prepare animation

gistfile1.js

require('TransformJS');
require('jquery-easing');
Y$.DialogTransitions = SC.Mixin.create({
  easing: 'easeInOutQuint',
  prepareForDialogAnimateIn: function() {
    return this.$().animate({
      translateY: "+=" + Y$.viewport.height
    }, 0);
  },
  dialogAnimateIn: function() {
    var $dialog, windowHeight;
    $dialog = this.$();
    windowHeight = Y$.viewport.height;
    return $dialog.animate({
      translateY: "-=" + windowHeight
    }, 350, this.easing);
  },
  dialogAnimateOut: function(callback) {
    var $dialog, windowHeight;
    $dialog = this.$();
    windowHeight = Y$.viewport.height;
    return $dialog.animate({
      translateY: "+=" + windowHeight
    }, 350, this.easing, callback);
  }
});