private void TreeFunctions_KeyDown(object sender, KeyEventArgs e)
{
if (string.IsNullOrEmpty(TbFilterForFunctions.Text))
{
return;
}
if (e.Key != Key.F3)
{
return;
}
var index = Keyboard.Modifiers != ModifierKeys.Shift
? TreeFunctions.SelectedIndex + 1
: TreeFunctions.SelectedIndex - 1;
var source = ((IEnumerable <TreeViewItemData>)TreeFunctions.ItemsSource).ToList();
while (index < source.Count && index > 0)
{
if (string.IsNullOrEmpty(source[index].StringToUnderscore))
{
if (Keyboard.Modifiers != ModifierKeys.Shift)
{
index++;
}
else
{
index--;
}
continue;
}
if (TreeFunctions.SelectedItem != source[index])
{
TreeFunctions.SelectedItem = source[index];
TreeFunctions.ScrollIntoView(source[index]);
var item = TreeFunctions.ItemContainerGenerator.ContainerFromItem(source[index]) as ListBoxItem;
item?.Focus();
}
break;
}
}
private void CheckTreeFilter([NotNull] ItemsControl tree, string filter)
{
var source = tree.ItemsSource as IEnumerable <TreeViewItemData>;
if (source == null)
{
return;
}
var treeViewItemsData = source as TreeViewItemData[] ?? source.ToArray();
var firstmatch = treeViewItemsData.FirstOrDefault(x => x.Text.ToLowerInvariant().Contains(filter.ToLowerInvariant()));
if (firstmatch != null)
{
TreeFunctions.ScrollIntoView(firstmatch);
TreeFunctions.SelectedItem = firstmatch;
}
foreach (var treeViewItemData in treeViewItemsData)
{
treeViewItemData.StringToUnderscore =
treeViewItemData.Text.ToLowerInvariant().Contains(filter.ToLowerInvariant()) ? filter : "";
}
}
