/// <summary>
/// Create a new instance of this class.
/// </summary>
public Submenu()
{
this.entries = new MenuEntryCollection {
Parent = this
};
this.Text = "Submenu";
}
private void move(bool up)
{
MenuEntryCollection parent = this.Parent;
if (parent == null)
{
return; // Unable to do anything
}
int index = parent.IndexOf(this);
// The item is at the beginning of the collection
if ((index == 0 && up) || (index == parent.Count - 1 && !up))
{
if (parent.Parent == null)
{
return; // We can't move the element any further.
}
MenuEntryCollection parentParent = parent.Parent.Parent;
if (parentParent == null)
{
return; // There is nothing we can do.
}
int parentIndex = parentParent.IndexOf(parent.Parent);
this.IsSelected = false;
parent.Remove(this);
if (up)
{
parentParent.Insert(parentIndex, this);
}
else
{
parentParent.Insert(parentIndex + 1, this);
}
this.IsSelected = true;
}
else // The element is somewhere in the parent collection and can be moved.
{
int delta = 1; // Increase the index by one.
if (up)
{
delta = -1; // Decrease the index by one.
}
Submenu moveInto = parent[index + delta] as Submenu;
if (moveInto == null)
{
parent.Move(index, index + delta);
}
else
{
this.IsSelected = false;
parent.Remove(this);
moveInto.IsExpanded = true;
if (up)
{
moveInto.MenuEntries.Add(this);
}
else
{
moveInto.MenuEntries.Insert(0, this);
}
this.IsSelected = true;
}
}
}