/// <summary>
/// Delete's a slot's text out of all it's row/column/box's possibleEntries.
/// </summary>
/// <param name="senderControl"></param>
static public void RemoveNeighbors(SudokuSlot senderControl, List <SudokuSlot> slotList, SolveHistory history, Queue <SudokuSlot> queueToClean)
{
foreach (SudokuSlot slot in slotList)
{
if (slot.row == senderControl.row & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
{
queueToClean.Enqueue(slot);
}
}
else if (slot.column == senderControl.column & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
{
queueToClean.Enqueue(slot);
}
}
else if (slot.box == senderControl.box & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
{
queueToClean.Enqueue(slot);
}
}
history.AddSnapshot(slotList);
}
if (queueToClean.Count > 0)
{
RemoveNeighbors(queueToClean.Dequeue(), slotList, history, queueToClean);
}
}
/// <summary>
/// Delete's a slot's text out of all it's row/column/box's possibleEntries.
/// </summary>
/// <param name="senderControl"></param>
public static void RemoveNeighbors(SudokuSlot senderControl, List<SudokuSlot> slotList, SolveHistory history, Queue<SudokuSlot> queueToClean)
{
foreach (SudokuSlot slot in slotList)
{
if (slot.row == senderControl.row & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
queueToClean.Enqueue(slot);
}
else if (slot.column == senderControl.column & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
queueToClean.Enqueue(slot);
}
else if (slot.box == senderControl.box & slot != senderControl)
{
if (slot.RemovePossibleEntry(senderControl.Text) == true)
queueToClean.Enqueue(slot);
}
history.AddSnapshot(slotList);
}
if (queueToClean.Count > 0)
RemoveNeighbors(queueToClean.Dequeue(), slotList, history, queueToClean);
}
// Determines whether the keystroke is contained in slot's Possible Entries.
private void IsValidEntry(object sender, KeyEventArgs e)
{
SudokuSlot senderControl = (SudokuSlot)sender;
if (e.KeyCode != Keys.Back && e.KeyCode != Keys.Delete)
{
// If the key is in the slot's possible entries, process it
try
{
if (this.possibleEntries.Contains(keyValues[e.KeyValue]))
{
this.Text = keyValues[e.KeyValue].ToString();
}
}
catch { senderControl.Text = senderControl.Text; }
}
}
// Controls movement keys and calling individual slot's Validation method
private void sudokuSlot_KeyDown(object sender, KeyEventArgs e)
{
SudokuSlot senderControl = (SudokuSlot)sender;
//Navigation
if (e.KeyCode == Keys.Down)
{
foreach (SudokuSlot slot in allSlots)
{
if (senderControl.row == 9)
{
if (slot.TabIndex == senderControl.TabIndex - 72)
{
slot.Focus();
break;
}
}
else
if (slot.TabIndex == senderControl.TabIndex + 9)
{
slot.Focus();
break;
}
}
}
else if (e.KeyCode == Keys.Up)
{
foreach (SudokuSlot slot in allSlots)
{
if (senderControl.row == 1)
{
if (slot.TabIndex == senderControl.TabIndex + 72)
{
slot.Focus();
break;
}
}
else
if (slot.TabIndex == senderControl.TabIndex - 9)
{
slot.Focus();
break;
}
}
}
else if (e.KeyCode == Keys.Right)
{
foreach (SudokuSlot slot in allSlots)
{
if (senderControl.row == 9 & senderControl.column == 9)
{
if (slot.TabIndex == senderControl.TabIndex - 80)
{
slot.Focus();
break;
}
}
else
if (slot.TabIndex == senderControl.TabIndex + 1)
{
slot.Focus();
break;
}
}
}
else if (e.KeyCode == Keys.Left)
{
foreach (SudokuSlot slot in allSlots)
{
if (senderControl.row == 1 & senderControl.column == 1)
{
if (slot.TabIndex == senderControl.TabIndex + 80)
{
slot.Focus();
break;
}
}
else
if (slot.TabIndex == senderControl.TabIndex - 1)
{
slot.Focus();
break;
}
}
}
// Send anything else to validation.
else
{
string oldEntry = senderControl.Text;
senderControl.SudokuSlot_KeyDown(sender, e);
}
}
// Call slot's specific KeyPress event
private void sudokuSlot_KeyPress(object sender, KeyPressEventArgs e)
{
SudokuSlot senderControl = (SudokuSlot)sender;
senderControl.SudokuSlot_KeyPress(sender, e);
}
