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  1. Qt
  2. QTBUG-65943

QQuickItemPrivate::nextPrevItemInTabFocusChain not terminating

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Details

    • Bug
    • Resolution: Unresolved
    • P3: Somewhat important
    • None
    • 5.10.0
    • Quick: Core Declarative QML
    • None
    • [^focusbug.cpp]

    Description

      My application gets stuck in QQuickItemPrivate::nextPrevItemInTabFocusChain in certain situations, when trying to navigate along the tab focus chain. Looks like there is an non terminating pingpong between the root item and its last child.

      There might be a similar effect, when inverting the child items and navigating forwards - but I didn't check that.

      I noticed the problem with Qt 5.6 and 5.10, but I would expect to find it in all Qt5 versions.

      Attached is a minimal code snippet, that sets up such a situation. Using the debugger you can easily see what is going on.

      On my system ( X11 ) the behavior is Qt::TabFocusAllControls.

      Attachments

        1. focusbug.cpp
          0.8 kB
          Uwe Rathmann

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-87190 Application freezes when there is no control to focus next

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Activity

            People

              qt.team.quick.subscriptions Qt Quick and Widgets Team
              uwe Uwe Rathmann
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              Dates

                Created:
                Updated: