$setDisplayStr(<number:string>)
$setDisplayInt(<number:integer>)
$setDisplayDouble(<number:double>)
$setMode(<mode:string>)
$setSegmentStyles(<style:string>)
$setNumDigits(<number:integer>)
<boolean> $checkOverflow()
$setSmallDecimalPoint(<bflag:boolean>)
<boolean> $checkOverflow(<number:integer>)