void RedrawGrid()
{
if (img != null)
{
img.Dispose();
}
img = new Bitmap(Width, Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
using (Graphics g = Graphics.FromImage(img))
{
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
using (Brush back = new SolidBrush(BackColor))
g.FillRectangle(back, 0, 0, Width, Height);
if (grid != null)
{
PaintContext pc = new PaintContext(grid, g);
grid.Paint(pc, SolutionColor, WallColor, CellColor);
}
}
Invalidate();
}
public void DrawWalls(PaintContext pc, Pen pe)
{
foreach (KeyValuePair <Pt, int> kvp in _walls)
{
Pt pt0 = kvp.Key;
int w = kvp.Value;
Pt[] vs = Vertices(pt0);
Pt[] ns = Neighbours(pt0);
for (int i = 0; i < vs.Length; ++i)
{
Pt pt1 = ns[i];
//if (pt0.CompareTo(pt1) >= 0)
if (GetBit(w, i))
{
Pt v0 = vs[i];
Pt v1 = vs[(i + 1) % vs.Length];
pc.Graphics.DrawLine(pe, pc.Point(v0), pc.Point(v1));
}
}
}
}
//public void FillCell(PaintContext pc, Pt pt)
//{
// FillCell(pc, pt, GetCell(pt) == 0 ? Brushes.Red : Brushes.Green);
//}
public void FillCell(PaintContext pc, Pt pt, Color cellColor)
{
using (Brush br = new SolidBrush(cellColor))
using (Pen pe = new Pen(cellColor))
FillCell(pc, pt, pe, br);
}