internal void OpenSubMenu()
{
if (Items.Count == 0 || IsSubmenuOpen)
{
return;
}
if (ParentMi != null)
{
// 关闭同级已打开的菜单
if (Kit.IsPhoneUI && ParentMi.IsSubmenuOpen)
{
// phone模式关闭上级窗口
ParentMi.IsSubmenuOpen = false;
}
else
{
Mi last = ParentMi._lastSelected;
if (last != null && last != this)
{
last.CloseSubMenu();
last.IsSelected = false;
}
}
ParentMi._lastSelected = this;
}
else if (Kit.IsPhoneUI && Owner.IsContextMenu)
{
Owner.Close();
}
IsSelected = true;
IsSubmenuOpen = true;
}
static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Mi item = (Mi)d;
bool newValue = (bool)e.NewValue;
if (!newValue)
{
item.IsMouseOver = false;
item.ChangeState(MenuItemState.Normal);
}
else
{
item.ChangeState(MenuItemState.Pressed);
}
if ((bool)e.OldValue)
{
if (item.IsSubmenuOpen)
{
item.CloseSubMenu();
}
}
// 冒泡处理，只处理转为选择状态的
if (newValue)
{
item.Owner?.OnItemIsSelected(item);
}
}
/// <summary>
/// 递归关闭所有子窗口
/// </summary>
internal void CloseSubMenu()
{
if (_lastSelected != null)
{
_lastSelected.CloseSubMenu();
_lastSelected = null;
}
if (IsSubmenuOpen)
{
IsSubmenuOpen = false;
}
}
