Apple AppleScript Finder Guide User Manual download pdf (Page 27)

Using Object Class Deﬁnitions 15

CHAPTER 2

Finder Objects 2

Figure 2-0

Listing 2-0

Table 2-0

This chapter begins with a summary of the format used in object class deﬁni-

tions and an introduction to the Finder application object, the outermost

container for most other Finder objects. The last section of the chapter provides

complete descriptions of the object classes deﬁned by the Finder.

Using Object Class Deﬁnitions 2

Object class deﬁnitions describe what objects that belong to a particular class

have in common. Each deﬁnition contains at least ﬁve kinds of information:

properties, element classes, commands handled, default value class returned,

and one or more examples. These categories are brieﬂy described here, using

examples from the deﬁnition of File that begins on page 61.

For a more detailed discussion of object classes and references to objects, see

the AppleScript Language Guide.

Properties 2

A property of an object is a characteristic that has a single value, such as the

name of a window or the modiﬁcation date of a ﬁle. Properties are contained

by objects in much the same way that elements are (see “Element Classes” on

page 16). The main difference is that each of an object’s properties has only one

value, whereas an object may have many different elements of a single class.

Properties of an object are distinguished from each other by their unique labels.

For example, the script that follows sets the Position property of the ﬁle MyFile,

causing the icon for that ﬁle to move to the speciﬁed position.

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Apple AppleScript Finder Guide User Manual Page 27