Using callbacks to show totals
| CITY | PROJECT | HOURS | TASK |
|---|---|---|---|
| Roma | Army | 221.0 | justo nonumy duo et |
| 301.0 | justo amet diam labore | ||
| 394.0 | diam consetetur Lorem aliquyam | ||
| Roma subtotal | 916.0 | ||
| Carthago | Army | 625.0 | eirmod dolore dolor ut |
| Carthago subtotal | 625.0 | ||
| Olympia | Army | 685.0 | eirmod magna rebum nonumy |
| Olympia subtotal | 685.0 | ||
| Neapolis | Army | 763.0 | et labore erat sanctus |
| 896.0 | magna diam consetetur tempor | ||
| Neapolis subtotal | 1659.0 | ||
| Carthago | Gladiators | 70.0 | et ut gubergren elitr |
| Carthago subtotal | 70.0 | ||
| Neapolis | Gladiators | 292.0 | diam clita sadipscing et |
| 837.0 | sed duo accusam est | ||
| Neapolis subtotal | 1129.0 | ||
| Total | 5084.0 |
The decorator API provides more then just the ability to reformat data before it is put into columns, it also provides a hook that allows you perform some action on the table after each row is processed. This allows you to interject some code that allows you to figure out where you are in the list of data, and then insert an additional row with totals, etc... Typically you would use this functionality along with grouping features to spit out some nice web based reports.
See the TableDecorator.finishRow() API documentation, along with the example decorator that is used in this example page.