;
_cur = _list = newList;
}
//======================>>> vThisList::Delete <<<=======================
void vThisList::Delete(ThisId id)
{
// delete from the list
thisList* next, *prev;
prev = 0;
for (thisList* tl = _list ; tl != 0 ; tl = next)
{
next = tl->next;
if (tl->id == id)
{
if (prev == 0)
_list = next;
else
prev->next = next;
delete tl;
_cur = _list; // keep _cur valid
return;
}
prev = tl;
}
}
//======================>>> vThisList::GetThis <<<=======================
void* vThisList::GetThis(ThisId id) VCONST
{
for (thisList* tl = _list ; tl != 0 ; tl = tl->next)
{
if (tl->id == id)
{
_cur = tl; // keep cur valid
return tl->thisPtr;
}
}
return 0;
}
//======================>>> vThisList::GetFirstThis <<<=======================
void* vThisList::GetFirstThis() VCONST
{
_cur = _list; // start at front
if (_cur)
return _cur->thisPtr;
else
return 0;
}
//======================>>> vThisList::GetNextThis <<<=======================
void* vThisList::GetNextThis() VCONST
{
if (_cur)
{
_cur = _cur->next; // point to next entry
if (_cur)
return _cur->thisPtr;
}
return 0;
}
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