/// <summary>
/// Converts PosXY to a a 1 based position value to a
/// e.g PosX=1, PosY=1 -> 1
/// PosX=2, PosY=1 -> 2
/// </summary>
/// <param name="pos"></param>
/// <param name="layoutDimensions"></param>
/// <returns></returns>
public static int ConvertPosXYToPosition(PosXY posXY, LayoutDimensions layoutDimensions)
{
Debug.Assert(posXY.X > 0);
Debug.Assert(posXY.X <= layoutDimensions.Width);
Debug.Assert(posXY.Y > 0);
Debug.Assert(posXY.Y <= layoutDimensions.Height);
int result = ((posXY.Y - 1) * layoutDimensions.Width) + posXY.X;
Debug.Assert(result > 0);
Debug.Assert(result <= layoutDimensions.NumPositions);
return result;
}
private static void FillGridRow(FillSettings fillSettings, LayoutDimensions layoutDimensions, List<int> list, PosXY topLeft, int gridWidth, int gridHeight)
{
for (int y = 0; y < gridHeight; y++)
{
for (int x = 0; x < gridWidth; x++)
{
AddPositionToList(layoutDimensions, list, topLeft, x, y);
}
if (fillSettings.IsSnake && y < (gridHeight - 1))
{
// In snake mode do the next line in reverse
y++;
for (int x = gridWidth - 1; x >= 0 && x != int.MaxValue; x--)
{
AddPositionToList(layoutDimensions, list, topLeft, x, y);
}
}
}
}
private static int GetPreviousPosition(int currentPos, FillSettings fillSettings, LayoutDimensions layoutDimensions, out bool endOfLine)
{
Debug.Assert(fillSettings.IsGrid == false);
Debug.Assert(currentPos >= 1);
Debug.Assert(currentPos <= layoutDimensions.NumPositions);
PosXY currentPosXY = ConvertPositionToPosXY(currentPos, layoutDimensions);
PosXY nextPosXY = new PosXY();
endOfLine = false;
if (fillSettings.GroupDirection == Direction.Row)
{
if (currentPosXY.X > 1)
{
nextPosXY.X = currentPosXY.X - 1;
nextPosXY.Y = currentPosXY.Y;
}
else
{
nextPosXY.X = layoutDimensions.Width;
nextPosXY.Y = currentPosXY.Y - 1;
endOfLine = true;
}
}
else
{
Debug.Assert(fillSettings.GroupDirection == Direction.Col);
if (currentPosXY.Y > 1)
{
nextPosXY.X = currentPosXY.X;
nextPosXY.Y = currentPosXY.Y - 1;
}
else
{
nextPosXY.X = currentPosXY.X - 1;
nextPosXY.Y = layoutDimensions.Height;
endOfLine = true;
}
}
int nextPos = ConvertPosXYToPosition(nextPosXY, layoutDimensions);
Debug.Assert(nextPos != currentPos);
Debug.Assert(nextPos >= 1);
Debug.Assert(nextPos <= layoutDimensions.NumPositions);
return nextPos;
}
private static void AddPositionToList(LayoutDimensions layoutDimensions, List<int> list, PosXY topLeft, int x, int y)
{
list.Add(ConvertPosXYToPosition(new PosXY(topLeft.X + x, topLeft.Y + y), layoutDimensions));
}
