Inherit MovieClip From Another Class - actionscript-3

Question

Hey I seem to be having some problems inheriting Movie-clip from a class, I'm fairly new to as3, I've had a look around and can't tell if I'm doing something fundamentally wrong or not.
Let me show you
So I have a class I want to use to move EVERYTHING but the player sprite. So I want everything but the player to extend it. (or so I'm assuming.)
So I declare my class
package code {
import flash.display.*;
import flash.events.*;
import flash.ui.*;
import code.Main;
public class everythingContainer extends MovieClip {
function brackets and so on...
(I'm just importing everything in an attempt to avoid errors)
I then have a class I want to inherit everythingContainer and Movieclip
package code {
import flash.display.*;
import flash.events.*;
import flash.ui.*;
import code.Main;
import code.everythingContainer;
public class Tree1 extends everythingContainer {
Yet when I run this I get the error:
Line 1 5000: The class 'code.Tree1' must subclass 'flash.display.MovieClip' since it is linked to a library symbol of that type.
Why am I getting this error?
Any help would be greatly appreciated!
I haven't got the full code to run yet so there may still be other obvious bugs laying about.
everythingContainer
Full code:
package code {
import flash.display.*;
import flash.events.*;
import flash.ui.*;
import code.Main;
public class everythingContainer extends MovieClip {
var speed: Number = 4;
var wpressed: Boolean = false;
var apressed: Boolean = false;
var spressed: Boolean = false;
var dpressed: Boolean = false;
var xprev:int = 0;
var yprev:int = 0;
public function everythingContainer() {
// constructor code
trace ('Container started');
if(stage) init();
else
this.addEventListener(Event.ADDED_TO_STAGE, init);
}
function init(eventInfo:Event = null):void
{
if(eventInfo != null)
{
this.removeEventListener(Event.ADDED_TO_STAGE, init);
trace ('Container init removed');
}
// constructor code
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyPress);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyRelease);
this.addEventListener( Event.ENTER_FRAME, containerEveryFrame);
}
public function containerEveryFrame (Event): void {
if (stage.contains(Main.player)) {
xprev = this.x;
yprev = this.y;
checkPlayerMovement();
}
}
// check the set keypress variables
public function checkPlayerMovement () : void {
if (wpressed) {
this.y -= this.speed;
}
if (spressed) {
this.y += this.speed;
}
if (apressed){
this.x -= this.speed;
}
if (dpressed) {
this.x += this.speed;
}
}
//assign key presses to variables
public function onKeyPress (event:KeyboardEvent):void {
//up
if (event.keyCode == 87){
wpressed = true;
}
//down
if (event.keyCode == 83) {
spressed = true;
}
//left
if (event.keyCode == 65){
apressed = true;
}
//right
if (event.keyCode == 68) {
dpressed = true;
}
}
//reset key press variables
public function onKeyRelease (event:KeyboardEvent) : void {
//up
if (event.keyCode == 87){
wpressed = false;
}
//down
if (event.keyCode == 83) {
spressed = false;
}
//left
if (event.keyCode == 65){
apressed = false;
}
//right
if (event.keyCode == 68) {
dpressed = false;
}
}
}
}
Main (there's some other stuff going on in here, but at the minute I'm just trying to get the trees working with my other class.)
package code
{
import flash.display.*;
import flash.events.*;
import flash.ui.*;
import flash.geom.Rectangle;
import flashx.textLayout.container.ContainerController;
public class Main extends MovieClip
{
//public static var main
public static var player:PC;
//public static var firstenemy: WolfEnemy;
public static var MainContainer:everythingContainer;
public function Main()
{
// constructor code
trace('main started');
if (stage)
{
init();
}
else
{
this.addEventListener(Event.ADDED_TO_STAGE, init);
}
}
function init(eventInfo:Event = null):void
{
if (eventInfo != null)
{
this.removeEventListener(Event.ADDED_TO_STAGE, init);
trace('Main init removed');
}
MainContainer = new everythingContainer ;
MainContainer.x = stage.stageWidth / 2;
MainContainer.y = stage.stageHeight / 2;
stage.addChild(MainContainer);
player = new PC();
player.x = stage.stageWidth / 2;
player.y = stage.stageHeight / 2;
stage.addChild(player);
//firstenemy = new WolfEnemy();
//firstenemy.x = 100;
//firstenemy.y = 100;
//stage.addChild(firstenemy);
stage.addEventListener( Event.ENTER_FRAME, everyFrameMain);
}
// check if an enemy hits the player.
/*public function enemycollison(): void {
if(firstenemy.hitTestObject(player)){
trace ('hit enemy');
player.health--;
firstenemy.kill();
}
}*/
// manage events that need to haapen globally for every frame
public function everyFrameMain(Event):void
{
/*if (stage.contains(firstenemy)){
enemycollison();
} */
//root.scrollRect = new Rectangle(player.x - 400, player.y - 300, 800, 600);
}
// finish and close game
public function endgame():void
{
}
}
}
and finally my tree class
package code {
import flash.display.*;
import flash.events.*;
import flash.ui.*;
import code.Main;
import code.everythingContainer;
public class Tree1 extends everythingContainer {
public function Tree1()
{
// constructor code
trace ('Tree1 started');
if(stage) init();
else
this.addEventListener(Event.ADDED_TO_STAGE, init);
}
function init(eventInfo:Event = null):void
{
if(eventInfo != null)
{
this.removeEventListener(Event.ADDED_TO_STAGE, init);
trace ('Tree1 init removed');
}
this.addEventListener( Event.ENTER_FRAME, tree1EveryFrame);
}
public function tree1EveryFrame (Event): void {
playercollision();
}
public function playercollision(): void {
if(this.hitTestObject(Main.player)){
trace ('hit wall');
Main.player.x = Main.player.xprev;
Main.player.y = Main.player.yprev;
}
}
}
}

Answer 1

Probably due to linkage errors inside Fla-file.
RMB on library-item: Tree1
Export for ActionScript + Export in frame 1 + "class: code.Tree1"
File/Publish Settings/Actionscript Settings (the small wrench, right of Script-dropdown)
Source Path (add the linkage to where the compiler can find your package-folder), usually for me I crate a folder next to the fla file called src or something like that so the code-file would be found at "/MyProject/src/code/Tree1.as", in that case I add "./src/" inside Source path inside Advanced ActionScript 3.0 settings
Added an example project in Flash CS6 found at url:
https://user.iter.org/filesharing/?uid=927205f7-cdfe-4915-a175-bc87f64af444
that is available for ~40 days.
Project structure in that file:
"/MyProject/DeepInheritage.fla"
"/MyProject/src/code/Foobar.as"
"/MyProject/src/code/Tree1.as"
Foobar.as which extends MovieClip
Tree1 library item which extends Foobar
That should be the exact same thing that you described in your issue, meaning that there is nothing wrong with that approach, it is just a matter of finding what is wrong. Most likely that is due to errors inside FLA-file, but might be something else.
code files:
package code {
import flash.display.MovieClip;
public class Foobar extends MovieClip {
public function Foobar() {
trace("foobar ctor()");
}
}
}
package code {
import flash.display.MovieClip;
public class Tree1 extends Foobar {
public function Tree1() {
trace("Tree1 ctor()");
}
}
}