tsacdop-podcast-app-android/lib/intro_slider/app_intro.dart

185 lines
6.8 KiB
Dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:provider/provider.dart';
import '../home/home.dart';
import '../state/setting_state.dart';
import '../util/extension_helper.dart';
import '../util/pageroute.dart';
import 'firstpage.dart';
import 'fourthpage.dart';
import 'secondpage.dart';
import 'thirdpage.dart';
enum Goto { home, settings }
class SlideIntro extends StatefulWidget {
final Goto goto;
SlideIntro({this.goto, Key key}) : super(key: key);
@override
_SlideIntroState createState() => _SlideIntroState();
}
class _SlideIntroState extends State<SlideIntro> {
//final List<BoxShadow> _customShadow = [
// BoxShadow(blurRadius: 2, offset: Offset(-2, -2), color: Colors.white54),
// BoxShadow(
// blurRadius: 8,
// offset: Offset(2, 2),
// color: Colors.grey[600].withOpacity(0.4))
//];
PageController _controller;
double _position;
@override
void initState() {
super.initState();
_position = 0;
_controller = PageController()
..addListener(() {
setState(() {
_position = _controller.page;
});
});
}
@override
void dispose() {
_controller.dispose();
super.dispose();
}
Widget _indicatorWidget(int index) {
final distance = (_position - index).abs();
final size = distance > 1 ? 10.0 : 10 * (2 - distance);
return Center(
child: Container(
alignment: Alignment.center,
child: distance < 0.2
? Text(
(index + 1).toString(),
style: TextStyle(color: Color.fromRGBO(35, 204, 198, 1)),
)
: Center(),
height: size,
width: size,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: Colors.white,
),
),
);
}
@override
Widget build(BuildContext context) {
return AnnotatedRegion<SystemUiOverlayStyle>(
value: SystemUiOverlayStyle(
statusBarBrightness: Brightness.light,
systemNavigationBarIconBrightness: Brightness.dark),
child: Scaffold(
backgroundColor: Colors.grey[100],
body: Container(
child: Stack(
children: <Widget>[
PageView(
physics: const PageScrollPhysics(),
controller: _controller,
scrollDirection: Axis.horizontal,
children: <Widget>[
FirstPage(),
SecondPage(),
ThirdPage(),
FourthPage(),
],
),
Positioned(
bottom: 0,
left: 0,
child: Container(
color: Colors.grey[100].withOpacity(0.5),
width: context.width,
padding:
EdgeInsets.only(left: 40, right: 20, bottom: 30, top: 20),
child: Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
SizedBox(
width: context.width / 3,
child: Row(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
_indicatorWidget(0),
_indicatorWidget(1),
_indicatorWidget(2),
_indicatorWidget(3)
],
),
),
Spacer(),
Container(
alignment: Alignment.center,
height: 40,
width: 80,
decoration: BoxDecoration(
border: Border.all(width: 1, color: Colors.white),
borderRadius: BorderRadius.circular(20),
color: Colors.white,
//boxShadow: _customShadow,
),
child: Material(
color: Colors.transparent,
child: _position < 2.5
? InkWell(
borderRadius:
BorderRadius.all(Radius.circular(20)),
onTap: () => _controller.animateToPage(
_position.toInt() + 1,
duration: Duration(milliseconds: 200),
curve: Curves.linear),
child: SizedBox(
height: 40,
width: 80,
child: Center(
child: Text(context.s.next,
style: TextStyle(
color: Colors.black,
fontWeight:
FontWeight.bold)))))
: InkWell(
borderRadius: BorderRadius.circular(20),
onTap: () {
if (widget.goto == Goto.home) {
Navigator.push(context,
SlideLeftRoute(page: Home()));
Provider.of<SettingState>(context,
listen: false)
.saveShowIntro(1);
} else if (widget.goto == Goto.settings) {
Navigator.pop(context);
}
},
child: SizedBox(
height: 40,
width: 80,
child: Center(
child: Text(context.s.done,
style: TextStyle(
color: Colors.black,
fontWeight:
FontWeight.bold))))),
),
),
],
),
),
),
],
),
),
),
);
}
}