mapbox / mapbox/mapbox-maps-flutter

SymbolPlacement.LINE_CENTER in SymbolLayer : value must be a valid enumeration value

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Dominant language
Dart
Stars
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Forks
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Description

When I generate a new SymbolLayer with a SymbolPlacement that has SymbolPlacement.LINE_CENTER as its value, I get the following error:

error while loading slopes PlatformException(Throwable, java.lang.Throwable: value must be a valid enumeration value, Cause: null, Stacktrace: java.lang.Throwable: value must be a valid enumeration value
    	at com.mapbox.maps.mapbox_maps.StyleController.addStyleLayer$lambda-8(StyleController.kt:91)
    	at com.mapbox.maps.mapbox_maps.StyleController.$r8$lambda$DWIml6qF1nsOCXcfyyItwp6myFM(Unknown Source:0)
    	at com.mapbox.maps.mapbox_maps.StyleController$$ExternalSyntheticLambda42.onStyleLoaded(Unknown Source:6)
    	at com.mapbox.maps.MapboxMap.getStyle(MapboxMap.kt:359)
    	at com.mapbox.maps.mapbox_maps.StyleController.addStyleLayer(StyleController.kt:80)
    	at com.mapbox.maps.pigeons.FLTMapInterfaces$StyleManager$-CC.lambda$setup$7(FLTMapInterfaces.java:6919)
    	at com.mapbox.maps.pigeons.FLTMapInterfaces$StyleManager$$ExternalSyntheticLambda34.onMessage(Unknown Source:2)
    	at io.flutter.plugin.common.BasicMessageChannel$IncomingMessageHandler.onMessage(BasicMessageChannel.java:219)

No error is generated with SymbolPlacement.POINT or SymbolPlacement.LINE. I'm on android 11 with:

Flutter 3.13.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision e1e47221e8 (2 weeks ago) • 2023-08-22 21:43:18 -0700
Engine • revision b20183e040
Tools • Dart 3.1.0 • DevTools 2.25.0

Code type :

 await controller.style.addLayerAt(
          SymbolLayer(
            id: 'direction',
            sourceId: path,
            textField: 'name',
            symbolPlacement: SymbolPlacement.LINE_CENTER,
            ...

Edit : symbolZOrder not working also

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the SymbolLayer example with SymbolPlacement.LINE_CENTER, then inspect StyleController.kt around line 91 and the Android style-layer enum handling shown in the stack trace. Check the related symbolZOrder behavior as well; done means LINE_CENTER and the reported symbolZOrder case are accepted without the enumeration error.

Written by the indexing model from the issue text.

Assessment

Tech stack
dart, flutter
Domain
mobile
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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