Improve Touch (Part 1 - Timestamps)

[rikner]

Fixes #217

Type of change:

Motivation (current vs expected behavior)

SDL's touch handling makes it impossible to get accurate timestamps on events, which breaks our velocity scrolling and causes other weird behaviour.

Also manually tested on my Android phone 👍

Please check if the PR fulfills these requirements

• [x] Self-review: I am confident this is the simplest and clearest way to achieve the expected behaviour
• [x] There are no dependencies on other PRs or I have linked dependencies through Zenhub
• [x] The commit messages are clean and understandable
• [ ] Tests for the changes have been added (for bug fixes / features)

[ephemer]

@rikner it would be awesome if you could provide an update whether this is still relevant, still builds, and still works as expected. From looking quickly at the code it seems like we should be able to merge this 👍

[rikner]

@ephemer Yeah, I will take care of this very very soon.

[rikner]

@ephemer merged master and tested this on my phone. velocity scrolling now reliably works and I also compared the CPU usage with the master branch, which was exactly the same 👍

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@0ce2db4). Click here to learn what that means. The diff coverage is 45.58%.

@@            Coverage Diff            @@
##             master     #282   +/-   ##
=========================================
  Coverage          ?   51.16%           
=========================================
  Files             ?       87           
  Lines             ?     3223           
  Branches          ?        0           
=========================================
  Hits              ?     1649           
  Misses            ?     1574           
  Partials          ?        0

Impacted Files	Coverage Δ
Sources/UIScreen.swift	9.09% <ø> (ø)
Sources/UIView+animate.swift	78.37% <ø> (ø)
Sources/UIApplicationDelegate.swift	0% <ø> (ø)
Sources/UINavigationBarAndroid.swift	57.14% <ø> (ø)
Sources/AVPlayerItem+Mac.swift	0% <ø> (ø)
Sources/UIWindow.swift	71.05% <ø> (ø)
Sources/UIAlertAction.swift	0% <ø> (ø)
Sources/SDL2-Shims.swift	0% <ø> (ø)
Sources/DisplayLink.swift	0% <0%> (ø)
Sources/UIViewAnimationGroup.swift	63.63% <0%> (ø)
... and 15 more

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Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 0ce2db4...327a804. Read the comment docs.

[rikner]

@janek 💯