private void CollapseAll(Expander selectedExpander)
{
_isManualCollapseOrExpand = true;
try
{
// Collapse all expanders.
foreach (var expander in _listBox.GetVisualDescendants().OfType <Expander>())
{
expander.IsExpanded = false;
expander.Focusable = true;
}
// Clear list box selection
_listBox.SelectedItem = null;
// Move focus to expander which contained the selected property
selectedExpander?.Focus();
selectedExpander?.BringIntoView();
}
finally
{
_isManualCollapseOrExpand = false;
}
}
private void Collapse(Expander expander)
{
if (expander == null)
{
return;
}
_isManualCollapseOrExpand = true;
try
{
expander.IsExpanded = false;
expander.Focusable = true;
if (_listBox != null)
{
_listBox.SelectedItem = null;
}
expander.Focus();
expander.BringIntoView();
}
finally
{
_isManualCollapseOrExpand = false;
}
}
private void Expander_Expanded(object sender, RoutedEventArgs e)
{
Expander exp = sender as Expander;
exp.BringIntoView();
}