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POAccess a parent class in an OOP correct way
 

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    <p>I just started programming OOP and I'm running into a scope problem. In the following project, I have a masterClass called App. The App-class has Screens:Screen-class and a Navigation-class as it's children. From the navigation class I want to control which screens will be displayed. I don't know how to do this...</p> <p>Please check the code to fully understand my intentions</p> <p>Your help is really appreciated, I'd love to really learn programming and not just a dirty solution :) but all suggestions are welcome!</p> <pre><code>// Main Class // public class App extends Sprite { private var screens:Array; private var screen1:Screen; private var screen2:Screen; private var screen3:Screen; private var screen4:Screen; public var currentScreen:String; // private var navigation:Navigation; public function App() { init(); } private function init():void { buildScreens(); buildNavigation(); } private function buildScreens():void { screen1 = new Screen(); screen1.name = 'startScreen'; currentScreen = screen1.name; addChild(screen1); screen2 = new Screen(); screen2.name = 'irrelevantA'; screen3 = new Screen(); screen3.name = 'irrelevantB'; screen4 = new Screen(); screen4.name = 'irrelevantC'; screens = new Array(screen1, screen2, screen3, screen4); } private function buildNavigation():void { navigation = new Navigation(screens); } } // Screen Class // public class Screen extends Sprite { public function Screen() { // creates a new screen } } // Navigation Class // public class Navigation extends Sprite { private var buttons:Array; public function Navigation(screens:Array) { addButtons(screens); } private function addButtons(screens:Array):void { buttons = new Array(); for each(var screen:Screen in screens) { var button:Button = new Button(); button.link = screen.name; button.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown); buttons.push(button); } } private function mouseDown(e:MouseEvent):void { // THIS IS WHAT MY QUESTION IS ABOUT: How should I talk to the parent class in an OOP correct way? // and how can I add and remove a screen in the App class from here? // Here some of my tries // I don't think using parent to get there is a good way because next time it might be; parent.parent.parent trace(e.target.parent.parent.currentScreen); this.parent.currentScreen; stage.App.currentScreen; App.currentScreen; //--------------------------------- } } // Button Class // public class Button extends Sprite { public var link:String; public function Button() { // creates a new button } } </code></pre>
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