private void UpdateItems()
{
IEnumerable <object> items = ItemsSource as IEnumerable <object>;
if (items == null)
{
return;
}
if (TimelinePanel == null)
{
return;
}
TimelinePanel.Children.Clear();
if (HeaderContent != null)
{
TimelinePanel.AddElementToPanel(HeaderContent);
}
foreach (var item in items)
{
TimelinePanel.AddElementToPanel(CreateItem(item));
}
}
protected override void OnApplyTemplate()
{
if (TimelinePanel != null)
{
// clean up
TimelinePanel.Children.Clear();
}
TimelinePanel = this.GetTemplateChild(PartTimelinePanel) as TimelinePanel;
if (TimelinePanel != null)
{
TimelinePanel.Orientation = Orientation;
UpdateItems();
TimelinePanel.ItemIndex = CurrentItemIndex;
}
KeyDown += Timeline_KeyDown;
KeyUp += Timeline_KeyUp;
base.OnApplyTemplate();
}