Skip to content

Clarify route transition animations - #186552

Merged
auto-submit[bot] merged 1 commit into
flutter:masterfrom
mvincentong:docs-route-transition-animations
May 28, 2026
Merged

auto-submit[bot] merged 1 commit into
flutter:masterfrom
mvincentong:docs-route-transition-animations

Conversation

@mvincentong

Copy link
Copy Markdown
Contributor

Issue: fixes #23206

The PageRouteBuilder and RouteTransitionsBuilder docs pointed readers to ModalRoute.buildTransitions, but the callback docs themselves did not explain the practical difference between the primary animation and secondaryAnimation parameters.

Fix:

Clarify that animation drives the route's own push/pop transition, while secondaryAnimation lets the route coordinate with a route pushed above it. The docs now also mention that secondaryAnimation only runs when the adjacent routes allow transition coordination through canTransitionTo/canTransitionFrom.

Tests:

  • ./bin/dart format --output=none --set-exit-if-changed packages/flutter/lib/src/widgets/routes.dart packages/flutter/lib/src/widgets/pages.dart
  • ./bin/flutter analyze packages/flutter/lib/src/widgets/routes.dart packages/flutter/lib/src/widgets/pages.dart
  • git diff --check

Risk:

Docs-only change in two route API comments. No runtime behavior changes.

@github-actions github-actions Bot added framework flutter/packages/flutter repository. See also f: labels. f: routes Navigator, Router, and related APIs. labels May 15, 2026

@gemini-code-assist gemini-code-assist Bot left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Code Review

This pull request enhances the documentation for PageRouteBuilder and RouteTransitionsBuilder by detailing the roles of the animation and secondaryAnimation parameters in route transitions and coordination. The review feedback recommends using square brackets for parameter references to ensure consistency with Flutter documentation standards and suggests providing more specific details regarding transition coordination methods.

Comment thread packages/flutter/lib/src/widgets/pages.dart Outdated
Comment thread packages/flutter/lib/src/widgets/routes.dart Outdated
@mvincentong
mvincentong force-pushed the docs-route-transition-animations branch from 4548e6c to 6e2f225 Compare May 15, 2026 00:47
@mvincentong
mvincentong changed the base branch from main to master May 21, 2026 03:01
@Piinks
Piinks requested review from Piinks and victorsanni May 26, 2026 22:43

@Piinks Piinks left a comment

Copy link
Copy Markdown
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

LGTM thank you!

@Piinks Piinks added the CICD Run CI/CD label May 27, 2026
@victorsanni victorsanni added the autosubmit Merge PR when tree becomes green via auto submit App label May 28, 2026
@auto-submit auto-submit Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label May 28, 2026
@auto-submit

auto-submit Bot commented May 28, 2026

Copy link
Copy Markdown
Contributor

autosubmit label was removed for flutter/flutter/186552, because The base commit of the PR is older than 7 days and can not be merged. Please merge the latest changes from the main into this branch and resubmit the PR.

@victorsanni
victorsanni force-pushed the docs-route-transition-animations branch from 6e2f225 to 4469c9d Compare May 28, 2026 20:24
@victorsanni victorsanni added CICD Run CI/CD and removed CICD Run CI/CD labels May 28, 2026
@Piinks Piinks added the autosubmit Merge PR when tree becomes green via auto submit App label May 28, 2026
@auto-submit
auto-submit Bot added this pull request to the merge queue May 28, 2026
Merged via the queue into flutter:master with commit 06523e5 May 28, 2026
95 checks passed
@flutter-dashboard flutter-dashboard Bot removed the autosubmit Merge PR when tree becomes green via auto submit App label May 28, 2026
auto-submit Bot pushed a commit to flutter/packages that referenced this pull request May 29, 2026
flutter/flutter@e70534d...b05a9d7

2026-05-29 [email protected] Roll Skia from 47155534833e to d9d6b440c4e7 (1 revision) (flutter/flutter#187301)
2026-05-29 [email protected] Roll Skia from f93ed13d77fb to 47155534833e (4 revisions) (flutter/flutter#187291)
2026-05-29 [email protected] [web_ui] Optimize skwasm text layout and path decoding to eliminate dynamic boxing churn under Wasm (flutter/flutter#186978)
2026-05-29 [email protected] Roll Fuchsia Linux SDK from SBpmmPxqx3lAvGojE... to jMR_VXQi07kAk8vbR... (flutter/flutter#187279)
2026-05-29 [email protected] Remove Material import from sliver tree rendering test (flutter/flutter#187000)
2026-05-29 [email protected] [Impeller] Remove the y_coord_scale Y-flip plumbing (flutter/flutter#187224)
2026-05-29 [email protected] Add/remove overlay child RenderObject from the tree in `attach`/`detach` (flutter/flutter#186564)
2026-05-29 [email protected] Roll Skia from fcfe5975c945 to f93ed13d77fb (4 revisions) (flutter/flutter#187273)
2026-05-28 [email protected] Handle complex RSE rendering in the uber SDF pipeline (flutter/flutter#186434)
2026-05-28 [email protected] Roll Dart SDK from 082191101fcc to 683322426411 (2 revisions) (flutter/flutter#187270)
2026-05-28 [email protected] Clarify route transition animations (flutter/flutter#186552)
2026-05-28 [email protected] document that the default Key is null and explain proper usage in list diffing (flutter/flutter#185197)
2026-05-28 [email protected] [flutter_tools] Use super parameters in missed spots (flutter/flutter#186197)
2026-05-28 [email protected] docs: Document MediaQueryData.alwaysUse24HourFormat on macOS, Windows, Linux, web (#160664) (flutter/flutter#186642)
2026-05-28 [email protected] Roll Skia from 5493e4c144cd to fcfe5975c945 (3 revisions) (flutter/flutter#187256)
2026-05-28 [email protected] Shares opengles golden context (flutter/flutter#187243)
2026-05-28 [email protected] Update the Curl CIPD package in .ci.yaml to version 8.20.0 (flutter/flutter#187133)
2026-05-28 [email protected] Improve SizedBox's docs (flutter/flutter#187208)
2026-05-28 [email protected] [Impeller] Support instanced rendering across all backends (flutter/flutter#186653)
2026-05-28 [email protected] [Android] Reset system UI visibility flags when setting edge-to-edge mode (flutter/flutter#187207)
2026-05-28 [email protected] Roll Skia from a38708fb7926 to 5493e4c144cd (7 revisions) (flutter/flutter#187241)
2026-05-28 [email protected] Turned on impeller by default on macos (flutter/flutter#186546)
2026-05-28 [email protected] Clarify lazy scroll extent docs (flutter/flutter#186864)
2026-05-28 [email protected] [web] Fix WebParagraph locales test (flutter/flutter#186813)
2026-05-28 [email protected] Roll Packages from 4b424d7 to 10cbdc5 (3 revisions) (flutter/flutter#187238)
2026-05-28 [email protected] Roll Dart SDK from f3db7b7d9801 to 082191101fcc (8 revisions) (flutter/flutter#187235)
2026-05-28 [email protected] Roll Skia from 32acea791248 to a38708fb7926 (1 revision) (flutter/flutter#187221)
2026-05-28 [email protected] [Flutter GPU] Add r32Float and remove Apple-only XR pixel formats (flutter/flutter#187069)

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 [email protected],[email protected] 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://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
creatorpiyush pushed a commit to creatorpiyush/packages that referenced this pull request Jun 10, 2026
…r#11803)

flutter/flutter@e70534d...b05a9d7

2026-05-29 [email protected] Roll Skia from 47155534833e to d9d6b440c4e7 (1 revision) (flutter/flutter#187301)
2026-05-29 [email protected] Roll Skia from f93ed13d77fb to 47155534833e (4 revisions) (flutter/flutter#187291)
2026-05-29 [email protected] [web_ui] Optimize skwasm text layout and path decoding to eliminate dynamic boxing churn under Wasm (flutter/flutter#186978)
2026-05-29 [email protected] Roll Fuchsia Linux SDK from SBpmmPxqx3lAvGojE... to jMR_VXQi07kAk8vbR... (flutter/flutter#187279)
2026-05-29 [email protected] Remove Material import from sliver tree rendering test (flutter/flutter#187000)
2026-05-29 [email protected] [Impeller] Remove the y_coord_scale Y-flip plumbing (flutter/flutter#187224)
2026-05-29 [email protected] Add/remove overlay child RenderObject from the tree in `attach`/`detach` (flutter/flutter#186564)
2026-05-29 [email protected] Roll Skia from fcfe5975c945 to f93ed13d77fb (4 revisions) (flutter/flutter#187273)
2026-05-28 [email protected] Handle complex RSE rendering in the uber SDF pipeline (flutter/flutter#186434)
2026-05-28 [email protected] Roll Dart SDK from 082191101fcc to 683322426411 (2 revisions) (flutter/flutter#187270)
2026-05-28 [email protected] Clarify route transition animations (flutter/flutter#186552)
2026-05-28 [email protected] document that the default Key is null and explain proper usage in list diffing (flutter/flutter#185197)
2026-05-28 [email protected] [flutter_tools] Use super parameters in missed spots (flutter/flutter#186197)
2026-05-28 [email protected] docs: Document MediaQueryData.alwaysUse24HourFormat on macOS, Windows, Linux, web (#160664) (flutter/flutter#186642)
2026-05-28 [email protected] Roll Skia from 5493e4c144cd to fcfe5975c945 (3 revisions) (flutter/flutter#187256)
2026-05-28 [email protected] Shares opengles golden context (flutter/flutter#187243)
2026-05-28 [email protected] Update the Curl CIPD package in .ci.yaml to version 8.20.0 (flutter/flutter#187133)
2026-05-28 [email protected] Improve SizedBox's docs (flutter/flutter#187208)
2026-05-28 [email protected] [Impeller] Support instanced rendering across all backends (flutter/flutter#186653)
2026-05-28 [email protected] [Android] Reset system UI visibility flags when setting edge-to-edge mode (flutter/flutter#187207)
2026-05-28 [email protected] Roll Skia from a38708fb7926 to 5493e4c144cd (7 revisions) (flutter/flutter#187241)
2026-05-28 [email protected] Turned on impeller by default on macos (flutter/flutter#186546)
2026-05-28 [email protected] Clarify lazy scroll extent docs (flutter/flutter#186864)
2026-05-28 [email protected] [web] Fix WebParagraph locales test (flutter/flutter#186813)
2026-05-28 [email protected] Roll Packages from 4b424d7 to 10cbdc5 (3 revisions) (flutter/flutter#187238)
2026-05-28 [email protected] Roll Dart SDK from f3db7b7d9801 to 082191101fcc (8 revisions) (flutter/flutter#187235)
2026-05-28 [email protected] Roll Skia from 32acea791248 to a38708fb7926 (1 revision) (flutter/flutter#187221)
2026-05-28 [email protected] [Flutter GPU] Add r32Float and remove Apple-only XR pixel formats (flutter/flutter#187069)

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 [email protected],[email protected] 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://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
via-guy pushed a commit to via-guy/flutter that referenced this pull request Jun 26, 2026
Issue: fixes flutter#23206

The `PageRouteBuilder` and `RouteTransitionsBuilder` docs pointed
readers to `ModalRoute.buildTransitions`, but the callback docs
themselves did not explain the practical difference between the primary
`animation` and `secondaryAnimation` parameters.

Fix:

Clarify that `animation` drives the route's own push/pop transition,
while `secondaryAnimation` lets the route coordinate with a route pushed
above it. The docs now also mention that `secondaryAnimation` only runs
when the adjacent routes allow transition coordination through
`canTransitionTo`/`canTransitionFrom`.

Tests:

- `./bin/dart format --output=none --set-exit-if-changed
packages/flutter/lib/src/widgets/routes.dart
packages/flutter/lib/src/widgets/pages.dart`
- `./bin/flutter analyze packages/flutter/lib/src/widgets/routes.dart
packages/flutter/lib/src/widgets/pages.dart`
- `git diff --check`

Risk:

Docs-only change in two route API comments. No runtime behavior changes.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

CICD Run CI/CD f: routes Navigator, Router, and related APIs. framework flutter/packages/flutter repository. See also f: labels.

Projects

None yet

Development

Successfully merging this pull request may close these issues.

[docs] explain difference between animation and secondaryAnimation in buildTransitions

4 participants