/// <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(ICCFocusable f)
{
LinkedListNode<ICCFocusable> 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(ICCFocusable f)
{
LinkedListNode <ICCFocusable> i = _FocusList.AddLast(f);
if (f.HasFocus)
{
if (_Current == null)
{
_Current = i;
}
else
{
f.HasFocus = false;
}
}
}
// Scroll to the next item in the focus list.
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)
{
ICCFocusable lostItem = current.Value;
// Search for the next node.
LinkedListNode <ICCFocusable> nextItem = null;
for (LinkedListNode <ICCFocusable> 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;
}
}
// Scroll to the previous item in the focus list.
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)
{
ICCFocusable lostItem = current.Value;
// TODO: take a look at the commented out code it does not seem to do anything.
// LinkedListNode<ICCFocusable> nextItem = null;
// for (LinkedListNode<ICCFocusable> 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;
}
}
// Scroll to the previous item in the focus list.
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)
{
ICCFocusable lostItem = current.Value;
LinkedListNode <ICCFocusable> nextItem = null;
for (LinkedListNode <ICCFocusable> 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(ICCFocusable f)
{
_FocusList.Remove(f);
}
/// <summary>
/// Removes the given focusable node
/// </summary>
/// <param name="f"></param>
public void Remove(ICCFocusable f)
{
_FocusList.Remove(f);
}
