public void MoveLeft()
{
var parentNode = (AchievementCategoryTreeNode)tvwAchievementCategories.SelectedNode.Parent;
if (parentNode?.AchievementCategory is null)
{
return;
}
var selectedCategory = GetSelectedAchievementCategory();
dataManager.UpdateParent(selectedCategory, selectedCategory.Parent.Parent, selectedCategory.Parent.Location + 1);
var node = parentNode.Parent;
TreeNodeCollection nodes = null;
if (node != null && node.Nodes != null)
{
nodes = node.Nodes;
}
else
{
nodes = tvwAchievementCategories.Nodes;
}
nodes.Insert(parentNode.Index + 1, new AchievementCategoryTreeNode(selectedCategory)); // Need to add this to ensure correct location numbers
var categories = nodes.Cast <AchievementCategoryTreeNode>().Select(x => x.AchievementCategory).ToList();
dataManager.UpdateLocations(selectedCategory, categories);
var nextNode = (AchievementCategoryTreeNode)tvwAchievementCategories.SelectedNode.NextNode;
if (nextNode is not null)
{
tvwAchievementCategories.SelectedNode.Remove();
var prevNode = (AchievementCategoryTreeNode)nextNode.PrevNode;
if (prevNode?.AchievementCategory is not null)
{
var categories2 = prevNode.Parent.Nodes.Cast <AchievementCategoryTreeNode>().Select(x => x.AchievementCategory).ToList();
dataManager.UpdateLocations(prevNode.AchievementCategory, categories2);
}
else // removed item was 1st element so we use next element and adjust from a fictional 1st element
{
var categories2 = nextNode.Parent.Nodes.Cast <AchievementCategoryTreeNode>().Select(x => x.AchievementCategory).ToList();
dataManager.UpdateLocations(new AchievementCategory(), categories2);
}
}
RefreshTreeView();
}