public override DataItem LoadData(XElement element, UndoRedoManager undoRedo)
{
var item = new GraphCollectionItem(this, undoRedo);
item.X = TryParseFloat(element, MetaNS + "X");
item.Y = TryParseFloat(element, MetaNS + "Y");
item.GUID = element.Attribute("GUID")?.Value?.ToString();
item.Comment = element.Attribute(MetaNS + "Comment")?.Value?.ToString();
foreach (var el in element.Elements())
{
var prev = el.PreviousNode as XComment;
if (prev != null)
{
var comment = new CommentDefinition().LoadData(prev, undoRedo);
item.Children.Add(comment);
}
var cdef = ChildDefinitions.FirstOrDefault(e => e.Name == el.Name);
var child = cdef.LoadData(el, undoRedo);
item.Children.Add(child);
if (item.Children.Count == MaxCount)
{
break;
}
}
if (element.LastNode is XComment)
{
var comment = new CommentDefinition().LoadData(element.LastNode as XComment, undoRedo);
item.Children.Add(comment);
}
foreach (var att in Attributes)
{
var el = element.Attribute(att.Name);
DataItem attItem = null;
if (el != null)
{
attItem = att.LoadData(new XElement(el.Name, el.Value.ToString()), undoRedo);
}
else
{
attItem = att.CreateData(undoRedo);
}
item.Attributes.Add(attItem);
}
return(item);
}
public override DataItem CreateData(UndoRedoManager undoRedo)
{
var item = new GraphCollectionItem(this, undoRedo);
if (ChildDefinitions.Count == 1)
{
for (int i = 0; i < MinCount; i++)
{
var child = ChildDefinitions[0].CreateData(undoRedo);
item.Children.Add(child);
}
}
foreach (var att in Attributes)
{
var attItem = att.CreateData(undoRedo);
item.Attributes.Add(attItem);
}
return(item);
}
//-----------------------------------------------------------------------
protected override void OnDrop(DragEventArgs e)
{
if (e.Data.GetDataPresent("GraphNodeData") && (Data.Parent is GraphCollectionItem || Data.Parent.Parent is GraphCollectionItem))
{
DataItem item = e.Data.GetData("GraphNodeData") as DataItem;
DataItem droppedItem = Data.Parent is CollectionChildItem ? Data.Parent as DataItem : Data;
if (item == droppedItem)
{
return;
}
GraphCollectionItem collection = droppedItem.Parent as GraphCollectionItem;
bool isValid = false;
if (item is CommentItem)
{
isValid = true;
}
else
{
var wrapped = (item as CollectionChildItem).WrappedItem;
var droppedDef = wrapped.Definition;
if (droppedDef is ReferenceDefinition)
{
droppedDef = (wrapped as ReferenceItem).WrappedItem?.Definition ?? wrapped.Definition;
}
else if (droppedDef is GraphReferenceDefinition)
{
droppedDef = (wrapped as GraphReferenceItem).WrappedItem?.Definition ?? wrapped.Definition;
}
var cdef = (collection as GraphCollectionItem).CDef;
foreach (var def in cdef.ChildDefinitions)
{
var wrappeddef = def.WrappedDefinition;
if (wrappeddef == droppedDef)
{
isValid = true;
break;
}
if (wrappeddef is ReferenceDefinition)
{
if ((wrappeddef as ReferenceDefinition).Definitions.Values.Contains(droppedDef))
{
isValid = true;
break;
}
}
else if (wrappeddef is GraphReferenceDefinition)
{
if ((wrappeddef as GraphReferenceDefinition).Definitions.Values.Contains(droppedDef))
{
isValid = true;
break;
}
}
}
}
if (isValid)
{
if (droppedItem.Parent != item.Parent)
{
int srcIndex = item.Parent.Children.IndexOf(item);
int dstIndex = droppedItem.Parent.Children.IndexOf(droppedItem);
if (adorner.InsertionState == InsertionAdorner.InsertionStateEnum.After)
{
dstIndex = Math.Min(dstIndex + 1, collection.Children.Count - 1);
}
var srcCollection = item.Parent;
var dstCollection = droppedItem.Parent;
item.UndoRedo.ApplyDoUndo(() =>
{
srcCollection.Children.RemoveAt(srcIndex);
dstCollection.Children.Insert(dstIndex, item);
}, () =>
{
dstCollection.Children.RemoveAt(dstIndex);
srcCollection.Children.Insert(srcIndex, item);
}, "Move item");
}
else
{
int srcIndex = collection.Children.IndexOf(item);
int dstIndex = collection.Children.IndexOf(droppedItem);
if (srcIndex < dstIndex)
{
dstIndex--;
}
if (adorner.InsertionState == InsertionAdorner.InsertionStateEnum.After)
{
dstIndex = Math.Min(dstIndex + 1, collection.Children.Count - 1);
}
if (srcIndex != dstIndex)
{
(collection as ICollectionItem).MoveItem(srcIndex, dstIndex);
}
}
}
}
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
}
