Closed Bug 898650 Opened 6 years ago Closed 6 years ago
Slide direction is perpendicular to the container's scroll orientation
According to the Windows styleguide, the cross-slide gesture should be on the opposite axis to the scroll axis. So, grids in horizontally oriented containers (i.e. you would pan or scroll side-side) should swipe up/down to select tiles. For a vertically oriented container, you should swipe side-side to select tiles. Currently, the tiles in snapped-view still cross-slide on the y-axis, so either the getScrollAxisFromElement implementation in CrossSlide.jsm is buggy, or there's an unexpected horizonal-oriented container in there producing the unexpected result.
Blocks 8.1 support - the start UI and grids are not really scrollable or easily selectable because of scroll-axis errors.
CrossSlide's getScrollDirection was trying to be accommodating of the possibility of an element being inside a scrollable div or something that might disagree with the document's own scroll direction. That's kind of an anti-pattern as far as Metro is concerned I think. Furthermore, the overflow CSS property checks weren't returning the right result in snapped view. I /think/ this new logic gets us the result we want - wide documents scroll left-right, tall documents top-bottom. We could also check scrollMaxX/Y. Or maybe there's a better method I'm missing? It seems like we must know the scroll direction already in order to handle panning, but I didn't spot it yet if so. We only currently use CrossSlide in the start UI, but if its cheap/easy it would be good to keep it reusable elsewhere.
Assignee: nobody → sfoster
Attachment #796380 - Flags: feedback?(mbrubeck)
Comment on attachment 796380 [details] [diff] [review] Use document aspect ratio check to determine scroll direction Review of attachment 796380 [details] [diff] [review]: ----------------------------------------------------------------- Looks good to me.
Added an early return when we have non-zero scrollMaxX or scrollMaxY. Tests out well for me using snapped, full, landscape and portrait, and should work for split view
Attachment #799131 - Flags: review?(mbrubeck) → review+
Status: NEW → RESOLVED
Closed: 6 years ago
Resolution: --- → FIXED
Target Milestone: --- → Firefox 26
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