/// <summary>
/// Called when the visual parent of this element changes.
/// </summary>
/// <param name="oldParent"></param>
protected internal override void OnVisualParentChanged(DependencyObject oldParent)
{
ItemsControl oldItemsControl = null;
if (VisualTreeHelper.GetParent(this) == null)
{
if (IsKeyboardFocusWithin)
{
// This ListBoxItem had focus but was removed from the tree.
// The normal behavior is for focus to become null, but we would rather that
// focus go to the parent ListBox.
// Use the oldParent to get a reference to the ListBox that this ListBoxItem used to be in.
// The oldParent's ItemsOwner should be the ListBox.
oldItemsControl = ItemsControl.GetItemsOwner(oldParent);
}
}
base.OnVisualParentChanged(oldParent);
// If earlier, we decided to set focus to the old parent ListBox, do it here
// after calling base so that the state for IsKeyboardFocusWithin is updated correctly.
if (oldItemsControl != null)
{
oldItemsControl.Focus();
}
}
/// <summary>Called when the visual parent of a list box item changes. </summary>
/// <param name="oldParent">The previous <see cref="P:System.Windows.FrameworkElement.Parent" /> property of the <see cref="T:System.Windows.Controls.ListBoxItem" />.</param>
// Token: 0x06005161 RID: 20833 RVA: 0x0016D16C File Offset: 0x0016B36C
protected internal override void OnVisualParentChanged(DependencyObject oldParent)
{
ItemsControl itemsControl = null;
if (VisualTreeHelper.GetParent(this) == null && base.IsKeyboardFocusWithin)
{
itemsControl = ItemsControl.GetItemsOwner(oldParent);
}
base.OnVisualParentChanged(oldParent);
if (itemsControl != null)
{
itemsControl.Focus();
}
}
