//-----------------------------------------------------------------------
protected override void OnDragOver(DragEventArgs e)
{
if (e.Data.GetDataPresent("GraphNodeData") && (Data.Parent is GraphCollectionItem || Data.Parent.Parent is GraphCollectionItem))
{
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
adorner = new InsertionAdorner(true, false, this, draggedImage, e.GetPosition(this));
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
}
//-----------------------------------------------------------------------
public void DragStart(object sender, DragStartedEventArgs e)
{
if (DataItem is CollectionChildItem)
{
CollectionChildItem itemBase = (CollectionChildItem)DataItem;
DataItem collection = itemBase.ParentCollection;
if (collection != null)
{
draggedImage = InsertionAdorner.ConvertElementToImage(this);
DataObject dragData = new DataObject("CollectionChildItem", DataItem);
dragData.SetData("Element", this);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
}
}
else if (DataItem is TreeItem)
{
TreeItem itemBase = (TreeItem)DataItem;
TreeItem collection = (TreeItem)itemBase.Parent;
if (collection != null)
{
draggedImage = InsertionAdorner.ConvertElementToImage(this);
DataObject dragData = new DataObject("TreeItem", DataItem);
dragData.SetData("Element", this);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
}
}
else if (DataItem is CommentItem)
{
CommentItem itemBase = (CommentItem)DataItem;
DataItem collection = itemBase.Parent;
if (collection != null && itemBase.CanReorder)
{
draggedImage = InsertionAdorner.ConvertElementToImage(this);
DataObject dragData = new DataObject("CommentItem", DataItem);
dragData.SetData("Element", this);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
}
}
}
//#############################################################################################
#region Mouse Events
//-----------------------------------------------------------------------
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (Data.Parent is CollectionChildItem && Data.Parent.Parent is GraphCollectionItem)
{
draggedImage = InsertionAdorner.ConvertElementToImage(this);
DataObject dragData = new DataObject("GraphNodeData", Data.Parent);
dragData.SetData("Element", this);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
e.Handled = true;
}
else if (Data is CommentItem && Data.Parent is GraphCollectionItem)
{
draggedImage = InsertionAdorner.ConvertElementToImage(this);
DataObject dragData = new DataObject("GraphNodeData", Data);
dragData.SetData("Element", this);
DragDrop.DoDragDrop(this, dragData, DragDropEffects.Move);
e.Handled = true;
}
}
//-----------------------------------------------------------------------
protected override void OnDragOver(DragEventArgs e)
{
if (e.Data.GetDataPresent("CommentItem"))
{
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
adorner = new InsertionAdorner(true, false, this, draggedImage, e.GetPosition(this));
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
else if (DataItem is CollectionChildItem)
{
CollectionChildItem item = e.Data.GetData("CollectionChildItem") as CollectionChildItem;
var wrappedItem = item.GetNonWrappedItem(item) ?? item.WrappedItem;
DataItem collection = ((CollectionChildItem)DataItem).ParentCollection;
if (collection is CollectionItem)
{
var allowedDefs = (collection as CollectionItem).CDef.ChildDefinitions.Select(o => o.WrappedDefinition);
if (allowedDefs.Contains(item.WrappedItem.Definition) || allowedDefs.Contains(wrappedItem.Definition) ||
allowedDefs.Where(o => o is ReferenceDefinition).Any(o => (o as ReferenceDefinition).Definitions.Values.Contains(wrappedItem.Definition)))
{
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
var dataItem = DataItem as DataItem;
adorner = new InsertionAdorner(true, false, this, draggedImage, e.GetPosition(this));
}
}
else if (collection is GraphCollectionItem)
{
if ((collection as GraphCollectionItem).CDef.ChildDefinitions.Select(o => o.WrappedDefinition).Contains((item.Definition as CollectionChildDefinition).WrappedDefinition))
{
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
var dataItem = DataItem as DataItem;
adorner = new InsertionAdorner(true, false, this, draggedImage, e.GetPosition(this));
}
}
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
else if (DataItem is TreeItem)
{
TreeItem item = e.Data.GetData("TreeItem") as TreeItem;
TreeItem collection = (TreeItem)DataItem;
if (!item.Descendants.Contains(collection))
{
if (adorner != null)
{
adorner.Detach();
adorner = null;
}
adorner = new InsertionAdorner(true, false, this, draggedImage, e.GetPosition(this));
}
e.Effects = DragDropEffects.Move;
e.Handled = true;
}
else
{
e.Effects = DragDropEffects.None;
}
}