import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart'; import 'package:lightmeter/res/dimens.dart'; import 'package:lightmeter/screens/settings/settings_page_route_builder.dart'; import 'components/animated_surface/animated_surface.dart'; import 'components/bottom_controls/bottom_controls.dart'; import 'components/exposure_pairs_list/exposure_pairs_list.dart'; import 'components/topbar/topbar.dart'; import 'metering_bloc.dart'; import 'metering_event.dart'; import 'metering_state.dart'; class MeteringScreen extends StatefulWidget { final AnimationController animationController; const MeteringScreen({required this.animationController, super.key}); @override State createState() => _MeteringScreenState(); } class _MeteringScreenState extends State { final _topBarKey = GlobalKey(debugLabel: 'TopBarKey'); final _middleAreaKey = GlobalKey(debugLabel: 'MiddleAreaKey'); final _bottomBarKey = GlobalKey(debugLabel: 'BottomBarKey'); bool _secondBuild = false; late double _topBarHeight; late double _middleAreaHeight; late double _bottomBarHeight; @override void initState() { super.initState(); WidgetsBinding.instance.addPostFrameCallback((_) { _topBarHeight = _getHeight(_topBarKey); _middleAreaHeight = _getHeight(_middleAreaKey); _bottomBarHeight = _getHeight(_bottomBarKey); setState(() { _secondBuild = true; }); }); } @override Widget build(BuildContext context) { return Scaffold( backgroundColor: Theme.of(context).colorScheme.background, body: BlocBuilder( builder: (context, state) { return Stack( children: [ Column( children: [ if (_secondBuild) SizedBox(height: _topBarHeight) else _topBar(state), Expanded( key: _middleAreaKey, child: Padding( padding: const EdgeInsets.symmetric(horizontal: Dimens.paddingM), child: Row( children: [ Expanded( flex: 2, child: ExposurePairsList(state.exposurePairs), ), const SizedBox(width: Dimens.grid16), const Spacer() ], ), ), ), if (_secondBuild) SizedBox(height: _bottomBarHeight) else _bottomBar(), ], ), if (_secondBuild) Positioned( left: 0, top: 0, right: 0, child: MeteringScreenAnimatedSurface.top( controller: widget.animationController, areaHeight: _topBarHeight, overflowSize: _middleAreaHeight / 2, child: _topBar(state), ), ), if (_secondBuild) Positioned( left: 0, right: 0, bottom: 0, child: MeteringScreenAnimatedSurface.bottom( controller: widget.animationController, areaHeight: _bottomBarHeight, overflowSize: _middleAreaHeight / 2, child: _bottomBar(), ), ), ], ); }, ), ); } Widget _topBar(MeteringState state) { return MeteringTopBar( key: _topBarKey, fastest: state.fastest, slowest: state.slowest, ev: state.ev, iso: state.iso, nd: state.nd, ); } Widget _bottomBar() { return MeteringBottomControls( key: _bottomBarKey, onSourceChanged: () {}, onMeasure: () => context.read().add(const MeasureEvent()), onSettings: () { Navigator.push(context, SettingsPageRouteBuilder()); }, ); } double _getHeight(GlobalKey key) => key.currentContext!.size!.height; }