private List <bool> GetVisibleDescendantExpandStates(int rowIndex)
{
int i = GetPrimaryId(rowIndex);
if (!VisibleDescendantExpandStates.ContainsKey(i))
{
VisibleDescendantExpandStates.Add(i, new List <bool>());
}
return(VisibleDescendantExpandStates[i]);
}
private void ExpandNode(int rowIndex, bool refresh, bool resizeNodeCell, bool expandDescendents)
{
Node n = GetNode(rowIndex);
if (n.Indent > this.MaxIndentLevels)
{
return;
}
if (n.HasChildren)
{
if (refresh)
{
this.grid.TableControl.BeginUpdate();
}
try
{
int pos = GetPosition(rowIndex);
IList list = (n.ChildList == null) ? this.dataSource.GetChildList(n.Position, n.SiblingList, n.ParentNode) : n.ChildList;
PopulateIndexer(pos + 1, list, n.Indent + 1, n);
n.IsExpanded = true;
this.grid.TableControl.Model.ResetVolatileData();
if (resizeNodeCell)
{
this.grid.TableControl.Model.ColWidths.ResizeToFit(GridRangeInfo.Cells(rowIndex, TREECOLUMN, rowIndex + list.Count, TREECOLUMN), GridResizeToFitOptions.NoShrinkSize);
}
if (expandDescendents)
{
ExpandDescendants(rowIndex);
int id = GetPrimaryId(rowIndex);
if (VisibleDescendantExpandStates.ContainsKey(id))
{
VisibleDescendantExpandStates.Remove(id);
}
}
}
catch { }
finally
{
if (refresh)
{
this.grid.TableControl.EndUpdate();
this.grid.TableControl.Refresh();
}
}
}
}
private void CollapseNode(int rowIndex, bool saveExpandStates)
{
Node n = GetNode(rowIndex);
if (n.IsExpanded && n.HasChildren)
{
if (saveExpandStates)
{
int id = GetPrimaryId(rowIndex);
if (VisibleDescendantExpandStates.ContainsKey(id))
{
VisibleDescendantExpandStates[id] = QueryVisibleDescendantsExpandStates(rowIndex);
}
else
{
VisibleDescendantExpandStates.Add(id, QueryVisibleDescendantsExpandStates(rowIndex));
}
}
int i = rowIndex + 1;
int pos = GetPosition(i);
int rowCount = this.grid.TableControl.Model.RowCount;
if (i <= rowCount)
{
Node next = GetNode(i);
this.grid.TableControl.Model.ResetVolatileData();
while (next.Indent > n.Indent && i <= rowCount)
{
this.rowIndexer.RemoveAt(pos);
rowCount--;
if (i <= rowCount)
{
next = GetNode(i);
}
}
}
n.IsExpanded = false;
this.grid.TableControl.Refresh();
this.grid.Table.Reload();
}
}
/// <summary>
/// Collapses all the nodes in the grid.
/// </summary>
public void CollapseAll()
{
this.grid.TableControl.BeginUpdate();
try
{
int rowIndex = rowOffSet;
Node n = GetNode(rowIndex);
IList list = n.SiblingList;
CollapseNode(rowIndex);
if (list != null)
{
for (int i = 1; i < list.Count; ++i)
{
CollapseNode(rowIndex + i);
}
}
}
catch { }
finally
{
this.grid.TableControl.EndUpdate();
}
VisibleDescendantExpandStates.Clear();
}
