example.html

<wizard class="form-horizontal" id="timeline">
<step title="Welcome">
	<label for="title">Title (required):</label>
	<input type="text" name="title" id="title" class="form-control"
	required placeholder="Your Timeline Title" ng-model="currEL.title" />
	<ul ng-show="$$prevSibling.step.title.$dirty && $$prevSibling.step.title.$invalid" class="ng-error-list">
		<li ng-show="$$prevSibling.step.title.$error.required">An eventline, definitely, needs a title. Don't you think?</li>
	</ul>
	<!-- TODO: maybe use errors like this for every step -->
	<!-- <errors> -->
	<!-- 	<error for="title" on="required">An eventline, definitely, needs a title. Don't you think?</error> -->
	<!-- </errors> -->
</step>
<step title="Add Events">
	<!-- .. -->
</step>
<step title="Finish">
	<!-- .. -->
</step>
</wizard>

step.html

<div class="step-pane" ng-class="{active: active}" ng-transclude id='{{title | lowercase}}' ng-form="step">
	<!-- TODO: filter should convert title to snake case -->
</div>

wizard.html

<form novalidate class='{{class}}' id='{{id}}' name='{{id}}'>
	<div class="wizard clearfix">
		<ul class="steps">
			<li ng-repeat='step in steps()' ng-class='{active: step.active}' data-target='#{{step.title | lowercase}}'><span class="badge" ng-class="{'badge-info': step.active}">{{step.id}}</span>{{step.title}}</li>
		</ul>
	</div>

	<div class="step-content">
		<div ng-transclude></div>
		<div class="actions m-t">
			<button type="button" ng-disabled="current().id < 2" class="btn btn-default btn-sm btn-prev" ng-click="prev()">Prev</button>
			<button type="button" ng-disabled="stepIsInvalid()" class="btn btn-default btn-sm btn-next" ng-click="next()" data-next="Next" data-last="Finish">Next</button>
		</div>
	</div>
</form>

wizard.js.coffee

@app.directive "wizard", ->
  restrict: "EA"
  replace : true,
  require: "wizard"
  transclude: true
  controller: "WizardCtrl"
  templateUrl: "wizard.html"
  scope: {
    id: "@"
    class: "@"
  }
  link: (scope, element, attrs, wizardCtrl) ->
    wizardCtrl.addWizard scope, element


@app.directive "step", ->
  require: "^wizard"
  restrict: "EA"
  transclude: true
  replace: true
  templateUrl: "step.html"
  scope: {
    active: "=?"
    title: "@"
  }
  link: (scope, element, attrs, wizardCtrl) ->
    wizardCtrl.addStep scope, element
    # when the scope is destroyed then remove the step from current steps array
    scope.$on '$destroy', ->
      wizardCtrl.removeStep scope
    # keep a watch on when this step becomes active
    # scope.$watch 'active', (active) ->
    #   wizardCtrl.select(scope) if active

@app.controller 'WizardCtrl', ($scope) ->
  # some needed variables
  steps = @steps = []
  @currentStep = null
  destroyed = false
  @element = null

  # some utility functions
  @stepId     = (step) -> steps.indexOf(step)
  @totalSteps = -> steps.length
  @hasSteps   = -> @totalSteps > 0
  @lastStep   = -> steps[@totalSteps - 1]

  # add the wizard a.k.a. store somethings..
  @addWizard = (wizard, element) ->
    $scope.$element = element
    # find out the next and previous buttons
    @nextBtn = element.find(".actions .btn-next")
    @prevBtn = element.find(".actions .btn-prev")
    @nextBtn.on 'click', @moveForward
    @prevBtn.on 'click', @moveBackward

  # add a step to the wizard
  @addStep  = (step, element) ->
    step.id = steps.length + 1
    step.$element = element
    steps.push step
    stepContent = element.closest(".step-content")
    @activateStep step if steps.length is 1 or step.active

  # remove a step from the wizard
  @removeStep = (step) ->
    index = @stepId(step)
    steps.splice index, 1
    # activate the previous step when this step was removed
    previousIndex = if index >= @totalSteps then index - 1 else index
    @activateStep steps[previousIndex]

  # select a step and make it active
  @activateStep = (step) ->
    step.active = true
    @currentStep = step

  @stepIsValid = -> 
    @currentStep.step.$dirty && @currentStep.step.$valid

  @moveForward = ->
    console.log 'moving forward'

  @moveBackward = ->
    console.log 'moving backward'

  @moveTo = (step) ->
    console.log 'moving to given step'

  # set a flag to know when this directive is being destroyed..
  $scope.$on '$destroy', -> destroyed = true
  # expose certain methods..
  $scope.steps    = -> steps
  $scope.current  = => @currentStep
  $scope.isActive = (step) => @currentStep == step
  $scope.select   = (step) => @activateStep step
  $scope.stepIsInvalid = => not @stepIsValid()

  return