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hammer/updatehint.cpp

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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);
+}