void StoreStates(TreeListNode senderNode)
{
try
{
BaseTreeListTag senderNodeTag = senderNode.Tag as BaseTreeListTag; //not that using string senderNodeID = (senderNodeTag as BaseTreeListTag).GetDefaultID()
//is not a good idea, because it slows the process down by many catches if the data-row stored in the tag does not exist any more
if (senderNode.Expanded)
{
_expandedNodesIDs.Add(senderNodeTag.GetDefaultID());
}
if (senderNode.Selected)
{
_selectedNodesIDs.Add(senderNodeTag.GetDefaultID());
}
if (senderNode.Visible == false)
{
_hiddenNodesIDs.Add(senderNodeTag.GetDefaultID());
}
if (senderNode.Focused)
{
_focusedNodeID = senderNodeTag.GetDefaultID();
_focusedColumnIndex = senderNode.TreeList.Columns.IndexOf(senderNode.TreeList.FocusedColumn); //also store the focused column
_focusedNodeID_alternative = GetFocusedNodeID_alternative(senderNode);
}
}
catch (Exception e)
{
//do not jeopardise tree-list building, because node state cannot be restored (e.g. nodes point at deleted data-rows)
Tools.UserInfoHandler.RecordIgnoredException("StoreRestoreNodeStates.StoreStates", e);
}
}
private static void AddHiddenNode(ref List <string> hiddenNodes, TreeListNode node)
{
if (node.Visible || node.Tag == null)
{
return;
}
BaseTreeListTag tag = node.Tag as BaseTreeListTag; if (tag == null)
{
return;
}
hiddenNodes.AddUnique(tag.GetDefaultID(), true);
}
private static void SetHiddenNode(List <string> hiddenNodes, TreeListNode node)
{
if (node.Tag == null)
{
return;
}
BaseTreeListTag tag = node.Tag as BaseTreeListTag; if (tag == null)
{
return;
}
if (hiddenNodes.Contains(tag.GetDefaultID(), true))
{
node.Visible = false; // this assumes that ids do not change (which should actually be the case between country-close and reopen, and if not - not much harm done)
}
}
internal override bool Execute(TreeListNode senderNode)
{
BaseTreeListTag tag = senderNode.Tag as BaseTreeListTag;
return(_nodeIDs.Contains(tag.GetDefaultID()));
}