private static void OnIsVisibleChanged(
BindableObject bindable,
object oldvalue,
object newvalue)
{
BindableToolbarItem item = bindable as BindableToolbarItem;
if (item != null && ((Element)item).get_Parent() == null || item == null)
{
return;
}
IList <ToolbarItem> items = ((Page)((Element)item).get_Parent()).get_ToolbarItems();
if ((bool)newvalue && !((ICollection <ToolbarItem>)items).Contains((ToolbarItem)item))
{
Device.BeginInvokeOnMainThread((Action)(() => ((ICollection <ToolbarItem>)items).Add((ToolbarItem)item)));
}
else
{
if ((bool)newvalue || !((ICollection <ToolbarItem>)items).Contains((ToolbarItem)item))
{
return;
}
Device.BeginInvokeOnMainThread((Action)(() => ((ICollection <ToolbarItem>)items).Remove((ToolbarItem)item)));
}
}
private void InitVisibility()
{
BindableToolbarItem.OnIsVisibleChanged((BindableObject)this, (object)false, (object)this.IsVisible);
}