private void Mi_Tapped(object sender, TappedRoutedEventArgs e)
{
e.Handled = true;
TabStripItem mi = sender as TabStripItem;
if (mi != null)
{
SelectItem(mi);
SelectionChanged?.Invoke(this, mi.DataContext.ToString());
}
}
private void Render()
{
pnlItems.Children.Clear();
if (Items != null)
{
foreach (var item in Items)
{
TabStripItem mi = new TabStripItem();
mi.DataContext = item;
pnlItems.Children.Add(mi);
mi.Tapped += Mi_Tapped;
}
RenderPositionButtons();
}
}
private void SelectItem(TabStripItem mi)
{
var selectedItems = pnlItems.Children.OfType <TabStripItem>().Where(p => p.IsSelected == true).ToList();
if (selectedItems.Count() > 0)
{
foreach (var item in selectedItems)
{
if (item != mi)
{
item.IsSelected = false;
}
}
}
if (mi != null)
{
ScalarKeyFrameAnimation fadeIn = null;
if (selectedItems.Count == 0)
{
fadeIn = _compositor.CreateScalarKeyFrameAnimation(null, 1, 250, 0);
}
mi.IsSelected = true;
var x = GetIndicatorPositionForItem(mi);
if (fadeIn != null)
{
_barIndicatorVisual.Offset = new Vector3(x.ToFloat(), 0, 0);
_barIndicatorVisual.StartAnimation("Opacity", fadeIn);
}
else
{
var animation = _compositor.CreateVector3KeyFrameAnimation(null, new Vector3(x.ToFloat(), 0, 0), 250);
_barIndicatorVisual.StartAnimation("Offset", animation);
}
}
else
{
var fadeOut = _compositor.CreateScalarKeyFrameAnimation(null, 0, 250, 0);
_barIndicatorVisual.StartAnimation("Opacity", fadeOut);
}
}
private Double GetIndicatorPositionForItem(TabStripItem item)
{
var position = item.RelativePosition(pnlItems);
return(position.X - IndicatorWidth / 2 + item.ActualWidth / 2);
}
