protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
this.AllowDrop = true;
this.Content = outerGrid;
if (this.ItemsPanel != null)
{
this.panel.ItemsPanel = this.ItemsPanel;
}
ICompositeViewEvents containerEvents = null;
bool isDefault = false;
this.Loaded += (s, eventArgs) =>
{
isDefault = this.IsDefaultContainer;
selectedSpacerIndex = addAtEndMarker;
DependencyObject parent = VisualTreeHelper.GetParent(this);
while (null != parent && !typeof(ICompositeViewEvents).IsAssignableFrom(parent.GetType()))
{
parent = VisualTreeHelper.GetParent(parent);
}
containerEvents = parent as ICompositeViewEvents;
if (null != containerEvents)
{
if (isDefault)
{
containerEvents.RegisterDefaultCompositeView(this);
}
else
{
containerEvents.RegisterCompositeView(this);
}
}
if (this.Items != null)
{
//UnRegistering because of 137896: Inside tab control multiple Loaded events happen without an Unloaded event.
this.Items.CollectionChanged -= new NotifyCollectionChangedEventHandler(OnCollectionChanged);
this.Items.CollectionChanged += new NotifyCollectionChangedEventHandler(OnCollectionChanged);
}
if (populateOnLoad)
{
this.PopulateContent();
}
};
this.Unloaded += (s, eventArgs) =>
{
if (null != containerEvents)
{
if (isDefault)
{
containerEvents.UnregisterDefaultCompositeView(this);
}
else
{
containerEvents.UnregisterCompositeView(this);
}
}
if (this.Items != null)
{
this.Items.CollectionChanged -= new NotifyCollectionChangedEventHandler(OnCollectionChanged);
}
populateOnLoad = true;
};
}
protected override void OnInitialized(EventArgs e)
{
base.OnInitialized(e);
this.AllowDrop = true;
this.Content = containerGrid;
ICompositeViewEvents containerEvents = null;
bool isDefault = false;
this.Loaded += (s, eventArgs) =>
{
isDefault = this.IsDefaultContainer;
DependencyObject parent = VisualTreeHelper.GetParent(this);
while (null != parent && !typeof(ICompositeViewEvents).IsAssignableFrom(parent.GetType()))
{
parent = VisualTreeHelper.GetParent(parent);
}
containerEvents = parent as ICompositeViewEvents;
if (null != containerEvents)
{
if (isDefault)
{
containerEvents.RegisterDefaultCompositeView(this);
}
else
{
containerEvents.RegisterCompositeView(this);
}
}
this.shouldSetFocus = true;
if (this.AutoWrapInSequenceEnabled)
{
// spacer and placer holder
this.spacerHelper = new SpacerHelper(this);
}
};
this.Unloaded += (s, eventArgs) =>
{
if (null != containerEvents)
{
if (isDefault)
{
containerEvents.UnregisterDefaultCompositeView(this);
}
else
{
containerEvents.UnregisterCompositeView(this);
}
}
this.shouldSetFocus = false;
if (this.AutoWrapInSequenceEnabled)
{
if (this.spacerHelper != null)
{
this.spacerHelper.Unload();
this.spacerHelper = null;
}
}
};
}