private static void OnDataGridContextChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
GroupLevelIndicatorPane self = sender as GroupLevelIndicatorPane;
if (self != null)
{
DataGridContext dataGridContext = e.OldValue as DataGridContext;
//unregister to the old contexts Collection GroupDescriptions Changed event
if (dataGridContext != null)
{
CollectionChangedEventManager.RemoveListener(dataGridContext.Items.GroupDescriptions, self);
}
dataGridContext = e.NewValue as DataGridContext;
//register to the new contexts Collection GroupDescriptions Changed event
if (dataGridContext != null)
{
CollectionChangedEventManager.AddListener(dataGridContext.Items.GroupDescriptions, self);
self.PrepareDefaultStyleKey(dataGridContext.DataGridControl.GetView());
}
self.InvalidateMeasure();
}
}
private static void OnDataItemChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
GroupLevelIndicatorPane self = sender as GroupLevelIndicatorPane;
if ((self != null) && (e.NewValue != CustomItemContainerGenerator.NotSet))
{
self.InvalidateMeasure();
}
}
