m3_lightmeter/lib/screens/timer/screen_timer.dart

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import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:lightmeter/data/models/exposure_pair.dart';
import 'package:lightmeter/generated/l10n.dart';
import 'package:lightmeter/res/dimens.dart';
import 'package:lightmeter/screens/shared/animated_circular_button/widget_button_circular_animated.dart';
import 'package:lightmeter/screens/shared/bottom_controls_bar/widget_bottom_controls_bar.dart';
import 'package:lightmeter/screens/timer/bloc_timer.dart';
import 'package:lightmeter/screens/timer/components/metering_config/widget_metering_config_timer.dart';
import 'package:lightmeter/screens/timer/components/text/widget_text_timer.dart';
import 'package:lightmeter/screens/timer/components/timeline/widget_timeline_timer.dart';
import 'package:lightmeter/screens/timer/event_timer.dart';
import 'package:lightmeter/screens/timer/state_timer.dart';
import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
class TimerScreen extends StatefulWidget {
final ExposurePair exposurePair;
final IsoValue isoValue;
final NdValue ndValue;
final Duration duration;
const TimerScreen({
required this.exposurePair,
required this.isoValue,
required this.ndValue,
required this.duration,
super.key,
});
@override
State<TimerScreen> createState() => TimerScreenState();
}
@visibleForTesting
class TimerScreenState extends State<TimerScreen> with TickerProviderStateMixin {
late AnimationController timelineController;
late Animation<double> timelineAnimation;
late AnimationController startStopIconController;
late Animation<double> startStopIconAnimation;
@override
void initState() {
super.initState();
timelineController = AnimationController(vsync: this, duration: widget.duration);
timelineAnimation = Tween<double>(begin: 1, end: 0).animate(timelineController);
timelineController.addStatusListener((status) {
if (status == AnimationStatus.completed) {
context.read<TimerBloc>().add(const TimerEndedEvent());
}
});
startStopIconController = AnimationController(vsync: this, duration: Dimens.durationS);
startStopIconAnimation = Tween<double>(begin: 0, end: 1).animate(startStopIconController);
}
@override
void dispose() {
timelineController.dispose();
startStopIconController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return BlocListener<TimerBloc, TimerState>(
listenWhen: (previous, current) => previous.runtimeType != current.runtimeType,
listener: (context, state) => _updateAnimations(state),
child: Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
TimerMeteringConfig(
exposurePair: widget.exposurePair,
isoValue: widget.isoValue,
ndValue: widget.ndValue,
),
const Spacer(),
Padding(
padding: const EdgeInsets.all(Dimens.paddingL),
child: SizedBox.fromSize(
size: Size.square(MediaQuery.sizeOf(context).width - Dimens.paddingL * 4),
child: ValueListenableBuilder(
valueListenable: timelineAnimation,
builder: (_, value, child) => TimerTimeline(
progress: value,
child: TimerText(
timeLeft: Duration(milliseconds: (widget.duration.inMilliseconds * value).toInt()),
duration: widget.duration,
),
),
),
),
),
const Spacer(),
BottomControlsBar(
left: IconButton.filledTonal(
onPressed: () {
context.read<TimerBloc>().add(const ResetTimerEvent());
},
icon: const Icon(Icons.restore),
),
center: BlocBuilder<TimerBloc, TimerState>(
builder: (_, state) => AnimatedCircluarButton(
isPressed: state is TimerResumedState,
onPressed: () {
if (timelineAnimation.value == 0) {
return;
}
final event = state is TimerStoppedState ? const StartTimerEvent() : const StopTimerEvent();
context.read<TimerBloc>().add(event);
},
child: AnimatedIcon(
icon: AnimatedIcons.play_pause,
progress: startStopIconAnimation,
color: Theme.of(context).colorScheme.surface,
),
),
),
right: IconButton.filledTonal(
onPressed: Navigator.of(context).pop,
icon: const Icon(Icons.close),
tooltip: S.of(context).tooltipClose,
),
),
],
),
),
),
);
}
void _updateAnimations(TimerState state) {
switch (state) {
case TimerResetState():
startStopIconController.reverse();
timelineController.stop();
timelineController.animateTo(0, duration: Dimens.durationS);
case TimerResumedState():
startStopIconController.forward();
timelineController.forward();
case TimerStoppedState():
startStopIconController.reverse();
timelineController.stop();
}
}
}