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  1. Qt
  2. QTBUG-7232

Smooth scrolling (scroll per pixel) in ItemViews does not work as expected

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 4.6.0, 5.2.1, 5.5.0
    • Fix Version/s: 5.7.0 Alpha
    • Component/s: Widgets: Itemviews
    • Labels:
      None
    • Environment:
      Linux, KDE but also Qt-only - see testcase
    • Commits:
      934f06220391eb0e0ebf66a2eb037f48adb4c43c 410aa20f073b5e45e73366773b7d173f840a9cfe

      Description

      Scrolling in listviews when set to scroll per pixel will scroll either 3 items at a time, or with large items the heigth of the visible part of the listview.

      Docs say: QAbstractItemView::ScrollPerPixel - The view will scroll the contents one pixel at a time.

      This is especially visible and annoying in KDE when using delegates with big height, as described here:
      https://bugs.kde.org/show_bug.cgi?id=188757
      (for example KDE's wallpaper list with previews, get hot new stuff dialog)

      Attached is a simple qt-only testcase to make the problem visible.

      I created a workaround as a starting point to find the right fix.
      http://qt.gitorious.org/~frederik/qt/frederiks-qt/commit/4a10fde34c478a512acae113fa7e4d083e36ec16

      Cheers
      Frederik

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              Assignee:
              tmartsum Thorbjørn Lund Martsum
              Reporter:
              frederik Frederik Gladhorn
              Votes:
              8 Vote for this issue
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              14 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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