} //end openButton method
/// <summary>
/// this method lets the user click PuzzleCell objects in the GUI and change them to black or white and also sets the color property for each PuzzleCell object
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void LabelClicked(object sender, EventArgs e)
{
PuzzleCell temp = (PuzzleCell)sender;
if (temp.getColor() == true)
{
temp.ForeColor = Color.White;
temp.BackColor = Color.Black;
temp.setColor(false);
resetVisited();
}
else
{
temp.ForeColor = Color.Black;
temp.BackColor = Color.White;
temp.setColor(true);
resetVisited();
}
}//end label click event handler
}//end display solution button method
/// <summary>
/// this recursive method determines whether or not all the white PuzzleCells are connected in the puzzle
/// </summary>
/// <param name="cur"></param>
/// <returns>whether all the white PuzzleCells are connected</returns>
private bool Connected(PuzzleCell cur)
{
//For each of cur's neighbors (above, below, left, and right) that are UNVISITED and WHITE:
//Recursively call Connected with that neighbor.
//If any of those recursive calls return true, that means that all cells were visited and that all the white cells must be connected
//Console.WriteLine("Visited: " + cur.getRow().ToString() + " " + cur.getCol().ToString());
cur.setVisited(true);
bool done = false;
if (cur.getRow() - 1 >= 0)
{
PuzzleCell upNeighbor = puzzle[cur.getRow() - 1, cur.getCol()];
if (upNeighbor.getColor() == true && upNeighbor.getVistited() == false)
{
done = Connected(upNeighbor);
}
if (done)
{
return(true);
}
}
if (cur.getRow() + 1 <= 4)
{
PuzzleCell downNeighbor = puzzle[cur.getRow() + 1, cur.getCol()];
if (downNeighbor.getColor() == true && downNeighbor.getVistited() == false)
{
done = Connected(downNeighbor);
}
if (done)
{
return(true);
}
}
if (cur.getCol() - 1 >= 0)
{
PuzzleCell leftNeighbor = puzzle[cur.getRow(), cur.getCol() - 1];
if (leftNeighbor.getColor() == true && leftNeighbor.getVistited() == false)
{
done = Connected(leftNeighbor);
}
if (done)
{
return(true);
}
}
if (cur.getCol() + 1 <= 4)
{
PuzzleCell rightNeighbor = puzzle[cur.getRow(), cur.getCol() + 1];
if (rightNeighbor.getColor() == true && rightNeighbor.getVistited() == false)
{
done = Connected(rightNeighbor);
}
if (done)
{
return(true);
}
}
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if (puzzle[i, j].getColor() == true)
{
if (puzzle[i, j].getVistited() == false)
{
return(false);
}
}
}
}
return(true);
}//end of Connected method
