Swipe mode/persistent cols edge case prevents swiping

[peterwilsoncc]

In swipe mode, if the screen is only wide enough to fit persistent columns, there is no way of navigating to the other cells.

In this circumstance, the persistent setting could be ignored to allow navigation. A priority option could be introduced to allow for multiple persistent columns; the highest priority would be hidden last.

Reduced test case: http://jsbin.com/buwoc/1/edit?html,output
Narrow the output window until only the address can be seen, you will not be able to navigate to the other property details.

[zachleat]

This should be working fine now. Note that for this to work correctly in your example, you’ll want to remove the   from all of your table whitespace. We want the rows to flow or things get funky.

[peterwilsoncc]

I've created an alternative solution in the branch https://github.com/peterwilsoncc/tablesaw/tree/issues37v2

In the current solution, the persist setting is respected and can cause an overflow on small screens.

In my alternative solution, the persist setting is ignored in the edge case to prevent overflow from occurring.

There's a quick screen cast to demo it at http://youtu.be/B1vZAukL7c8

My alteration requires looping through header cells a second time, so may have efficiency issues. Changes are:

• fakeBreakpoints - second loop for ignoring persistent cols
• new variable for setting the mode to respect/disrespect the setting
• getNext, advance, canAdvance methods check mode before selecting the appropriate set of headers.

Issues as I see it are:

• efficiency of second loop
• is this solution valid: hiding all columns in financial reports may have legal implications
• usability

P