[Emilda-devel] code39 checksum

[David E. <dav...@ad...>]

Here is a patch for emilda-1.2.2 that allows for a code39 checksummed
barcode to be generated, according to the wishes of the emilda
administrator.

It adds the following changes:

   * No longer generate the text as part of the barcode image (to avoid
     confusing the user with the checksum character as part of the text
     of the barcode gif image).  The barcode text without the checksum
     character) is already printed on the same page / table row anyway.
   * The barcode cache is handled automatically, since the image with
     the checksum is saved with the checksum character as part of the
     file name.  However, existing (non-checksummed) images will still
     have the barcode text as part of the image.  Although this is not
     fully consistent, I believe it is harmless.
   * In the event that lowercase characters were sent, they are
     converted to uppercase.

In addition to this patch, it is necessary to have a new row inserted
into the configuration table.  See the attached .sql for this insert.

I can understand if it is not desired to add this patch to the stable
1.2 branch.  However, it can illustrate a possible path to add this
functionality to the cvs trunk.

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