Added has footer option

[myapos]

Hi AllenFang,
thank you for this library. I have made some changes. Bellow you can find a short list of them.
If you want please check these out.

• Added hasFooter attribute
• Useful in reporting total calculations
• Presents footer row, always in bottom of the table while the rest of the data in table is sorted normally
• Added an example in examples folder custom-sort-table-has-footer.js

[AllenFang]

HI @myapos, thanks for your hard work, There're some tiny thing hope you can do :)

1. could you please fetch upstream again? Because master have changed

2. could you please describe what's the hasFooter for sort

[myapos]

Hi @AllenFang. hasFooter option gives the possibility to the user to display total data such as sums always in the last row exactly as a footer row.
The problem was that the last row was sorted among the other rows.You can see this in the example that i added in the corresponding folder (examples/js/sort/custom-sort-table-has-footer.js) I added the last row with the sums after the generation of the data products. So in this case i extract the last element and get all the other elements except the last one in a new subArr array, (see if you want the function sort in TableDataStore.js) After that i apply sorting in the subAr and rejoin the sorted subAr (0, length -1) with the last element. I did the fetch upstream again as you can see. Thank you for reviewing this!

[AllenFang]

ok, I'll review it, thanks your explanation 👍

[anikakalbrun]

Hello @AllenFang. Are you planning to add total calculation feature in footer as above in upcoming release? I found that feature really needed. Please let me know your thoughts. Thank you for great plugin!

[AllenFang]

@anikakalbrun, yes, I will support this but I can't promise when I can done for it, sorry

[Skeetfly]

How is this PR going?

[AllenFang]

As I mentioned on readme, react-bootstrap-table already stop implement any new feature and forward to react-bootstrap-table2 https://github.com/react-bootstrap-table/react-bootstrap-table2/tree/develop

And the table footer will be fully support in react-bootstrap-table2