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

by

Csaba Nemethi

csaba.nemethi@t-online.de

Contents

Start page

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

Contents     Start page

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

Contents     Start page

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

Contents     Start page