void TreeView_SelectionChanged(object sender, TVSelectionChangedEventArgs e)
{
if (disable_SelectionChanged)
{
return;
}
SelectionChanged?.Invoke(this, e);
}
void TreeView_SelectionChanged(object sender, TVSelectionChangedEventArgs e)
{
if (disable_SelectionChanged)
{
return;
}
if (SelectionChanged != null)
{
SelectionChanged(this, e);
}
}
void FileTreeView_SelectionChanged(object sender, TVSelectionChangedEventArgs e)
{
if (disableSelectionChangedEventCounter > 0)
{
return;
}
var nodes = ((IFileTreeView)sender).TreeView.TopLevelSelection.OfType <IFileTreeNodeData>().ToArray();
// Prevent a new empty tab from opening when closing the last tab
if (nodes.Length == 0 && ActiveTabContentImpl == null)
{
return;
}
// When the treeview selects nodes it will unselect everything and then select the new
// nodes. We're not interested in the empty selection since it shouldn't be recorded in
// the navigation history. If we get an empty selection, it could be because of the
// treeview or it's because the user unselected everything. Show the empty nodes with
// a slight delay so we can cancel it if the real selection immediately follows.
// Reproduce: Select a node, then collapse its parent to unselect the node and select
// the parent. Or open a new file.
if (nodes.Length != 0 || inEmptySelectionHack)
{
ignoreEmptySelection = true;
ShowNodes(nodes);
}
else
{
inEmptySelectionHack = true;
ignoreEmptySelection = false;
Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Send, new Action(() => {
var old = ignoreEmptySelection;
inEmptySelectionHack = false;
ignoreEmptySelection = false;
if (!old)
{
ShowNodes(nodes);
}
}));
}
}