$ListImg: Difference between revisions

From m204wiki
Jump to navigation Jump to search
(Automatically generated page update)
(Automatically generated page update)
Line 66: Line 66:
<li>[[Sirius functions]]</li>
<li>[[Sirius functions]]</li>
<li>[[Fast/Unload User Language Interface]]</li>
<li>[[Fast/Unload User Language Interface]]</li>
<li>[[Janus Open Client]]</li>
<li>[http://m204wiki.rocketsoftware.com/images/4/4a/JoclrNew.pdf Janus Open Client]</li>
<li>[[Janus Open Server]]</li>
<li>[[Janus Open Server]]</li>
<li>[[Janus Sockets]]</li>
<li>[[Janus Sockets]]</li>

Revision as of 23:44, 12 September 2013

Associate an image with a $list

Note: Most Sirius $functions have been deprecated in favor of Object Oriented methods. The OO equivalent for the $ListImg function is BindImage.

This function returns a 0 indicating that the image has been associated with the $list or a negative number indicating that an error has occurred.

The $ListImg function accepts two arguments and returns a numeric result. It is a callable $function.

The first argument is a $list identifier. This is a required argument.

The second argument can be a string containing the name of an image, or it can be any image item from the required image. This is a required argument.

Syntax

[%RESULT =] $ListImg(list_identifier, image_id)

%result is a string that contains a 0, or it contains a negative number if an error has occurred.

Error codes

-5 - Required argument not specified -6 - $List identifier invalid -8 - Image not found

Usage notes

  • Suppose there is an image with the following description:

    IMAGE SALES ITEM IS STRING LEN 16 ID IS STRING LEN 8 PRICE IS BINARY LEN 4 END IMAGE

    One can associate this image with the $list %LIST with:

    %RC = $ListImg(%LIST, 'SALES')

    or

    %RC = $ListImg(%LIST, %SALES:ID)

    While the latter is syntactically inefficient (:ID is superfluous), it is more efficient because the image name hashing and lookup is done at compile time rather than evaluation time.

  • Functions that can use the association between an image and a $list are:
  • The association between an image and a $list is an association between the image and the particular $list identifier value. A $ListMove does not change the image association of the target $list, and the image association of a $list is not saved or restored with $ListSav and $ListRst.

Products authorizing $ListImg