internal bool InsertAfter(GeneratorNode insert)
{
if (insert == null)
{
throw new DataGridInternalException("GeneratorNode is null.");
}
var insertionCount = default(int);
var chainLength = default(int);
var insertLast = GeneratorNodeHelper.EvaluateChain(insert, out insertionCount, out chainLength);
var nextNode = m_state.Node.Next;
if (nextNode != null)
{
nextNode.Previous = insertLast;
}
insertLast.Next = nextNode;
insert.Previous = m_state.Node;
m_state.Node.Next = insert;
// Move the current node to the last node inserted
if (!this.MoveToNextBy(chainLength))
{
throw new DataGridInternalException("Unable to move to the requested generator index.");
}
return(true);
}
public bool InsertAfter(GeneratorNode insert)
{
if (insert == null)
{
throw new DataGridInternalException();
}
int insertionCount;
int chainLength;
GeneratorNode insertLast = GeneratorNodeHelper.EvaluateChain(insert, out insertionCount, out chainLength);
if (m_currentNode.Next != null)
{
m_currentNode.Next.Previous = insertLast;
}
insertLast.Next = m_currentNode.Next;
insert.Previous = m_currentNode;
m_currentNode.Next = insert;
// Move the current node to the last node inserted
if (!this.MoveToNextBy(chainLength))
{
throw new DataGridInternalException();
}
return(true);
}
internal bool InsertBefore(GeneratorNode insert)
{
if (insert == null)
{
throw new DataGridInternalException("GeneratorNode is null");
}
var insertionCount = default(int);
var chainLength = default(int);
var insertLast = GeneratorNodeHelper.EvaluateChain(insert, out insertionCount, out chainLength);
var previousNode = m_state.Node.Previous;
if (previousNode != null)
{
previousNode.Next = insert;
}
insert.Previous = previousNode;
m_state.Node.Previous = insertLast;
insertLast.Next = m_state.Node;
var parentGroup = insert.Parent as GroupGeneratorNode;
if (parentGroup != null)
{
if (parentGroup.Child == m_state.Node)
{
parentGroup.Child = insert;
}
}
// Move the current to the first item inserted.
// No need to update the indexes since they will still be with the correct value.
m_state.Node = insert;
this.EnsureState();
return(true);
}
public bool InsertBefore(GeneratorNode insert)
{
if (insert == null)
{
throw new DataGridInternalException();
}
int insertionCount;
int chainLength;
GeneratorNode insertLast = GeneratorNodeHelper.EvaluateChain(insert, out insertionCount, out chainLength);
GeneratorNode previous = m_currentNode.Previous;
if (previous != null)
{
previous.Next = insert;
}
insert.Previous = previous;
m_currentNode.Previous = insertLast;
insertLast.Next = m_currentNode;
GroupGeneratorNode parentGroup = insert.Parent as GroupGeneratorNode;
if (parentGroup != null)
{
if (parentGroup.Child == m_currentNode)
{
parentGroup.Child = insert;
}
}
// Move the current to the first item inserted.
// No need to change m_index, m_sourceDataIndex since they will still be with the correct value.
m_currentNode = insert;
return(true);
}
