// Works around ScrollIntoView() not implemented for all platforms
private static void ScrollBy(ListViewBase listViewBase, double scrollBy)
{
var sv = listViewBase.FindFirstChild <ScrollViewer>();
Assert.IsNotNull(sv);
sv.ChangeView(null, scrollBy, null);
}
private static async Task ScrollByInIncrements(ListViewBase listViewBase, double scrollBy)
{
var sv = listViewBase.FindFirstChild <ScrollViewer>();
Assert.IsNotNull(sv);
var current = sv.VerticalOffset;
if (current == scrollBy)
{
return;
}
var increment = sv.ActualHeight / 2;
if (increment == 0)
{
Assert.Fail("ScrollViewer must have non-zero height");
}
if (scrollBy > current)
{
for (double d = current + increment; d < scrollBy; d += increment)
{
sv.ChangeView(null, d, null);
await Task.Delay(10);
}
}
else
{
for (double d = current - increment; d > scrollBy; d -= increment)
{
sv.ChangeView(null, d, null);
await Task.Delay(10);
}
}
sv.ChangeView(null, scrollBy, null);
}
