Config Library: 4.2 Object Class Reference: PrefValueClass

PrefValue objects behave like GenValue objects except that they have the ability to store an "original" value in the PVI_originalValue instance data field. Unlike GenValue objects, PrefValues can only handle single word values.

Code Display 22-5 PrefValueClass Instance Data

@class PrefValueClass, PrefClass;

@instance word  PVI_originalValue = 0;

@vardata void  ATTR_PREF_VALUE_ORIG_IS_INDETERMINATE;

@vardata word ATTR_PREF_VALUE_ROUND;
/* Specifies an integer value to which the value will be rounded on .INI file
 * reads/writes. For instance, with a value for 10 here, the value would always
 * round off to the nearest 10. Note that the user can still type in an illegal
 * value, but this value will be rounded before saving to the .INI file.*/

MSG_PREF_VALUE_SET_ORIGINAL_VALUE

void MSG_PREF_VALUE_SET_ORIGINAL_VALUE(
        word 		orig,
        Boolean 		indeterminate);

This message sets the "original" value of the object--it also sets the value stored by the superclass.

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4.3 PrefItemGroupClass