The following code results in an error: Incorrect use of ParentDataWidget. The cause for this error is the Positioned widget, but I'm not sure why...
return Scaffold(
body: Container(
color: Colors.red,
child: Positioned(
left: 32.0,
child: Container(
width: 128.0,
height: 128.0,
color: Colors.yellow,
),
),
),
);
Positioned has to be in a Stack according to the documentation that says
A widget that controls where a child of a Stack is positioned.
A Positioned widget must be a descendant of a Stack, and the path from the Positioned widget to its enclosing Stack must contain only StatelessWidgets or StatefulWidgets (not other kinds of widgets, like RenderObjectWidgets).
return Scaffold(
body: Container(
color: Colors.red,
child: Stack(
children: <Widget>[
Positioned(
left: 32.0,
child: Container(
width: 128.0,
height: 128.0,
color: Colors.yellow,
),
),
],
),
),
);