Appcelerator good way to know if in portrait

gistfile1.js

// WTF On iOS for horizontal positions (iPad on a table) there are some bugs : in portrait mode e.source.isPortrait = false, Ti.Gesture.isPortrait = false and Ti.Gesture.orientation = 0 or 5 (even in portrait or landscape) !!!
// so take the old fashioned screen dimensions 
Ti.Gesture.addEventListener('orientationchange', function (e) {
  Alloy.Globals.isPortrait = (Ti.Platform.displayCaps.platformHeight > Ti.Platform.displayCaps.platformWidth);
});