ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller

Question

I've tried variations in the code below i.e. switching from stage to this.stage or even root.stage, but no luck.

The full error I get is:

    ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/setChildIndex()
at flash.display::Stage/setChildIndex()
at Banner/next_image_loaded()

package {
    import flash.display.*;
    import flash.events.*;
    import flash.net.*;
    import flash.utils.*;
    import gs.*;
    import gs.easing.*;

public class Banner extends MovieClip
{
    var xml_url:URLRequest;
    var xml_loader:URLLoader;
    var img_loader:Loader;
    var img_data:Array;
    var img:Bitmap;
    var new_img:Bitmap;
    var strapline:strap;
    var banner:bottom_banner;
    var button:tech_button;
    var current_image:Number = -1;
    var done:Boolean = false;

    public function Banner()
    {
        this.xml_url = new URLRequest("Banner.xml");
        this.xml_loader = new URLLoader(this.xml_url);
        this.xml_loader.addEventListener(Event.COMPLETE, this.xml_loaded);
        this.xml_loader.addEventListener(IOErrorEvent.IO_ERROR, this.err);
        return;
    }// end function

    private function xml_loaded(event:Event)
    {
        this.img_data = new Array();
        var _loc_2:* = new XML(event.target.data);
        var _loc_3:* = 0;
        while (_loc_3 < _loc_2.image.length())
        {

            this.img_data.push(_loc_2.image[_loc_3]);
            _loc_3 = _loc_3 + 1;
        }
        this.img_data = this.randomise_array(this.img_data);
        this.next_content();
        return;
    }// end function

    private function randomise_array(param1:Array) : Array
    {
        var _loc_2:* = new Array();
        while (param1.length > 0)
        {

            _loc_2.push(param1.splice(Math.floor(Math.random() * param1.length), 1));
        }
        return _loc_2;
    }// end function

    private function next_content()
    {
        if (this.current_image == (this.img_data.length - 1))
        {
            this.current_image = 0;
        }
        else
        {
            var _loc_2:* = this.current_image + 1;
           this.current_image = _loc_2;
        }
        this.img_loader = new Loader();
        this.img_loader.contentLoaderInfo.addEventListener(Event.COMPLETE, this.next_image_loaded);
        this.img_loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, this.err);
        this.img_loader.load(new URLRequest(this.img_data[this.current_image]));
        return;
    }// end function

    private function next_image_loaded(event:Event)
    {
        var _loc_2:Number = 0;
        this.new_img = event.target.content;
        stage.addChild(this.new_img);
        if (this.strapline)
        {
            stage.setChildIndex(this.strapline, (stage.numChildren - 1));
        }
        if (this.banner)
        {
            stage.setChildIndex(this.banner, (stage.numChildren - 1));
        }
        if (this.button)
        {
            stage.setChildIndex(this.button, (stage.numChildren - 1));
        }
        if (this.current_image == 0 && this.done != true)
        {
            this.button = new tech_button();
            this.button.x = 28;
            this.button.y = 257;
            //stage.addChild(this.button);
            var _loc_3:Boolean = true;
            this.button.buttonMode = true;
            this.button.useHandCursor = _loc_3;
            this.button.addEventListener(MouseEvent.CLICK, this.goToTechPage);
            TweenLite.from(this.button, 0.5, {alpha:0, delay:1.5});
            this.banner = new bottom_banner();
            this.banner.x = 0;
            this.banner.y = stage.stageHeight - 40;
            stage.addChild(this.banner);
            this.strapline = new strap();
            this.strapline.x = 232;
            this.strapline.y = 195;
            stage.addChild(this.strapline);
            TweenLite.from(this.strapline, 1, {x:stage.stageWidth, ease:Expo.easeOut, delay:0.75, onComplete:this.fade_strap});
            this.done = true;
        }
        else
        {
            _loc_2 = 0.75;
        }
        TweenLite.from(this.new_img, 1, {autoAlpha:0, ease:Expo.easeOut, onComplete:this.swap_clips, delay:_loc_2});
        return;
    }// end function

    private function goToTechPage(event:MouseEvent) : void
    {
        navigateToURL(new URLRequest("report.htm"), "_self");
        return;
    }// end function

    private function fade_strap()
    {
        TweenLite.to(this.strapline.bg_mc, 1.5, {alpha:0.85});
        return;
    }// end function

    private function remove_strap()
    {
        this.strapline.parent.removeChild(this.strapline);
        this.strapline = null;
        return;
    }// end function

    private function swap_clips()
    {
        if (this.img)
        {
            stage.removeChild(this.img);
        }
        this.img = this.new_img;
        this.new_img = null;
        setTimeout(this.next_content, 6500);
        return;
    }// end function

    private function err(event:IOErrorEvent)
    {
        if (this.img_data)
        {
            this.next_content();
        }
        return;
    }// end function

}

why did you comment out stage.addChild(this.button);? I expect since the button is allocated, this one is THE line with error. — Vesper

Simon McArdle Simon McArdle · Accepted Answer · 2012-10-02T12:52:47

This is a lot of code for someone to have to read through, you can narrow down where the error is occurring using trace("trace 1") at key points in your code (change the number each time). When you execute your code the output window will show your traces ie:

trace 1
trace 2
trace 3
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller

This tells you the error occurred some time after the third trace. The error you get tells you it is happening in the next_image_loaded function so try running a few traces in there and update your post with the results.

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller

2 Answers