protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (Cell.HasValue)
{
e.Graphics.DrawString(Cell.Value.ToString(), Font, _fore, new RectangleF(24, 10, ClientSize.Width, ClientSize.Height), StringFormat.GenericTypographic);
}
else
{
if (Cell.Candidates == 0 && !Focused)
{
BackColor = Color.Red;
}
int x = 0;
int y = 3 - ClientSize.Height / 3;
for (int i = 0; i < 9; i++)
{
if ((i % 3) == 0)
{
x = 6;
y += ClientSize.Height / 3;
}
else
{
x += ClientSize.Width / 3;
}
if (!Cell.HasCandidate(i + 1))
{
continue;
}
e.Graphics.DrawString((i + 1).ToString(), CandidateFont, _fore, new RectangleF(x, y, ClientSize.Width / 3, ClientSize.Height / 3), StringFormat.GenericTypographic);
}
}
}
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown(e);
int value = 0;
if (e.KeyCode >= Keys.D1 && e.KeyCode <= Keys.D9)
{
value = (e.KeyCode - Keys.D0);
}
if (e.KeyCode >= Keys.NumPad1 && e.KeyCode <= Keys.NumPad9)
{
value = (e.KeyCode - Keys.NumPad0);
}
if (value > 0 && Cell.HasCandidate(value))
{
Cell.Value = value;
}
}