/// <summary>
/// Adds the given node to the list of focus nodes. If the node has the focus, then it is
/// given the current focused item status. If there is already a focused item and the
/// given node has focus, the focus is disabled.
/// </summary>
/// <param name="f"></param>
public void Add(CCIFocusable f)
{
LinkedListNode<CCIFocusable> i = _FocusList.AddLast(f);
if (f.HasFocus)
{
if (_Current == null)
{
_Current = i;
}
else
{
f.HasFocus = false;
}
}
}
/// <summary>
/// Adds the given node to the list of focus nodes. If the node has the focus, then it is
/// given the current focused item status. If there is already a focused item and the
/// given node has focus, the focus is disabled.
/// </summary>
/// <param name="f"></param>
public void Add(CCIFocusable f)
{
LinkedListNode <CCIFocusable> i = _FocusList.AddLast(f);
if (f.HasFocus)
{
if (_Current == null)
{
_Current = i;
}
else
{
f.HasFocus = false;
}
}
}
/// <summary>
/// Scroll to the next item in the focus list.
/// </summary>
public void FocusNextItem()
{
if (_Current == null && _FocusList.Count > 0)
{
_Current = _FocusList.First;
_Current.Value.HasFocus = true;
if (OnFocusChanged != null)
{
OnFocusChanged(null, _Current.Value);
}
}
else if (_Current != null)
{
CCIFocusable lostItem = _Current.Value;
// Search for the next node.
LinkedListNode <CCIFocusable> nextItem = null;
for (LinkedListNode <CCIFocusable> p = _Current.Next; p != null; p = p.Next)
{
if (p.Value.CanReceiveFocus)
{
nextItem = p;
}
}
if (nextItem != null)
{
_Current = nextItem;
}
else
{
_Current = _FocusList.First;
}
lostItem.HasFocus = false;
_Current.Value.HasFocus = true;
if (OnFocusChanged != null)
{
OnFocusChanged(lostItem, _Current.Value);
}
}
else
{
_Current = null;
}
}
/// <summary>
/// Scroll to the previous item in the focus list.
/// </summary>
public void FocusPreviousItem()
{
if (ItemWithFocus == null && _FocusList.Count > 0)
{
_Current = _FocusList.Last;
_Current.Value.HasFocus = true;
if (OnFocusChanged != null)
{
OnFocusChanged(null, _Current.Value);
}
}
else if (_Current != null)
{
CCIFocusable lostItem = _Current.Value;
LinkedListNode <CCIFocusable> nextItem = null;
for (LinkedListNode <CCIFocusable> p = _Current.Previous; p != null; p = p.Previous)
{
if (p.Value.CanReceiveFocus)
{
nextItem = p;
}
}
if (_Current.Previous != null)
{
_Current = _Current.Previous;
}
else
{
_Current = _FocusList.Last;
}
lostItem.HasFocus = false;
_Current.Value.HasFocus = true;
if (OnFocusChanged != null)
{
OnFocusChanged(lostItem, _Current.Value);
}
}
else
{
_Current = null;
}
}
/// <summary>
/// Removes the given focusable node
/// </summary>
/// <param name="f"></param>
public void Remove(CCIFocusable f)
{
_FocusList.Remove(f);
}
/// <summary>
/// Removes the given focusable node
/// </summary>
/// <param name="f"></param>
public void Remove(CCIFocusable f)
{
_FocusList.Remove(f);
}
