Adobe Extending Flash Professional CS4 Manuale Utente Scaricare il pdf (Pagina 33)

EXTENDING FLASH CS4 PROFESSIONAL

Introduction

All the objects in the DOM that aren’t listed in the previous table (see “The Flash Document Object Model” on page 9)

are accessed from the Document object. For example, to access the library of a document, you use the

document.library property, which retrieves a library object:

fl.getDocumentDOM().library

To access the array of items in the library, you use the library.items property; each element in the array is an Item

object:

fl.getDocumentDOM().library.items

To access a particular item in the library, you specify a member of the library.items array:

fl.getDocumentDOM().library.items[0]

In other words, the library object is a child of the Document object, and the Item object is a child of the library object.

For more information, see

document.library, library object, library.itemslibrary.items, and Item object.

Specifying the target of an action

Unless otherwise specified, methods affect the current focus or selection. For example, the following script doubles the

size of the current selection because no particular object is specified:

fl.getDocumentDOM().scaleSelection(2, 2);

In some cases, you might want an action to specifically target the currently selected item in the Flash document. To do

this, use the array that the

document.selection property contains (see document.selection). The first element in

the array represents the currently selected item, as shown in the following example:

var accDescription = fl.getDocumentDOM().selection[0].description;

The following script doubles the size of the first element on the Stage that is stored in the element array, instead of the

current selection:

var element = fl.getDocumentDOM().getTimeline().layers[0].frames[0].elements[0];

if (element) {

element.width = element.width*2;

element.height = element.height*2;

}

You can also do something such as loop through all the elements on the Stage and increase the width and height by a

specified amount, as shown in the following example:

var elementArray =

fl.getDocumentDOM().getTimeline().layers[0].frames[0].elements;

for (var i=0; i < elementArray.length; i++) {

var offset = 10;

elementArray[i].width += offset;

elementArray[i].height += offset;

}

Summary of the DOM structure

The following list displays the DOM structure in outline format. Numbers at the beginning of each line represent the

level of an object. For example, an object preceded by “03” is a child of next highest “02” object, which, in turn, is a

child of the next highest “01” object.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 559 560

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Adobe Extending Flash Professional CS4 Manuale Utente Pagina 33

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