Matthew Kosarek 923eac37f2

feature: implementation of tooltips in the _TestWindowingOwner and minor bugfixes to the multiple windows example app (#181510) ...

## What's new?
- Implemented `_TestTooltipWindowController` in the `TestWindowingOwner`
- Fixed how child windows of the main window are rendered in the
application
- Introduced `WindowManager.getChildrenOf` to simplify filtering and
rendering of the children of a parent window
- Added a test for the tooltip window
- Added a test for modal dialogs of the main window

## Pre-launch Checklist

- [X] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [X] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [X] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [X] I signed the [CLA].
- [X] I listed at least one issue that this PR fixes in the description
above.
- [X] I updated/added relevant documentation (doc comments with `///`).
- [X] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [X] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [X] All existing and new tests are passing.

2026-02-03 18:56:54 +00:00

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multiple_windows_test.dart

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