private void TreeGrid_ItemsSourceChanged(object sender, TreeGridItemsSourceChangedEventArgs e)
{
if (ViewModel is not ProjectExplorerViewModel viewModel)
{
return;
}
if (TreeGrid == null)
{
return;
}
if (TreeGrid.View != null)
{
if (!_isfirsttime)
{
if (viewModel.LastSelected != null)
{
TreeGrid.ExpandAllNodes();
var rowIndex = this.TreeGrid.ResolveToRowIndex(viewModel.LastSelected);
if (rowIndex > -1)
{
var q = TreeGrid.ResolveToRowIndex(rowIndex - 1);
var columnIndex = this.TreeGrid.ResolveToStartColumnIndex();
this.TreeGrid.ScrollInView(new RowColumnIndex(q, columnIndex));
TreeGrid.SelectRows(q, q);
}
}
}
else
{
_isfirsttime = false;
}
}
}
//private void View_NodeCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
//{
// Trace.WriteLine("hello");
// //if (e.NewItems != null)
// //{
// // foreach (var nerd in e.NewItems)
// // {
// // Trace.WriteLine(nerd.ToString());
// // TreeGrid.ExpandNode((TreeNode)nerd);
// // }
// //}
// if (ViewModel is not ProjectExplorerViewModel viewModel)
// {
// return;
// }
// //var rootnodes = TreeGrid.View.Nodes.RootNodes;
// //foreach (var rootnode in rootnodes)
// //{
// // TreeGrid.ExpandNode(rootnode);
// //}
// Trace.WriteLine(e.Action.ToString());
//}
//protected override void OnViewModelPropertyChanged(PropertyChangedEventArgs e)
//{
// if (ViewModel is not ProjectExplorerViewModel viewModel)
// {
// return;
// }
// var name = e.PropertyName;
// switch (name)
// {
// case nameof(viewModel.IsTreeBeingEdited):
// if (viewModel.IsTreeBeingEdited)
// {
// TreeGrid.View.BeginInit(TreeViewRefreshMode.DeferRefresh);
// }
// else
// {
// TreeGrid.View.EndInit();
// }
// break;
// }
//}
#endregion Constructors
public void ExpandChildren()
{
if (ViewModel is not ProjectExplorerViewModel viewModel)
{
return;
}
var model = viewModel.SelectedItem;
var node = TreeGrid.View.Nodes.GetNode(model);
TreeGrid.ExpandAllNodes(node);
}
public void ExpandAll() => TreeGrid.ExpandAllNodes();
