   constructor: (width = @GRID_X_SIZE, height = @GRID_Y_SIZE) ->
     @width = width
     @height = height
-    @r = Raphael("canvas", width, height).initZoom()
-    @drawGrid(width, height)
+    @r = Raphael("canvas", width, height)
     @selected = []
     @converters = {}
     @links = []

  # Draws the graph
  #
  draw: =>
    @drawGrid(@GRID_X_SIZE, @GRID_Y_SIZE)
    link.draw() for link in @links
    for key, converter of @converters
      converter.draw()


  # Draw the grid.
  #
  drawGrid: =>
    for i in [1..@width] by @GRID_STEP_SIZE
      # M0   1 L10000   1
      # M0 801 L10000 80
      @r.path("M#{i},0L#{i},#{@height}")
        .attr({stroke : '#ccc'})

    for i in [1..@height] by @GRID_STEP_SIZE
      # M1   0 L1   8000
      # M801 0 L801 8000
      @r.path("M0,#{i}L#{@width},#{i}")
        .attr({stroke : '#ccc'})

  show_attribute_values: =>
