ITT Rule IDL Version 7.0 User Manual download pdf (Page 80)

80 Chapter 4: Property Management

Property Attributes iTool Developer’s Guide

of multiple objects are displayed in the property sheet (either because multiple

objects are selected, or because the objects have been grouped).

Note

The iTool developer is responsible for setting this property attribute back to zero.

Use the SET_DEFINED field of the WIDGET_PROPERTYSHEET event structure

to determine when to set the UNDEFINED attribute back to zero.

USERDEF (Get, Set)

A string that represents the value of a user-defined property. See “User Defined

Property Types” on page 73 for details.

VALID_RANGE (Get, Set)

For integer or float types (TYPE = 2 or TYPE = 3), set this keyword to a two- or

three-element vector specifying the [minimum, maximum] or [minimum, maximum,

increment] for valid values of the property.

What is displayed for the property sheet number cell depends upon the following:

• If this attribute is not specified — the property sheet displays an editable text

field where masked editing is enforced, and the range is that of the data type.

The only accepted keystrokes are the ten digits, and the plus and minus signs.

If the float type is specified, the decimal, and “d” and “e” (scientific exponent

notation tokens) are also allowed.

• If a range is specified without an increment — the property sheet displays a

spinner control that allows the user to click, or click and hold the up or down

buttons to change the value. For an integer type, the increment is one. For a

float type, the increment equals approximately 1/100 of the range. For

example, a range of 100 results in an increment of 1. A value is snapped to the

nearest allowable value when a value outside the range, or not equal to an

incremental value, is entered. The editable text field (featuring masked editing)

also allows the user to enter a numerical value.

• If a range and increment are specified — the property sheet displays a slider

with a marker that can be repositioned to change the value. A value is snapped

to the nearest allowable value when a value outside the range, or not equal to

an incremental value, is entered. The increment value must be positive.

Specifying an increment of 0 (zero) is the same as specifying a range without

an increment. The editable text field (featuring masked editing) also allows the

user to enter a numerical value.

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ITT Rule IDL Version 7.0 User Manual Page 80