changes indication

From The x3270 Wiki

A changes indication is a JSON-specific b3270 protocol object that describes the text or attributes that have changed in a particular row. An array of changes objects is an element of an rows indication.

Member Always present? Type Purpose
column yes number Starting column number, with 1 at the left
count no number Number of affected columns
text no string New text
fg no string Foreground color
bg no string Background color
gr no string Graphic rendition

Either a text or count member is always present, but never both. If text is present, then both the displayed text and the attributes have changed. If it is not present, then only the attributes have changed.

For an example, see the screen indication.