How to call one of the function from this class? - actionscript-3

Question

I wanna call the function "nextMenu" & "prevMenu" from this class from Main.as
But I get the error 1136: Incorrect number of arguments. Expected 1.
Can help me see what I've left out on the codes?
CategoryScroller.as
package com.theflashfactor.carouselStackGallery.categoryMenu
{
import com.greensock.TweenMax;
import com.greensock.easing.Quint;
import com.theflashfactor.utils.Ref;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.MouseEvent;
import flash.geom.Rectangle;
/**
* Scroller to switch view for category item if there are more than visibleItem available
* #author Rimmon Trieu
*/
public class CategoryScroller extends Sprite
{
private var trackLength:int = 400;
private var scrubber:Sprite;
private var track:Shape;
private var categoryMenu:CategoryMenu;
private var trans:Sprite;
private var center:Number;
public function CategoryScroller(categoryMenu:CategoryMenu)
{
this.categoryMenu = categoryMenu;
buttonMode = true;
initialize();
}
/**
* Draw elemnt scrubber and track
*/
private function initialize():void
{
trans = new Sprite();
trans.graphics.beginFill(0, 0);
trans.graphics.drawRect(0, 0, trackLength, 13);
trans.graphics.endFill();
trans.addEventListener(MouseEvent.MOUSE_DOWN, transMouseDown, false, 0, true);
addChild(trans);
// Draw track
var color:uint = uint(Ref.getInstance().getRef("categoryCircleColor"));
track = new Shape();
track.graphics.lineStyle(1, color);
track.graphics.lineTo(trackLength, 0);
track.y = 6;
addChild(track);
// Draw scrubber
scrubber = new Sprite();
scrubber.graphics.beginFill(color);
scrubber.graphics.drawRect(0, 0, 80, 13);
scrubber.graphics.endFill();
center = (trackLength - scrubber.width) >> 1;
scrubber.x = center;
addChild(scrubber);
// Add dragging functionality
scrubber.addEventListener(MouseEvent.MOUSE_DOWN, scrubberMouseDown,false,0,true);
}
private function transMouseDown(event:MouseEvent):void
{
stage.addEventListener(MouseEvent.MOUSE_UP, stageMouseUpHandler,false,0,true);
TweenMax.killTweensOf(scrubber);
categoryMenu.preTransition();
if (mouseX > width - scrubber.width) scrubber.x = (width - scrubber.width); else scrubber.x = mouseX;
}
/*private function transMouseUp(event:MouseEvent):void
{
stage.removeEventListener(MouseEvent.MOUSE_UP, stageMouseUpHandler);
checkPosition();
}*/
private function scrubberMouseDown(event:MouseEvent):void
{
event.stopImmediatePropagation();
TweenMax.killTweensOf(scrubber);
scrubber.startDrag(false, new Rectangle(0, 0, trackLength - scrubber.width, 0));
stage.addEventListener(MouseEvent.MOUSE_UP, stageMouseUpHandler,false,0,true);
categoryMenu.preTransition();
}
private function stageMouseUpHandler(event:MouseEvent):void
{
stage.removeEventListener(MouseEvent.MOUSE_UP, stageMouseUpHandler);
scrubber.stopDrag();
checkPosition();
}
private function checkPosition():void
{
var targetX:Number = (trackLength - scrubber.width) >> 1;
if (scrubber.x > (center + 20)) categoryMenu.postTransition(1);
else
if (scrubber.x < (center - 20)) categoryMenu.postTransition(-1);
else
categoryMenu.postTransition(0);
TweenMax.to(scrubber, .5, {x:targetX, ease:Quint.easeOut, overwrite:1});
}
public function nextMenu():void
{
categoryMenu.postTransition(1);
}
public function prevMenu():void
{
categoryMenu.postTransition(-1);
}
}
}
I've inserted the code below in my Main.as to call the function which I can't get it success.
import com.theflashfactor.carouselStackGallery.categoryMenu.CategoryScroller;
private var categoryScroller:CategoryScroller = new CategoryScroller();
categoryScroller.nextMenu();
Main.as
package
{
import com.theflashfactor.carouselStackGallery.CarouselStackGallery;
import com.theflashfactor.carouselStackGallery.categoryMenu.CategoryMenu;
import com.theflashfactor.carouselStackGallery.categoryMenu.CategoryScroller;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Rectangle;
import org.casalib.events.LoadEvent;
import org.casalib.load.DataLoad;
/**
* Main document class
* #author Rimmon Trieu
*/
[SWF(frameRate="60", backgroundColor="0", pageTitle="3D Carousel Stack Gallery")]
public class Main extends Sprite
{
private var xmlPath:String = "../xml/Main.xml";
private var ts3:Sprite = new Sprite;
private var categoryMenu:CategoryMenu = new CategoryMenu();
private var categoryScroller:CategoryScroller = new CategoryScroller();
public function Main()
{
stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.NO_SCALE;
addEventListener(Event.ADDED_TO_STAGE, addToStage);
}
private function addToStage(event:Event):void
{
removeEventListener(Event.ADDED_TO_STAGE, addToStage);
var xmlLoad:DataLoad = new DataLoad(xmlPath);
xmlLoad.addEventListener(LoadEvent.COMPLETE, xmlLoaded);
xmlLoad.start();
ts3.graphics.beginFill(0x555555,1);
ts3.graphics.drawCircle(0, 0, 50);
ts3.graphics.endFill();
}
private function xmlLoaded(event:LoadEvent):void
{
event.target.removeEventListener(LoadEvent.COMPLETE, xmlLoaded);
opaqueBackground = uint(event.target.dataAsXml.settings.#backgroundColor);
var gallery:CarouselStackGallery = new CarouselStackGallery(event.target.dataAsXml);
addChild(gallery);
addChild(ts3);
ts3.addEventListener(MouseEvent.MOUSE_DOWN, ts3MouseDown,false,0,true);
}
private function ts3MouseDown(event:MouseEvent):void
{
categoryScroller.nextMenu();
}
}
}

Answer 1

As defined:
public function CategoryScroller(categoryMenu:CategoryMenu)
{
...
Shouldn't the class constructor be expecting an argument??
private var categoryScroller:CategoryScroller = new CategoryScroller();