Recently i am trying to run the project but seem the snackbar is have some kind of error like this
the compiler show the error below the "context" message
how to solve it?
void showSnackBarSuccess(BuildContext context, String text) {
showTopSnackBar(
context,
CustomSnackBar.success(
message: text,
),
);
}
void showSnackBarInfo(BuildContext context, String text) {
showTopSnackBar(
context,
CustomSnackBar.info(
message: text,
),
);
}
void showSnackBarError(BuildContext context, String text) {
showTopSnackBar(
context,
CustomSnackBar.error(
message: text,
),
);
}
Here the error of the compile
Launching lib\main.dart on Edge in debug mode...
lib\main.dart:1
: Error: The argument type 'BuildContext' can't be assigned to the parameter type 'OverlayState'.
lib/…/snackar/show_snackbar.dart:16
- 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('/C:/src/flutter_windows_3.0.4-stable/flutter/packages/flutter/lib/src/widgets/framework.dart').
package:flutter/…/widgets/framework.dart:1
- 'OverlayState' is from 'package:flutter/src/widgets/overlay.dart' ('/C:/src/flutter_windows_3.0.4-stable/flutter/packages/flutter/lib/src/widgets/overlay.dart').
package:flutter/…/widgets/overlay.dart:1
context,
^
: Error: The argument type 'BuildContext' can't be assigned to the parameter type 'OverlayState'.
lib/…/snackar/show_snackbar.dart:25
Here the full of source code of TopSnackBar
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:top_snackbar_flutter/safe_area_values.dart';
import 'package:top_snackbar_flutter/tap_bounce_container.dart';
typedef ControllerCallback = void Function(AnimationController);
enum DismissType { onTap, onSwipe, none }
OverlayEntry? _previousEntry;
/// The [overlayState] argument is used to add specific overlay state.
/// If you are sure that there is a overlay state in your [BuildContext],
/// You can get it [Overlay.of(BuildContext)]
/// Displays a widget that will be passed to [child] parameter above the current
/// contents of the app, with transition animation
///
/// The [child] argument is used to pass widget that you want to show
///
/// The [animationDuration] argument is used to specify duration of
/// enter transition
///
/// The [reverseAnimationDuration] argument is used to specify duration of
/// exit transition
///
/// The [displayDuration] argument is used to specify duration displaying
///
/// The [onTap] callback of [_TopSnackBar]
///
/// The [persistent] argument is used to make snack bar persistent, so
/// [displayDuration] will be ignored. Default is false.
///
/// The [onAnimationControllerInit] callback is called on internal
/// [AnimationController] has been initialized.
///
/// The [padding] argument is used to specify amount of outer padding
///
/// [curve] and [reverseCurve] arguments are used to specify curves
/// for in and out animations respectively
///
/// The [safeAreaValues] argument is used to specify the arguments of the
/// [SafeArea] widget that wrap the snackbar.
///
/// The [dismissType] argument specify which action to trigger to
/// dismiss the snackbar. Defaults to `TopSnackBarDismissType.onTap`
///
/// The [dismissDirection] argument specify in which direction the snackbar
/// can be dismissed. This argument is only used when [dismissType] is equal
/// to `DismissType.onSwipe`. Defaults to `[DismissDirection.up]`
void showTopSnackBar(
OverlayState overlayState,
Widget child, {
Duration animationDuration = const Duration(milliseconds: 1200),
Duration reverseAnimationDuration = const Duration(milliseconds: 550),
Duration displayDuration = const Duration(milliseconds: 3000),
VoidCallback? onTap,
bool persistent = false,
ControllerCallback? onAnimationControllerInit,
EdgeInsets padding = const EdgeInsets.all(16),
Curve curve = Curves.elasticOut,
Curve reverseCurve = Curves.linearToEaseOut,
SafeAreaValues safeAreaValues = const SafeAreaValues(),
DismissType dismissType = DismissType.onTap,
List<DismissDirection> dismissDirection = const [DismissDirection.up],
}) {
late OverlayEntry _overlayEntry;
_overlayEntry = OverlayEntry(
builder: (_) {
return _TopSnackBar(
onDismissed: () {
_overlayEntry.remove();
_previousEntry = null;
},
animationDuration: animationDuration,
reverseAnimationDuration: reverseAnimationDuration,
displayDuration: displayDuration,
onTap: onTap,
persistent: persistent,
onAnimationControllerInit: onAnimationControllerInit,
padding: padding,
curve: curve,
reverseCurve: reverseCurve,
safeAreaValues: safeAreaValues,
dismissType: dismissType,
dismissDirections: dismissDirection,
child: child,
);
},
);
if (_previousEntry != null && _previousEntry!.mounted) {
_previousEntry?.remove();
}
overlayState.insert(_overlayEntry);
_previousEntry = _overlayEntry;
}
/// Widget that controls all animations
class _TopSnackBar extends StatefulWidget {
const _TopSnackBar({
Key? key,
required this.child,
required this.onDismissed,
required this.animationDuration,
required this.reverseAnimationDuration,
required this.displayDuration,
required this.padding,
required this.curve,
required this.reverseCurve,
required this.safeAreaValues,
required this.dismissDirections,
this.onTap,
this.persistent = false,
this.onAnimationControllerInit,
this.dismissType = DismissType.onTap,
}) : super(key: key);
final Widget child;
final VoidCallback onDismissed;
final Duration animationDuration;
final Duration reverseAnimationDuration;
final Duration displayDuration;
final VoidCallback? onTap;
final ControllerCallback? onAnimationControllerInit;
final bool persistent;
final EdgeInsets padding;
final Curve curve;
final Curve reverseCurve;
final SafeAreaValues safeAreaValues;
final DismissType dismissType;
final List<DismissDirection> dismissDirections;
@override
_TopSnackBarState createState() => _TopSnackBarState();
}
class _TopSnackBarState extends State<_TopSnackBar>
with SingleTickerProviderStateMixin {
late final Animation<Offset> _offsetAnimation;
late final AnimationController _animationController;
Timer? _timer;
final _offsetTween = Tween(begin: const Offset(0, -1), end: Offset.zero);
@override
void initState() {
_animationController = AnimationController(
vsync: this,
duration: widget.animationDuration,
reverseDuration: widget.reverseAnimationDuration,
);
_animationController.addStatusListener(
(status) {
if (status == AnimationStatus.completed && !widget.persistent) {
_timer = Timer(widget.displayDuration, () {
if (mounted) {
_animationController.reverse();
}
});
}
if (status == AnimationStatus.dismissed) {
_timer?.cancel();
widget.onDismissed.call();
}
},
);
widget.onAnimationControllerInit?.call(_animationController);
_offsetAnimation = _offsetTween.animate(
CurvedAnimation(
parent: _animationController,
curve: widget.curve,
reverseCurve: widget.reverseCurve,
),
);
if (mounted) {
_animationController.forward();
}
super.initState();
}
@override
void dispose() {
_animationController.dispose();
_timer?.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Positioned(
top: widget.padding.top,
left: widget.padding.left,
right: widget.padding.right,
child: SlideTransition(
position: _offsetAnimation,
child: SafeArea(
top: widget.safeAreaValues.top,
bottom: widget.safeAreaValues.bottom,
left: widget.safeAreaValues.left,
right: widget.safeAreaValues.right,
minimum: widget.safeAreaValues.minimum,
maintainBottomViewPadding:
widget.safeAreaValues.maintainBottomViewPadding,
child: _buildDismissibleChild(),
),
),
);
}
/// Build different type of [Widget] depending on [DismissType] value
Widget _buildDismissibleChild() {
switch (widget.dismissType) {
case DismissType.onTap:
return TapBounceContainer(
onTap: () {
widget.onTap?.call();
if (!widget.persistent && mounted) {
_animationController.reverse();
}
},
child: widget.child,
);
case DismissType.onSwipe:
var childWidget = widget.child;
for (final direction in widget.dismissDirections) {
childWidget = Dismissible(
direction: direction,
key: UniqueKey(),
dismissThresholds: const {DismissDirection.up: 0.2},
confirmDismiss: (direction) async {
if (!widget.persistent && mounted) {
if (direction == DismissDirection.down) {
await _animationController.reverse();
} else {
_animationController.reset();
}
}
return false;
},
child: childWidget,
);
}
return childWidget;
case DismissType.none:
return widget.child;
}
}
}
I am already try to add some "this" line beside the "context" line but still not worked
I am recently edit this post for some of comments requests and i am showing some post of showtopsnackbar and some error message that i am got.
I am hope this can become solution or reference to answer all of my error
CodePudding user response：
As you can see in example page you need to pass Overlay like this:
showTopSnackBar(
Overlay.of(context)!,
CustomSnackBar.error(
message: text,
),
);
the package updated but they didn't update the readme page.