Notice (2018-05-24): bugzilla.xamarin.com is now in
Please join us on
Visual Studio Developer Community and in the
Mono organizations on
GitHub to continue tracking issues. Bugzilla will remain
available for reference in read-only mode. We will continue to work
on open Bugzilla bugs, copy them to the new locations
as needed for follow-up, and add the new items under Related
Our sincere thanks to everyone who has contributed on this bug
tracker over the years. Thanks also for your understanding as we
make these adjustments and improvements for the future.
Please create a new report for Bug 36670 on
Developer Community or GitHub if you have new
information to add and do not yet see a matching new report.
If the latest results still closely match this report, you can use the
In special cases on GitHub you might also want the comments:
GitHub Markdown with public comments
Created attachment 14143 [details]
Source code that demonstrates issue
On WinPhone 8.1 RT, if a ScrollView has descendants that are Labels with LineBreakMode = LineBreakMode.WordWrap, the layout calculations within XF are incorrect. As a result, items near the bottom of the ScrollView may not be visible at all, or may be visible whilst the user is scrolling but move off the display the moment the user removes contact with the display.
The attached source file demonstrates this problem. The last Label has the text "Expect this to be visible", but on WinPhone 8.1 RT, on this text is not visible.
(Possibly related to Bug 31974 which is for Windows platform - perhaps the code is shared between WinPhone and Windows inside XF?)
Created attachment 14564 [details]
Screenshot showing problem
Screenshot showing problem in actual app.
To protect IP, I have blocked out text using red blocks. However, I have shown separate blocks where text is wrapped, so that you can see where word wrap has occurred.
The very bottom red block covers just the top of the text for that row. However, the ScrollView will not permit scrolling to see the bottom of that item. It should. It seems that when text is word wrapped, the calculation of the height of the content of the ScrollView is incorrectly calculated, preventing proper display of the final item(s).
Changing back to New after adding comment and screenshot.
The same problem occurs on UWP using 22.214.171.124 . Let me know if you need a separate bug raised.
Still occurs on both WinRT 8.1 and UWP, using XF 126.96.36.199
Also occurs on Android.
Is there any update on this? It's been over a year and this is still a problem.