Only expand as much as needed to reveal the back layer about backdrop HOT 9 CLOSED

This is implemented by the property stickyFrontLayer which defaults to false. You can set it to true and it will adapt to the back layer's height.

BackdropScaffold(
    appBar: BackdropAppBar(
        title: Text("Backdrop Example"),
        actions: <Widget>[
        BackdropToggleButton(
            icon: AnimatedIcons.list_view,
        )
        ],
    ),
    backLayer: Container(
        height: 200.0,
        child: Center(child: Text("Back Layer")),
    ),
    frontLayer: Center(
        child: Text("Front Layer"),
    ),
    stickyFrontLayer: true,
)

from backdrop.

@heath3n This only works if the height of the back layer widget is bounded. If you are using ListView or something similar set shrinkWrap to true

from backdrop.

@daadu using a ListView and shrinkWrap did not work for me. What else can I do?

from backdrop.

@PembaTamang Please provide us with minimum code that can reproduce the issue. We will look into it.

from backdrop.

class BackLayer extends StatefulWidget {
  @override
  _BackLayerState createState() => _BackLayerState();
}

class _BackLayerState extends State<BackLayer> {
  @override
  Widget build(BuildContext context) {
    return  ListView(
        shrinkWrap: true,
        children:  <Widget>[
ListTile(title:Text("hey")),
ListTile(title:Text("hey")),
ListTile(title:Text("hey")),
ListTile(title:Text("hey")),
         
        ],
 
    );
  }
}

use this as Your Backlayer
and dont give header height

from backdrop.

I could not reproduce the problem. For me it works fine using your BackLayer and stickyFrontLayer: true.
Maybe take a look at

Which flutter channel are you using and do you use the newest version of it?

from backdrop.

@amanv8060 Just to confirm, did you set stickyFrontLayer to true for BackdropScaffold?

from backdrop.

@amanv8060 Just to confirm, did you set stickyFrontLayer to true for BackdropScaffold?

this was causing issue . Close this , if the issue author has no problem

from backdrop.

i want to show some part of the backlayer while opening frontlayer is this possible?

from backdrop.