workavia-mail-front/docs/adr/0007-fix-show-dropdown-can-not-over-overlay.md

7. Fix show Dropdown can't not over overlayUI (#685)

Date: 2022-06-29

Status

• Issue: DropDownButton menu shows behind Overlay

Context

• Root cause: Add package flutter_portal to fix this issue

Decision

• When add Dropdown button to overlayUI, it can't lying above overlayUI.

Consequences

• The app Navigator has a list of routes (_history) and each route has its list of OverlayEntry's. When you push a new route using Navigator.push() you are inserting the route overlays above the overlays of the last route. So, when you add an independent Overlay with just Overlay.of(context).insert(myOverlay); it will always be above any route/overlay managed by the app Navigator (if what you receive from the of() method is the Navigator Overlay).