Exposing widget tree through serviceManager

[JoseAlba]

Hello!

I have been working on a dart dev tool extension for my application but I am having difficulty getting access to the widget tree of the app that I am running. I tried getting access to it through the serviceManager in DevToolsExtension but I wasn't able to successfully.

I see that in inspector_v2 it is able to get access to the rootTree through the InspectorController. I was wondering if it would be possible to expose this API so that developers could easily navigate through the tree and make dart dev tool extensions.

Currently the only way I can think of doing this is through exposing the root widget through a logger or platform channel that could be used as a median through the app and dart devtool extension.

If this is already implemented I was hoping you could share the code snippet so that I can add it to my package.

[kenzieschmoll]

I am having difficulty getting access to the widget tree of the app that I am running. I tried getting access to it through the serviceManager in DevToolsExtension but I wasn't able to successfully.

What did you try for this? This should be possible by calling the same service extension that DevTools Flutter Inspector calls, getRootWidgetTree.

serviceManager.service.callServiceExtension(
  'ext.flutter.inspector.${WidgetInspectorServiceExtensions.getRootWidgetTree.name}'
  serviceManager.isolateManager.mainIsolate.value.id,
  args: {
    'groupName': 'myExtensionGroup', // *see question about this below
    'isSummaryTree': <'true' or 'false'> // true if you only want widgets created in the user's code
    'withPreviews': <'true' or 'false'> // true if you want text previews for RenderParagraphs
  },
);

• @elliette should groupName actually be optional? The groupName is passed along to InspectorSerializationDelegate here, but in InspectorSerializationDelegate the groupName is optional.

[elliette]

@elliette should groupName actually be optional? The groupName is passed along to InspectorSerializationDelegate here, but in InspectorSerializationDelegate the groupName is optional.

Good point! I think it can be optional. Opened #8199 to track.

[kenzieschmoll]

Closing this since calling the service extension directly will provide the widget tree.