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CHAPTER 2: The Illustrator Scripting Object Model Dynamic objects 25

Dynamic objects

By creating dynamic objects, you can create data-driven graphics. In the Illustrator application, you use the

Variables panel to create or edit variables like graph data, linked file, text string, and visibility, or variables

whose type is not specified. In scripting, you use the

variable object to represent this type of variable.

The

variable object’s kind property indicates the type of dynamic data that a variable object holds.

variable objects are document-level objects; you create them in a document object.

OTE: Do not confuse variable objects with scripting variables. For details on Illustrator variables,

dynamic objects, and data-driven graphics, see Illustrator Help.

Datasets, which collect variables and their associated dynamic data into one object, are represented in

scripting by the

dataset object. The dataset object provides methods to update and delete dataset

objects in your scripts.

Symbols

In Illustrator, symbols are art items that are stored in the Symbols panel. Your scripts can create, delete, and

duplicate

symbol objects. When you create symbol objects in your script, Illustrator adds them to the

Symbols panel for the target document.

symbol item is an instance of a symbol object in a document. Each symbol item is linked to its symbol

definition, so changing the definition of a symbol updates all instances of the symbol.

Your script can create, delete, and duplicate symbol items. Symbol items are Illustrator art items; therefore,

they can be treated in the same way as other art items or page items. You can rotate, resize, select, lock,

hide, and perform other operations on symbol items.

Transformations

The matrix object provides access to the power of geometric-transformation matrices. Transformation

matrices in Illustrator store the settings of an operation that scales, rotates, or moves (translates) an object

on a page. There are advantages to using matrices:

X By storing transformation values in a matrix object, you can use the values repeatedly on different

objects in your script.

X By concatenating rotation, translation, and/or scaling matrices and applying the resulting matrix, you

can perform many geometric transformations with only one script statement.

X You can invert matrix values.

X You can compare the values of two matrices.

The

application object. has commands or methods to create, get, invert, compare, or concatenate

matrices.

The command or method used to apply a matrix is the

transform command, which belongs to any type

of object on which transformations can be performed.

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EDOBE XDOM TPC Informations techniques Page 25