Related
Button's shadow is happened when click the button.
But, the shadow is covered by other widget.
How can I resolve this?
#override
Widget build(BuildContext context) {
int total = 0;
for (int i = 1; i <= count; i++) {
total += i;
}
return Stack(
clipBehavior: Clip.none,
children: [
Container(
width: 343.43,
height: 150.62,
decoration: RadiusAndShadow().getDecoration(),
child: Column(
children: <Widget>[
Header(text: name),
EcRow(t1: '칼로리', t2: '1회당 ${calorie}kcal'),
EcRow(t1: '카드개수', t2: '$count 개'),
EcRow(t1: '반복횟수', t2: '$total회'),
],
),
),
Positioned(
width: 343.43,
height: 150.62,
top: 17,
child: Align(
alignment: Alignment.bottomCenter,
child: Container(
height: 40,
width: 40,
decoration: const BoxDecoration(
shape: BoxShape.circle,
color: Colors.black,
),
child: IconButton(
padding: const EdgeInsets.all(0),
onPressed: () {
Navigator.push(context, MaterialPageRoute(builder: (context) {
return ExEdit();
}));
},
icon: const Icon(
Icons.edit_outlined,
color: Colors.white,
size: 30,
),
),
),
),
),
],
);
}
I used Stack widget.
In Stack, there are Container and Positioned.
In Container, there are Header and Text.
In Positioned, there is an IconButton.
I didn't understand exactly what happens since you did not provide any code, but I think when you click on the IconButton a splash effect happens and not exactly a shadow so inside the IconButton add:
splashRadius: 20,
you can also disable this effect:
return Theme(
data: ThemeData.light().copyWith(
textTheme: GoogleFonts.poppinsTextTheme(),
splashColor: Colors.transparent,
highlightColor: Colors.transparent,
),
child: const WelcomeScreen(),
);
Wrap your IconButton with widget Material
in Material
color: Colors.transparent,
in IconButton
splashRadius: 20,
anyone know how to design this button in flutter? It's a diamond shaped button with a border color.
result
full code
import 'dart:math' as math;
import 'package:flutter/material.dart';
class DimondButton extends StatelessWidget {
const DimondButton({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.black,
body: Center(
child: Transform(
alignment: Alignment.center,
transform: Matrix4.rotationZ(
math.pi / 4,
),
child: Container(
width: 100,
height: 100,
decoration: BoxDecoration(
color: Colors.transparent,
border: Border.all(
width: 3,
color: Colors.amber,
),
),
child: InkWell(
splashColor: Colors.blueAccent,
onTap: () {},
child: Center(
child: Transform(
alignment: Alignment.center,
transform: Matrix4.rotationZ(
-math.pi / 4,
),
child: Text(
"Click",
style: TextStyle(color: Colors.white),
),
),
),
),
),
),
),
);
}
}
you have multiple approaches
you can create a container with border color and transparent inner and transform it using transform.translate
the other one is using custom paint which is a bit harder
You should try to use below code, add this dependency to your pubspec.yaml file flutter_custom_clippers: ^1.1.2 package found here
ClipPath(
clipper: ParallelogramClipper(),
child: Container(
height: 50,
width: 50,
color: Colors.pinkAccent,
child: TextButton(
onPressed: () {
print('object');
},
child: Text('OK'),
),
),
),
If I just throw together an image and some text in a rounded-corner rectangle, the user will not know that they can "click here". But I don't have to bake my own solution. InkWell covers this scenario, complete with a nice shadow.
I am positioning
a custom clickable icon using the
InkWell
class, itself requiring to be inside an
Ink
instance.
import 'package:flutter/material.dart';
const boat_url = ('https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/'
'Segelboot_Bodensee_Mainau_%28Foto_Hilarmont%29.JPG/'
'182px-Segelboot_Bodensee_Mainau_%28Foto_Hilarmont%29.JPG');
void main() {
runApp(MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Image',
home: Scaffold(
backgroundColor: Colors.grey,
body: MyImage(),
)));
}
class MyImage extends StatelessWidget {
MyImage({Key key,});
#override
Widget build(BuildContext context) {
Size sz = MediaQuery.of(context).size * 0.4;
double border = 4;
return Stack(children: [
Positioned(
top: 100,
left: 100,
width: sz.width,
height: sz.height,
child: Material(
child: Ink(
decoration: BoxDecoration(
boxShadow: <BoxShadow>[
new BoxShadow(
color: Colors.red,
blurRadius: 10.0,
offset: new Offset(30.0, 20.0),
),
],
border: Border.all(
color: Colors.blue,
width: border,
),
borderRadius: BorderRadius.circular(40),
),
child: InkWell(
onTap: (){/*..*/},
child: Column(
children: [
Container(
height: 4 * (sz.height - 2 * border) / 5,
alignment: Alignment.center,
child: Image.network(boat_url),
),
Container(
height: (sz.height - 2 * border) / 5,
child: FittedBox(
clipBehavior: Clip.antiAlias,
alignment: Alignment.centerLeft,
fit: BoxFit.fitHeight,
child: Text('A long descriptive sentence')),
)
],
)),
),
)),
]);
}
}
1- I'm not actually using Colors.white, and the Scaffold itself has
backgroundColor: Colors.grey. Where is the white background coming from?
2- When we talk of a "shadow", I'm expecting the shadow to be behind
the ink/inkwell object. Why does the shadow appear in front?
Related: 1
That white color is from the Material widget, to remove that you can use type param.
Material(
type: MaterialType.transparency,
child: Container(),
);
Here is code to achieve the custom button
Video link
Scaffold(
backgroundColor: Colors.blueGrey,
body: SafeArea(
child: Container(
decoration: BoxDecoration(
color: Colors.green.shade200,
border: Border.all(color: Colors.green),
borderRadius: BorderRadius.circular(5),
boxShadow: [
BoxShadow(
blurRadius: 5,
spreadRadius: 2,
color: Colors.black26,
)
]),
margin: const EdgeInsets.all(20),
child: Material(
type: MaterialType.transparency,
child: InkWell(
onTap: () {},
splashColor: Colors.black26,
child: IntrinsicHeight(
child: Padding(
padding: const EdgeInsets.all(12.0),
child: Column(mainAxisSize: MainAxisSize.min, children: [
Image.asset(
'assets/images/marked_tyre_base.png',
fit: BoxFit.cover,
width: 80,
height: 80,
),
const SizedBox(
height: 10,
),
Text(
'Tyre 1',
style: TextStyle(color: Colors.white),
)
]),
),
),
),
),
),
),
);
Screenshot:
Create a class, ImageTextButton:
class ImageTextButton extends StatelessWidget {
final VoidCallback onPressed;
final ImageProvider image;
final double imageHeight;
final double radius;
final Widget text;
ImageTextButton({
#required this.onPressed,
#required this.image,
this.imageHeight = 200,
this.radius = 28,
#required this.text,
});
#override
Widget build(BuildContext context) {
return Card(
elevation: 8,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(radius)),
clipBehavior: Clip.hardEdge,
child: InkWell(
onTap: onPressed,
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
Ink.image(
image: image,
height: imageHeight,
fit: BoxFit.cover,
),
SizedBox(height: 6),
text,
SizedBox(height: 6),
],
),
),
);
}
}
Usage:
ImageTextButton(
onPressed: () {},
image: AssetImage('chocolate_image'),
text: Text('Chocolate'),
)
After doing a bit of research, I tried to wrap ListTiles with InkWell to get the onTap ripple effect, but it doesn't seem to work. This is what I have:
return AnimationLimiter(
child: Scrollbar(
child: ListView.builder(
shrinkWrap: true,
itemCount: widget.myItems.length,
itemBuilder: (context, index) => AnimationConfiguration.staggeredList(
position: index,
duration: const Duration(milliseconds: 300),
child: SlideAnimation(
verticalOffset: 50.0,
child: FadeInAnimation(
child: Material(
/// child: Ink( also tried with Ink and no Ink and no Material just InkWell but no ripple
child: InkWell(
onTap: () => widget.nav(widget.myItems[index]),
splashColor: Colors.red,
child: Card(
child: _itemTile(index),
),
),
),
),
),
),
),
),
);
The ListTile:
return ListTile(
dense: true,
trailing: Icon(Icons.keyboard_arrow_right),
leading: category,
title: Text(
item.title,
style: TextStyle(
color: Colors.black,
fontWeight: FontWeight.bold,
),
),
);
I managed to get the ripple effect working by doing onTap: () => {} to the InkWell. But after adding the GestureDetector, the Ripple is gone again.
child: InkWell(
borderRadius: BorderRadius.circular(8),
onTap: () {},
splashColor: Colors.red,
child: GestureDetector(
onTap: () => widget.nav(widget.myItems[index]),
child: _itemTile(index),
),
),
I even tried this, ripple works, but it the widget.nav function doesn't get called:
Stack(
children: [
Card(
elevation: 1,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
margin:
EdgeInsets.only(bottom: 5.0, left: 2.0, right: 2.0),
child: GestureDetector(
onTap: () {
widget.nav(widget.myItems[index]);
},
child: _itemTile(index),
),
),
Positioned.fill(
child: Material(
color: Colors.transparent,
child: InkWell(
onTap: () => {},
),
),
)
],
),
Edit* Adding the nav function:
_navToItem(item) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Item(
items: _activityItems.length > 0 ? _activityItems : _items,
showAd: false,
user: userStream,
item: item,
favorites: _favorites,
),
),
);
}
ListTile has a ripple effect by default, so you shouldn't need to add an inkwell. If there isn't a ripple, one of the children is probably causing some issues. Try removing some and see if that helps.
Example
You're correct in using the Stack.
It's necessary due to the way the widget tree is rendered from bottom up, layering each widget on top of each other (which blocks the visual effect of splash if there are children below it.)
The GestureDetector you have in your Stack example won't ever get the tap gesture, cause InkWell below it is taking the event.
Something like this work for you? (Move your widget.nav call to the InkWell onTap:.)
Stack(
children: [
Card(
elevation: 1,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(8),
),
margin:
EdgeInsets.only(bottom: 5.0, left: 2.0, right: 2.0),
// GESTUREDETECTOR Removed ****************
child: Text('itemTile goes here'),
),
Positioned.fill(
child: Material(
color: Colors.transparent,
child: InkWell(
onTap: () => print('InkWell tapped! Put widget.nav here!'),
),
),
)
],
)
Please try to understand the concept of it. You should provide some margin to the widget to show the effects. You didn't provide any margin or align so it has no space to show the effects.
Below exp. show the effects in all the page because center creates margin from all the side. The Centre aligns its child widget from the top, left, right and bottom.
Widget build(BuildContext context) {
return Center(
child: Material(
child: new InkWell(
onTap: () {
print("tap");
},
child: Center(
child: Container(
width: 200.0,
height: 200.0,
color: Colors.red,
),
),
),
),
);
}
In your case:
return AnimationLimiter(
child: Scrollbar(
child: ListView.builder(
shrinkWrap: true,
itemCount: widget.myItems.length,
itemBuilder: (context, index) => AnimationConfiguration.staggeredList(
position: index,
duration: const Duration(milliseconds: 300),
child: SlideAnimation(
verticalOffset: 50.0,
child: FadeInAnimation(
child: Material(
/// child: Ink( also tried with Ink and no Ink and no Material just InkWell but no ripple
child: InkWell(
onTap: () => widget.nav(widget.myItems[index]),
splashColor: Colors.red,
child: Center(
child: Card(
child: _itemTile(index),
),
),
),
),
),
),
),
),
),
);
For ListTile case try passing custom ripple color. May be your background and your ripple effect color is same.
There is no need to wrap ListTile with InkWell because it already does it under the hood. We could do this with a Material widget to preserve the ripple effect and to act like a Card widget:
Material(
color: Colors.white,
borderRadius: BorderRadius.circular(4),
elevation: 1,
child: ListTile(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(4)),
leading: Text('Hello World'),
onTap: () => print('Pressed ListTile'),
),
),
Output:
Please change your code
Card(child: InkWell(child: ListTile(), onTab: () {},),),
First of all Card widget, its child Inkwell and then ListTile.
Tapping the container triggers the onTap() handler but does not show any ink splash effect.
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Center(
child: new InkWell(
onTap: (){print("tapped");},
child: new Container(
width: 100.0,
height: 100.0,
color: Colors.orange,
),
),
),
);
}
}
I tried putting the InkWell inside the Container as well but in vain.
I think adding color to the container is covering over the ink effect
https://api.flutter.dev/flutter/material/InkWell/InkWell.html
This code seems to work
body: new Center(
child: new Container(
child: new Material(
child: new InkWell(
onTap: (){print("tapped");},
child: new Container(
width: 100.0,
height: 100.0,
),
),
color: Colors.transparent,
),
color: Colors.orange,
),
),
just click the middle square.
Edit: I found the bug report. https://github.com/flutter/flutter/issues/3782
This is actually as expected, though we should update the docs to make it clearer.
What's going on is that the Material spec says that the splashes are actually ink on the Material. So when we splash, what we do is we literally have the Material widget do the splash. If you have something on top of the Material, we splash under it, and you can't see it.
I have wanted to add a "MaterialImage" widget that conceptually prints its image into the Material as well so that then the splashes would be over the image. We could have a MaterialDecoration which does something similar for a Decoration. Or we could have Material itself take a decoration. Right now it takes a color, but we could extend that to taking a whole decoration. It's not clear whether it's really material-spec-compatible to have a material with a gradient, though, so I'm not sure whether we should do that.
In the short run, if you just need a workaround, you can put a Material on top of the container, with the material set to use the "transparency" type, and then put the ink well inside that.
--hixie
Update: Hixie merged a new Ink solution last year. The Ink provides a convenient way to splash over images.
testWidgets('Does the Ink widget render anything', (WidgetTester tester) async {
await tester.pumpWidget(
new Material(
child: new Center(
child: new Ink(
color: Colors.blue,
width: 200.0,
height: 200.0,
child: new InkWell(
splashColor: Colors.green,
onTap: () { },
),
),
),
),
);
Material(
color: Colors.grey[800],
child: Center(
child: Ink.image(
image: AssetImage('cat.jpeg'),
fit: BoxFit.cover,
width: 300.0,
height: 200.0,
child: InkWell(
onTap: () { /* ... */ },
child: Align(
alignment: Alignment.topLeft,
child: Padding(
padding: const EdgeInsets.all(10.0),
child: Text('KITTEN', style: TextStyle(fontWeight: FontWeight.w900, color: Colors.white)),
),
)
),
),
),
)
Please Note: I did not test the new Ink Widget. I coped the code from ink_paint_test.dart and the Ink class docs
https://github.com/Hixie/flutter/blob/1f6531984984f52328e66c0cd500a8d517964564/packages/flutter/test/material/ink_paint_test.dart
https://github.com/flutter/flutter/pull/13900
https://api.flutter.dev/flutter/material/Ink-class.html
Screenshot:
Use Ink widget wrapped in an InkWell.
InkWell(
onTap: () {}, // Handle your onTap
child: Ink(
width: 200,
height: 200,
color: Colors.blue,
),
)
The InkWell widget must have a Material widget as an ancestor otherwise it can't show effects. E.g.:
Material(
child : InkWell(
child : .....
you have to add onTap method to see the actual effects as like
Buttons {RaisedButton,FlatButton etc}.
e.g -> Material(
child : InkWell(
onTap : (){}
child : .....
Let's come to the main points see some examples below and try to understand
the actual concepts of InkWell.
In Below example Material is parent of InkWell with onTap but it still not working. Please try to understand the concept of it. You should provide some margin to container or other widget to show the effects. Actually below code working fine but we can't see because we did not provide any margin or align so it has no space to show the effects.
Widget build(BuildContext context) {
return Center(
child: Material(
child: new InkWell(
onTap: () {
print("tapped");
},
child: new Container(
width: 100.0,
height: 100.0,
color: Colors.orange,
),
),
),
);
}
Below example show InkWell effects only to upwards because we provide space {margin}.
Widget build(BuildContext context) {
return Center(
child: Material(
child: new InkWell(
onTap: () {
print("tapped");
},
child: new Container(
margin: EdgeInsets.only(top: 100.0),
width: 100.0,
height: 100.0,
color: Colors.orange,
),
),
),
);
}
Below exp. show the effects in all the page because center create margin from all the side. Centre align it's child widget from top, left, right and bottom.
Widget build(BuildContext context) {
return Center(
child: Material(
child: new InkWell(
onTap: () {
print("tapped");
},
child: Center(
child: new Container(
width: 100.0,
height: 100.0,
color: Colors.orange,
),
),
),
),
);
}
InkWell() will never show the ripple effect until you add the
onTap : () {}
or any of the callbacks like onDoubleTap, onLongPress etc.
parameter inside the InkWell as it starts listening to your taps only when you specify this parameter.
I have found this solution for me. I think it can help you:
Material(
color: Theme.of(context).primaryColor,
child: InkWell(
splashColor: Theme.of(context).primaryColorLight,
child: Container(
height: 100,
),
onTap: () {},
),
)
Color is given to Material widget. It is the default color of your widget.
You can adjust color of ripple effect using splashColor property of Inkwell.
A better way is to use the Ink widget instead of any other widget.
Instead of defining color inside container you can define it in Ink widget itself.
Below code will work.
Ink(
color: Colors.orange,
child: InkWell(
child: Container(
width: 100,
height: 100,
),
onTap: () {},
),
)
Do not forget to add a onTap: () {} in the InkWell else it will
not show the ripple effect too.
If you want a Ripple Effect on any widget just:
1- Wrap widget with Material and Inkwell.
2- set color to widget from Material.
3- Never set color to the widget you want it to ripple.
Material (
color: const Color(0xcffFF8906),
child: InkWell(
ontap:() { },
child: Container(
color: Colors.transparent,
height: 80,
width: 80,
)
Quick solution in easy words:
This solution works in any place of the widget tree.
Just add additional Material before InkWell, like so:
return Container(
.......code.......
),
child: Material(
type: MaterialType.transparency,
child: InkWell(
onTap: () {},
child: Container(
.......code.......
),
),
),
);
Reference:
https://api.flutter.dev/flutter/material/InkWell-class.html
Section called "The ink splashes aren't visible!"
Wrap the InkWell with Material and use there the color that you need:
class _MyHomePageState extends State<MyHomePage> {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text(widget.title),
),
body: new Center(
child: Material(
color: Colors.orange,
child: new InkWell(
onTap: (){ print("tapped"); },
child: new Container(
width: 100.0,
height: 100.0,
),
),
),
),
);
}
}
This is the best way I found and use it always. You can try it.
Wrap your Widget with InkWell
Wrap InkWell with Material
Set the opacity 0% anyhow. e.g.: color: Colors.white.withOpacity(0.0),
Material(
color: Colors.white.withOpacity(0.0),
child: InkWell(
child: Container(width: 100, height: 100),
onTap: (){print("Wow! Ripple");},
),
)
This is working for me:
Material(
color: Colors.white.withOpacity(0.0),
child: InkWell(
splashColor: Colors.orange,
child: Text('Hello'), // actually here it's a Container wrapping an image
onTap: () {
print('Click');
},
));
After trying many answers here, it was a combination of:
Setting splashColor
Wrapping InkWell in Material(color: Colors.white.withOpacity(0.0), ..)
Thanks to the answers here that make those 2 points
child: Material(
color: Colors.transparent
child: InkWell(
onTap: (){ print("this Ripple!";},
splashColor: Colors.greenAccent,
child: Container(
height:100.0,
color: Colors.white,
),
),
),
Add Material before InkWell and set color to Colors.transparent.
I ran into this same problem trying to create an alternating color of InkWell's in a ListView. In that particular case, there's a simple solution: wrap the alternates in a Container that uses a mostly transparent tint/brightness change -- the InkWell touch animation will still be visible beneath it. No Material needed. Note there are other issues when trying to work around this with a Materal -- e.g., it will override a DefaultTextStyle you're using with the default (it installs an AnimatedDefaultTextStyle) which is a huge pain.
After you added onTap:(){} listener, ripple effect should work fine. It doesn't work if you use BoxShadow() with in the InkWell() widget.
I was able to make my situation work by using a Stack.
Stack(
children: [
MyCustomWidget(), // <--- Put this on bottom
Material(
color: Colors.transparent,
child: InkWell(
onTap: () {},
child: Ink(
width: 100,
height: 100,
),
),
),
],
),
The reason that the other answers on this page weren't working for me is that my custom widget hid the ink effect and I didn't have a plain image (so I couldn't use Ink.image).
Edit:
You still may be able to use Ink.image if you convert the image to the right format.
now using MaterialButton, in newer version flutter
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 16.0),
child: MaterialButton(
child: Text(
labelText,
style: TextStyle(fontSize: 22),
),
onPressed: () {},
color: backgroundColor,
height: 45,
minWidth: double.infinity,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.all(
Radius.circular(16),
),
),
),
);
}
For handling ripple effect you should use the below rules:
onTap shouldn't be null (or empty).
InkWell must be inside any of the Material Widgets
Single Line:
Use splashColor widget in an InkWell.
InkWell(
onTap: () {}, // Handle your onTap
splashColor: Colors.grey,
child: Container(
width: 200,
height: 200,
),
)
You might have set the properties in theme or parent of the material
ThemeData(
...
splashFactory: NoSplash.splashFactory,
...
)
if you don't want splash effect for specific use it explicitly
InkWell(
splashFactory: NoSplash.splashFactory,
...
child: Row(
...
)
);
Make sure you have not added the below properties in the material theme:
(In my case this was the issue)
splashColor: Colors.transparent
splashFactory: NoSplash.splashFactory
eg:-
MaterialApp(
home:......,
theme: ThemeData(
splashFactory: NoSplash.splashFactory, // Remove this
splashColor: AppColors.transparent, // Remove this OR Change the color
......
),
)
Create a widget that supports tap.
Wrap it in an InkWell widget to manage tap callbacks and ripple
animations.
that's point 2 mentioned in documentation
example:
InkWell(
child: TextButton(
onPressed: () {},
child: Text('Tapped'),
),
),
),
I was hit by a similar problem adding an Inkwell to an existing complex Widget with a Container wrapping a BoxDecoration with a color. By adding the Material and Inkwell in the way suggested the Inkwell was still obscured by the BoxDecoration so I just made the BoxDecoration's color slightly opaque which allowed the Inkwell to be seen
The solution to circular widgets, do like below:
Material(
color: Colors.transparent,
child: Container(
alignment: Alignment.center,
height: 100,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceAround,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
IconButton(
enableFeedback: true,
iconSize: 40,
icon: Icon(
Icons.skip_previous,
color: Colors.white,
size: 40,
),
onPressed: () {}),
IconButton(
iconSize: 100,
enableFeedback: true,
splashColor: Colors.grey,
icon: Icon(Icons.play_circle_filled, color: Colors.white, size: 100),
padding: EdgeInsets.all(0),
onPressed: () {},
),
IconButton(
enableFeedback: true,
iconSize: 40,
icon: Icon(
Icons.skip_next,
color: Colors.white,
size: 40,
),
onPressed: () {}),
],
),
),
)
For me it was another problem. InkWell was not showing ripple effect when i had onTap function as parameter of my widget defined as below.
Function(Result) onTapItem;
...
onTap: onTapItem(result),
I don't know what's the difference, but next code is working well.
onTap: (){ onTapItem(result); },
Adding transparent color to Material worked in my case:
child: new Material(
color: Colors.transparent
child: new InkWell(
onTap: (){},
child: new Container(
width: 100.0,
height: 100.0,
color: Colors.amber,
),
),
),
Instead of providing the color for the Container widget, provide color for the Material widget.
Material(
color: Colors.orange,
child: InkWell(
onTap: () {
print("tapped");
},
child: Container(
width: 100.0,
height: 100.0,
),
),
)