private void onIsSelectedChanged(object sender, EventArgs e)
{
FileTreeItem item = (FileTreeItem)sender;
bool isCurrentSelected = item.IsSelected ?? false;
if (sender is FolderData)
{
//update all inner state
foreach (var folder in new FolderDataEnumerable((FolderData)sender)
.Reverse())
{
foreach (var file in folder.Files)
{
file.SetIsSelected(isCurrentSelected);
}
folder.UpdateFolderState(isCurrentSelected);
}
}
//update all upper folder state
foreach (var folder in new UpperFolderEnumerable(item))
{
folder.UpdateFolderState(isCurrentSelected);
}
}
public UpperFolderEnumerable(FileTreeItem source)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
this.source = source;
}