private void KeepSelection(Action update)
{
var selectedNodes = new HashSet <object>(tree.SelectedNodes.Select(node => node.Tag).Where(tag => tag != null));
tree.SelectedNodes.Clear();
bool selectionIsDifferent = false;
update();
try
{
// Update nodes
_changing = true;
// Restore selection
var newSelectedNodes = new List <DarkTreeNode>();
foreach (DarkTreeNode node in CollectAllNodes(tree.Nodes))
{
if (node.Tag != null)
{
if (selectedNodes.Contains(node.Tag))
{
newSelectedNodes.Add(node);
}
}
}
tree.SelectNodes(newSelectedNodes);
selectionIsDifferent = newSelectedNodes.Count != selectedNodes.Count;
}
finally
{
_changing = false;
}
// See if anything changed in the selection
if (selectionIsDifferent)
{
SelectedWadObjectIdsChanged?.Invoke(this, EventArgs.Empty);
}
// Workaround update problems
Invalidate();
}
public WadTreeView()
{
InitializeComponent();
SetStyle(ControlStyles.OptimizedDoubleBuffer |
ControlStyles.ResizeRedraw |
ControlStyles.UserPaint, true);
tree.SelectedNodes.CollectionChanged += (s, e) => { if (!_changing)
{
SelectedWadObjectIdsChanged?.Invoke(this, EventArgs.Empty);
}
};
// Populate game version
foreach (var gameVersion in TRVersion.NativeVersions)
{
suggestedGameVersionComboBox.Items.Add(gameVersion);
}
}