ScaffoldMessenger #64101
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ScaffoldMessenger #64101
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It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat. Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing. |
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I've updated this based on your feedback @HansMuller thank you! PTAL. :) |
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| void _unregister(ScaffoldState scaffold) { | ||
| _scaffolds.remove(scaffold); |
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Should we assert(_scaffolds.remove(scaffold)) here?
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This reverts commit 48f1a0a.
This was referenced Oct 15, 2020
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Description
Framework Migration: #64170
Migration Guide: flutter/website#4527
This introduces the
ScaffoldMessenger, a new widget for handlingSnackBars.The
ScaffoldStatemethods of [showSnackBar,hideCurrentSnackBar, andremoveCurrentSnackBar] will call on theScaffoldMessengerif used. This prevents users from being broken by the change and allows them time to migrate their code.By using the
ScaffoldMessenger,SnackBars can persist across multipleScaffolds and transitions. This change also adds aHerotoSnackBars so that they transition smoothly.Hero flight between Scaffolds:
Asynchronous SnackBars:
Follow-up work:
Related Issues
Fixes #62921
Tests
All existing
SnackBartests have been migrated and passed. Added a few more for new persistence across routes.Checklist
Before you create this PR, confirm that it meets all requirements listed below by checking the relevant checkboxes (
[x]). This will ensure a smooth and quick review process.///).flutter analyze --flutter-repo) does not report any problems on my PR.Breaking Change
Did any tests fail when you ran them? Please read Handling breaking changes.
Kind of, all calls to `Scaffold.of(context).showSnackBar/removeCurrentSnackBar/hideCurrentSnackBar are deprecated, but still work since they now call on the ScaffoldMessenger. This should not explicitly break anyone. Treating it as breaking anyways.