fix: SelectableRegion should only finalize selection after changing#159698
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…ever changed the selection, for example a single tap + drag on mobile platforms does not change the selection and should not dispatch a finalized notification
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| void _finalizeSelectableRegionStatus() { | ||
| if (_selectionStatusNotifier.value != SelectableRegionSelectionStatus.changing) { | ||
| // Don't finalize the selection again if it is not currently changing. | ||
| return; | ||
| } | ||
| _selectionStatusNotifier.value = SelectableRegionSelectionStatus.finalized; | ||
| } |
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There is still a risk that someone will edit this class in the future and directly set the status to finalized without realizing that they should have used this method instead. However, I can't think of a better way to do it right now 🤷
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I take that back, you have that covered with the assert in the setter below, nice!
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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
changingnotification. After this change the selection is no longer finalized unless theSelectableRegionSelectionStatuswas previously in achangingstate.Pre-launch Checklist
///).