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Description
Tested with 3.0.0-beta.22. I have a basic flutter create app, where I modified the Column in the default lib/main.dart to be:
// [snip]
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
spacing: 32,
children: <Widget>[
Container(
margin: const EdgeInsets.all(16),
decoration: BoxDecoration(border: Border.all()),
child: DropdownButton2(isExpanded: true, items: []),
),
Container(
margin: const EdgeInsets.all(16),
decoration: BoxDecoration(border: Border.all()),
child: DropdownButton2(
isExpanded: true,
items: [DropdownItem(child: const Text('item!'))],
),
),
],
),
),Essentially, I have two DropdownButton2 widgets, one which is empty and the other with a single item, both with an outline (for visualization purposes). The top one is far too short:
In isolation this makes sense, but it's a bit weird: in my case, it's because the box is empty while loading, so I would get a visual of the smaller box before it expanded to the full size. This can be easily worked around via:
buttonStyleData: ButtonStyleData(
height: kMinInteractiveDimension,which makes sense because kMinInteractiveDimension is the default height of a DropdownItem.
...but, if that's already the default height of the items, shouldn't an empty menu also default to the same height? That way the out-of-the-box behavior is a bit closer to what you might expect.