/// <summary>Handle a node collapsing</summary>
protected override void OnNodeCollapsing(CollapsingEventArgs e)
{
base.OnNodeCollapsing(e);
var root = e.Node;
var elem = e.Node.Tag as XElement;
root.Nodes.Clear();
root.VirtualNodes = elem.HasElements;
}
protected virtual void OnNodeCollapsing(CollapsingEventArgs e)
{
if (this.NodeCollapsing != null)
{
NodeCollapsing(this, e);
}
}
protected internal virtual bool CollapseNode(TreeGridNode node)
{
if (node.IsExpanded)
{
CollapsingEventArgs exp = new CollapsingEventArgs(node);
this.OnNodeCollapsing(exp);
if (!exp.Cancel)
{
this.LockVerticalScrollBarUpdate(true);
this.SuspendLayout();
_inExpandCollapse = true;
node.IsExpanded = false;
foreach (TreeGridNode childNode in node.Nodes)
{
Debug.Assert(childNode.RowIndex != -1, "Row is NOT in the grid.");
this.UnSiteNode(childNode);
}
CollapsedEventArgs exped = new CollapsedEventArgs(node);
this.OnNodeCollapsed(exped);
//TODO: Convert this to a specific NodeCell property
_inExpandCollapse = false;
this.LockVerticalScrollBarUpdate(false);
this.ResumeLayout(true);
this.InvalidateCell(node.Cells[0]);
}
return !exp.Cancel;
}
else
{
// row isn't expanded, so we didn't do anything.
return false;
}
}
/// <summary>
/// Collapses the node.
/// </summary>
/// <param name="node">The OutlookGridRow node.</param>
/// <returns></returns>
public bool CollapseNode(OutlookGridRow node)
{
if (!node.Collapsed)
{
CollapsingEventArgs exp = new CollapsingEventArgs(node);
OnNodeCollapsing(exp);
if (!exp.Cancel)
{
node.SetNodeCollapse(true);
CollapsedEventArgs exped = new CollapsedEventArgs(node);
OnNodeCollapsed(exped);
}
return !exp.Cancel;
}
else
{
// row isn't expanded, so we didn't do anything.
return false;
}
}
