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There are some cases where selection behavior varies on a given platform by the pointer device, for example dragging to select changes on mobile platforms depending on whether a mouse or a touch is used. When a mouse is used a user can drag to select normally, when a touch is used the selection does not change on mobile platforms when dragging. Before this change at the end of a touch drag users would still be notified the selection was finalized even though nothing changed and they had not previously received a `changing` notification. After this change the selection is no longer finalized unless the `SelectableRegionSelectionStatus` was previously in a `changing` state. ## 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. --------- Co-authored-by: Renzo Olivares <roliv@google.com>
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