void PaintCages(PaintContext context, Pen thick)
{
for (int x = 0; x < Cells - 1; ++x)
{
for (int y = 0; y < Cells; ++y)
{
if (CageAt(x, y) != CageAt(x + 1, y))
{
context.DrawVerticalLine(x, y, thick);
}
}
}
for (int x = 0; x < Cells; ++x)
{
for (int y = 0; y < Cells - 1; ++y)
{
if (CageAt(x, y) != CageAt(x, y + 1))
{
context.DrawHorizontalLine(x, y, thick);
}
}
}
}
public void Paint(PaintContext context)
{
Graphics graphics = context.graphics;
// Background
Brush back =
InEditMode ? Brushes.LightSalmon :
(solver.UnfulfilledRequirements.Length == 0) ? Brushes.LightGreen :
Brushes.White;
context.FillBackground(back);
// Coloured cages or boxes
if (gridOptions.colours != null)
{
Color[] cage_colours = new Color[] {
Color.FromArgb(255, 253, 152),
Color.FromArgb(207, 231, 153),
Color.FromArgb(203, 232, 250),
Color.FromArgb(248, 207, 223)
};
Brush[] cage_brushes = new Brush[4];
for (int i = 0; i < 4; ++i)
{
cage_brushes[i] = new SolidBrush(cage_colours[i]);
}
for (int x = 0; x < Cells; ++x)
{
for (int y = 0; y < Cells; ++y)
{
context.FillCell(x, y, cage_brushes[gridOptions.colours[x, y]]);
}
}
for (int i = 0; i < 4; ++i)
{
cage_brushes[i].Dispose();
}
}
// Diagonals - brush previously Brushes.LightGray
if (MajorDiagonal)
{
using (Brush br = new HatchBrush(HatchStyle.ForwardDiagonal, Color.DarkGray, Color.Transparent))
for (int x = 0; x < Cells; ++x)
{
context.FillCell(x, x, br);
}
}
if (MinorDiagonal)
{
using (Brush br = new HatchBrush(HatchStyle.BackwardDiagonal, Color.DarkGray, Color.Transparent))
for (int x = 0; x < Cells; ++x)
{
context.FillCell(x, Cells - x - 1, br);
}
}
// Cage totals
if (IsKiller)
{
Point?[] cage_indicators = new Point?[NumCages];
for (int y = Cells - 1; y >= 0; --y)
{
for (int x = Cells - 1; x >= 0; --x)
{
if (flags[x, y] == CellFlags.Free)
{
cage_indicators[cageInfo.cages[x, y]] = new Point(x, y);
}
}
}
using (Pen inner = new Pen(Color.White, 5.0f))
PaintCages(context, inner);
for (int i = 0; i < NumCages; ++i)
{
if (cage_indicators[i] != null)
{
context.DrawTotal(Brushes.Black,
cage_indicators[i].Value.X, cage_indicators[i].Value.Y, cageInfo.remaining_totals[i].ToString());
}
}
}
foreach (Hint hint in paintedHints)
{
hint.PaintBackground(context);
}
context.DrawSelection();
// Grid
Dictionary <int, int> bs = new Dictionary <int, int>();
for (int x = 0; x < Cells; ++x)
{
for (int y = 0; y < Cells; ++y)
{
int b = BoxAt(x, y);
if (bs.ContainsKey(b))
{
++bs[b];
}
else
{
bs[b] = 1;
}
}
}
Func <int, int, int, int, int> border = (int x0, int y0, int x1, int y1) =>
{
int b0 = BoxAt(x0, y0), b1 = BoxAt(x1, y1);
if (b0 == b1)
{
return(0);
}
if (bs[b0] < Cells || bs[b1] < Cells)
{
return(2);
}
return(1);
};
using (Pen thick = new Pen(Color.Black, 3.0f))
using (Pen wrong = new Pen(Color.Red, 3.0f))
{
Pen[] pens = { Pens.Black, thick, wrong };
for (int x = 0; x < Cells - 1; ++x)
{
for (int y = 0; y < Cells; ++y)
{
context.DrawVerticalLine(x, y, pens[border(x, y, x + 1, y)]);
}
}
for (int x = 0; x < Cells; ++x)
{
for (int y = 0; y < Cells - 1; ++y)
{
context.DrawHorizontalLine(x, y, pens[border(x, y, x, y + 1)]);
}
}
}
// Givens
{
for (int x = 0; x < Cells; ++x)
{
for (int y = 0; y < Cells; ++y)
{
if (flags[x, y] == CellFlags.Fixed)
{
context.DrawCell(Brushes.Black, x, y, values[x, y]);
}
else if (flags[x, y] == CellFlags.Play)
{
context.DrawCell(Brushes.Purple, x, y, values[x, y]);
}
else if (flags[x, y] == CellFlags.Solved)
{
context.DrawCell(Brushes.Green, x, y, values[x, y]);
}
}
}
}
// Knowns of solver
{
foreach (Candidate k in solver.SelectedCandidates)
{
SudokuCandidate sc = (SudokuCandidate)k;
if (flags[sc.x, sc.y] == CellFlags.Free)
{
context.DrawCell(Brushes.Green, sc.x, sc.y, sc.n);
}
}
}
// Unknowns as pencil marks
if (HintFlags.PaintPencilMarks)
{
foreach (SudokuCandidate k in solver.UnselectedCandidates)
{
context.SetPencil(k, Hint.Kind.Maybe);
}
}
foreach (Hint hint in paintedHints)
{
hint.PaintForeground(context);
}
context.PaintPencilMarksAndHints();
}