public void DisplayCandidatesForCell(SudokuLabel label)
{
var candidates = "123456789";
const string nl = "\r\n";
// Get the SudokuLabels that can be changed by the user.
foreach (var lbl in tableLayoutPanel1.Controls.OfType <SudokuLabel>().Where(lbl => lbl.Column == label.Column))
{
candidates = candidates.Replace(lbl.Value.ToString(), " ");
label.Candidates = $@"{candidates.Substring(0, 3)}{nl}{candidates.Substring(3, 3)}{nl}{candidates.Substring(6, 3)}";
}
foreach (var lbl in tableLayoutPanel1.Controls.OfType <SudokuLabel>().Where(lbl => lbl.Row == label.Row))
{
candidates = candidates.Replace(lbl.Value.ToString(), " ");
label.Candidates = $@"{candidates.Substring(0, 3)}{nl}{candidates.Substring(3, 3)}{nl}{candidates.Substring(6, 3)}";
}
foreach (var lbl in tableLayoutPanel1.Controls.OfType <SudokuLabel>().Where(lbl => lbl.SubGrid == label.SubGrid))
{
candidates = candidates.Replace(lbl.Value.ToString(), " ");
label.Candidates = $@"{candidates.Substring(0, 3)}{nl}{candidates.Substring(3, 3)}{nl}{candidates.Substring(6, 3)}";
}
candidates = $"{candidates.Substring(0, 3)}{nl}{candidates.Substring(3, 3)}{nl}{candidates.Substring(6, 3)}";
label.Text = candidates;
}
public void DrawBoard()
{
//if (tableLayoutPanel1.Controls.Count >= 81) throw new Exception("The board has already been drawn.");
// used to store the location of the cell
var location = new Point();
// draws the cells
for (var row = 1; row <= 9; row++)
{
for (var col = 1; col <= 9; col++)
{
location.X = col * (CellWidth + 1) + XOffset - 8;
location.Y = row * (CellHeight + 1) + YOffset - 28;
var subgrid = SudokuPuzzle.GetRegion(col, row);
var sudokuLabel = new SudokuLabel
{
Name = $"Label{col}{row}{subgrid}",
Tag = $"Label{col}{row}{subgrid}",
Font = new Font("Consolas", 8, FontStyle.Bold),
BorderStyle = BorderStyle.Fixed3D,
Location = location,
Width = CellWidth,
Height = CellHeight,
Margin = new Padding(0),
Padding = new Padding(0),
TextAlign = ContentAlignment.MiddleCenter,
BackColor = UserBackColor,
ForeColor = UserForeColor,
Text = $@"{col}{row}{subgrid}",
Column = col,
Row = row,
SubGrid = SudokuPuzzle.GetRegion(col, row)
};
SudokuPuzzle.SetAlternateRegionColors(ref sudokuLabel);
sudokuLabels.Add(sudokuLabel);
if (tableLayoutPanel1.Controls.Count < 81)
{
tableLayoutPanel1.Controls.Add(sudokuLabel);
}
}
}
}
public static void SetAlternateRegionColors(ref SudokuLabel label)
{
switch (label.SubGrid)
{
case 1:
case 3:
case 5:
case 7:
case 9:
label.BackColor = Color.LightYellow;
break;
case 2:
case 4:
case 6:
case 8:
label.BackColor = Color.LightSteelBlue;
break;
}
}