Uploaded image for project: 'Sakai'
  1. Sakai
  2. SAK-32366

Collapsing topnav causes screen flashing under certain conditions

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: RESOLVED
    • Priority: Major
    • Resolution: Incorporated
    • Affects Version/s: 12.0
    • Fix Version/s: None
    • Component/s: morpheus, Portal
    • Labels:
      None
    • Environment:
      mysql-trunk nightly, chrome on windows and fedora

      Description

      Under certain circumstances the collapsing top navigation bar will cause the screen to flash very quickly when scrolling. I am unable so far to create a video of this phenomenon, but I have attached two screenshots to attempt to show what is happening.

      I believe this issue appears when the pixel height of the content that is outside the scroll-able area of the page is roughly the same as the reduction in height caused by the collapsing/shrinking of the top bars. When the top bars shrink the height of the page is reduced. If the new total height of the page is smaller than the height of the browser window the scroll bar will disappear, but this also makes the top bars re-inflate. This happens 3-4 rapidly causing bad screen flashing.

        Gliffy Diagrams

          Zeplin

            Attachments

            1. exampleA.png
              exampleA.png
              148 kB
            2. exampleB.png
              exampleB.png
              126 kB
            3. screenflash.mp4
              268 kB

              Issue Links

                Activity

                  People

                  Assignee:
                  Unassigned Unassigned
                  Reporter:
                  johnsomo Mickey Johnson
                  Votes:
                  0 Vote for this issue
                  Watchers:
                  2 Start watching this issue

                    Dates

                    Created:
                    Updated:
                    Resolved:

                      Git Integration