private DropReturnData EhAvailableItems_Drop(object data, object nonGuiTargetItem, DragDropRelativeInsertPosition insertPosition, bool isCtrlKeyPressed, bool isShiftKeyPressed)
{
// when dropping onto available items, it's only purpose is to remove some items from the item lists
// thus the only operation here is move
if (data is TItem)
{
return(new DropReturnData
{
IsCopy = false,
IsMove = true // we want the item to be removed from the current item list
});
}
else
{
return(DropFailedReturnData);
}
}
private DropReturnData EhCurrentItems_Drop(object data, object nonGuiTargetItem, DragDropRelativeInsertPosition insertPosition, bool isCtrlKeyPressed, bool isShiftKeyPressed)
{
var droppedItem = default(TItem);
if (data is Type)
{
object createdObj = null;
try
{
createdObj = System.Activator.CreateInstance((Type)data);
}
catch (Exception ex)
{
Current.Gui.ErrorMessageBox("This object could not be dropped because it could not be created, message: " + ex.ToString(), "Error");
return(DropFailedReturnData);
}
if (!(createdObj is TItem))
{
return(DropFailedReturnData);
}
droppedItem = (TItem)createdObj;
} // end if data is type
else if (data is TItem)
{
droppedItem = (TItem)data;
} // end if data is TItem
else
{
return(DropFailedReturnData);
}
int targetIndex = int.MaxValue;
if (nonGuiTargetItem is SelectableListNode)
{
int idx = _currentItems.IndexOf((SelectableListNode)nonGuiTargetItem);
if (idx >= 0 && insertPosition.HasFlag(DragDropRelativeInsertPosition.AfterTargetItem))
{
++idx;
}
targetIndex = idx;
}
var newNode = new SelectableListNode(droppedItem.ToString(), droppedItem, false);
if (targetIndex >= _currentItems.Count)
{
_currentItems.Add(newNode);
}
else
{
_currentItems.Insert(targetIndex, newNode);
}
SetListDirty();
return(new DropReturnData
{
IsCopy = isCtrlKeyPressed,
IsMove = !isCtrlKeyPressed
});
}
private DropCanAcceptDataReturnData EhAvailableItems_DropCanAcceptData(object data, object nonGuiTargetItem, DragDropRelativeInsertPosition insertPosition, bool isCtrlKeyPressed, bool isShiftKeyPressed)
{
// when dropping onto available items, it's only purpose is to remove some items from the current item lists
// thus the only operation here is move
return(new DropCanAcceptDataReturnData
{
CanCopy = false,
CanMove = true, // we want the item to be removed from the current item list
ItemIsSwallowingData = false
});
}
private DropCanAcceptDataReturnData EhCurrentItems_DropCanAcceptData(object data, object nonGuiTargetItem, DragDropRelativeInsertPosition insertPosition, bool isCtrlKeyPressed, bool isShiftKeyPressed)
{
// investigate data
if (data is TItem)
{
return(new DropCanAcceptDataReturnData
{
CanCopy = true,
CanMove = false,
ItemIsSwallowingData = false
});
}
else if (data is Type)
{
return(new DropCanAcceptDataReturnData
{
CanCopy = true,
CanMove = false,
ItemIsSwallowingData = false
});
}
else
{
return(new DropCanAcceptDataReturnData
{
CanCopy = false,
CanMove = false,
ItemIsSwallowingData = false
});
}
}