Scrolling triggers swipe to other tab

Describe your problem!

Reported on support mail and video included with permission to publish:

https://files.droescher.eu/public/scroll_issue.mp4

Problem started in first beta and is still valid in production version 2021.08.15 for this user. I cannot reproduce.

How to reproduce?

See video

Actual result after these steps?

No response

Expected result after these steps?

No response

Reproducible

Unclear

c:geo Version

2021.08.15

System information

## System information

c:geo version: 2021.07.17-RC2

Device:
-------
- Device type: SM-G998B (p3sxeea, samsung)
- Available processors: 8
- Android version: 11
- Android build: RP1A.200720.012.G998BXXU3AUF6
- Screen resolution: 1080x2280px (360x760dp)
- Sailfish OS detected: false
- Google Play services: enabled - 21.24.18 (150400-383468479)
- HW acceleration: enabled (default state)

Sensor and location:
-------
- Low power mode: inactive
- Compass capabilities: yes
- Rotation vector sensor: present
- Orientation sensor: present
- Magnetometer & Accelerometer sensor: present
- Direction sensor used: orientation

Program settings:
-------
- Hide caches: -
- Hide waypoints: -
- Set language: de_DE (system default)
- System date format: dd.MM.yy
- Debug mode active: no
- Live map mode: true
- OSM multi-threading: true / threads: 4
- Global filter: display all caches
- Last backup: 13. Mai, 11:14
- Routing mode: Walk
- Settings: v5, Count:136
- Map: Google: Karte
- Id: cgeo.geocaching.maps.google.v2.GoogleMapProvider$GoogleMapSource
- Atts: none
- Theme: none

Services:
-------
- Geocaching sites enabled:
geocaching.com: Logged in (Anmeldung OK) / PREMIUM
Geocaching.com Adventure Lab
- Geocaching.com date format: dd/MM/yyyy
- Routing: external / BRouter installed: false
- Installed c:geo plugins: none

Permissions & paths:
-------
- Fine location permission: granted
- Write external storage permission: granted
- System internal c:geo dir: /data/user/0/cgeo.geocaching (166,0 GB free) v2 internal isDir(8 entries)
- Legacy User storage c:geo dir: /storage/emulated/0/cgeo (166,0 GB free) v2 external non-removable isDir(7 entries)
- Geocache data: /storage/emulated/0/Android/data/cgeo.geocaching/files/GeocacheData (166,0 GB free) v2 external non-removable isDir(1187 entries)
- Internal theme sync (is turned off): /data/user/0/cgeo.geocaching/MapThemeData (166,0 GB free) v2 internal isDir(0 entries)
- Public Folders: #11
- BASE: /cgeo (User-Defined)[/cgeo[DOCUMENT#0:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo, Av:true, files:>=59, dirs:>=8, totalFileSize:>=387,6 MB, free space: 166,0 GB, files on device: 12812797)
- OFFLINE_MAPS: /cgeomaps (User-Defined)[/cgeomaps[DOCUMENT#0:p-content://com.android.externalstorage.documents/tree/primary%3Acgeomaps::]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeomaps/document/primary%3Acgeomaps, Av:true, files:1, dirs:1, totalFileSize:2,3 GB, free space: 166,0 GB, files on device: 12812797)
- OFFLINE_MAP_THEMES: /cgeomaps/_themes (Default)[/cgeomaps/_themes[PERSISTABLE_FOLDER(OFFLINE_MAPS)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeomaps::/_themes]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeomaps/document/primary%3Acgeomaps%2F_themes, Av:true, files:0, dirs:0, totalFileSize:0 B, free space: 166,0 GB, files on device: 12812797)
- LOGFILES: /cgeo/logfiles (Default)[/cgeo/logfiles[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/logfiles]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Flogfiles, Av:true, files:6, dirs:0, totalFileSize:57,5 MB, free space: 166,0 GB, files on device: 12812797)
- GPX: /cgeo/gpx (Default)[/cgeo/gpx[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/gpx]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Fgpx, Av:true, files:51, dirs:0, totalFileSize:205,3 MB, free space: 166,0 GB, files on device: 12812797)
- BACKUP: /cgeo/backup (Default)[/cgeo/backup[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/backup]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Fbackup, Av:true, files:2, dirs:1, totalFileSize:124,9 MB, free space: 166,0 GB, files on device: 12812797)
- FIELD_NOTES: /cgeo/field-notes (Default)[/cgeo/field-notes[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/field-notes]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Ffield-notes, Av:true, files:0, dirs:0, totalFileSize:0 B, free space: 166,0 GB, files on device: 12812797)
- SPOILER_IMAGES: /cgeo/GeocachePhotos (Default)[/cgeo/GeocachePhotos[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/GeocachePhotos]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2FGeocachePhotos, Av:true, files:0, dirs:0, totalFileSize:0 B, free space: 166,0 GB, files on device: 12812797)
- ROUTING_BASE: /cgeo/routing (Default)[/cgeo/routing[PERSISTABLE_FOLDER(BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/routing]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Frouting, Av:true, files:7, dirs:1, totalFileSize:81,2 KB, free space: 166,0 GB, files on device: 12812797)
- ROUTING_TILES: /cgeo/routing/segments4 (Default)[/cgeo/routing/segments4[PERSISTABLE_FOLDER(ROUTING_BASE)#1:p-content://com.android.externalstorage.documents/tree/primary%3Acgeo::/routing/segments4]] (Uri: content://com.android.externalstorage.documents/tree/primary%3Acgeo/document/primary%3Acgeo%2Frouting%2Fsegments4, Av:true, files:0, dirs:0, totalFileSize:0 B, free space: 166,0 GB, files on device: 12812797)
- TEST_FOLDER: [Legacy]/data/user/0/cgeo.geocaching/files/unittest (Default)[/data/user/0/cgeo.geocaching/files/unittest[FILE#1:p-file:///data/user/0/cgeo.geocaching/files::/unittest]] (Uri: file:///data/user/0/cgeo.geocaching/files/unittest, Av:true, files:0, dirs:0, totalFileSize:0 B, free space: 166,0 GB, files on device: -1)
- Map render theme path:
- PersistedDocumentUris: #1
- TRACK: null
- Persisted Uri Permissions: #2
- content://com.android.externalstorage.documents/tree/primary%3Acgeomaps (18. März, 20:51):RW
- content://com.android.externalstorage.documents/tree/primary%3Acgeo (18. März, 20:51):RW
- Database: /data/user/0/cgeo.geocaching/databases/data (v95, Size:131,5 MB) on system internal storage

--- End of system information ---

Additional Information

Support Ticket 165988

[fm-sys]

Problem is, that the user does not scroll vertically enough… Nothing we can solve AFAIK, he needs to change his scrolling habits 😉

[moving-bits]

If someone wants to dive in it: We have a very basic FastScrollListener, stored in geocaching/ui folder.

What puzzles me: The behavior described looks like the listener getting switched off too early, so that the movement gets forwarded to the viewpager instead. Whereas in some other issue we have the notion of fast scroll listener staying active for too long. 😦

On material.io I found no info on fast scrolling behavior, but there are other fast scroll libs availabe, e. g. https://github.com/L4Digital/FastScroll (and many more).