I tried to create un geofencing layer in an image ( google map url)
I have a card with a child image , and I add a circle stack over the map image and I use a slider to change the size of the zone. the problem is that I don't succeded to center the map in my container. The only solution currently found is to use margin to go down the circle but when I change the margin limit the top of the circle and not the center, so my center is shifting...
here is my code example:
new Card (
child :new Stack(
children: <Widget>[
new Container(
width: 200.0,
height: 200.0,
),
new Container(
alignment: new FractionalOffset(0.0, 0.0),
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.blue.withOpacity(0.5),
width: val, // it's my slider variable, to change the size of the circle
),
shape: BoxShape.circle,
),
),
],
),
),
Either use alignment property of Stack like this
new Card(
child: new Stack(
alignment: AlignmentDirectional.center,
children: <Widget>[
new Container(
width: 200.0,
height: 200.0,
),
new Container(
alignment: new FractionalOffset(0.0, 0.0),
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.blue.withOpacity(0.5),
width: 50.0,
),
shape: BoxShape.circle,
),
),
],
),
),
or simply wrap your container widget with FractionalOffsetSet
new Card(
child: new Stack(
alignment: AlignmentDirectional.center,
children: <Widget>[
new Container(
width: 200.0,
height: 200.0,
),
FractionalTranslation(
translation: Offset(0.0, 0.5),
child: new Container(
alignment: new FractionalOffset(0.0, 0.0),
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.blue.withOpacity(0.5),
width: 50.0,
),
shape: BoxShape.circle,
),
),
],
),
),
Wrap your Widget in FractionalTranslation and set the the offset Y value to 0.5
FractionalTranslation(
translation: Offset(0.0, 0.5),
child: new Container(
alignment: new FractionalOffset(0.0, 0.0),
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.blue.withOpacity(0.5),
width: 50.0, // it's my slider variable, to change the size of the circle
),
shape: BoxShape.circle,
),
),
),
You can use Stack's alignment property to center the circle shape:
new Card(
child: new Stack(
alignment: AlignmentDirectional.center,//add this line
children: <Widget>[
new Container(
width: 200.0,
height: 200.0,
),
new Container(
alignment: new FractionalOffset(0.0, 0.0),
decoration: new BoxDecoration(
border: new Border.all(
color: Colors.blue.withOpacity(0.5),
width: val, // it's my slider variable, to change the size of the circle
),
shape: BoxShape.circle,
),
),
],
),
),
Related
I have to create a Card like this:
I had written below code to achieve the desired UI, but it didn't work as expected.
Card(
elevation: 5,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.only(
bottomRight: Radius.circular(10),
topRight: Radius.circular(10)),
side: BorderSide(width: 5, color: Colors.green)),
child: ListTile(),
)
The code above produced this:
Whereas using the code below:
Card(
elevation: 5,
shape: Border(right: BorderSide(color: Colors.red, width: 5)),
child: ListTile(),
)
generated this output:
How can I create the required UI in flutter?
Use the shape parameter in the Card widget, example:
Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15.0),
),
child: Container() )
I have used ClipPath to achieve the UI asked in the question, check out the below code.
Card(
elevation: 2,
child: ClipPath(
child: Container(
height: 100,
decoration: BoxDecoration(
border: Border(right: BorderSide(color: Colors.green, width: 5))),
),
clipper: ShapeBorderClipper(shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(3))),
),
)
This gives the below output,
If there is a better way to achieve said result kindly do answer.
This solution worked for me. If we remove the shape property from the card, it leaves behind rectangular white corners. No limitation of elevation whatsoever.
Card(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15.0),
),
shadowColor: Colors.blueAccent,
elevation: 15,
child: ClipPath(
clipper: ShapeBorderClipper(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(15))),
child: Container(
height: 180,
decoration: BoxDecoration(
border: Border(
left: BorderSide(color: Colors.red, width: 15)),
color: Colors.yellowAccent.shade100,
),
padding: EdgeInsets.all(20.0),
alignment: Alignment.centerLeft,
child: Container()),
),
)
You should place your Card inside a ClipRRect widget :
return ClipRRect(
borderRadius: BorderRadius.circular(15.0),
child: Card(
elevation: 5,
shape: Border(right: BorderSide(color: Colors.red, width: 5)),
child: ListTile(),
),
);
But I advise you to reduce the value of elevation because it is distorting the small circular borders.
For me, all the solutions using clipping cut off some of the shadow. Anyway, I found an easier solution imo:
Wrap the card's child around a Container widget. Specify the rounded rectangle border for the card, then the colored border side for the container.
Card(
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(14)),
child: Container(
decoration: BoxDecoration(
border: Border(right: BorderSide(color: Colors.red, width: 8)
),
child: // your card content
)
)
Instead of using a Card you could also use a Container to achieve this, you can use the gradient property on BoxDecoration. The stops property is going to determine the width of your border. Then you can add your colors and have a nice border.
For the rounded edges you can just use the borderRadius property.
Container(
margin: EdgeInsets.symmetric(
horizontal: 4.0,
vertical: 8.0,
),
padding: EdgeInsets.symmetric(
horizontal: 8.0,
vertical: 12.0,
),
child: Text('A "card" with rounded edges and a border'),
decoration: BoxDecoration(
gradient: LinearGradient(
stops: [0.015, 0.015],
colors: [
Colors.blue,
Colors.white,
],
),
borderRadius: BorderRadius.all(
Radius.circular(5.0),
),
boxShadow: [
BoxShadow(
color: Colors.grey,
blurRadius: 4.0,
offset: Offset(0.0, 1.5),
),
],
),
)
Result from the code above
You can use the clipBehavior in the Card and move the BorderSide to a Container.
Card(
clipBehavior: Clip.antiAlias,
child: Container(
height: 100,
decoration: BoxDecoration(
border: Border(
right: BorderSide(color: Colors.green, width: 5))),
),
)
The red rectangle center of my widget is too big and is not responsive to width and height arguments.
I have updated flutter, and android studio. I started with a container in the shape of a circle then, I used a flatbutton and gave it a shape. but when it becomes the rectangle it is the same size as the circle it resizes in. _isRecord is a boolean that is toggled when the button is pressed.
return Container(
width: 80.0,
height: 80.0,
child: Container(
child: FlatButton(
onPressed: _press,
),
decoration: new BoxDecoration(
color: Colors.red,
shape: _isRecording ? BoxShape.rectangle : BoxShape.circle,
borderRadius: _isRecording ? BorderRadius.all(Radius.circular(8.0)) : null,
),
),
decoration: new BoxDecoration(
color: Colors.black,
shape: BoxShape.circle,
border: Border.all(width: 5.0, color: Colors.white),
),
);
It should look and function like the Voice Memos' record button. It should be a white circle stroke with a red center that when pressed becomes a smaller, rounded rectangle.
You can use your Widget inside Padding
exam:
InkWell(
splashColor: Colors.transparent,
highlightColor: Colors.transparent,
onTap: () {
setState(() {
_isRecording = !_isRecording;
});
},
child: DecoratedBox(
decoration: BoxDecoration(
shape: BoxShape.circle,
border: Border.all(width: 5.0, color: Colors.white),
),
child: Padding(
padding: EdgeInsets.all(32.0),
child: Container(
width: 40.0,
height: 40.0,
child: Container(
decoration: new BoxDecoration(
color: Colors.red,
shape:
_isRecording ? BoxShape.rectangle : BoxShape.circle,
borderRadius: _isRecording
? BorderRadius.all(Radius.circular(8.0))
: null,
),
),
),
),
),
)
I have a bottom sheet in my page. I want to dismiss it when I click outside of it, how to achieve this?
I'm doing it like this:
return new Directionality(
textDirection: TextDirection.rtl,
child: new Theme(
data: theme,
child: new Scaffold(
bottomSheet: Container(
height: MediaQuery.of(context).size.height / 3 + 35,
color:
Color(0x00737373), // This line set the transparent background
child: Padding(
padding: EdgeInsets.only(right: 10.0, left: 10.0),
child: Container(
height: double.infinity,
width: double.infinity,
decoration: BoxDecoration(
color: Color(0xcc2BA04F),
borderRadius: BorderRadius.only(
topLeft: Radius.circular(16.0),
topRight: Radius.circular(16.0))),
child: ....
)),
),
),
body:
...
If I touched outside the bottom sheet it will not dismiss by default. How to make it disappear when tapping outside of it?
Call showBottomSheet() to display the sheet.
void showBottomSheet() {
showModalBottomSheet(
context: context,
builder: (context) {
return Container(
height: MediaQuery.of(context).size.height / 3 + 35,
color: Color(0x00737373), // This line set the transparent background
child: Padding(
padding: EdgeInsets.only(right: 10.0, left: 10.0),
child: Container(
height: double.infinity,
width: double.infinity,
decoration: BoxDecoration(color: Color(0xcc2BA04F), borderRadius: BorderRadius.circular(20)),
),
),
);
},
);
}
I am using Flutter for my app development.
I would like to overlay a poster image view on top of a background image just like in this screenshot below.
The code snippet below does this, but it requires me to also position every other widget including the movie title, release date, etc based on poster's position and background image's position, which is not reliable across several devices and orientation. Is there an example or suggestion to solve this problem?
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new PlatformAdaptiveAppBar(
title: new Text(widget.movie.title),
),
body: new Container(
constraints: new BoxConstraints.expand(),
child: new Stack(
children: <Widget>[
new Container(
child: new Image(
image: new AdvancedNetworkImage(
movieGridUtil.getUrlFromPath(widget.movie.backdrop_path,
MovieGridImageTypes.BACKDROP),
useMemoryCache: false,
useDiskCache: true)),
constraints: new BoxConstraints.expand(height: 250.0),
),
new Positioned(
left: 12.0,
top: 220.0,
child: new Image(
width: 100.0,
height: 150.0,
image: new AdvancedNetworkImage(
movieGridUtil.getUrlFromPath(widget.movie.poster_path,
MovieGridImageTypes.POSTER),
useMemoryCache: false,
useDiskCache: true),
)),
],
)),
);
}
Create Stack
Then inside Stack add Column and make full layout without the poster.
Then as a second Child of Stack, add this combination:
new Stack(
children: [
new Column(
children: _layout()
new Positioned(
top:200,
left:50,
child: _child // or optionaly wrap the child in FractionalTranslation
)]
)
)
Stack(
children: <Widget>[
Container(
color: Colors.blue,
height: 200.0,
),
Padding(
padding: const EdgeInsets.only(left: 20.0,right: 20.0, top:160.0),
child: Container(
color: Colors.pink,
height: 150.0,
width: 110.0,
),
)
],
),
By Creating the Stack,
You can add multiple Container, whichever is last added will be on the top.
Stack(
children: <Widget>[
Container(
color: Colors.blue,
height: 200.0,
),
Padding(
padding: const EdgeInsets.only(left: 20.0,right: 20.0, top:160.0),
child: Container(
color: Colors.pink,
height: 150.0,
width: 110.0,
),
)
],
),
I need to stack widgets like this:
I wrote the code below. However the coins are coming one after another with some default padding. How can I get something like the image above?
Row(
children: <Widget>[
Icon(
Icons.monetization_on, size: 36.0,
color: const Color.fromRGBO(218, 165, 32, 1.0),
),
Icon(
Icons.monetization_on, size: 36.0,
color: const Color.fromRGBO(218, 165, 32, 1.0),
),
],
),
You can use a Stack with Positioned to achieve this:
class StackExample extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(),
body: new Container(
padding: const EdgeInsets.all(8.0),
height: 500.0,
width: 500.0,
// alignment: FractionalOffset.center,
child: new Stack(
//alignment:new Alignment(x, y)
children: <Widget>[
new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0)),
new Positioned(
left: 20.0,
child: new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0)),
),
new Positioned(
left:40.0,
child: new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0)),
)
],
),
),
)
;
}
}
And this how you get some nice shadow drop so the icon stands out more:
class StackExample extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(),
body: new Container(
padding: const EdgeInsets.all(8.0),
height: 500.0,
width: 500.0,
// alignment: FractionalOffset.center,
child: new Stack(
//alignment:new Alignment(x, y)
children: <Widget>[
new Container(
decoration: new BoxDecoration(
borderRadius: BorderRadius.circular(25.0),
boxShadow: [
new BoxShadow(
blurRadius: 5.0,
offset: const Offset(3.0, 0.0),
color: Colors.grey,
)
]
),
child: new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0))),
new Positioned(
left: 20.0,
child: new Container(
decoration: new BoxDecoration(
borderRadius: BorderRadius.circular(25.0),
boxShadow: [
new BoxShadow(
blurRadius: 5.0,
offset: const Offset(3.0, 0.0),
color: Colors.grey,
)
]
),
child: new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0))),
),
new Positioned(
left:40.0,
child: new Container(
decoration: new BoxDecoration(
borderRadius: BorderRadius.circular(25.0),
boxShadow: [
new BoxShadow(
blurRadius: 5.0,
offset: const Offset(3.0, 0.0),
color: Colors.grey,
)
]
)
,child: new Icon(Icons.monetization_on, size: 36.0, color: const Color.fromRGBO(218, 165, 32, 1.0))),
)
],
),
),
)
;
}
}
As of November 2019 I'd like to add a second solution:
Using package: https://pub.dev/packages/assorted_layout_widgets
var widget1 = ...;
var widget2 = ...;
RowSuper(
children: [widget1, widget2],
innerDistance: -20.0,
);
This will overlap row cells by 20 pixels.
The difference from this solution to the one using Stack is that Positioned widgets in a Stack don't occupy space. So you can't make the Stack the size of its contents, unless you know their sizes in advance. However, the RowSuper will have the size of all of its children widgets.
Note, there is also a ColumnSuper. Also note I am the author of this package.
I wanted something without dependencies and without hardcoded layout.
You could enhance by making overlap use a media query to overlap in terms of %.
Widget overlapped() {
final overlap = 10.0;
final items = [
CircleAvatar(child: Text('1'), backgroundColor: Colors.red),
CircleAvatar(child: Text('2'), backgroundColor: Colors.green),
CircleAvatar(child: Text('3'), backgroundColor: Colors.blue),
];
List<Widget> stackLayers = List<Widget>.generate(items.length, (index) {
return Padding(
padding: EdgeInsets.fromLTRB(index.toDouble() * overlap, 0, 0, 0),
child: items[index],
);
});
return Stack(children: stackLayers);
}
Here is my code on Profile Picture overlapped by camera image in flutter.
Output:
Click here to view output image
Container(
constraints: new BoxConstraints(
maxHeight: 200.0,
maxWidth: 200.0
),
padding: new EdgeInsets.only(left: 16.0, bottom: 8.0, right: 16.0),
decoration: new BoxDecoration(
shape: BoxShape.circle,
image: new DecorationImage(
image: new AssetImage('assets/images/profile.png'),
fit: BoxFit.cover,
),
),
child: Stack(
children: [
new Positioned(
right: 0.0,
bottom: 3.0,
child: Container(
constraints: new BoxConstraints(
maxHeight: 50.0,
maxWidth: 50.0
),
decoration: new BoxDecoration(
boxShadow: [
BoxShadow(
color:Color(0xFFdedede),
offset: Offset(2,2)
),
],
color: Colors.white,
shape: BoxShape.circle,
),
child: GestureDetector(
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Icon(
Icons.photo_camera,
size: 34,
color: Color(0xFF00cde7),
),
),
),
),
),
],
),
)
Wraping your elements with OverflowBox and giving the maxWidth value will achieve this effect.
The following can be used in a row or a listview
return SizedBox(
width: 35, //--> list children will be 35 in width
child: OverflowBox(
maxWidth: 50, // --> allowing the child to overflow will cause overlap between elements
child: Container(
width: 50,
child: Text((index + 1).toString()),
),
),
);
You could try my package (signed_spacing_flex). It's exactly the same as a normal Row (or Column and Flex). But it also lets you set negative spacing which causes its children to overlap. You can also set which children should be on top when they overlap.
In your case it would be something like:
SignedSpacingRow(
spacing: -12.0,
stackingOrder: StackingOrder.lastOnTop,
children: <Widget>[
Icon(
Icons.monetization_on, size: 36.0,
color: const Color.fromRGBO(218, 165, 32, 1.0),
),
Icon(
Icons.monetization_on, size: 36.0,
color: const Color.fromRGBO(218, 165, 32, 1.0),
),
],
),
It also works with expanded children if you need.
Reverse variant based on #Lee Higgins
const size = 32.0;
const overlap = size - 6.0;
final containers = [
Container(
decoration: BoxDecoration(
color: Colors.grey[300],
shape: BoxShape.circle,
),
width: size,
height: size,
),
Container(
decoration: BoxDecoration(
color: Colors.grey[400],
shape: BoxShape.circle,
),
width: size,
height: size,
),
];
List<Widget> stackLayers = List<Widget>.generate(containers.length, (index) {
return Padding(
padding: EdgeInsets.fromLTRB(0, 0, index * overlap, 0),
child: containers[index],
);
});
return Stack(alignment: AlignmentDirectional.topEnd, children: stackLayers);
Stack is very much confusing.
The best solution is to use enter link description here