     @projectTicketTracker = @options.projectTicketTracker
     @usesFeedback = @options.usesFeedback
     super
+
+    @$el.on 'click', '#show_completed_tickets', _.bind(@toggleShowCompleted, @)
   
   render: ->
     tickets = for ticket in @tickets.models

class Roadmap.ShowMilestoneView extends @TicketsView
  supportsSorting: false
  template: HandlebarsTemplates['houston/roadmap/milestone/show']
  
  events:
    'click #show_completed_tickets': 'toggleShowCompleted'
  
  initialize: ->
    @milestone = @options.milestone

      sum_xx += _x * _x
      sum_xy += _x * _y
    m = (n*sum_xy - sum_x*sum_y) / (n*sum_xx - sum_x*sum_x)
    b = (sum_y - m*sum_x) / n
    
    # No progress is being made
    return null if m == 0
