async void OnFocusChanged(object?sender, FocusManager.FocusChangedEventArgs e)
{
if (e.Current == null)
{
return;
}
if (DrawerViewGroup.FindDescendantByID(e.Current.ID) != null)
{
await OpenAsync(true);
}
else if (ContentViewGroup.FindDescendantByID(e.Current.ID) != null)
{
await CloseAsync(true);
}
}
Task ResizeDrawerAsync(double start, double end)
{
var tcs = new TaskCompletionSource <bool>();
var animation = new Animation(v =>
{
var r = start + ((end - start) * v);
ContentViewGroup.UpdatePosition(new Point(r, 0));
DrawerViewGroup.UpdateSize(new Size(r, Size.Height));
}, easing: Easing.Linear);
animation.Commit(this, "ResizeDrawer", length: 200, finished: (l, c) =>
{
ContentViewGroup.UpdatePosition(new Point(end, 0));
DrawerViewGroup.UpdateSize(new Size(end, Size.Height));
tcs.SetResult(true);
});
return(tcs.Task);
}
