Related
I want when I click on the + Button it shows the next 3 containers that in the listVeiw it is horizontally direction.
Here is my code.
when I tap for the first time it works, but it doesn't work for the others taps
import 'package:flutter/material.dart';
class FindCars extends StatefulWidget {
const FindCars({Key? key}) : super(key: key);
#override
State<NewWayToFindCars> createState() => _NewWayToFindCarsState();
}
class _NewWayToFindCarsState extends State<NewWayToFindCars> {
var pricesListNumber = 10;
int counter = 1;
List months = [
'يناير',
'فبراير',
'مارس',
'ابريل',
'مايو',
'يونيو',
'يوليو',
'اغسطس',
'سبتمبر',
'اكتوبر',
'نوفمبر',
'ديسمبر'
];
var currentMonth = new DateTime.now().month;
var currentDay = new DateTime.now().day;
late ScrollController _scrollController;
#override
void initState() {
_scrollController = ScrollController();
super.initState();
}
#override
Widget build(BuildContext context) {
print(months[currentMonth - 1]);
print(currentDay);
print(DateTime.now());
return Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
child: Directionality(
textDirection: TextDirection.rtl,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Text(
'${months[currentMonth - 1]} 2022',
style: TextStyle(
fontSize: 20,
fontWeight: FontWeight.bold,
color: Colors.black,
fontFamily: 'cairo',
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
InkWell(
onTap: () {
_scrollController.animateTo(-200,
duration: const Duration(milliseconds: 500),
curve: Curves.easeInOut);
},
child: Container(
child: Icon(Icons.remove, size: 22),
width: 50,
height: 50,
decoration: BoxDecoration(
color: Color(0xFFDCEDC8).withOpacity(0.5),
border: Border.all(
color: Color(0xFFDDE7DD).withOpacity(0.5),
width: 2.5,
),
borderRadius: BorderRadius.only(
topLeft: Radius.circular(10),
bottomLeft: Radius.circular(10),
),
),
),
),
InkWell(
onTap: () {
_scrollController.animateTo(200,
duration: const Duration(milliseconds: 500),
curve: Curves.easeInOut);
},
child: Container(
child: Center(child: Icon(Icons.add_sharp, size: 22)),
width: 50,
height: 50,
decoration: BoxDecoration(
color: Color(0xFFDCEDC8).withOpacity(0.25),
border: Border.all(
color: Color(0xFFDDE7DD).withOpacity(0.5),
width: 2.5,
),
borderRadius: BorderRadius.only(
topRight: Radius.circular(10),
bottomRight: Radius.circular(10),
),
),
),
),
],
),
Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height * 0.1,
child: ListView(
controller: _scrollController, // scroll contoller
scrollDirection: Axis.horizontal,
children: new List.generate(
pricesListNumber,
(index) => Padding(
padding: const EdgeInsets.all(8.0),
child: Container(
child: Center(child: Text('${currentDay++}')),
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 5,
blurRadius: 7,
offset: Offset(0, 3), // changes position of shadow
),
],
color: Color(0xFFDCEDC8).withOpacity(0.5),
border: Border.all(
color: Color(0xFFDDE7DD).withOpacity(0.5),
width: 2.5,
),
borderRadius: BorderRadius.circular(10),
),
height: 50,
width: MediaQuery.of(context).size.width * 0.25,
),
),
),
),
),
],
),
),
);
}
}
Here is my code for the UI, and now it is only works in the first click put it does not work until the end.
Can you please help me with that?
Attach a ScrollController to your scrollable widget and then use scrollController.animateTo(//offset) to reach where you want.
Do check the animateTo method on this page.
EDIT:
sample code:
ScrollController scrollController = ScrollController();
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutter'),
centerTitle: true,
),
body: Column(
children: [
ElevatedButton(
onPressed: () {
scrollController.animateTo(0,
duration: Duration(seconds: 1), curve: Curves.easeIn);
},
child: Text("go top")),
Expanded(
flex: 1,
child: ListView.builder(
controller: scrollController,
itemCount: 100,
itemBuilder: (context, index) {
return Text('This is it.');
},
),
),
],
),
);
}
Try it in your IDE.
EDIT:
Here is the problem in your code, you need to decrease/increase the current offset of the scroll controller by subtracting/adding 200 from the scrollController.position. You are getting it moved for the first time because at that time offset is not at 200 and for the second time it is there at 200. That is why it is not moving which is obviously no error.
Just use a scrollController, attach it to your ListView builder,
then on your Button's onPress/onTap method, call _scrolController.animateTo(someOffset)
Copy the code below and run into your project. I have customized it based on your needs.
import 'package:flutter/material.dart';
class TestView extends StatefulWidget {
const TestView({Key? key}) : super(key: key);
#override
State<TestView> createState() => _TestViewState();
}
class _TestViewState extends State<TestView> {
late ScrollController _scrollController;
#override
void initState() {
_scrollController = ScrollController();
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
ElevatedButton(
onPressed: () {
_scrollController.animateTo(-500,
duration: const Duration(milliseconds: 500),
curve: Curves.easeInOut);
},
child: const Text("-")),
ElevatedButton(
onPressed: () {
_scrollController.animateTo(500,
duration: const Duration(milliseconds: 500),
curve: Curves.easeInOut);
},
child: const Text("+"),
),
],
),
SizedBox(
height: 200,
child: ListView(
controller: _scrollController,
scrollDirection: Axis.horizontal,
children: List.generate(20, (index) {
return Container(
color: Colors.amber,
height: 100,
width: 100,
margin: const EdgeInsets.only(right: 10),
child: Center(child: Text("$index")),
);
}),
),
)
],
),
);
}
}
I am creating a Journal mobile application which would work as a medium to view magazines and daily news updates. This is my first flutter project and I am totally new to flutter. So kindly excuse me if I had said something wrong about something or didnt provide enough information.
I used a code from github for the main page of my application and made few changes to accommodate my needs. Now in my code, the home page consists of a side menu bar and this bar consists of 4 buttons, namely Home, My Profile, Premium and FAQ. The GlobalKeys for the side menu bar is called using a list by the name _keys which is of the type GlobalKey. I tried changing the data type of the list _keys to Widget and then called the corresponding Widgets of the classes. But then two errors popped out.
The getter 'currentContext' isn't defined for the class 'Widget'.
The argument type 'Widget' can't be assigned to the parameter type 'GlobalKey<State>'.
Now I would like the list _keys to be of the type Widget in order for me to call upon it's corresponding widgets of Home, My Profile, Premium and FAQ from each of it's classes in order for me to view the corresponding pages. Or if it is not possible, I would love to know an alternative for it to start working.
Following is the code of my application.
import 'dart:math' as math;
import 'package:flutter/scheduler.dart';
import 'package:google_signin_example/google%20sign%20in/logged_in_widget.dart';
import 'package:google_signin_example/main app/lib/ui_3/TravelBean.dart';
import 'package:google_signin_example/main app/lib/ui_3/magazine/screens/home_screen.dart';
import 'package:google_signin_example/main%20app/lib/ui_3/FAQ/faq.dart';
import 'package:google_signin_example/main%20app/lib/ui_3/Newspaper%20and%20Kiddos/lib_kiddos/main.dart';
import 'package:google_signin_example/main%20app/lib/ui_3/Newspaper%20and%20Kiddos/lib_news/main.dart';
import 'package:google_signin_example/main%20app/lib/ui_3/premium/premium.dart';
import 'package:google_signin_example/widget/sign_up_widget.dart';
import 'detail_page.dart';
class HomePage1 extends StatefulWidget {
#override
_HomePage1State createState() => _HomePage1State();
}
class _HomePage1State extends State<HomePage1> {
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
body: Container(
child: Row(
children: <Widget>[
LeftWidget(),
Expanded(
child: RightWidget(),
)
],
),
),
);
}
}
class LeftWidget extends StatefulWidget {
#override
_LeftWidgetState createState() => _LeftWidgetState();
}
class _LeftWidgetState extends State<LeftWidget> with TickerProviderStateMixin {
List<String> _list = ["Home", "My profile", "Premium", "FAQ"];
List <Widget> _keys = [
HomePage1(), //These are the widgets from different classes.
LoggedInWidget(),
premium(),
faq(),
/*GlobalKey(), //This was available before I made the changes.
GlobalKey(),
GlobalKey(),
GlobalKey()*/
];
int checkIndex = 0;
Offset checkedPositionOffset = Offset(0, 0);
Offset lastCheckOffset = Offset(0, 0);
Offset animationOffset = Offset(0, 0);
Animation _animation;
AnimationController _animationController;
#override
void initState() {
checkIndex = _list.length - 1;
super.initState();
SchedulerBinding.instance.endOfFrame.then((value) {
calcuteCheckOffset();
addAnimation();
});
}
void calcuteCheckOffset() {
lastCheckOffset = checkedPositionOffset;
RenderBox renderBox = _keys[checkIndex].currentContext.findRenderObject(); //This is where the first error occurs.
Offset widgetOffset = renderBox.localToGlobal(Offset(0, 0));
Size widgetSise = renderBox.size;
checkedPositionOffset = Offset(widgetOffset.dx + widgetSise.width,
widgetOffset.dy + widgetSise.height);
}
#override
Widget build(BuildContext context) {
return Container(
child: Stack(
children: <Widget>[
Container(
width: 50,
decoration: BoxDecoration(
color: Color(0xff000000),
borderRadius: BorderRadius.circular(30),
),
child: Column(
children: _buildList(),
),
),
Positioned(
top: animationOffset.dy,
left: animationOffset.dx,
child: CustomPaint(
painter: CheckPointPainter(Offset(10, 0)),
),
)
],
),
);
}
List<Widget> _buildList() {
List<Widget> _widget_list = [];
_widget_list.add(Padding(
padding: EdgeInsets.only(
top: 50,
),
child: Icon(
Icons.settings,
color: Colors.white,
size: 30,
),
));
for (int i = 0; i < _list.length; i++) {
_widget_list.add(Expanded(
child: GestureDetector(
onTap: () {
indexChecked(i);
},
child: VerticalText(
_list[i],
_keys[i], //This is where the second error occurs.
checkIndex == i &&
(_animationController != null &&
_animationController.isCompleted))),
));
}
_widget_list.add(Padding(
padding: EdgeInsets.only(
top: 50,
bottom: 50,
),
child: Image(image: AssetImage('assets/images/Voix.png')),
));
return _widget_list;
}
void indexChecked(int i) {
if (checkIndex == i) return;
setState(() {
checkIndex = i;
calcuteCheckOffset();
addAnimation();
});
}
void addAnimation() {
_animationController =
AnimationController(duration: Duration(milliseconds: 300), vsync: this)
..addListener(() {
setState(() {
animationOffset =
Offset(checkedPositionOffset.dx, _animation.value);
});
});
_animation = Tween(begin: lastCheckOffset.dy, end: checkedPositionOffset.dy)
.animate(CurvedAnimation(
parent: _animationController, curve: Curves.easeInOutBack));
_animationController.forward();
}
}
class CheckPointPainter extends CustomPainter {
double pointRadius = 5;
double radius = 30;
Offset offset;
CheckPointPainter(this.offset);
#override
void paint(Canvas canvas, Size size) {
Paint paint = Paint()..style = PaintingStyle.fill;
double startAngle = -math.pi / 2;
double sweepAngle = math.pi;
paint.color = Color(0xff000000);
canvas.drawArc(
Rect.fromCircle(center: Offset(offset.dx, offset.dy), radius: radius),
startAngle,
sweepAngle,
false,
paint);
paint.color = Color(0xffffffff);
canvas.drawCircle(
Offset(offset.dx - pointRadius / 2, offset.dy - pointRadius / 2),
pointRadius,
paint);
}
#override
bool shouldRepaint(CustomPainter oldDelegate) {
return true;
}
}
class VerticalText extends StatelessWidget {
String name;
bool checked;
GlobalKey globalKey;
VerticalText(this.name, this.globalKey, this.checked);
#override
Widget build(BuildContext context) {
return RotatedBox(
key: globalKey,
quarterTurns: 3,
child: Text(
name,
style: TextStyle(
color: checked ? Color(0xffffffff) : Colors.grey,
fontSize: 16,
),
),
);
}
}
class RightWidget extends StatefulWidget {
#override
_RightWidgetState createState() => _RightWidgetState();
}
class _RightWidgetState extends State<RightWidget>
with TickerProviderStateMixin {
TabController _tabController;
#override
void initState() {
super.initState();
_tabController = TabController(vsync: this, length: 5);
}
#override
Widget build(BuildContext context) {
return Container(
margin: EdgeInsets.only(
left: 15,
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: EdgeInsets.only(top: 50, left: 20),
child: Text(
"Voix Home",
style: TextStyle(
color: Colors.black,
fontSize: 25,
),
),
),
Padding(
padding: const EdgeInsets.only(top: 15, left: 10),
child: SizedBox(
height: 30,
child: TabBar(
isScrollable: true,
unselectedLabelColor: Colors.black,
labelColor: Color(0xffffffff),
controller: _tabController,
indicator: BoxDecoration(
color: Color(0xff9e9e9e),
borderRadius: BorderRadius.only(
topRight: Radius.circular(20),
bottomLeft: Radius.circular(20),
),
),
tabs: <Widget>[
Tab(
text: "Flash",
),
Tab(
text: "Magazine",
),
Tab(
text: "Newspaper",
),
Tab(
text: "Kiddos",
),
Tab(
text: "Editorial",
),
],
),
),
),
Expanded(
child: TabBarView(
controller: _tabController,
children: <Widget>[
TravelWidget(),
HomeScreen(),
News(),
Kiddos(),
RightBody(),
// RightBody(),
],
),
)
],
),
);
}
}
class RightBody extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Container(
margin: EdgeInsets.only(
left: 15,
),
color: Colors.white,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Padding(
padding: EdgeInsets.only(
top: 20,
),
child: Text(
"Flash!",
style: TextStyle(
color: Colors.black,
fontSize: 20,
),
),
),
Expanded(
child: ListView(
scrollDirection: Axis.horizontal,
children: <Widget>[
Container(
width: 220,
margin: EdgeInsets.symmetric(
horizontal: 10,
vertical: 10,
),
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(40),
image: new DecorationImage(
image: new AssetImage('assets/images/bottom1.jpg'),
fit: BoxFit.cover,
),
boxShadow: [
BoxShadow(
spreadRadius: 5,
blurRadius: 5,
offset: Offset(1, 2),
color: Color(0x33757575),
),
],
),
),
Container(
width: 220,
margin: EdgeInsets.symmetric(
horizontal: 10,
vertical: 10,
),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(40),
boxShadow: [
BoxShadow(
spreadRadius: 5,
blurRadius: 5,
offset: Offset(1, 2),
color: Color(0x33757575),
),
],
),
),
],
),
),
],
),
);
}
}
class TravelWidget extends StatelessWidget {
List<TravelBean> _list = TravelBean.generateTravelBean();
#override
Widget build(BuildContext context) {
return PageView.builder(
controller: PageController(viewportFraction: 0.9),
itemBuilder: (context, index) {
var bean = _list[index];
return GestureDetector(
onTap: () {
Navigator.of(context).push(MaterialPageRoute(builder: (context) {
return DetailPage(bean);
}));
},
child: Hero(
tag: bean.url,
child: Stack(
children: <Widget>[
Padding(
padding: const EdgeInsets.only(bottom: 30, right: 10),
child: ClipRRect(
borderRadius: BorderRadius.circular(5),
child: Image.asset(
bean.url,
width: MediaQuery.of(context).size.width,
fit: BoxFit.cover,
),
),
),
Positioned(
bottom: 80,
left: 15,
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Material(
color: Colors.transparent,
child: Text(
bean.location,
style: TextStyle(
color: Colors.black54,
fontSize: 15,
),
),
),
Material(
color: Colors.transparent,
child: Text(
bean.name,
style: TextStyle(
color: Colors.black,
fontSize: 20,
),
),
),
],
),
),
Positioned(
bottom: 0,
right: 30,
child: Container(
width: 60,
height: 60,
decoration: BoxDecoration(
color: Colors.black,
borderRadius: BorderRadius.circular(30),
),
child: Icon(
Icons.arrow_forward,
color: Colors.white,
size: 30,
),
),
)
],
),
),
);
},
itemCount: _list.length,
);
}
}
At the beginning, when I leave the list _keys to be of the type GlobalKey and don't comment out the following 4 GlobalKeys I get the output but the side menu bar won't work.
This is my application with GlobalKeys in place of those Widgets
I want those corresponding pages to display when clicked on. But that render object just switches between the options and the same page is displayed.
So kindly help me out.
PS : As said earlier I'm new to flutter, so kindly don't mistake me if I had something wrong.
I suggest you check about flutter state management, especially Mobx with Provider, it will be kind easier for you.
I am currently working on the ui stuff for the appliction, so the thing is i have one gesture as a parent that swipes up and down and based on it the position of the widgets gets changed but the problem is the child gesture does not get any precedence when tapped on it it gives the precedence. So my tree structure is Pageview.builder which has single widget with topmost parent as Gesturedetector and the children accrodingly, Can any one tell me what i am doing wrong or any improvements to get the gesture for each.
Below is the sample code that i have been working on:
import 'dart:math';
import 'package:LocationAnimation/Model/device_model.dart';
import 'package:LocationAnimation/SplashPage/splash_page.dart';
import 'package:LocationAnimation/widgets/device_function_widget.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:google_fonts/google_fonts.dart';
import 'Model/device_model.dart' as devices;
import 'Model/locations_model.dart' as locations;
import 'extensions/capitalize.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'HAL',
home: MyHomePage(),
);
}
}
class SampleList {
final String locationName;
SampleList({this.locationName});
}
class MyHomePage extends StatefulWidget {
#override
State createState() => new MyHomePageState();
}
class MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
final _controller = new PageController();
final _kArrowColor = Colors.black.withOpacity(0.8);
bool _isSwipe = false;
bool _isLoading = false;
var list = [
SampleList(locationName: 'Living Room'),
SampleList(locationName: 'Bed Room'),
SampleList(locationName: 'Back Porch Lights'),
SampleList(locationName: 'Basement Porch Lights'),
SampleList(locationName: 'Sample Room'),
];
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new IconTheme(
data: new IconThemeData(color: _kArrowColor),
child: new Stack(
children: <Widget>[
new PageView.builder(
physics: _isSwipe
? NeverScrollableScrollPhysics()
: AlwaysScrollableScrollPhysics(),
controller: _controller,
itemCount: list.length,
itemBuilder: (BuildContext context, int index) {
return LocationDetails(
isLoading: _isLoading,
item: list[index],
onSwipeDown: () {
setState(() {
_isSwipe = false;
});
},
onSwipeUp: () {
setState(() {
_isSwipe = true;
});
},
);
},
),
],
),
),
);
}
}
class LocationDetails extends StatefulWidget {
final bool isLoading;
SampleList item;
final Function() onSwipeUp;
final Function() onSwipeDown;
LocationDetails(
{Key key, this.item, this.onSwipeUp, this.onSwipeDown, this.isLoading})
: super(key: key);
#override
_LocationDetailsState createState() => _LocationDetailsState();
}
class _LocationDetailsState extends State<LocationDetails> {
DragStartDetails startVerticalDragDetails;
DragUpdateDetails updateVerticalDragDetails;
bool moveWidget = false;
bool dismissSwipeText = true;
bool _isRotate = false;
int currentSelectedIndex = 0;
bool ignoreChildGestures = true;
bool _isSwpie = false;
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Container(
child: GestureDetector(
onTap: () {
print('Tap');
},
onVerticalDragStart: (dragDetails) {
startVerticalDragDetails = dragDetails;
},
onVerticalDragUpdate: (dragDetails) {
updateVerticalDragDetails = dragDetails;
},
onVerticalDragEnd: (endDetails) {
double dx = updateVerticalDragDetails.globalPosition.dx -
startVerticalDragDetails.globalPosition.dx;
double dy = updateVerticalDragDetails.globalPosition.dy -
startVerticalDragDetails.globalPosition.dy;
double velocity = endDetails.primaryVelocity;
//Convert values to be positive
if (dx < 0) dx = -dx;
if (dy < 0) dy = -dy;
if (velocity < 0) {
widget.onSwipeUp();
print('drag up');
setState(() {
moveWidget = true;
_isSwpie = true;
});
} else {
widget.onSwipeDown();
print(' drag down');
setState(() {
moveWidget = false;
_isSwpie = false;
});
}
},
child: Container(
height: MediaQuery.of(context).size.height,
width: MediaQuery.of(context).size.width,
decoration: new BoxDecoration(
image: new DecorationImage(
colorFilter: ColorFilter.mode(
Colors.black.withOpacity(0.8), BlendMode.srcOver),
image: /* moveWidget
? */
AssetImage(
'Assets/backgroundImage.jpg',
),
/* : NetworkImage(widget.samplePage.networkImage), */
fit: BoxFit.fill,
),
),
child:
/* widget.isLoading
? Center(
child: CircularProgressIndicator(),
)
: */
Stack(
children: <Widget>[
AnimatedOpacity(
opacity: moveWidget ? 0 : 1,
duration: Duration(microseconds: 100),
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Column(
children: <Widget>[
Icon(
Icons.power_settings_new,
color: Colors.white,
size: 30,
),
Icon(
Icons.more_horiz,
color: Colors.white,
size: 25,
)
],
),
Row(
children: <Widget>[
Column(
children: <Widget>[
Text(
'Inside Temp',
style: TextStyle(
color: Colors.white, fontSize: 18),
),
SizedBox(
height: 5,
),
Row(
children: <Widget>[
Icon(
Icons.ac_unit,
color: Colors.white,
size: 20,
),
SizedBox(
width: 10,
),
Text(
'19 C',
style: TextStyle(color: Colors.white),
),
],
)
],
),
SizedBox(
width: 10,
),
Column(
children: <Widget>[
Text(
'Outside Temp',
style: TextStyle(
color: Colors.white, fontSize: 18),
),
SizedBox(
height: 5,
),
Row(
children: <Widget>[
Icon(
Icons.ac_unit,
color: Colors.white,
size: 20,
),
SizedBox(
width: 10,
),
Text(
'19 C',
style: TextStyle(color: Colors.white),
),
],
)
],
),
],
)
],
),
),
),
AnimatedPositioned(
onEnd: () {
setState(() {
dismissSwipeText = !dismissSwipeText;
//print(dismissSwipeText);
});
},
curve: Curves.ease,
duration: Duration(milliseconds: 700),
bottom: moveWidget
? 10
: MediaQuery.of(context).size.height * 0.18,
left: 10.0,
right: 0.0,
top: moveWidget
? 50
: MediaQuery.of(context).size.height * 0.75,
child: AnimatedOpacity(
opacity: dismissSwipeText ? 1 : 0,
duration: Duration(milliseconds: 500),
child: Text(
'Swipe up to customize',
style: TextStyle(color: Colors.white, fontSize: 20),
),
),
),
AnimatedPositioned(
curve: Curves.ease,
duration: Duration(milliseconds: 700),
onEnd: () {
setState(() {
_isSwpie = true;
});
},
left: 10,
top: moveWidget
? 80
: MediaQuery.of(context).size.height * 0.80,
child: Container(
width: MediaQuery.of(context).size.width * 0.97,
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
GestureDetector(
onTap: () {
setState(() {
currentSelectedIndex = 0;
});
},
child: Container(
width: MediaQuery.of(context).size.width * 0.20,
height:
MediaQuery.of(context).size.height * 0.10,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: currentSelectedIndex == 0
? Colors.blue
: Colors.grey[900],
),
child: Center(
child: Text(
'Lights',
style: GoogleFonts.lato(
color: Colors.white,
fontWeight: FontWeight.w700),
)),
),
),
Row(
children: <Widget>[
SizedBox(
width: 10,
),
GestureDetector(
onTap: () {
setState(() {
currentSelectedIndex = 1;
});
},
child: Container(
width: MediaQuery.of(context).size.width *
0.20,
height: MediaQuery.of(context).size.height *
0.10,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: currentSelectedIndex == 1
? Colors.blue
: Colors.grey[900],
),
child: Center(
child: Text(
'Applicanes',
style: GoogleFonts.lato(
color: Colors.white,
fontWeight: FontWeight.w700),
)),
),
),
],
),
Row(
children: <Widget>[
SizedBox(
width: 10,
),
GestureDetector(
onTap: () {
setState(() {
currentSelectedIndex = 2;
});
},
child: Container(
width: MediaQuery.of(context).size.width *
0.20,
height: MediaQuery.of(context).size.height *
0.10,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: currentSelectedIndex == 2
? Colors.blue
: Colors.grey[900],
),
child: Center(
child: Text(
'Sensors',
style: GoogleFonts.lato(
color: Colors.white,
fontWeight: FontWeight.w700),
)),
),
),
],
),
Row(
children: <Widget>[
SizedBox(
width: 10,
),
Container(
width:
MediaQuery.of(context).size.width * 0.20,
height:
MediaQuery.of(context).size.height * 0.10,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: Colors.grey[900],
),
child: Center(
child: Text(
'Doors \n& Locks',
style: GoogleFonts.lato(
color: Colors.white,
fontWeight: FontWeight.w700),
)),
),
],
),
SizedBox(
width: 10,
),
],
),
),
),
AnimatedPositioned(
curve: Curves.ease,
duration: Duration(milliseconds: 400),
bottom: moveWidget
? 10
: MediaQuery.of(context).size.height * 0.20,
left: 10.0,
right: 0.0,
top: moveWidget
? 15
: MediaQuery.of(context).size.height * 0.70,
child: Text(
'${widget.item.locationName}',
style: TextStyle(fontSize: 30, color: Colors.white),
),
),
],
)),
),
),
),
);
}
}
You can add Color to the last AnimatedPositioned which use text widget.item.locationName in your code, like:
AnimatedPositioned(
curve: Curves.ease,
duration: Duration(milliseconds: 400),
bottom: moveWidget
? 10
: MediaQuery.of(context).size.height * 0.20,
left: 10.0,
right: 0.0,
top: moveWidget
? 15
: MediaQuery.of(context).size.height * 0.70,
child: Container(
color: Colors.white,
Text(
'${widget.item.locationName}',
style: TextStyle(fontSize: 30, color: Colors.white),
),
),
),
You will see a white screen (the widget which blocking you) when you scroll up. You can fix it by 2 ways
Change the bottom 10 to a larger number
Move this part of AnimatedPositioned to Top of the Stack widget
The Nested Gesture should work probably as you expected.
First of All you are using multiple Scaffold in a single page which is not recommended.
And remove the unwanted widgets from your tree which will help you to debug a way more better level. And Next you can try with passing a Callback function from parent to child which can eventually solve your problem
I am not able to scroll my flutter app body. As it is giving overflow error all the time. Please see the code below and help me.
Body.dart code
import 'package:flutter/material.dart';
import 'CustomGridview.dart';
class MyCustomBody extends StatefulWidget {
#override
_MyCustomBodyState createState() => _MyCustomBodyState();
}
class _MyCustomBodyState extends State<MyCustomBody> {
#override
Widget build(BuildContext context) {
double height = MediaQuery.of(context).size.height;
double width = MediaQuery.of(context).size.width;
return SingleChildScrollView(
child: Column(
children: [
Stack(
overflow: Overflow.visible,
children: [
CustomPaint(
painter: MyCustomPainter(),
child: ClipPath(
clipper: MyCustomClip(),
child: Container(
decoration: new BoxDecoration(
gradient: new LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [
color.custombarG1,
color.custombarG2,
],
),
),
height: height / 2 - 50,
width: width,
),
),
),
Positioned(
left: -40.0,
top: 10.0,
child: Image.asset(
'assets/images/covid3.png',
height: 310.0,
),
),
Align(
alignment: Alignment.topRight,
child: Padding(
padding: const EdgeInsets.only(top: 20.0, right: 2.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.end,
children: [
Text(
'CoVID-19',
style: TextStyle(
color: color.writingTitle,
fontSize: 40.0,
fontWeight: FontWeight.bold,
),
),
Padding(
padding: const EdgeInsets.all(3.0),
child: Text(
'TRACKER',
style: TextStyle(
color: color.primary,
fontSize: 30.0,
fontStyle: FontStyle.italic,
fontWeight: FontWeight.bold,
height: 1.2,
),
),
),
Padding(
padding: const EdgeInsets.only(right: 40),
child: Text(
'+',
style: TextStyle(
color: color.writingHead,
fontSize: 35.0,
height: 0.75,
),
),
),
Padding(
padding: const EdgeInsets.only(right: 12.0),
child: Text(
'CASES',
style: TextStyle(
color: color.writingTitle,
fontSize: 30.0,
fontStyle: FontStyle.italic,
),
),
),
Text(
'IN SECONDS',
style: TextStyle(
color: color.writingSubHead,
fontSize: 35.0,
fontWeight: FontWeight.bold,
fontFamily: 'Poppins',
height: 1.5,
),
),
Text(
'WorldWide',
style: TextStyle(
color: color.writingTitle,
fontSize: 30.0,
fontWeight: FontWeight.bold,
fontFamily: 'Poppins',
height: 3.5,
),
),
],
),
),
),
],
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
Container(
height: MediaQuery.of(context).size.height / 4,
width: MediaQuery.of(context).size.width / 1.5,
child: Card(
color: color.cardTotalBg,
child: Text(
'hello There',
),
),
),
],
),
);
}
}
class MyCustomClip extends CustomClipper<Path> {
#override
Path getClip(Size size) {
Path path = new Path();
path.lineTo(0.0, size.height - 80);
var firstCPoint = new Offset((size.width / 4) - 20, (size.height) / 2 - 50);
var firstEPoint = new Offset((size.width / 2 + 30), size.height - 70);
path.quadraticBezierTo(
firstCPoint.dx, firstCPoint.dy, firstEPoint.dx, firstEPoint.dy);
var secondCPoint = new Offset(size.width * 0.9, size.height + 60);
var secondEPoint = new Offset(size.width, size.height / 2 + 50);
path.quadraticBezierTo(
secondCPoint.dx, secondCPoint.dy, secondEPoint.dx, secondEPoint.dy);
path.lineTo(size.width, 0.0);
path.close();
return path;
}
#override
bool shouldReclip(CustomClipper<Path> oldClipper) {
return false;
}
}
class MyCustomPainter extends CustomPainter {
#override
void paint(Canvas canvas, Size size) {
Path path = new Path();
path.lineTo(0.0, size.height - 80);
var firstCPoint = new Offset((size.width / 4) - 20, (size.height) / 2 - 50);
var firstEPoint = new Offset((size.width / 2 + 30), size.height - 70);
path.quadraticBezierTo(
firstCPoint.dx, firstCPoint.dy, firstEPoint.dx, firstEPoint.dy);
var secondCPoint = new Offset(size.width * 0.9, size.height + 60);
var secondEPoint = new Offset(size.width, size.height / 2 + 50);
path.quadraticBezierTo(
secondCPoint.dx, secondCPoint.dy, secondEPoint.dx, secondEPoint.dy);
path.lineTo(size.width, 0.0);
path.close();
canvas.drawShadow(path, color.custombarG2, 30.0, false);
}
#override
bool shouldRepaint(CustomPainter oldDelegate) {
return true;
}
}
This is home.dart code
import 'package:CovidTraces/body.dart';
import 'package:CovidTraces/constraints.dart';
import 'package:CovidTraces/customnavbar.dart';
import 'package:flutter/material.dart';
import 'customappbar.dart';
Constraints color = new Constraints();
class HomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Column(
children: [
CustomAppBar(),
MyCustomBody(),
],
),
bottomNavigationBar: MyCustomNavBar(),
),
);
}
}
Kindly help me please I am facing a lot of such errors in flutter.
In this I am not able to make my UI scrollable after using single child scroll view also.
Reason for the error:
Column expands to the maximum size in main axis direction (vertical axis), and so does the SingleChildScrollView.
Solutions
So, you need to constrain the height of the SingleChildScrollView. There are many ways of doing it, you can choose that best suits your need.
Use an Expanded widget to allow the SingleChildScrollView take up the remaining space.
class HomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Column(
children: [
CustomAppBar(),
Expanded(
child: MyCustomBody(),
),
],
),
),
);
}
}
Limit the SingleChildScrollView to certain height using SizedBox
class HomePage extends StatelessWidget {
#override
Widget build(BuildContext context) {
return SafeArea(
child: Scaffold(
body: Column(
children: [
CustomAppBar(),
SizedBox(
height: 650,
child: MyCustomBody(),
),
],
),
),
);
}
}
EDIT: It is better to add Appbar to the scaffold instead of a child. Extends the PreferredSize Widget to your CustomAppBar class and put it inside the scaffold.
Sample:
class CustomAppBar extends PreferredSize {
final Widget child;
final double height;
CustomAppBar({#required this.child, this.height = kToolbarHeight});
#override
Size get preferredSize => Size.fromHeight(height);
#override
Widget build(BuildContext context) {
return
Container(
height: preferredSize.height,
alignment: Alignment.center,
child: child,
);
}
}
i need help for recreate this sample animation with flutter, i try with using showDialog() but i don't see animation, i used Hero() with tag but don'work, please help me!
it can be done using Stack, AnimatedPositioned and AnimatedContainer:
check sample code below:
import 'package:flutter/material.dart';
class MyPage extends StatefulWidget {
#override
_MyPageState createState() => _MyPageState();
}
class _MyPageState extends State<MyPage> {
bool isOpen = false;
// AnimatedContainer dimensions:
double width = 55, height = 55;
// AnimatedPositioned positions:
double left = 20, bottom = 20;
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Container(
color: Color(0xff151515),
child: Stack(
children: <Widget>[
Positioned(
left: 0,
top: 0,
right: 0,
bottom: 0,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text("TIMER", style: TextStyle(color: Colors.white, fontSize: 36, fontWeight: FontWeight.w700),),
Text("00 : 00", style: TextStyle(color: Colors.white, fontSize: 36, fontWeight: FontWeight.w700),),
],
),
),
Positioned(
left: 0,
top: 0,
right: 0,
bottom: 0,
child: GestureDetector(
child: AnimatedOpacity(
// If the widget is visible, animate to 0.0 (invisible).
// If the widget is hidden, animate to 1.0 (fully visible).
opacity: isOpen ? 1.0 : 0.0,
duration: Duration(milliseconds: 500),
// The green box must be a child of the AnimatedOpacity widget.
child: Container(
width: 200.0,
height: 200.0,
color: Colors.black45,
),
),
onTap: () {
if (isOpen) {
setState(() {
width = 55; height = 55;
left = 20; bottom = 20;
isOpen = false;
});
}
},
),
),
AnimatedPositioned(
left: left,
bottom: bottom,
duration: Duration(milliseconds: 500),
curve: Curves.easeInOut,
child: GestureDetector(
child: AnimatedContainer(
width: width,
height: height,
decoration: new BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(28)),
duration: Duration(milliseconds: 500),
curve: Curves.easeInOut,
// child: dialog container content goes here,
),
onTap: () {
if (!isOpen) {
setState(() {
width = 200; height = 200;
left = 60; bottom = 60;
isOpen = !isOpen;
});
}
},
),
),
Positioned(
bottom: 30,
left: 40,
child: IgnorePointer(
child: Text(
'1',
style: TextStyle(color: Colors.white, fontSize: 30),
),
),
),
],
),
),
),
);
}
}