public void DragEnd(object sender, DragTreeViewItemAdvEventArgs e)
{
e.Cancel = false;
TreeViewItemAdv drop = e.TargetDropItem as TreeViewItemAdv;
if (drag != null && drop != null && drag.ParentItemsControl == drop.ParentItemsControl)
{
e.Cancel = true;
}
}
private void ServersTreeView_OnDragEnd(object sender, DragTreeViewItemAdvEventArgs e)
{
//Fix weird selections
ServersTreeView.ClearSelection();
var draggingItems = new List <ServerTreeViewModel>();
foreach (var draggingItem in e.DraggingItems)
{
if (draggingItem.Header is ServerTreeViewModel st)
{
draggingItems.Add(st);
}
else
{
goto Skip;
}
}
var types = new HashSet <ServerTreeViewType>(draggingItems.Select(items => items.Type));
if (types.Count == 1)
{
var type = types.First();
switch (type)
{
case ServerTreeViewType.Subtag:
e.Cancel = !(e.TargetDropItem is TreeViewAdv);
return;
case ServerTreeViewType.Group:
//移到相同订阅组上会被吃掉
if (e.DropIndex < 0)
{
goto Skip;
}
//属于同样的订阅
if (e.TargetDropItem is TreeViewItemAdv treeViewItem)
{
if (treeViewItem.Header is ServerTreeViewModel st && st.Type == ServerTreeViewType.Subtag)
{
if (draggingItems.All(draggingItem => draggingItem.Parent == st))
{
e.Cancel = false;
return;
}
}
}
break;
case ServerTreeViewType.Server:
//属于同一个订阅
var subs = new HashSet <string>();
foreach (var draggingItem in draggingItems)
{
var parent = draggingItem.Parent;
while (parent.Parent != null)
{
parent = parent.Parent;
}
if (parent is ServerTreeViewModel parentModel)
{
subs.Add(parentModel.Name);
continue;
}
goto Skip;
}
if (subs.Count != 1)
{
goto Skip;
}
var sub = subs.First();
//且 目标为群组或原版的订阅连接
if (e.TargetDropItem is TreeViewItemAdv treeViewItemAdv)
{
if (treeViewItemAdv.Header is ServerTreeViewModel st)
{
switch (st.Type)
{
case ServerTreeViewType.Subtag:
{
//移到相同订阅组上会被吃掉
if (e.DropIndex < 0)
{
goto Skip;
}
//原版的订阅连接
if (draggingItems.All(draggingItem => draggingItem.Parent == st))
{
e.Cancel = false;
return;
}
break;
}
case ServerTreeViewType.Group:
{
//相同订阅组
if (st.Parent is ServerTreeViewModel targetParent && sub == targetParent.Name)
{
//同一个组
var parents = new HashSet <IVirtualTree>(draggingItems.Select(items => items.Parent));
if (parents.Count != 1)
{
goto Skip;
}
var parent = parents.First();
if (e.DropIndex < 0 && parent == st)
{
goto Skip;
}
foreach (var draggingItem in draggingItems)
{
var first = st.Nodes.FirstOrDefault();
draggingItem.Server.Group = first != null ? first.Server.Group :
st.Name != I18NUtil.GetAppStringValue(@"EmptyGroup") ? st.Name :
string.Empty;
draggingItem.Parent = st;
}
e.Cancel = false;
return;
}
break;
}
}
}
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
Skip:
e.Cancel = true;
}
void TreeViewAdv_DragStart(object sender, DragTreeViewItemAdvEventArgs e)
{
AddLog("DragStarted from ( " + (e.OriginalSource as TreeViewAdv).Name + " )");
}
void TreeViewAdv1_DragEnd(object sender, DragTreeViewItemAdvEventArgs e)
{
AddLog("DragEnd ( " + (e.OriginalSource as TreeViewAdv).Name + " )");
}
public void DragStart(object sender, DragTreeViewItemAdvEventArgs e)
{
drag = (sender as TreeViewAdv).SelectedContainer;
}