call-method-on-modal

components.my-modal.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  init () {
    this._super(...arguments);
    // register the modal with the parent
    this.get('registerModal')(this);
  },
  
  show () {
  	// alert('modal::show was called!');
    this.set('isShowing', true);
  },
  
  hide () {
  	// alert('modal::hide was called!');
    this.set('isShowing', false);
  }
  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  
  appName: 'Ember Twiddle',
  
  actions: {
    registerModal (name, modal) {
  	  this.set(name, modal);
      // alert('modal was registered');
    },
    showModal () {
      // alert('show modal');
      this.get('fooModal').show();
    },
    hideModal () {
      // alert('hide modal');
      this.get('fooModal').hide();
    }
  }
  
});

templates.application.hbs

<h1>This is the application template</h1>

<button {{action 'showModal'}}>Show</button>
<button {{action 'hideModal'}}>Hide</button>
<br>
<br>
{{my-modal registerModal=(action 'registerModal' 'fooModal')}}
<br>
<br>

templates.components.my-modal.hbs

{{#if isShowing}}
	Modal is showing
{{else}}
	Modal is hidden
{{/if}}

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}