public Fragment Grow()
{
if (Tail == null)
return (Head = Tail = new Fragment(true));
return Tail = Tail.Grow();
}
public Fragment Grow()
{
if (this.Next != null)
return this.Next.Grow();
var f = new Fragment() { Direction = this.Direction };
return (this.Next = f);
}
public void Show(Fragment previous, Fragment next)
{
var previousblock = registery[previous];
var bp = previousblock.GetTailPosition(next.Direction);
var newblock = new Block(bp);
DisplayPanel.Show(newblock);
registery.Add(next, newblock);
}
public void UpdatePositions()
{
head = head ?? registery.Keys.Single(x => x.IsHead);
var headblock = registery[head];
var headblockpos = headblock.Move(head.Direction);
if (headblockpos.Column < 0 || headblockpos.Column == DisplayPanel.Columns ||
headblockpos.Row < 0 || headblockpos.Row == DisplayPanel.Rows)
{
WillCollideWithWall(this, new EventArgs());
return;
}
if (registery.Values.Any(x => x != headblock && x.Position.Row == headblock.Position.Row
&& x.Position.Column == headblock.Position.Column))
{
WillCollideWithItself(this, new EventArgs());
return;
}
headblock.UndoMove();
if (bait != null && headblock.Position.Row == bait.Position.Row
&& headblock.Position.Column == bait.Position.Column)
{
FoodTaken(this, new EventArgs());
}
foreach (var pair in registery)
{
var f = pair.Key;
var block = pair.Value;
var bp = block.Move(f.Direction);//will not move.
DisplayPanel.UpdatePosition(block);
}
}
public void Show(Fragment head)
{
var block = GetNewBlock();
DisplayPanel.Show(block);
registery.Add(head, block);
}
public void Clear()
{
DisplayPanel.Clear();
registery.Clear();
head = null;
}
