private void ExecuteDrop(object parameter)
{
DropParameters dropParameters = (DropParameters)parameter;
TreeViewExItem tvei = dropParameters.DropToItem;
IDataObject dataObject = dropParameters.Data as IDataObject;
int index = dropParameters.Index;
Node node = (tvei == null)?null:tvei.DataContext as Node;
if (dataObject.GetDataPresent("NewNode"))
{
AddNode(node, index, new Node()
{
Name = "New node"
});
}
if (dataObject.GetDataPresent("Nodes"))
{
var nodeList = dataObject.GetData("Nodes") as IEnumerable <Node>;
foreach (var item in nodeList)
{
Node oldNode = item as Node;
Node newNode = new Node();
newNode.Name = string.Format("Copy of {0}", oldNode.Name.Replace(" (Drag Allowed)", string.Empty));
AddNode(node, index, newNode);
}
}
return;
}
private bool CanExecuteDrop(object parameter)
{
DropParameters dropParameters = (DropParameters)parameter;
TreeViewExItem tvei = dropParameters.DropToItem;
IDataObject dataObject = dropParameters.Data as IDataObject;
if (!dataObject.GetDataPresent("NewNode") && !dataObject.GetDataPresent("Nodes"))
{
return(false);
}
int index = dropParameters.Index;
Node node = (tvei == null)?null:tvei.DataContext as Node;
if (tvei == null)
{
return(true); //drop to root
}
if (index == -1)
{
return(node.AllowDrop);
}
else
{
return(node.AllowInsert);
}
}
private void ExecuteDrop(object parameter)
{
DropParameters dropParameters = (DropParameters)parameter;
TreeViewExItem tvei = dropParameters.DropToItem;
IDataObject dataObject = dropParameters.DropData as IDataObject;
int index = dropParameters.Index;
Node node = (tvei == null)?null:tvei.DataContext as Node;
foreach (string f in dataObject.GetFormats())
{
object obj = dataObject.GetData(f);
DragContent content = obj as DragContent;
if (content != null)
{
foreach (var item in content.Items.Reverse())
{
Node oldNode = (Node)item;
Node newNode = new Node();
newNode.Name = string.Format("Copy of {0}", oldNode.Name.Replace(" (Drag Allowed)", string.Empty));
AddNode(node, index, newNode);
}
}
else
{
AddNode(node, index, new Node()
{
Name = "New node"
});
}
}
return;
}
private void OnDrop(DropParameters arg)
{
LogData(arg.Event.DropData, nameof(OnDrop));
Debug.WriteLine("Data is null? " + (arg.Event.DataObject == null));
System.Runtime.InteropServices.ComTypes.IDataObject dataObject = arg.Event.DataObject;
if (dataObject != null)
{
ExtractData(nameof(OnDrop), new DataObject(dataObject));
}
}
