A value of type CellGrid a is a rectangular array of values of type a.

A cell can be in the interior of the grid, on an edge, on in a cornder

CellRenderer is a record that provides the information -- size and color -- that is needed to render a cell to SVG. Color is as defined in the package avh4/elm-color, e.g. Color.rgb 1 0 0, which is bright red.

Construct a Maybe CellGrid from a list of values of type a. Here is a 2x2 cell grid of type Float:

> cg = cellGridFromList 2 2 [1.0,2.0,3.0,4.0]
  Just (CellGrid (2,2) (Array.fromList [1,2,3,4]))
  : Maybe (CellGrid Float)

If the length of the list is incompatible with the given number of rows and columns Nothing is returned.

> cellGridFromList 2 2 [1.0,2.0,3.0,4.0, 5.0]
  Nothing : Maybe (CellGrid Float)

The empty cell grid. Useful in conjunction with Maybe.withDefault

Render a cell grid as Html. The first two parameters are the width and height of the rendered grid in pixels.

Render a cell grid as SVG

Map a function over a CellGrid:

> map (\x -> 2*x) cg
CellGrid (2,2) (Array.fromList [2,4,6,8])

Transform a CellGrid a with a function ((Int, Int) -> a -> a). Used when the transformed value depends on its matrixIndex as well as its value

Fold a reducer (a -> b -> b) over a CellGrid a)

Transform a CellGrid using a function

(Int, Int) -> CellGrid a -> a)

return the type of the cell at location (i,j). Thus classifyCell grid (0,0) = Corner

Return the Maybe value of the cell at (i,j) from grid

> cellAtMatrixIndex (1,1) cg
Just 4 : Maybe Float

Set the value of the cell at location (i,j)