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manually toggleable expandable mod

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julian 2022-10-31 11:51:16 -06:00
parent 817460b5e1
commit 3421602ba2
1 changed files with 18 additions and 2 deletions
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20
lib/widgets/expandable.dart
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@ -5,6 +5,11 @@ enum ExpandableState {
collapsed,
}
class ExpandableController {
VoidCallback? toggle;
ExpandableState state = ExpandableState.collapsed;
}
class Expandable extends StatefulWidget {
const Expandable({
Key? key,
@ -14,6 +19,7 @@ class Expandable extends StatefulWidget {
this.animation,
this.animationDurationMultiplier = 1.0,
this.onExpandChanged,
this.controller,
}) : super(key: key);
final Widget header;
@ -22,6 +28,7 @@ class Expandable extends StatefulWidget {
final Animation<double>? animation;
final double animationDurationMultiplier;
final void Function(ExpandableState)? onExpandChanged;
final ExpandableController? controller;
@override
State<Expandable> createState() => _ExpandableState();
@ -31,19 +38,28 @@ class _ExpandableState extends State<Expandable> with TickerProviderStateMixin {
late final AnimationController animationController;
late final Animation<double> animation;
late final Duration duration;
late final ExpandableController? controller;
ExpandableState _toggleState = ExpandableState.collapsed;
Future<void> toggle() async {
if (animation.isDismissed) {
await animationController.forward();
widget.onExpandChanged?.call(ExpandableState.collapsed);
_toggleState = ExpandableState.collapsed;
widget.onExpandChanged?.call(_toggleState);
} else if (animation.isCompleted) {
await animationController.reverse();
widget.onExpandChanged?.call(ExpandableState.expanded);
_toggleState = ExpandableState.expanded;
widget.onExpandChanged?.call(_toggleState);
}
controller?.state = _toggleState;
}
@override
void initState() {
controller = widget.controller;
controller?.toggle = toggle;
duration = Duration(
milliseconds: (500 * widget.animationDurationMultiplier).toInt(),
);