# The cursor/pointer in the whiteboard
class @WhiteboardCursorModel

  constructor: (@paper, @radius=null, @color=null) ->
    @radius ?= 3
    @color ?= "#ff6666" # a pinkish red
    @cursor = null
    @paper

  draw: () =>
    @cursor = @paper.circle(0, 0, @radius)
    @cursor.attr
      "fill": @color
      "stroke": @color
      "opacity": "0.8"
    $(@cursor.node).on "mousewheel", _.bind(@_onMouseWheel, @)

  toFront: () ->
    @cursor.toFront() if @cursor?

  setRadius: (value) ->
    if @cursor?
      @cursor.attr r: value

  setPosition: (x, y) ->
    if @cursor?
      @cursor.attr
        cx: x
        cy: y

  undrag: () ->
    @cursor.undrag() if @cursor?

  drag: (onMove, onStart, onEnd, target=null) ->
    if @cursor?
      target or= @
      @cursor.drag _.bind(onMove, target), _.bind(onStart, target), _.bind(onEnd, target)

  _onMouseWheel: (e, delta) ->
    @trigger("cursor:mousewheel", e, delta)