MoveAndTraceManager

In my latest Game I did a lot of manual positioning for my game UI, so a created this
little class to help me out a bit, and saving some time.

It make it possible to (in AIR Simulator) to click a Starling DisplayObject and moving it around using the keyboard arrows.
position is then copied to Clipboard so you can paste it back in you positioning code.

/**
 * Created by martinbjeld on 8/1/14.
 */
package starling.extensions.managers.moveandtrace {
import flash.system.System;
import flash.ui.Keyboard;

import starling.core.Starling;
import starling.display.DisplayObject;
import starling.events.KeyboardEvent;
import starling.events.Touch;
import starling.events.TouchEvent;
import starling.events.TouchPhase;

public class MoveAndTraceManager {

    // SINGLETON VARS

    private static var _instance:MoveAndTraceManager;
    private static var _allowInstantiation:Boolean;

    public static function getInstance():MoveAndTraceManager {
        if (!_instance) {
            _allowInstantiation = true;
            _instance = new MoveAndTraceManager();
            _allowInstantiation = false;
        }
        return _instance;
    }

    public function MoveAndTraceManager() {
        if (!_allowInstantiation) {
            throw new Error("Error: Instantiation failed: Use SingletonDemo.getInstance() instead of new.");
        }

        trace(" ****************************************************** ");
        trace(" ***** MoveAndTraceManager Initialized. ");
        trace(" ***** REMEMBER TO REMOVE ALL USAGE!!!  ");
        trace(" ****************************************************** ");

        Starling.current.stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
        Starling.current.stage.addEventListener(TouchEvent.TOUCH, onTouch);
        _list = new <DisplayObject>[];
    }
    private var _curTarget:DisplayObject;
    private var _list:Vector.<DisplayObject>

    public function add(starlingDisplayObject:DisplayObject):void {
        _list.push(starlingDisplayObject);
    }

    // CLASS MEMBERS

    private function onTouch(event:TouchEvent):void {
        var t:Touch = event.getTouch(Starling.current.stage, TouchPhase.ENDED);
        if (!t) return;

        var touchObject:DisplayObject = event.target as DisplayObject;

        if (touchObject.name == null && event.shiftKey)
            touchObject.visible = false;

        for each(var obj:DisplayObject in _list) {
            if (obj.name == touchObject.name) {
                _curTarget = obj;
            }
        }
    }

    // ========================================================================================
    // API
    // ========================================================================================

    private function onKeyDown(event:KeyboardEvent):void {

        if (!_curTarget)
            return;

        var amount:int = event.shiftKey ? 10 : 1;

        switch (event.keyCode) {

            case Keyboard.E:
            {
                _curTarget.touchable = false;
                break;
            }
            case Keyboard.LEFT:
            {
                _curTarget.x -= amount;
                break;
            }
            case Keyboard.RIGHT:
            {
                _curTarget.x += amount;
                break;
            }
            case Keyboard.UP:
            {
                _curTarget.y -= amount;
                break;
            }
            case Keyboard.DOWN:
            {
                _curTarget.y += amount;
                break;
            }
        }

        trace("-- " + _curTarget.name + " --");
        trace("x: " + _curTarget.x);
        trace("y: " + _curTarget.y);

        var str:String = _curTarget.name + ".x = " + _curTarget.x + ";\n";
        str += _curTarget.name + ".y = " + _curTarget.y + ";\n";
        System.setClipboard(str);

    }
}
}

If at any time in your development you need to tweak a position of your object you do this.

myStarlingDisplayObject.name = "myStarlingDisplayObject"; // You MUST give the displayObject a name, and it should match the instance name.
MoveAndTraceManager.getInstance().add( myStarlingDisplayObject );

Then you should be able to Click the Starling DisplayObject and use the arrow key to nudge the DisplayObject.
Every time you nudge() the info i copied to your ClipBoard so you can go back to your code and paste:


myStarlingDisplayObject.x = 42;
myStarlingDisplayObject.y = 42;