/// <summary>Indicates that the <see cref="P:System.Windows.Controls.Panel.IsItemsHost" /> property value has changed.</summary>
/// <param name="oldIsItemsHost">The old property value.</param>
/// <param name="newIsItemsHost">The new property value.</param>
// Token: 0x060052E7 RID: 21223 RVA: 0x00171508 File Offset: 0x0016F708
protected virtual void OnIsItemsHostChanged(bool oldIsItemsHost, bool newIsItemsHost)
{
DependencyObject itemsOwnerInternal = ItemsControl.GetItemsOwnerInternal(this);
ItemsControl itemsControl = itemsOwnerInternal as ItemsControl;
Panel panel = null;
if (itemsControl != null)
{
IItemContainerGenerator itemContainerGenerator = itemsControl.ItemContainerGenerator;
if (itemContainerGenerator != null && itemContainerGenerator == itemContainerGenerator.GetItemContainerGeneratorForPanel(this))
{
panel = itemsControl.ItemsHost;
itemsControl.ItemsHost = this;
}
}
else
{
GroupItem groupItem = itemsOwnerInternal as GroupItem;
if (groupItem != null)
{
IItemContainerGenerator generator = groupItem.Generator;
if (generator != null && generator == generator.GetItemContainerGeneratorForPanel(this))
{
panel = groupItem.ItemsHost;
groupItem.ItemsHost = this;
}
}
}
if (panel != null && panel != this)
{
panel.VerifyBoundState();
}
this.VerifyBoundState();
}
/// <summary>
/// This method is invoked when the IsItemsHost property changes.
/// </summary>
/// <param name="oldIsItemsHost">The old value of the IsItemsHost property.</param>
/// <param name="newIsItemsHost">The new value of the IsItemsHost property.</param>
protected virtual void OnIsItemsHostChanged(bool oldIsItemsHost, bool newIsItemsHost)
{
// GetItemsOwner will check IsItemsHost first, so we don't have
// to check that IsItemsHost == true before calling it.
DependencyObject parent = ItemsControl.GetItemsOwnerInternal(this);
ItemsControl itemsControl = parent as ItemsControl;
Panel oldItemsHost = null;
if (itemsControl != null)
{
// ItemsHost should be the "root" element which has
// IsItemsHost = true on it. In the case of grouping,
// IsItemsHost is true on all panels which are generating
// content. Thus, we care only about the panel which
// is generating content for the ItemsControl.
IItemContainerGenerator generator = itemsControl.ItemContainerGenerator as IItemContainerGenerator;
if (generator != null && generator == generator.GetItemContainerGeneratorForPanel(this))
{
oldItemsHost = itemsControl.ItemsHost;
itemsControl.ItemsHost = this;
}
}
else
{
GroupItem groupItem = parent as GroupItem;
if (groupItem != null)
{
IItemContainerGenerator generator = groupItem.Generator as IItemContainerGenerator;
if (generator != null && generator == generator.GetItemContainerGeneratorForPanel(this))
{
oldItemsHost = groupItem.ItemsHost;
groupItem.ItemsHost = this;
}
}
}
if (oldItemsHost != null && oldItemsHost != this)
{
// when changing ItemsHost panels, disconnect the old one
oldItemsHost.VerifyBoundState();
}
VerifyBoundState();
}
