Multi-Entry Widgets for Real Numbers in Fixed-Point Format
Author: Csaba Nemethi
Keywords: mentry, widget, real number

# Multi-Entry Widgets for Real Numbers
in Fixed-Point Format

## For Mentry Version 3.7

### by

## Csaba Nemethi

## Contents

- The `mentry::fixedPointMentry` Command
- The `mentry::putReal` Command
- The `mentry::getReal` Command

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## The `mentry::fixedPointMentry` Command

NAME
  `mentry::fixedPointMentry` – Create and manipulate mentry widgets for real numbers in fixed-point format
SYNOPSIS

      mentry::fixedPointMentry pathName count1 count2 ?-comma? ?options?

DESCRIPTION
  This command creates a new mentry widget `pathName` for displaying and editing real numbers in fixed-point format, with `count1` characters before and `count2` digits after the decimal point. Both `count1` and `count2` must be positive integers. The mentry will have two entry children, separated by a label displaying a `"."` character by default; the optional `-comma` switch changes the label text to `","`. The supported `options` are the same as in the case of the `mentry::mentry` command.
  The command sets the `type` attribute of the widget to the value `"FixedPoint"` and returns the name of the newly created widget.
KEYWORDS
  mentry, widget, real number

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## The `mentry::putReal` Command

NAME
  `mentry::putReal` – Output a real number to a mentry of type `"FixedPoint"`
SYNOPSIS

      mentry::putReal number pathName

DESCRIPTION
  This command outputs the real number `number` to the mentry widget `pathName`, which must have been created with the `mentry::fixedPointMentry` command (this is checked by examining the widget's `type` attribute, which must have the value `"FixedPoint"`).
  The command generates an error if the number does not fit into the widget because it has too many characters before the decimal point.
KEYWORDS
  mentry, widget, real number

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## The `mentry::getReal` Command

NAME
  `mentry::getReal` – Get a real number from a mentry of type `"FixedPoint"`
SYNOPSIS

      mentry::getReal pathName

DESCRIPTION
  This command returns the number contained in the mentry widget `pathName`, which must have been created with the `mentry::fixedPointMentry` command (this is checked by examining the widget's `type` attribute, which must have the value `"FixedPoint"`).
  If both entry children of the widget are empty, the command sets the focus to the first entry child, generates an error, and returns the string `"EMPTY"`.
KEYWORDS
  mentry, widget, real number

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