Pressing Back button cause visible frontLayer

[pishguy]

I'm not sure why this issue happened but when frontLayer isn't visible when i pressing on android back button that cause visible frontLayer

my tested code:

class SplashScreenWidget extends StatefulWidget {
  /// Default constructor for [SplashScreenWidget].
  const SplashScreenWidget({Key? key}) : super(key: key);

  @override
  _SplashScreenWidgetState createState() => _SplashScreenWidgetState();
}

class _SplashScreenWidgetState extends State<SplashScreenWidget> {
  @override
  Widget build(BuildContext context) => MaterialApp(
        title: 'Backdrop Demo',
        home: BackdropScaffold(
          appBar: BackdropAppBar(
            actions: const <Widget>[
              BackdropToggleButton(
                icon: AnimatedIcons.list_view,
              )
            ],
          ),
          backLayer: Center(
            child: Text("Back Layer"),
          ),
          frontLayer: Center(
            child: Text("Front Layer"),
          ),
        ),
      );
}

Tf5D05_r.mp4

[WieFel]

In my opinion this is the expected behavior.
@daadu what do you think?

[pishguy]

@WieFel You may right, how can i prevent this behavior now?

[daadu]

Yes, it is expected behaviour.

The code that does it is at -

backdrop/lib/src/scaffold.dart

Lines 617 to 619 in d21cfaa

	return WillPopScope(
	onWillPop: () => _willPopCallback(context),
	child: Scaffold(

Wrapping another WillPopScope around BackdropScaffold, might not work - because I think flutter will also call the code inside backdrop lib. Although you can give it a try.

As of now, you can fork and remove this widget from the library and use it.

[daadu]

OR

You can file a PR to make this behaviour optional adding option bool concealBacklayerOnBackButton = true to BackdropScafold

[daadu]

@WieFel What do you think of this option?

[WieFel]

@daadu yeah we can add the option

[pishguy]

Yes, it is expected behaviour.

The code that does it is at -

backdrop/lib/src/scaffold.dart

Lines 617 to 619 in d21cfaa

	return WillPopScope(
	onWillPop: () => _willPopCallback(context),
	child: Scaffold(

Wrapping another WillPopScope around BackdropScaffold, might not work - because I think flutter will also call the code inside backdrop lib. Although you can give it a try.

As of now, you can fork and remove this widget from the library and use it.

i checked before it doesn't work correctly

[daadu]

@WieFel filled PR please review

[daadu]

@pishguy Thanks for filling the issue, the concealBacklayerOnBackButton option has been added and published to pub.dev with v0.9.1. Please check, you can disable this behaviour, by setting it false.

Also, check yourself out in the README.md!!

[pishguy]

i solved closing frontLayer when visibility of that is true

pull request: 135