Element Tree, Render Tree, and Framework codes show how RenderObject is attached to the render tree.
Test code
Implements of SingleChild-, MultiChild-, and Leaf-RenderObjectElement
SingleChildRenderObjectElement.insertRenderObjectChild
MultiChildRenderObjectElement.insertRenderObjectChild
Both Element objects calls Element.mount, and then does different jobs.
ComponentElement.mount
RenderObjectElement.mount
ComplementElement.performRebuild method calls the build method of StatelessElement or StatefulElement.
StatelessElement.build()
StatefulElement.build()
Flutter Version 1.12.13+hotfix.8
Example: https://github.com/flutter/flutter/tree/master/examples/hello_world
RenderObjectToWidgetElement & RenderObjectToWidgetAdapter
Element & Widget Tree
The setState() invokes the ‘fn’ callback and adds the element to list of dirty elements.
1. Call ‘fn’ callback.
(The ‘result’ is only for checking if the return of ‘fn’ callback is the Future)
2. Set the Element to dirty status.
3. Add the Element to BuildOwner’s _dirtyElements list.
4. Set the Element’s _inDirtyList to ‘true’.
