private void SearchTick_Elapsed(object sender, ElapsedEventArgs e)
{
if (!_searching)
{
_searching = true;
if (!InternalPlayground.StillContainsItem())
{
_searchTick.Stop();
}
SearchItems();
_searching = false;
}
}
private void SearchItems()
{
_itemPositions.Clear();
_pointsToSearch.Clear();
_pointsToSearch.Enqueue(InternalPlayground.Pawn.Location);
while (_pointsToSearch.Any())
{
Point p = _pointsToSearch.Dequeue();
if (!InternalPlayground.IsItem(p))
{
var upperNeighbour = p.UpperNeighbour();
var lowerNeighbour = p.LowerNeighbour();
var leftNeighbour = p.LeftNeighbour();
var rightNeighbour = p.RightNeighbour();
if (InternalPlayground.FieldAccessible(upperNeighbour))
{
AddPointIfNotExistent(upperNeighbour, p);
}
if (InternalPlayground.FieldAccessible(lowerNeighbour))
{
AddPointIfNotExistent(lowerNeighbour, p);
}
if (InternalPlayground.FieldAccessible(leftNeighbour))
{
AddPointIfNotExistent(leftNeighbour, p);
}
if (InternalPlayground.FieldAccessible(rightNeighbour))
{
AddPointIfNotExistent(rightNeighbour, p);
}
}
else
{
CreatePath(p);
break;
}
}
}
private void CreatePath(Point itemPosition)
{
Stack <Point> wayFromOrigin = new Stack <Point>();
wayFromOrigin.Push(itemPosition);
Point fromPoint = itemPosition;
while (fromPoint != InternalPlayground.Pawn.Location)
{
fromPoint = (Point)_itemPositions[fromPoint];
if (fromPoint != InternalPlayground.Pawn.Location)
{
wayFromOrigin.Push(fromPoint);
}
}
while (wayFromOrigin.Any())
{
Point moveToPoint = wayFromOrigin.Pop();
InternalPlayground.MovePawn(moveToPoint);
Thread.Sleep(1000);
}
}
public void MoveRight()
{
InternalPlayground.MovePawnRight();
}
public void MoveLeft()
{
InternalPlayground.MovePawnLeft();
}
public void MoveDown()
{
InternalPlayground.MovePawnDown();
}
public void MoveUp()
{
InternalPlayground.MovePawnUp();
}
