Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 24 Jan 2007 16:52:32 -0600

Paul Sichta wrote:

MEDM 3.1.1 supports the Byte Monitor Object in the UP and the RIGHT
directions, version 3.0.3 supports it in the DOWN and RIGHT directions

My copy of MEDM 3.1.1 supports "down" and "right", and gives a warning
if I set the widget to either "up" or "left".
(medmByte.c).  In 3.0.3 edit mode, you can choose any of the four directions;
at runtime the invalid direction is overridden with the supported one.  The
current MEDM Manual's 'direction attribute' table says the Byte Object can
use all four directions, although the paragraph for the Byte Monitor
describes the direction limitations.
So a display created under 3.0.3 with a medmByte in the UP direction will

generate a warning (in stdout and MEDM Message Window) under 3.1.1 . The

appearance/vertical-alignment of the 'bits' are the same for both medm's, so

it's not too disasterous.

From a glance at the source code changes between the releases and after
some investigation, all that may have changed since 3.0.3 is the
nomenclature used for the directions, to make the widget's behaviour
match the actual wording the user selects.
In 3.1.1 the bit adjacent to the Start Bit is always displayed either
below or to the right of the start bit. However that adjacent bit
number can be higher or lower than the Start Bit depending on whether
the End Bit setting is larger or smaller than the Start Bit setting.
My conclusion: This change was a bug fix, not a regression, and should
not affect the functionality of any existing displays.
- Andrew
--
The right to be heard does not automatically include
the right to be taken seriously. -- Hubert H. Humphrey

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System