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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: An object that is used, when modifying the state of the document,
// to collect information about what objects changed and how they changed.
// This aggregate info is then passed to CMapDoc::UpdateObjects which performs
// post processing and view updates.
//
// $NoKeywords: $
//=============================================================================//
//-----------------------------------------------------------------------------
// Purpose: Iterates the list of updated objects.
//-----------------------------------------------------------------------------
POSITION CUpdateHint::GetHeadPosition(int nIndex)
{
return(m_NotifyList[nIndex].Objects.GetHeadPosition());
}
//-----------------------------------------------------------------------------
// Purpose: Iterates the list of updated objects.
//-----------------------------------------------------------------------------
CMapClass *CUpdateHint::GetNext(POSITION &pos)
{
return(m_NotifyList[nIndex].Objects.GetNext(pos));
}
//-----------------------------------------------------------------------------
// Purpose: Returns the notification code for this update.
//-----------------------------------------------------------------------------
int CUpdateHint::GetNotifyCode(void)
{
return(m_NotifyList[nIndex].nCode);
}
//-----------------------------------------------------------------------------
// Purpose: Returns the current update region.
//-----------------------------------------------------------------------------
BoundBox const &CUpdateHint::GetUpdateRegion(void)
{
return(m_UpdateRegion);
}
//-----------------------------------------------------------------------------
// Purpose: Prepares to update an object.
// Input : pObject - Object that will be updated.
//-----------------------------------------------------------------------------
void CUpdateHint::PreUpdateObject(CMapClass *pObject)
{
if (pObject != NULL)
{
CMapObjectList TempList;
TempList.AddTail(pObject);
PreUpdateObjects(&TempList);
}
else
{
PreUpdateObjects(NULL);
}
}
//-----------------------------------------------------------------------------
// Purpose: Prepares to update the list of objects.
// Input : pObjects - List of objects, NULL if none.
//-----------------------------------------------------------------------------
void CUpdateHint::PreUpdateObjects(CMapObjectList *pObjects)
{
if (pObjects != NULL)
{
POSITION pos = pObjects->GetHeadPosition();
while (pos != NULL)
{
CMapClass *pObject = pObjects->GetNext(pos);
if (pObject != NULL)
{
m_UpdateRegion.UpdateBounds(pObject);
}
}
}
}
//-----------------------------------------------------------------------------
// Purpose: Prepares to update an object.
// Input : pObject - Object that will be updated.
//-----------------------------------------------------------------------------
void CUpdateHint::PostUpdateObject(CMapClass *pObject, int nNotifyCode)
{
if (pObject != NULL)
{
CMapObjectList TempList;
TempList.AddTail(pObject);
PostUpdateObjects(&TempList, nNotifyCode);
}
else
{
PostUpdateObjects(NULL, nNotifyCode);
}
}
//-----------------------------------------------------------------------------
// Purpose: Prepares to update the list of objects.
// Input : pObjects - List of objects, NULL if none.
//-----------------------------------------------------------------------------
void CUpdateHint::PostUpdateObjects(CMapObjectList *pObjects, int nNotifyCode)
{
int nIndex = 0;
bool bFound = false;
while (!bFound && (nIndex < m_ListEntries))
{
if (m_NotifyList[nIndex].nCode == nNotifyCode)
{
bFound = true;
}
else
{
nIndex++;
}
}
if ((!bFound && (nIndex < MAX_NOTIFY_CODES))
{
if (nIndex < MAX_NOTIFY_CODES)
{
m_ListEntries++;
}
}
else
{
ASSERT(nIndex < MAX_NOTIFY_CODES);
return;
}
m_NotifyList[nIndex].Objects.AddTail(pObjects);
if (pObjects != NULL)
{
POSITION pos = pObjects->GetHeadPosition();
while (pos != NULL)
{
CMapClass *pObject = pObjects->GetNext(pos);
if (pObject != NULL)
{
m_UpdateRegion.UpdateBounds(pObject);
}
}
}
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void CUpdateHint::Reset(void)
{
m_Objects.RemoveAll();
m_UpdateRegion.ResetBounds();
}
//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
void CUpdateHint::UpdateBounds(BoundBox &bbox)
{
m_UpdateRegion.UpdateBounds(&bbox);
}
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