Weather layer alpha slider don't change it immidietely

[nnngrach]

Description

video:

https://github.com/user-attachments/assets/be7a982a-6e9a-422a-9554-5c469b52de0e

Steps to reproduce

1. Configure map -> Weather -> Temperature
2. Turn layer on
3. Change Transparency slider position

Actual result

Weather only blinks, but layer alpha doesn't change at all for tiles on the screen. Only new loaded tiles (after map moving) will have new alpha value.

Expected result

Weather layer alpha changes immediately for tiles on the screen

Your Environment (required)

WARNING Crash-Logs MAY contain information you deem sensitive. Review this CAREFULLY before posting your issue!

OsmAnd Version: Nightly 4.9.0#2939m, released 20204-08-07
Android/iOS version: Android 9
Device model: Samsung Galaxy S10
Crash-Logs: ?

[nnngrach]

This code can fix the problem, but I don't sure if this is a correct way.

[DmitryAlexei]

reproduced on Samsung galaxy note 20 Android 13 OsmAnd~ 4.9.0#2932m, released: 2024-08-07

https://github.com/user-attachments/assets/26355b76-7384-4640-94a1-b679f6e9bb3d

[vshcherb]

Cache needs to be cleared after transparency changed

[DmitryAlexei]

OsmAnd~ 4.9.0#3024m, released: 2024-08-19 Works very slow on my device

https://github.com/user-attachments/assets/65eb9f9d-c195-4bbd-bdd4-9796ddffd363

[dmpr0]

Review

• [x] Slider lag

[dmpr0]

Review

21%?	20%?	Video

• [ ] Slider updates with the lag

[dmpr0]

Review 2

Start value 10%	Set to 100%, reopen	Video

• [ ] Unable to set transparency with confidence it will be the same after reopening

[vshcherb]

Previous https://github.com/osmandapp/OsmAnd/pull/21040 was reverted, no decision was made and new bug introduced

[vshcherb]

• [ ] Slider should apply immediately to settings and to values on UI
• Progress bar should be shown until changes are not applied on UI preview (until all calculations are finished) - cancelled