/// <summary>
/// Adds the item as child of the specified parent, at the specified position.
///
/// After the addition, the \a parent's node will contain \a item as child
/// at the \a position.
/// </summary>
/// <param name="newItem"></param>
/// <param name="parentIndex"></param>
/// <param name="position"></param>
public virtual void AddItemAtPosition(GenericItem newItem, ModelIndex parentIndex, int position)
{
NotifyChildrenWillBeAdded(parentIndex, position, 1);
var parent = (GenericItem)parentIndex.d_modelData;
if (position > parent.GetChildren().Count)
{
throw new InvalidRequestException("The specified position is out of range.");
}
newItem.SetParent(parent);
parent.GetChildren().Insert(position, newItem);
NotifyChildrenAdded(parentIndex, position, 1);
}
/// <summary>
/// Gets the ordinal id (index) of the specified item in parent's children list.
/// </summary>
/// <param name="item"></param>
/// <returns></returns>
public virtual int GetChildId(GenericItem item)
{
if (item == null || item.GetParent() == null)
{
return(-1);
}
var parentItem = item.GetParent();
return(parentItem.GetChildren().IndexOf(item));
//std::vector<GenericItem*>::iterator itor = std::find(
// parent_item->getChildren().begin(), parent_item->getChildren().end(), item);
//if (itor == parent_item->getChildren().end())
// return -1;
//return std::distance(parent_item->getChildren().begin(), itor);
}
/// <summary>
/// Deletes all children of the specified item, optionally invoking the
/// EventChildren(WillBe)Removed event
/// </summary>
/// <param name="item"></param>
/// <param name="notify"></param>
protected void DeleteChildren(GenericItem item, bool notify)
{
if (item == null)
{
throw new InvalidRequestException("Cannot delete children of a NULL item!");
}
var itemsCount = item.GetChildren().Count;
//std::vector<GenericItem*>::iterator itor = item->getChildren().begin();
if (notify)
{
NotifyChildrenWillBeRemoved(new ModelIndex(item), 0, itemsCount);
}
while (item.GetChildren().Count != 0)
{
var itor = item.GetChildren()[0];
DeleteChildren(itor, notify);
// TODO: delete *itor;
item.GetChildren().Remove(itor);
}
//while (itor != item->getChildren().end())
//{
// DeleteChildren(*itor, notify);
// // TODO: delete *itor;
// itor = item->getChildren().erase(itor);
//}
if (notify)
{
NotifyChildrenRemoved(new ModelIndex(item), 0, itemsCount);
}
}
/// <summary>
/// Adds the item as child of the root at the specified position.
/// </summary>
/// <param name="item"></param>
/// <param name="pos"></param>
public virtual void AddItemAtPosition(GenericItem item, int pos)
{
AddItemAtPosition(item, GetRootIndex(), pos);
}