internal void UpdateRowData(TreeGridNodeReference newNodeReference, bool isCurrent, bool isSelected)
{
if (this.nodeReference != null)
{
this.nodeReference.Dispose();
}
this.ignoreIsExpandedChanges = true;
try
{
// NOTE: Since we keep this reference we must Clone it.
this.nodeReference = newNodeReference.Clone();
this.IsCurrent = isCurrent;
this.IsSelected = isSelected;
this.ExpansionLevel = newNodeReference.ExpansionLevel;
this.IsExpanded = newNodeReference.IsExpanded;
this.RowData = newNodeReference.Item;
}
finally
{
this.ignoreIsExpandedChanges = false;
}
}
public void SetCurrentNode(TreeGridNodeReference node)
{
if (this.currentNode != null)
{
if (this.currentRow != null)
{
this.currentRow.IsCurrent = false;
this.currentRow = null;
}
this.currentNode.Dispose();
}
if (node != null)
{
this.currentNode = node.Clone();
this.currentRow = this.visibleRows.FirstOrDefault(r => r.NodeReference.Equals(this.currentNode));
if (this.currentRow != null)
{
this.currentRow.IsCurrent = true;
}
}
else
{
this.currentNode = null;
}
RaiseCurrentItemChanged();
}
void AddNodeToSelection(TreeGridNodeReference node)
{
using (new SelectionChangeSuppressor(this))
{
// Must clone the node (creating the active reference)...
var selectedNode = node.Clone();
// ...and then be SURE that the clone is used for both the key AND the value. The value is what we
// dispose when this node is removed from the selection, and the key must not get disposed while it
// is used as a key (because, again, disposal alters the value semantics).
this.selectedNodeReferences.Add(selectedNode, selectedNode);
this.SelectedItemCount = this.selectedNodeReferences.Count;
this.changeSuppressor.RegisterSelectionChange();
}
}
