Adding display objects to the display list
Flash Player 9 and later, Adobe AIR 1.0 and
later
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When
you instantiate a display object, it will not appear on-screen (on
the Stage) until you add the display object instance to a display
object container that is on the display list. For example, in the
following code, the
myText
TextField object would
not be visible if you omitted the last line of code. In the last
line of code, the
this
keyword must refer to a
display object container that is already added to the display list.
import flash.display.*;
import flash.text.TextField;
var myText:TextField = new TextField();
myText.text = "Buenos dias.";
this.addChild(myText);
When you add any visual element to the Stage, that element becomes
a
child
of the Stage object. The first SWF file loaded in
an application (for example, the one that you embed in an HTML page)
is automatically added as a child of the Stage. It can be an object
of any type that extends the Sprite class.
Any display objects that you create
without
using ActionScript—for
example, by adding an MXML tag in a Flex MXML file or by placing
an item on the Stage in Flash Professional—are added to the display
list. Although you do not add these display objects through ActionScript,
you can access them through ActionScript. For example, the following
code adjusts the width of an object named
button1
that
was added in the authoring tool (not through ActionScript):
button1.width = 200;
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