MergeableMaterial: Fix adding a slice and separating it #128804
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| _insertChild(j, newChild); | ||
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| if (newChild is MaterialGap) { | ||
| _animationTuples[newChild.key]!.controller.forward(); |
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In _insertChild method, there is a check if (child is MaterialGap) {. So should we just add this line in that check and revert the code change here in this while loop?
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It is not always AnimationController.forward() that is used when _inserChild is called for a MaterialGap. There are cases within didUpdateWidget where it is AnimationController.reverse() or the animation is not being touched at all like in these places:
The handling of a gap's animation is decided for each gap insertion case.
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Ah I see. Thanks for the explanation!
from existing slice
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flutter/flutter@35085c3...bc49cd1 2023-07-06 ian@hixie.ch Allow long-press gestures to continue even if buttons change. (flutter/flutter#127877) 2023-07-06 goderbauer@google.com Enable unreachable_from_main lint - it is stable now!!1 (flutter/flutter#129854) 2023-07-06 ian@hixie.ch Update labeler to new label names (flutter/flutter#130040) 2023-07-05 47639380+Snonky@users.noreply.github.com MergeableMaterial: Fix adding a slice and separating it (flutter/flutter#128804) 2023-07-05 ian@hixie.ch Update infrastructure issue template for new priority scheme (flutter/flutter#129741) 2023-07-05 737941+loic-sharma@users.noreply.github.com Fix typo in canvas example (flutter/flutter#129879) 2023-07-05 hans.muller@gmail.com Reland Fix AnimatedList & AnimatedGrid doesn't apply MediaQuery padding #129556 (flutter/flutter#129860) 2023-07-05 ian@hixie.ch Change from "created via performance template" to "from: performance template" (flutter/flutter#130035) 2023-07-05 109253501+pdblasi-google@users.noreply.github.com Removes deprecated APIs from v2.6 in `binding.dart` and `widget_tester.dart` (flutter/flutter#129663) 2023-07-05 helinx@google.com Add new hot reload case string (flutter/flutter#130008) 2023-07-05 engine-flutter-autoroll@skia.org Manual roll Flutter Engine from 987b621eac4e to bd2e42b203e1 (32 revisions) (flutter/flutter#130023) 2023-07-05 69246223+moylanm@users.noreply.github.com Add simple unit tests for annotations.dart file (flutter/flutter#128902) 2023-07-05 gipcjs@gmail.com fix a bug when android uses CupertinoPageTransitionsBuilder... (flutter/flutter#114303) 2023-07-05 piotr.fleury@gmail.com Add .env file support for option `--dart-define-from-file` (flutter/flutter#128668) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-packages Please CC bmparr@google.com,rmistry@google.com,stuartmorgan@google.com on the revert to ensure that a human is aware of the problem. To file a bug in Packages: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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Fixes #128646
It is possible to add a
MaterialGapto aMergeableMaterialwithout itsAnimationControllerfor the separation animation being kicked off.This leads to the gap instantly being removed again by
_removeEmptyGaps()during the next build.The fix adds an
AnimationController.forward()call where theMaterialGapinsertion happens.I found this bug while using
ExpansionPanelListas the issue describes. Here is a video of anExpansionPanelListbefore and after the fix. Note the gaps between the panels:Before
2023-06-11.03-12-09.mp4
After
2023-06-13.18-29-52.mp4
Pre-launch Checklist
///).If you need help, consider asking for advice on the #hackers-new channel on Discord.