// Updates selected content
private void UpdateSelectedContent()
{
if (base.SelectedIndex < 0)
{
this.SelectedContent = null;
}
else
{
BackstageTabItem selectedTabItem = this.GetSelectedTabItem();
if (selectedTabItem != null)
{
this.SelectedContent = selectedTabItem.Content;
if (((selectedTabItem.ContentTemplate != null) || (selectedTabItem.ContentTemplateSelector != null)) || (selectedTabItem.ContentStringFormat != null))
{
this.SelectedContentTemplate = selectedTabItem.ContentTemplate;
this.SelectedContentTemplateSelector = selectedTabItem.ContentTemplateSelector;
this.SelectedContentStringFormat = selectedTabItem.ContentStringFormat;
}
else
{
this.SelectedContentTemplate = this.ContentTemplate;
this.SelectedContentTemplateSelector = this.ContentTemplateSelector;
this.SelectedContentStringFormat = this.ContentStringFormat;
}
UpdateLayout();
}
}
}
// Finds next tab item
private BackstageTabItem FindNextTabItem(int startIndex, int direction)
{
if (direction != 0)
{
int index = startIndex;
for (int i = 0; i < base.Items.Count; i++)
{
index += direction;
if (index >= base.Items.Count)
{
index = 0;
}
else if (index < 0)
{
index = base.Items.Count - 1;
}
BackstageTabItem item2 = base.ItemContainerGenerator.ContainerFromIndex(index) as BackstageTabItem;
if (((item2 != null) && item2.IsEnabled) && (item2.Visibility == Visibility.Visible))
{
return(item2);
}
}
}
return(null);
}
/// <summary>
/// Updates the current selection when an item in the System.Windows.Controls.Primitives.Selector has changed
/// </summary>
/// <param name="e">The event data.</param>
protected override void OnItemsChanged(NotifyCollectionChangedEventArgs e)
{
base.OnItemsChanged(e);
if ((e.Action == NotifyCollectionChangedAction.Remove) && (base.SelectedIndex == -1))
{
int startIndex = e.OldStartingIndex + 1;
if (startIndex > base.Items.Count)
{
startIndex = 0;
}
BackstageTabItem item = FindNextTabItem(startIndex, -1);
if (item != null)
{
item.IsSelected = true;
}
}
}
// Gets selected ribbon tab item
BackstageTabItem GetSelectedTabItem()
{
object selectedItem = base.SelectedItem;
if (selectedItem == null)
{
return(null);
}
BackstageTabItem item = selectedItem as BackstageTabItem;
if (item == null)
{
item = FindNextTabItem(base.SelectedIndex, 1);
base.SelectedItem = item;
}
return(item);
}
// Handles IsSelected changed
private static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BackstageTabItem container = (BackstageTabItem)d;
bool newValue = (bool)e.NewValue;
if (newValue)
{
BackstageTabControl backstage = container.Parent as BackstageTabControl;
if ((backstage != null) && (backstage.SelectedItem != container))
{
if (backstage.SelectedItem is BackstageTabItem)
{
(backstage.SelectedItem as BackstageTabItem).IsSelected = false;
}
backstage.SelectedItem = container;
}
container.OnSelected(new RoutedEventArgs(Selector.SelectedEvent, container));
}
else
{
container.OnUnselected(new RoutedEventArgs(Selector.UnselectedEvent, container));
}
}
