internal void ExpandNode(TreeNode node, int rowIndex, bool reExpand = false)
{
if (node == null)
{
return;
}
if (!reExpand)
{
CommitCurrentRow();
}
//After committing, corresponding node's row index will be changes. so recalculating row index.
rowIndex = this.treeGrid.ResolveToRowIndex(node);
if (!reExpand)
{
if (node.IsExpanded)
{
return;
}
var expandingArgs = this.treeGrid.RaiseNodeExpanding(new NodeExpandingEventArgs()
{
Node = node
});
if (expandingArgs.Cancel)
{
ChangeExpanderState(rowIndex, false);
return;
}
else
{
// While expanding node programmatically, need to change expander cell's Expanded state.
ChangeExpanderState(rowIndex, true);
}
}
if (reExpand)
{
node.SetDirtyOnExpandOrCollapse();
UpdateExpander(node);
}
var itemsCount = View.ExpandNode(node, reExpand);
if (!suspend && rowIndex != -1 && node.IsExpanded)
{
InsertRows(rowIndex, itemsCount);
}
if (!reExpand)
{
this.treeGrid.RaiseNodeExpanded(new NodeExpandedEventArgs()
{
Node = node
});
}
if (!suspend && treeGrid.isGridLoaded)
{
treeGrid.TreeGridPanel.UpdateScrollBars();
treeGrid.TreeGridColumnSizer.ChangeExpanderColumnWidth();
}
}