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AS3: Can't copy DisplayObjects with content?

How to copy displayed objects (sprites, movie clips, etc.), saving their contents (graphics, added display objects, etc.) in AS3? The most commonly proposed Kirupa solution (http://www.kirupa.com/forum/showpost.php?p=1939827&postcount=172) does not seem to copy graphic or child display objects:

// create a sprite
var s:Sprite = new Sprite();
// add a text field
var tf:TextField = new TextField();
tf.text = "nisse";
s.addChild(tf);
// draw something
s.graphics.lineStyle(1, 0x00FF00);
s.graphics.drawCircle(10, 10, 10);
s.x=100;
// add it to parent
this.addChild(s);       

// create a copy using Kirupas duplicate display object solution    
var sCopy:Sprite = duplicateDisplayObject(s, true) as Sprite;
sCopy.x = 200; 
// confirem that the copy exists:
trace(sCopy);
// add to parent
this.addChild(sCopy); // <- works, but the original textfield and graphics are gone!

Is there any for this? (If not, why? Is not the displayed object represented by the memory area that can be copied like any other object?)

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5 answers

Short answer:

. , , , , . ( , , .)

:

DisplayObject - , . , , .. , , , , . , , ? - , , , ? , ? Et cetera, et cetera.

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, IExternalizable (http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/utils/IExternalizable.html)

, AMF. : readExternal writeExternal. , writeExternal ByteArray, , AMF ByteArray readExternal, . ObjectUtil.copy() (http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/utils/ObjectUtil.html?filter_flex=4.1&filter_flashplayer=10.1&filter_air=2#copy()), Flex SDK, :

function copy(value:*):*{
  var buffer:ByteArray = new ByteArray();
  buffer.writeObject(value);
  buffer.position = 0;
  var result:Object = buffer.readObject();
  return result;
}

, readObject writeObject ByteArray , ObjectUtil.

, , AMF , , :

registerClassAlias("com.example.ExampleClass", com.example.ExampleClass);

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Display , :

FP 10, Graphics .

public function copyFrom(sourceGraphics:Graphics):void

(http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/Graphics.html#copyFrom())

, , . copy(). , Sprite MovieClip, copyFrom(). .

.

public function drawGraphicsData(graphicsData:Vector.<IGraphicsData>):void

(http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/Graphics.html#drawGraphicsData())

( JSON DTO), IExternalizable, Object Graphics, . , , copy(), , , - copy(). , FP9, . , , . , .

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, AS3 - , , , - clone():) , , .

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You cannot make an exact copy, but you can easily create a surrogate bitmap. Which works for me in most cases (fills, thumbnails, etc.)

See the Drawmap BitmapData method.

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var newObject:DisplayObject;
newObject = originalObject;

addChild(newObject);

This is how I do it. It worked with all types of display objects (mc, sprites, textField, etc.)

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