Adapt a built-in Report

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Purpose

A question was posted to the Discourse forum wondering if there were tips somewhere for copying an internal Gramps report to a make an experimental add-on?

It seems like more people would be intrigued with the possibilities of tweaking reports without the risk of breaking a feature. Particularly one that they use often enough that tweaking it seemed like a good idea.

Making a duplicate add-on sidesteps putting the original at risk. However, there are differences between built-ins and 3rd party add-ons. It seemed like that might require at least converting the library paths and making a new .gpr.py registration file. What else?

A reply privately shared

In a private message, GaryG privately replied and sent a few copies of reports generated that address the question.

In the sample cases, Gary had taken the Detailed Ancestor and Detailed Descendant stock reports and added the ability to include *all* images for everyone. The Detailed individual report had that functionality, but the ancestor/descendant did not.

ch-ch-ch-changes

The important changes

1. Change the Class names to be unique. Each report has 2 classes - one for the code and one for the report. In my cases, I added a trailing ‘i’.
2. Change the name of the report styles. This is necessary if you are using books, not absolutely required if not. For the Descendant report I changed the style prefix from DDR to DDRI, for instance. I didn’t change the Ancestor report.
3. Update the .gpr.py registration file to point to the correct file and correct classes.

Attaching are 2 samples with the old (names ending with report.py) and the new code (names ending with reporti.py) as well as the revised .gpr.py files. The old code may have changed since I wrote the new code quite a while ago - so every diff may not be important.

See also

• substitution values for Reports
• Report writing tutorial
• Report snippets
• Sample reports

Sample Report Specifications

• Ahnentafel Report
• Count Ancestors
• Geographic Report
• Graphical Descendant Report
• Summary Event List

(Section)

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