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[material_ui] Add Material motion springs - #13338
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Explain the motion schemes, spring types, and speeds in the MotionSprings docs, list each spring's stiffness and damping ratio, stop using the number helper, tighten the gen_defaults test, and add a pending changelog.
…emplate Springs matches the other Material token catalogs, such as Durations and Curves, and is part of the Material 3 Expressive motion system, so it is now generated by MotionTemplateM3E into motion_defaults_m3e.g.dart. MotionTemplateM3 and motion_defaults_m3.g.dart are unchanged from main.
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November 3, 2026 01:14
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This pull request introduces Material 3 Expressive spring tokens for standard and expressive motion schemes, generating them via a new MotionTemplateM3E template and exposing them in Springs. It also adds corresponding unit tests. Feedback on the changes points out a missing import of package:flutter/physics.dart in motion.dart, which is required for SpringDescription and will cause a compilation error.
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Sorry for the delay here, looks great!
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…6210) flutter/packages@63881f9...565c657 2026-11-08 [email protected] Roll Flutter from e36b370 to acade0f (1 revision) (flutter/packages#13590) 2026-11-07 [email protected] [material_ui] Fix DropdownMenu losing text cursor when re-enabled (flutter/packages#13179) 2026-11-07 [email protected] Roll Flutter from 09175cd to e36b370 (22 revisions) (flutter/packages#13586) 2026-11-07 [email protected] [material_ui] Add Material motion springs (flutter/packages#13338) 2026-11-06 [email protected] [material_ui] Paint the active RoundedRectSliderTrackShape segment on top in RTL (flutter/packages#13225) 2026-11-06 [email protected] [pigeon] Replace Experimental with Preview (flutter/packages#13579) 2026-11-06 [email protected] [material_ui] Fix minimum width for Material 3 primary tab indicator (flutter/packages#13322) 2026-11-06 [email protected] [material_ui] Dispose drag-end CurvedAnimation in modal bottom sheet (flutter/packages#13167) 2026-11-06 [email protected] [camera_web] Re: Support for camera stream on web (flutter/packages#7950) 2026-11-06 [email protected] Roll Flutter from 3623d2d to 09175cd (61 revisions) (flutter/packages#13578) If this roll has caused a breakage, revert this CL and set the roller to dry run mode using the controls here: https://autoroll.skia.org/r/flutter-packages-flutter-autoroll Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Adds
Springs, a set ofSpringDescriptionconstants created from the Material 3 Expressive motion tokens (md.sys.motion.spring.*).Material spring tokens define a stiffness and a damping ratio, but no mass. Each constant uses a mass of 1.0, so it's the same as
SpringDescription.withDampingRatiowith the token's values. They're generated by a newMotionTemplateM3Eingen_defaults.This PR doesn't change any component.
Fixes flutter/flutter#184932
Pre-Review Checklist
[shared_preferences]///).