grid.cla

unit
class Grid


export drawGrid, eraseGrid, fromPoints, setRC, getRow, getCol, getHeight, getWidth, setHW, setColor, setStartxy, setBG, inside, centerCell

    var startx, starty : int := 1
    var row, col : int := 4
    var xsize, ysize : int := 50
    starty := 1
    var colorv : int := 1
    var bgcolor : int := 31
    
    function getRow : int
	
	result row
    
    end getRow
    
    
    function getCol: int
    
	result col
    
    end getCol
    
    function getHeight : int
    
	result ysize
    
    end getHeight
    
    function getWidth : int
    
	result xsize
    
    end getWidth
    

    procedure setRC (r, c : int)
    
	row := r
	col := c
    
    end setRC
    
    procedure setBG (c : int)
	bgcolor := c
    end setBG

    procedure setHW (h, w : int)
    
	xsize := w
	ysize := h
    
    end setHW
    
    procedure setColor (color : int)
    
	colorv := color
    
    end setColor
    
    procedure setStartxy (x, y : int)

	startx := x
	starty := y 

    end setStartxy
    
    procedure drawGrid

	var x, y : int
	x := startx
	y := starty
	var counter : int := 0
	var counter2 : int := 0

	  Draw.FillBox (startx, starty, startx + (xsize * col), starty + (ysize * col), bgcolor)
	
	loop

	    exit when counter2 = row

	    counter := 0
	    loop
		exit when counter = col

		Draw.Box (x, y, x + xsize, y + ysize, colorv)
		x := x + xsize

		counter := counter + 1

	    end loop

	    y := y + ysize
	    x := startx
	    counter2 := counter2 + 1

	end loop

    end drawGrid
    
    procedure eraseGrid
    
	colorv := colorbg
	drawGrid
	
    end eraseGrid 
    
    function inside (x, y : int) : boolean
    
	var inside : boolean := true
    
	var xrangetop: int := startx + (xsize * col)
	var xrangebot: int := startx
    
	var yrangebot : int := starty
	var yrangetop : int := starty + (ysize * row)
    
	if x < xrangebot or x > xrangetop then 
	   inside := false
	end if
	if y < yrangebot or y > yrangetop then 
	   inside := false
	end if
    
	result inside  
    
    end inside
    
    procedure fromPoints (x, y : int, var row1, col1 : int)
    
	var yrange : int := y - starty
	var xrange : int := x - startx
	 
	row1 := yrange div ysize + 1
	
	col1 := xrange div xsize + +1
    
    end fromPoints
    
    procedure centerCell (r, c : int, var x, y : int)
    
    var xdistance : int := xsize * (c) - (xsize div 2)
    var ydistance : int := ysize * (r) - (xsize div 2)  
    
    x := startx + xdistance
    y := starty + ydistance   
    
    end centerCell

end Grid