RTL: scrolling janky/not working on OSX trackpad

[PaulL1]

Not clear if it's a Mac specific issue, or more general. The scrolling with a trackpad on the RTL tutorial is reversed from all other grids.

[c0bra]

There's a normalizeScrollLeft() method in gridUtil. @PaulL1 since you have a Mac handy could you please paste the returned values for that tutorial when the tutorial is at the left, right, and middle horizontal scroll positions, as well as manually pulling the scrollLeft property from .ui-grid-viewport? Thanks! You get all the Mac fun :)

[PaulL1]

OK:

• when scrolled to the far right it returns 0, the viewport shows 2500
• when in about the middle it returns 1061, the viewport shows 1439
• when scrolled to the far left it returns 2500, the viewport shows 0

In each case it correctly identifies that we're Chrome and RTL.

[c0bra]

These are the same values I get in Chrome on Windows.

@PaulL1 It's trackpad-only, right? Would it be possible to get a gist of a mousewheel event by setting an Event Listener Breakpoint in the debugger? Let me know which direction the event is from (i.e. swiping my fingers left) and I can compare it with an event from a different OS.

[PaulL1]

Looking for old things to close. This one I appear to have misplaced, so doing it now.

I'm on OSX Yosemite 10.10.1, and Chrome 39.0.2171.95 (64-bit). I have my trackpad set the normal Mac way - which means it drags sort of like an iPad. When I move my fingers right to left on the trackpad, the screen scrolls to the right (i.e. the semantics are that you are dragging the viewport with your fingers). I think this is reversed from the standard Windows setup, so that will make describing this harder.

Firstly, the behaviour I get on http://ui-grid.info/docs/#/tutorial/191_horizontal_scrolling:

1. I scroll to the right (move my fingers from right to left on the trackpad).
2. With a breakpoint in normalizeWheelEvent, the event is a wheelEvent
3. DeltaX: 1, DeltaY: -0, OffsetX: 51, OffsetY: 5, WheelDelta: -3, WheelDeltaX: -3

Secondly, same thing on http://ui-grid.info/docs/#/tutorial/191_horizontal_scrolling

1. I move my fingers from right to left on the trackpad, I'd expect to similarly see the grid scroll right (the viewport move from right to left)
2. in normalizeWheelEvent, the event is a wheelEvent (FYI, Chrome misbehaving, it isn't hitting the breakpoint in normalizeWheelEvent, but lets me step into it. Weird, but I've seen behaviour like that before so ignoring it)
3. DeltaX: 1, DeltaY: -0, OffsetX: 160, OffsetY: 9, WheelDelta: -3, WheelDeltaX: -3

However, the grid seems to scroll left - which I think is probably because of something in RTL reversing the scroll order.

[PaulL1]

Process for getting a wheelEvent (documented in case I need to do it again).

  delete event.originalEvent.path; delete event.originalEvent.currentTarget; delete event.originalEvent.target; delete event.originalEvent.srcElement; delete event.originalEvent.toElement; delete event.preventDefault; delete event.originalEvent.isDefaultPrevented; delete event.originalEvent.view;
  JSON.stringify(event);

Then copy and paste the result into http://json.parser.online.fr/.
Then copy and paste the formatted version into https://gist.github.com/
Then post.

[PaulL1]

I think this is fixed - at least it is on the tutorial site. However, leaving open for a wee while as I know that @swalters changes to scrolling may impact it.

[PaulL1]

This is busted for me as of today. Setting back to a defect.

[c0bra]

Moving to 3.1 as this has been such an unsolvable problem that we don't want it to block a 3.0 release.