Flutter Stack size to sibling

Question

Is there a way to size a stack child automatically to its largest sibling? I.e. if I have a Stack with a ListTile and a Container on top, how do I make sure the Container covers the entire ListTile?

Example:

new Stack(children: <Widget>[       new ListTile(           leading: new AssetImage('foo.jpg'),           title: new Text('Bar'),           subtitle: new Text('yipeee'),           isThreeLine: true,       ),       new Container(color: Colors.grey, child: new Text('foo'))  ], ) 

I tried to make it work with Row, Column and Expanded but am running into problems with unbounded constraints.

Is there a way to size the Container (or any other widget such as a GestureDetector) to its largest sibling in the stack?

Answer 1

I had the same issue and finally managed to solve it using this answer:

Inside your Stack, you should wrap your background widget in a Positioned.fill.

return new Stack(   children: <Widget>[     new Positioned.fill(       child: background,     ),     foreground,   ], ); 

-- Mary, https://stackoverflow.com/a/45745479

Applying that to your question results in the following:

Stack(   children: <Widget>[     ListTile(       leading: AssetImage('foo.jpg'),       title: Text('Bar'),       subtitle: Text('yipeee'),       isThreeLine: true,     ),     Positioned.fill(       child: Container(color: Colors.grey, child: Text('foo')),     ),   ], ),