/// <summary>
/// 拖拽任务栏项
/// </summary>
/// <param name="p_src"></param>
/// <param name="e"></param>
internal void DoSwap(TaskbarItem p_src, PointerRoutedEventArgs e)
{
Point pt = e.GetCurrentPoint(null).Position;
TaskbarItem tgt = (from item in _taskbarPanel.Children.OfType <TaskbarItem>()
where item.ContainPoint(pt)
select item).FirstOrDefault();
if (tgt != null && tgt != p_src)
{
// 交换位置的最小移动控制
pt = e.GetCurrentPoint(tgt).Position;
double delta = tgt.ActualWidth / 2;
if ((pt.X < delta && pt.X > 20) ||
(pt.X > delta && pt.X < tgt.ActualWidth - 20))
{
try
{
// 动画效果好
Items.ItemsChanged -= OnItemsChanged;
int srcIndex = _taskbarPanel.Children.IndexOf(p_src);
int tgtIndex = _taskbarPanel.Children.IndexOf(tgt);
Items.RemoveAt(tgtIndex);
_taskbarPanel.Children.RemoveAt(tgtIndex);
Items.Insert(srcIndex, (Win)tgt.DataContext);
_taskbarPanel.Children.Insert(srcIndex, tgt);
}
finally
{
Items.ItemsChanged += OnItemsChanged;
}
}
}
}
protected override void OnRightTapped(RightTappedRoutedEventArgs e)
{
e.Handled = true;
_currentItem = this;
ShowMenu(e.GetPosition(SysVisual.RootContent));
}