Dialog Service

components.modal-dialog.js

import Ember from 'ember';

export default Ember.Component.extend({
  dialog: Ember.inject.service(),
  
  actions: {
    close() {
      this.get('dialog').close();
    }
  }

});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['showDialog'],
  showDialog: false
});

controllers.instant-help.js

import Ember from 'ember';

export default Ember.Controller.extend({
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('page', function() {
  	this.route('subpage');
  })
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  dialog: Ember.inject.service(),
  
  actions: {
    instantHelp() {
      this.get('dialog').open('instant-help');
    }
  }
});

services.dialog.js

import Ember from 'ember';

export default Ember.Service.extend({

  applicationRoute() {
    return Ember.getOwner(this).lookup('route:application');
  },

  applicationController() {
    return Ember.getOwner(this).lookup('controller:application');
  },

  open(template, model) {

    this.applicationRoute().render(template, {
      outlet: 'modal',
      into: 'application',
      controller: template,
      model
    });

    const appCtrl = this.applicationController();
    appCtrl.set('showDialog', true);
    appCtrl.addObserver('showDialog', () => { this.close(); });
  },

  close() {

    this.applicationRoute().disconnectOutlet({
      outlet: 'modal',
      parentView: 'application'
    });

    const appCtrl = this.applicationController();
    appCtrl.removeObserver('showDialog');
    appCtrl.set('showDialog', false);
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.display-block {
  display: block;
}

templates.application.hbs

<div class="container">
	<nav class="navbar navbar-default">
		<div class="container-fluid">
			<div class="navbar-header">
				<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#main-nav" aria-expanded="false">
          <span class="sr-only">Toggle navigation</span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
        </button> {{link-to 'App' 'index' class='navbar-brand'}}
			</div>

			<div class="collapse navbar-collapse" id="main-nav">
				<ul class="nav navbar-nav">
					{{#link-to 'index' tagName="li"}}<a>Home</a>{{/link-to}}
          {{#link-to 'page' tagName="li"}}<a>Page</a>{{/link-to}}
				</ul>
				<div class="nav navbar-nav navbar-right">
					<button class="btn btn-default navbar-btn" {{action "instantHelp"}}>Instant Help</button>
				</div>
			</div>
		</div>
	</nav>

	{{outlet}}

</div>

{{outlet 'modal'}}

templates.components.modal-dialog.hbs

<div class="modal fade in display-block" tabindex="-1" role="dialog">
	<div class="modal-dialog" role="document">
		<div class="modal-content">
			{{#if title}}
			<div class="modal-header">
				<button type="button" class="close" aria-label="Close" {{action 'close'}}><span aria-hidden="true">&times;</span></button>
				<h4 class="modal-title">{{title}}</h4>
			</div>
			{{/if}}
			<div class="modal-body">
				{{yield}}
			</div>
			{{#if footer}}
			<div class="modal-footer">
				{{footer}}
			</div>
			{{/if}}
		</div>
	</div>
</div>

templates.index.hbs

<h1>Home Page</h1>

templates.instant-help.hbs

{{#modal-dialog title="Instant Help"}}
<h2>Instant Help Dialog</h2>
{{/modal-dialog}}

templates.page.hbs

<h1>Page</h1>

{{link-to 'Sub Page' 'page.subpage' class='btn btn-default'}}

<hr>

{{outlet}}

templates.page.subpage.hbs

<h1>Sub Page Content</h1>

<button class="btn btn-success" {{action "instantHelp"}}>Open Instant Help Dialog</button>

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {
  	"ember-bootstrap": "0.11.0"
  }
}