/// <summary>
/// A box in this group is notifying the group that it is relinquishing its value. All other members
/// of this group may now use the value provided it does not conflict with their groups.
/// </summary>
/// <param name="val"></param>
public void ValueIsAvailable(Box fromBox, int val)
{
foreach (Box b in boxes)
{
if (b != fromBox)
{
b.AddAvailableVal(this, val);
}
}
}
/// <summary>
/// A box in this group is notifying the group that it is using a new value. All other members
/// of this group must remove it from their set of available groups.
/// </summary>
/// <param name="fromBox"></param>
/// <param name="val"></param>
public void ValueIsUnavailable( Box fromBox, int val)
{
foreach (Box b in boxes)
{
if (b != fromBox)
{
b.RemoveAvailableVal(val);
}
}
}
// c'tor
public Board()
{
// create the groups
for (int i = 0; i < 9; i++)
{
rows[i] = new Group();
cols[i] = new Group();
squares[i] = new Group();
}
// create the boxes
for (int j = 0; j < 9; j++)
{
for (int i = 0; i < 9; i++)
{
Box newBox = new Box(this);
boxes[i, j] = newBox;
cols[i].AddBox(newBox);
newBox.AssignToGroup(cols[i]);
rows[j].AddBox(newBox);
newBox.AssignToGroup(rows[j]);
int iSquare = ((j / 3) * 3) + (i / 3);
squares[iSquare].AddBox(newBox);
newBox.AssignToGroup(squares[iSquare]);
}
}
// Keep making picks until board is filled
do
{
int iRow = iPick / 9;
int iCol = iPick - (iRow * 9);
if (boxes[iRow, iCol].MakePick())
{
iPick++;
}
else
{
iPick--;
}
} while (iPick < 81);
}
public void AddBox(Box box)
{
boxes.Add(box);
}