Flutter Web App: Twitter feed like layout

Question

I'm new to flutter and I am working on a web app (not a phone app). I'm trying to create a layout similar to Twitter on the computer (not phone). It is even similar to stackoverflow itself. You have three columns:

Column 1: On the left with some basic menu items

Column 2: center and wider with a scrolling feed

Column 3: On the right with features/other helpful items in boxes.

With flutter, I have seen layouts that use the side menu but they are all the way on the left. They don't stick to the middle column.

I've attached an image of the general skeleton. I would love for any kind of help as to where I even begin. I've looked at SafeArea, Container etc. But since this is the base layout, I'm not sure what is the best practice for this and I want it to be a good start. Even if I can be pointed in the right direction, like start with this widget etc. I would appreciate it.

Answer 1

I will encourage to calculate the width and based on it change the viewport like I used to

 Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.deepOrange, // for  screen background
      body: Center(
        child: LayoutBuilder(
          builder: (context, constraints) {
            final maxWidth = constraints.maxWidth;

            return SizedBox(
              width: maxWidth * .8, //max viewPort
              child: Row(
                children: [
                  Container(
                    width: maxWidth * .2, //left part
                    color: Colors.blue,
                    child: Column(
                      crossAxisAlignment:
                          CrossAxisAlignment.start, // for alignment
                      children: [
                        ...List.generate(
                          8,
                          (index) => SizedBox(
                            height: 40,
                            child: Text("menu item $index "),
                          ),
                        )
                      ],
                    ),
                  ),
                  Expanded(
                    child: Container(
                        color: Colors.pinkAccent,
                        child: CustomScrollView(
                          slivers: [
                            SliverList(
                              // prefer builder
                              delegate: SliverChildListDelegate(
                                [
                                  ...List.generate(
                                    44,
                                    (index) => SizedBox(
                                      height: 100,
                                      child: Text("Body Element $index "),
                                    ),
                                  )
                                ],
                              ),
                            )
                          ],
                        )),
                  ),
                  Container(
                    width: maxWidth * .2, //right part features
                    color: Colors.deepPurple,
                    child: Column(
                      children: [
                        ...List.generate(
                          4,
                          (index) => SizedBox(
                            height: 40,
                            child: Text("features item $index "),
                          ),
                        )
                      ],
                    ),
                  ),
                ],
              ),
            );
          },
        ),
      ),
    );
  }