Adobe 12040118 - After Effects Standard Using Manual page 215

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Properties
Following are the properties defined for each element types listed above.
Property Type
Boolean
active
Bounds
bounds
Object
children
Boolean
enabled
Number
jumpdelta
String
justify
Number
maxvalue
Number
minvalue
Object
parent
Bounds
placement
Number
stepdelta
String
text
String
textselection
String
type
Boolean
value
Using Help
Creating User Interface Elements
Description
Contains true if the object is active, false otherwise. An active floating dialog
is the front-most dialog. A modal dialog that is visible is by definition the
active dialog. An active control is the one which will accept keystrokes, or in
the case of a Button, be activated (clicked) when the user types a return. Set
this true to make a given control or dialog active.
Contains a Bounds object describing the location and size of the element as
array values representing the coordinates of the upper left and lower right
corners of the element: [left, top, right, bottom]. These are screen coordinates
for window elements, and window-relative coordinates for other elements.
See "Element Size and Location "
for a definition of the Bounds object.
The collection of UI elements that the UI object contains. This is an array
indexed by number or by a string containing an element's name. The length
property of this array is the number of child elements for container elements
and is zero for controls; future implementations may return additional ele-
ments for composite controls. Read only.
Contains true if the object is enabled, false otherwise. If set to true, control
elements will accept input. If set to false, control elements will not accept
input, and all types of elements may change to a 'grayed-out' appearance.
Contains the value to increment or decrement a Scrollbar element's position
by, when the user clicks ahead or behind the moveable element of the Scroll-
bar to make the scroll position 'jump' .
Controls justification of text in static text and edit text controls. The value is
either "left" , "center" , or "right" and the default value is left-justified. Some
implementations may not fully support this property, and it may be ignored
for some types of controls.
Contains the maximum value that the value property can have. If maxvalue
is reset less than value, value will be reset to maxvalue. If maxvalue is reset less
than minvalue, minvalue will be reset to maxvalue.
Contains the minimum value that the value property can have. If minvalue is
reset greater than value, value will be reset to minvalue. If minvalue is reset
greater than maxvalue, maxvalue will be reset to minvalue.
The parent object of a UI object. This property returns null for window
objects. Read only.
An alternate name for the bounds property; bounds is the preferred name,
and use of placement is deprecated.
Contains the value to increment or decrement a Scrollbar element's position
by, when a stepper button at either end of the scrollbar is clicked.
The title, label or text. May be ignored for certain window types. For controls,
its usage depends on the control type. Many controls like buttons use the
text as a label, while other controls, such as edit fields, use the text to access
its content.
Replace the current text selection with the specified text string, modifying
the value of the text property. If there is no selection, the specified text is
inserted into the text property string at the current insertion point. Reading
the textselection property returns any selected text, or an empty string if
there is no selection.
Contains the type name of the element. For Window objects, this is the value
of the first argument to the Window constructor function. For controls, this is
the value of the first argument to the add() method. Read only.
(for Checkbox and RadioButton) true if the control has been set (i.e., a check-
box shows a check mark), false if not set.
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