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c#.netxamlwinrt-xamlwindows-store

Windows Store ListView scroll thumb hides in touch mode

Windows Store (Windows 8.1) ListView scroll thumb hides in touch mode. It moves past screen area. This bug is reproducible on large amount of items in the list view.

enter image description here

    <Grid >
      <ListView x:Name="ListView"/>
    </Grid>

    private void OnLoaded(object sender, RoutedEventArgs routedEventArgs)
    {
        List<int> data = new List<int>();


        for(int i = 0; i < 1000; i++)
        {
            data.Add(i);
        }

        this.ListView.ItemsSource = data;
    }
Solution

  • I could reproduce the bug and it has nothing to do with the ListView.

    It's related to the ScrollBar implementation. The position of the "VerticalPanningRoot" (which is the name of the relevant element in the template of the ScrollBar) seems to be miscalculated.

    I did not have available a touch device to test with, so I can't be sure it's not a simulator only bug. I will test with a device and get back after I do. Otherwise it's a bug in the ScrollBar.