/// <summary>
/// 初始化container的选中Item策略
/// </summary>
/// <param name="container"></param>
/// <param name="selectedItemGetter"></param>
public static void InitSelecter(FrameworkElement container, Func <object> selectedItemGetter)
{
Func <ItemSelecter> selecterCreater;
_selecters.TryGetValue(container.GetType(), out selecterCreater);
if (selecterCreater != null)//container载入的时候定位到指定项
{
container.Loaded += (s, e) =>
{
ItemSelecter selecter = selecterCreater();
selecter.m_container = container;
selecter.SelectItem(container, selectedItemGetter());
};
container.TargetUpdated += (s, e) =>
{
if (!container.IsLoaded)
{
return;
}
ItemSelecter selecter = selecterCreater();
selecter.m_container = container;
selecter.SelectItem(container, selectedItemGetter());
};
}
}
protected override void OnAttached()
{
//使用委托取值，因为在OnAttached时SelectedItem还未赋值
ItemSelecter.InitSelecter(AssociatedObject, () => SelectedItem);
base.OnAttached();
}
