Bug 44044

Summary: TabbedPage stealing gestures
Product: Forms Reporter: Zhen Liu <liuzhen>
Component: AndroidAssignee: Bugzilla <bugzilla>
Status: RESOLVED FIXED    
Severity: normal CC: jas, sahou
Priority: Normal    
Version: 2.3.0   
Target Milestone: ---   
Hardware: Macintosh   
OS: Mac OS   
Tags: ac Is this bug a regression?: ---
Last known good build:
Attachments: Sample project

Description Zhen Liu 2016-09-07 02:50:36 UTC
I have a custom writing pad control on one tabbed page and it works fine with iOS. 

But on Android, finger movements started horizontally will be captured by the TabbedPage. Only finger movements started with vertical movements can be captured and processed by my writing pad.
Comment 1 Samantha Houts [MSFT] 2016-09-07 18:43:56 UTC
Thank you for taking the time to submit the bug. We tried to reproduce the issue you reported but were unable given the description. If you could please attach a reproduction to the bug by starting with a clean Xamarin.Forms project and adding just the code necessary to demonstrate the issue, we would very much appreciate it.  

For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d  

Warm regards, 
Xamarin Forms Team
Comment 2 Zhen Liu 2016-09-08 03:12:03 UTC
Created attachment 17371 [details]
Sample project

I just put a drawing pad on the Tabbedpage, and if you swipe vertically, the drawing pad catches the gesture and draws the line, if you swipe horizontally, Tabbedpage will start changing tabs.
Comment 3 Samantha Houts [MSFT] 2016-09-08 17:53:24 UTC
Thank you!
Comment 4 Samantha Houts [MSFT] 2016-10-20 20:05:23 UTC
Should be fixed in 2.3.4-pre1. Please note that you will need to opt in to this fix using the Platform Specific Feature documented here:

https://github.com/xamarin/Xamarin.Forms/pull/409

Thank you!