public static void EnsureActiveTabVisible(TabControl tabControl)
{
if (tabControl.ItemsSource == null)
{
return;
}
var ilist = (IList)tabControl.ItemsSource;
var containerGenerator = tabControl.ItemContainerGenerator;
var tabHeader = (TabItem)containerGenerator.ContainerFromItem(tabControl.SelectedItem);
if (!FlexStackPanel.GetIsOverflowed(tabHeader) || !tabHeader.IsSelected)
{
return;
}
var item = containerGenerator.ItemFromContainer(tabHeader);
ilist.Remove(item);
ilist.Insert(0, item);
tabControl.SelectedIndex = 0;
UpdateFirstItem(tabControl);
tabControl.InvalidateMeasure();
}
private static void UpdateFirstItem(TabControl tabControl)
{
var ilist = (IList)tabControl.ItemsSource;
if (ilist.Count == 0)
{
return;
}
var containerGenerator = tabControl.ItemContainerGenerator;
var tabItems = ilist.OfType <object>()
.Select(containerGenerator.ContainerFromItem)
.OfType <TabItem>()
.ToList();
foreach (var t in tabItems)
{
FlexStackPanel.SetShrinkOnOverflow(t, false);
}
FlexStackPanel.SetShrinkOnOverflow(tabItems.First(), true);
}
