/// <summary>
/// Uses recursion to find a path from each white cell to another. If no path can be found, returns false.
/// </summary>
/// <param name="cur"></param>
/// <returns>True if all white cells are connected vertically/horizontally and false otherwise.</returns>
private bool Connected(PuzzleCell cur)
{
cur.Visited = true;
if (_PuzzleGrid[cur.Row, cur.Column].Row != 0 && _PuzzleGrid[cur.Row - 1, cur.Column].White == true && _PuzzleGrid[cur.Row - 1, cur.Column].Visited == false)
{
Connected(_PuzzleGrid[cur.Row - 1, cur.Column]);
}
if (_PuzzleGrid[cur.Row, cur.Column].Column != _PuzzleGrid.GetLength(1) - 1 && _PuzzleGrid[cur.Row, cur.Column + 1].White == true && _PuzzleGrid[cur.Row, cur.Column + 1].Visited == false)
{
Connected(_PuzzleGrid[cur.Row, cur.Column + 1]);
}
if (_PuzzleGrid[cur.Row, cur.Column].Row != _PuzzleGrid.GetLength(0) - 1 && _PuzzleGrid[cur.Row + 1, cur.Column].White == true && _PuzzleGrid[cur.Row + 1, cur.Column].Visited == false)
{
Connected(_PuzzleGrid[cur.Row + 1, cur.Column]);
}
if (_PuzzleGrid[cur.Row, cur.Column].Column != 0 && _PuzzleGrid[cur.Row, cur.Column - 1].White == true && _PuzzleGrid[cur.Row, cur.Column - 1].Visited == false)
{
Connected(_PuzzleGrid[cur.Row, cur.Column - 1]);
}
if (CheckVisited())
{
return(true);
}
return(false);
}
/// <summary>
/// Method to be called upon clicking a label. If the label is white, sets background to black and forecolor to white.
/// If the label is black, sets background to white and forecolor to black. Updates PuzzleCell properties.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ux_PuzzleCell_Click(object sender, EventArgs e)
{
PuzzleCell clicked = sender as PuzzleCell;
if (clicked.BackColor == Color.White)
{
clicked.BackColor = Color.Black;
clicked.ForeColor = Color.White;
clicked.White = false;
}
else
{
clicked.BackColor = Color.White;
clicked.ForeColor = Color.Black;
clicked.White = true;
}
}
/// <summary>
/// Reads in a puzzle file and error checks for a valid input file.
/// </summary>
private void ReadPuzzleFile()
{
if (ux_OpenFileDialog.ShowDialog() == DialogResult.OK)
{
if (_PuzzleGrid == null)
{
int[,] tempPuzzleGrid = new int[5, 5];
using (StreamReader inFile = new StreamReader(ux_OpenFileDialog.FileName))
{
int rowIndex = 0;
while (!inFile.EndOfStream)
{
string[] nums = inFile.ReadLine().Split(' ');
if (nums.Length != 5)
{
throw new Exception();
}
for (int i = 0; i < nums.Length; i++)
{
if (Convert.ToInt32(nums[i]) < 1 || Convert.ToInt32(nums[i]) > 5)
{
throw new Exception();
}
}
for (int i = 0; i < nums.Length; i++)
{
tempPuzzleGrid[rowIndex, i] = Convert.ToInt32(nums[i]);
}
rowIndex++;
}
}
int xLocation = 130;
int yLocation = 80;
_PuzzleGrid = new PuzzleCell[5, 5];
for (int r = 0; r < tempPuzzleGrid.GetLength(0); r++)
{
for (int c = 0; c < tempPuzzleGrid.GetLength(1); c++)
{
PuzzleCell tempPC = new PuzzleCell(tempPuzzleGrid[r, c], r, c);
_PuzzleGrid[r, c] = tempPC;
tempPC.Text = tempPC.Number.ToString();
tempPC.Location = new Point(xLocation, yLocation);
tempPC.Size = new Size(30, 30);
tempPC.BackColor = Color.White;
Controls.Add(tempPC);
tempPC.Click += new EventHandler(ux_PuzzleCell_Click);
xLocation += 35;
}
xLocation = 130;
yLocation += 35;
}
}
else
{
for (int r = 0; r < _PuzzleGrid.GetLength(0); r++)
{
for (int c = 0; c < _PuzzleGrid.GetLength(1); c++)
{
Controls.Remove(_PuzzleGrid[r, c]);
}
}
int[,] tempPuzzleGrid = new int[5, 5];
using (StreamReader inFile = new StreamReader(ux_OpenFileDialog.FileName))
{
int rowIndex = 0;
while (!inFile.EndOfStream)
{
string[] nums = inFile.ReadLine().Split(' ');
if (nums.Length != 5)
{
throw new Exception();
}
for (int i = 0; i < nums.Length; i++)
{
if (Convert.ToInt32(nums[i]) < 1 || Convert.ToInt32(nums[i]) > 5)
{
throw new Exception();
}
}
for (int i = 0; i < nums.Length; i++)
{
tempPuzzleGrid[rowIndex, i] = Convert.ToInt32(nums[i]);
}
rowIndex++;
}
}
int xLocation = 130;
int yLocation = 80;
_PuzzleGrid = new PuzzleCell[5, 5];
for (int r = 0; r < tempPuzzleGrid.GetLength(0); r++)
{
for (int c = 0; c < tempPuzzleGrid.GetLength(1); c++)
{
PuzzleCell tempPC = new PuzzleCell(tempPuzzleGrid[r, c], r, c);
_PuzzleGrid[r, c] = tempPC;
tempPC.Text = tempPC.Number.ToString();
tempPC.Location = new Point(xLocation, yLocation);
tempPC.Size = new Size(30, 30);
tempPC.BackColor = Color.White;
Controls.Add(tempPC);
tempPC.Click += new EventHandler(ux_PuzzleCell_Click);
xLocation += 35;
}
xLocation = 130;
yLocation += 35;
}
}
}
}
